/**
 * File: tools/cli/lib/ui.js
 *
 * BMAD Method - Business Model Agile Development Method
 * Repository: https://github.com/paulpreibisch/BMAD-METHOD
 *
 * Copyright (c) 2025 Paul Preibisch
 * Licensed under the Apache License, Version 2.0
 *
 * ---
 *
 * @fileoverview Interactive installation prompts and user input collection for BMAD CLI
 * @context Guides users through installation configuration including core settings, modules, IDEs, and optional AgentVibes TTS
 * @architecture Facade pattern - presents unified installation flow, delegates to Detector/ConfigCollector/IdeManager for specifics
 * @dependencies inquirer (prompts), chalk (formatting), detector.js (existing installation detection)
 * @entrypoints Called by install.js command via ui.promptInstall(), returns complete configuration object
 * @patterns Progressive disclosure (prompts in order), early IDE selection (Windows compat), AgentVibes auto-detection
 * @related installer.js (consumes config), AgentVibes#34 (TTS integration), promptAgentVibes()
 */

const chalk = require('chalk');
const inquirer = require('inquirer');
const path = require('node:path');
const os = require('node:os');
const fs = require('fs-extra');
const { CLIUtils } = require('./cli-utils');
const { CustomHandler } = require('../installers/lib/custom/handler');

/**
 * UI utilities for the installer
 */
class UI {
  constructor() {}

  /**
   * Prompt for installation configuration
   * @returns {Object} Installation configuration
   */
  async promptInstall() {
    CLIUtils.displayLogo();
    const version = CLIUtils.getVersion();
    CLIUtils.displaySection('BMAD™ Setup', `Build More, Architect Dreams v${version}`);

    const confirmedDirectory = await this.getConfirmedDirectory();

    // Preflight: Check for legacy BMAD v4 footprints immediately after getting directory
    const { Detector } = require('../installers/lib/core/detector');
    const { Installer } = require('../installers/lib/core/installer');
    const detector = new Detector();
    const installer = new Installer();
    const legacyV4 = await detector.detectLegacyV4(confirmedDirectory);
    if (legacyV4.hasLegacyV4) {
      await installer.handleLegacyV4Migration(confirmedDirectory, legacyV4);
    }

    // Check if there's an existing BMAD installation
    const fs = require('fs-extra');
    const path = require('node:path');
    // Use findBmadDir to detect any custom folder names (V6+)
    const bmadDir = await installer.findBmadDir(confirmedDirectory);
    const hasExistingInstall = await fs.pathExists(bmadDir);

    // Always ask for custom content, but we'll handle it differently for new installs
    let customContentConfig = { hasCustomContent: false };
    if (hasExistingInstall) {
      // Existing installation - prompt to add/update custom content
      customContentConfig = await this.promptCustomContentForExisting();
    } else {
      // New installation - we'll prompt after creating the directory structure
      // For now, set a flag to indicate we should ask later
      customContentConfig._shouldAsk = true;
    }

    // Track action type (only set if there's an existing installation)
    let actionType;

    // Only show action menu if there's an existing installation
    if (hasExistingInstall) {
      const promptResult = await inquirer.prompt([
        {
          type: 'list',
          name: 'actionType',
          message: 'What would you like to do?',
          choices: [
            { name: 'Quick Update (Settings Preserved)', value: 'quick-update' },
            { name: 'Modify BMAD Installation (Confirm or change each setting)', value: 'update' },
            { name: 'Remove BMad Folder and Reinstall (Full clean install - BMad Customization Will Be Lost)', value: 'reinstall' },
            { name: 'Compile Agents (Quick rebuild of all agent .md files)', value: 'compile' },
            { name: 'Cancel', value: 'cancel' },
          ],
          default: 'quick-update',
        },
      ]);

      // Extract actionType from prompt result
      actionType = promptResult.actionType;

      // Handle quick update separately
      if (actionType === 'quick-update') {
        // Quick update doesn't install custom content - just updates existing modules
        return {
          actionType: 'quick-update',
          directory: confirmedDirectory,
          customContent: { hasCustomContent: false },
        };
      }

      // Handle agent compilation separately
      if (actionType === 'compile') {
        return {
          actionType: 'compile',
          directory: confirmedDirectory,
        };
      }

      // Handle cancel
      if (actionType === 'cancel') {
        return {
          actionType: 'cancel',
          directory: confirmedDirectory,
        };
      }

      // Handle reinstall - DON'T return early, let it flow through configuration collection
      // The installer will handle deletion when it sees actionType === 'reinstall'
      // For now, just note that we're in reinstall mode and continue below

      // If actionType === 'update' or 'reinstall', continue with normal flow below
    }

    const { installedModuleIds } = await this.getExistingInstallation(confirmedDirectory);
    const coreConfig = await this.collectCoreConfig(confirmedDirectory);

    // For new installations, create the directory structure first so we can cache custom content
    if (!hasExistingInstall && customContentConfig._shouldAsk) {
      // Create the bmad directory based on core config
      const path = require('node:path');
      const fs = require('fs-extra');
      const bmadFolderName = coreConfig.bmad_folder || 'bmad';
      const bmadDir = path.join(confirmedDirectory, bmadFolderName);

      await fs.ensureDir(bmadDir);
      await fs.ensureDir(path.join(bmadDir, '_cfg'));
      await fs.ensureDir(path.join(bmadDir, '_cfg', 'custom'));

      // Now prompt for custom content
      customContentConfig = await this.promptCustomContentLocation();

      // If custom content found, cache it
      if (customContentConfig.hasCustomContent) {
        const { CustomModuleCache } = require('../installers/lib/core/custom-module-cache');
        const cache = new CustomModuleCache(bmadDir);

        const customHandler = new CustomHandler();
        const customFiles = await customHandler.findCustomContent(customContentConfig.customPath);

        for (const customFile of customFiles) {
          const customInfo = await customHandler.getCustomInfo(customFile);
          if (customInfo && customInfo.id) {
            // Cache the module source
            await cache.cacheModule(customInfo.id, customInfo.path, {
              name: customInfo.name,
              type: 'custom',
            });

            console.log(chalk.dim(`  Cached ${customInfo.name} to _cfg/custom/${customInfo.id}`));
          }
        }

        // Update config to use cached modules
        customContentConfig.cachedModules = [];
        for (const customFile of customFiles) {
          const customInfo = await customHandler.getCustomInfo(customFile);
          if (customInfo && customInfo.id) {
            customContentConfig.cachedModules.push({
              id: customInfo.id,
              cachePath: path.join(bmadDir, '_cfg', 'custom', customInfo.id),
              // Store relative path from cache for the manifest
              relativePath: path.join('_cfg', 'custom', customInfo.id),
            });
          }
        }

        console.log(chalk.green(`✓ Cached ${customFiles.length} custom module(s)`));
      }

      // Clear the flag
      delete customContentConfig._shouldAsk;
    }

    // Skip module selection during update/reinstall - keep existing modules
    let selectedModules;
    if (actionType === 'update' || actionType === 'reinstall') {
      // Keep all existing installed modules during update/reinstall
      selectedModules = [...installedModuleIds];
      console.log(chalk.cyan('\n📦 Keeping existing modules: ') + selectedModules.join(', '));
    } else {
      // Only show module selection for new installs
      const moduleChoices = await this.getModuleChoices(installedModuleIds, customContentConfig);
      selectedModules = await this.selectModules(moduleChoices);

      // Check which custom content items were selected
      const selectedCustomContent = selectedModules.filter((mod) => mod.startsWith('__CUSTOM_CONTENT__'));

      // For cached modules (new installs), check if any cached modules were selected
      let selectedCachedModules = [];
      if (customContentConfig.cachedModules) {
        selectedCachedModules = selectedModules.filter(
          (mod) => !mod.startsWith('__CUSTOM_CONTENT__') && customContentConfig.cachedModules.some((cm) => cm.id === mod),
        );
      }

      if (selectedCustomContent.length > 0 || selectedCachedModules.length > 0) {
        customContentConfig.selected = true;

        // Handle directory-based custom content (existing installs)
        if (selectedCustomContent.length > 0) {
          customContentConfig.selectedFiles = selectedCustomContent.map((mod) => mod.replace('__CUSTOM_CONTENT__', ''));
          // Convert custom content to module IDs for installation
          const customContentModuleIds = [];
          const customHandler = new CustomHandler();
          for (const customFile of customContentConfig.selectedFiles) {
            // Get the module info to extract the ID
            const customInfo = await customHandler.getCustomInfo(customFile);
            if (customInfo) {
              customContentModuleIds.push(customInfo.id);
            }
          }
          // Filter out custom content markers and add module IDs
          selectedModules = [...selectedModules.filter((mod) => !mod.startsWith('__CUSTOM_CONTENT__')), ...customContentModuleIds];
        }

        // For cached modules, they're already module IDs, just mark as selected
        if (selectedCachedModules.length > 0) {
          customContentConfig.selectedCachedModules = selectedCachedModules;
          // No need to filter since they're already proper module IDs
        }
      } else if (customContentConfig.hasCustomContent) {
        // User provided custom content but didn't select any
        customContentConfig.selected = false;
        customContentConfig.selectedFiles = [];
        customContentConfig.selectedCachedModules = [];
      }
    }

    // Prompt for AgentVibes TTS integration
    const agentVibesConfig = await this.promptAgentVibes(confirmedDirectory);

    // Collect IDE tool selection AFTER configuration prompts (fixes Windows/PowerShell hang)
    // This allows text-based prompts to complete before the checkbox prompt
    const toolSelection = await this.promptToolSelection(confirmedDirectory, selectedModules);

    // No more screen clearing - keep output flowing

    return {
      actionType: actionType || 'update', // Preserve reinstall or update action
      directory: confirmedDirectory,
      installCore: true, // Always install core
      modules: selectedModules,
      // IDE selection collected after config, will be configured later
      ides: toolSelection.ides,
      skipIde: toolSelection.skipIde,
      coreConfig: coreConfig, // Pass collected core config to installer
      // Custom content configuration
      customContent: customContentConfig,
      enableAgentVibes: agentVibesConfig.enabled,
      agentVibesInstalled: agentVibesConfig.alreadyInstalled,
    };
  }

  /**
   * Prompt for tool/IDE selection (called after module configuration)
   * @param {string} projectDir - Project directory to check for existing IDEs
   * @param {Array} selectedModules - Selected modules from configuration
   * @returns {Object} Tool configuration
   */
  async promptToolSelection(projectDir, selectedModules) {
    // Check for existing configured IDEs - use findBmadDir to detect custom folder names
    const { Detector } = require('../installers/lib/core/detector');
    const { Installer } = require('../installers/lib/core/installer');
    const detector = new Detector();
    const installer = new Installer();
    const bmadDir = await installer.findBmadDir(projectDir || process.cwd());
    const existingInstall = await detector.detect(bmadDir);
    const configuredIdes = existingInstall.ides || [];

    // Get IDE manager to fetch available IDEs dynamically
    const { IdeManager } = require('../installers/lib/ide/manager');
    const ideManager = new IdeManager();

    const preferredIdes = ideManager.getPreferredIdes();
    const otherIdes = ideManager.getOtherIdes();

    // Build IDE choices array with separators
    const ideChoices = [];
    const processedIdes = new Set();

    // First, add previously configured IDEs at the top, marked with ✅
    if (configuredIdes.length > 0) {
      ideChoices.push(new inquirer.Separator('── Previously Configured ──'));
      for (const ideValue of configuredIdes) {
        // Skip empty or invalid IDE values
        if (!ideValue || typeof ideValue !== 'string') {
          continue;
        }

        // Find the IDE in either preferred or other lists
        const preferredIde = preferredIdes.find((ide) => ide.value === ideValue);
        const otherIde = otherIdes.find((ide) => ide.value === ideValue);
        const ide = preferredIde || otherIde;

        if (ide) {
          ideChoices.push({
            name: `${ide.name} ✅`,
            value: ide.value,
            checked: true, // Previously configured IDEs are checked by default
          });
          processedIdes.add(ide.value);
        } else {
          // Warn about unrecognized IDE (but don't fail)
          console.log(chalk.yellow(`⚠️  Previously configured IDE '${ideValue}' is no longer available`));
        }
      }
    }

    // Add preferred tools (excluding already processed)
    const remainingPreferred = preferredIdes.filter((ide) => !processedIdes.has(ide.value));
    if (remainingPreferred.length > 0) {
      ideChoices.push(new inquirer.Separator('── Recommended Tools ──'));
      for (const ide of remainingPreferred) {
        ideChoices.push({
          name: `${ide.name} ⭐`,
          value: ide.value,
          checked: false,
        });
        processedIdes.add(ide.value);
      }
    }

    // Add other tools (excluding already processed)
    const remainingOther = otherIdes.filter((ide) => !processedIdes.has(ide.value));
    if (remainingOther.length > 0) {
      ideChoices.push(new inquirer.Separator('── Additional Tools ──'));
      for (const ide of remainingOther) {
        ideChoices.push({
          name: ide.name,
          value: ide.value,
          checked: false,
        });
      }
    }

    CLIUtils.displaySection('Tool Integration', 'Select AI coding assistants and IDEs to configure');

    let answers;
    let userConfirmedNoTools = false;

    // Loop until user selects at least one tool OR explicitly confirms no tools
    while (!userConfirmedNoTools) {
      answers = await inquirer.prompt([
        {
          type: 'checkbox',
          name: 'ides',
          message: 'Select tools to configure:',
          choices: ideChoices,
          pageSize: 15,
        },
      ]);

      // If tools were selected, we're done
      if (answers.ides && answers.ides.length > 0) {
        break;
      }

      // Warn that no tools were selected - users often miss the spacebar requirement
      console.log();
      console.log(chalk.red.bold('⚠️  WARNING: No tools were selected!'));
      console.log(chalk.red('   You must press SPACEBAR to select items, then ENTER to confirm.'));
      console.log(chalk.red('   Simply highlighting an item does NOT select it.'));
      console.log();

      const { goBack } = await inquirer.prompt([
        {
          type: 'confirm',
          name: 'goBack',
          message: chalk.yellow('Would you like to go back and select at least one tool?'),
          default: true,
        },
      ]);

      if (goBack) {
        // Re-display the section header before looping back
        console.log();
        CLIUtils.displaySection('Tool Integration', 'Select AI coding assistants and IDEs to configure');
      } else {
        // User explicitly chose to proceed without tools
        userConfirmedNoTools = true;
      }
    }

    return {
      ides: answers.ides || [],
      skipIde: !answers.ides || answers.ides.length === 0,
    };
  }

  /**
   * Prompt for update configuration
   * @returns {Object} Update configuration
   */
  async promptUpdate() {
    const answers = await inquirer.prompt([
      {
        type: 'confirm',
        name: 'backupFirst',
        message: 'Create backup before updating?',
        default: true,
      },
      {
        type: 'confirm',
        name: 'preserveCustomizations',
        message: 'Preserve local customizations?',
        default: true,
      },
    ]);

    return answers;
  }

  /**
   * Prompt for module selection
   * @param {Array} modules - Available modules
   * @returns {Array} Selected modules
   */
  async promptModules(modules) {
    const choices = modules.map((mod) => ({
      name: `${mod.name} - ${mod.description}`,
      value: mod.id,
      checked: false,
    }));

    const { selectedModules } = await inquirer.prompt([
      {
        type: 'checkbox',
        name: 'selectedModules',
        message: 'Select modules to add:',
        choices,
        validate: (answer) => {
          if (answer.length === 0) {
            return 'You must choose at least one module.';
          }
          return true;
        },
      },
    ]);

    return selectedModules;
  }

  /**
   * Confirm action
   * @param {string} message - Confirmation message
   * @param {boolean} defaultValue - Default value
   * @returns {boolean} User confirmation
   */
  async confirm(message, defaultValue = false) {
    const { confirmed } = await inquirer.prompt([
      {
        type: 'confirm',
        name: 'confirmed',
        message,
        default: defaultValue,
      },
    ]);

    return confirmed;
  }

  /**
   * Display installation summary
   * @param {Object} result - Installation result
   */
  showInstallSummary(result) {
    CLIUtils.displaySection('Installation Complete', 'BMAD™ has been successfully installed');

    const summary = [
      `📁 Installation Path: ${result.path}`,
      `📦 Modules Installed: ${result.modules?.length > 0 ? result.modules.join(', ') : 'core only'}`,
      `🔧 Tools Configured: ${result.ides?.length > 0 ? result.ides.join(', ') : 'none'}`,
    ];

    // Add AgentVibes TTS info if enabled
    if (result.agentVibesEnabled) {
      summary.push(`🎤 AgentVibes TTS: Enabled`);
    }

    CLIUtils.displayBox(summary.join('\n\n'), {
      borderColor: 'green',
      borderStyle: 'round',
    });

    // Display TTS injection details if present
    if (result.ttsInjectedFiles && result.ttsInjectedFiles.length > 0) {
      console.log('\n' + chalk.cyan.bold('═══════════════════════════════════════════════════'));
      console.log(chalk.cyan.bold('            AgentVibes TTS Injection Summary'));
      console.log(chalk.cyan.bold('═══════════════════════════════════════════════════\n'));

      // Explain what TTS injection is
      console.log(chalk.white.bold('What is TTS Injection?\n'));
      console.log(chalk.dim('  TTS (Text-to-Speech) injection adds voice instructions to BMAD agents,'));
      console.log(chalk.dim('  enabling them to speak their responses aloud using AgentVibes.\n'));
      console.log(chalk.dim('  Example: When you activate the PM agent, it will greet you with'));
      console.log(chalk.dim('  spoken audio like "Hey! I\'m your Project Manager. How can I help?"\n'));

      console.log(chalk.green(`✅ TTS injection applied to ${result.ttsInjectedFiles.length} file(s):\n`));

      // Group by type
      const partyModeFiles = result.ttsInjectedFiles.filter((f) => f.type === 'party-mode');
      const agentTTSFiles = result.ttsInjectedFiles.filter((f) => f.type === 'agent-tts');

      if (partyModeFiles.length > 0) {
        console.log(chalk.yellow('  Party Mode (multi-agent conversations):'));
        for (const file of partyModeFiles) {
          console.log(chalk.dim(`    • ${file.path}`));
        }
      }

      if (agentTTSFiles.length > 0) {
        console.log(chalk.yellow('  Agent TTS (individual agent voices):'));
        for (const file of agentTTSFiles) {
          console.log(chalk.dim(`    • ${file.path}`));
        }
      }

      // Show backup info and restore command
      console.log('\n' + chalk.white.bold('Backups & Recovery:\n'));
      console.log(chalk.dim('  Pre-injection backups are stored in:'));
      console.log(chalk.cyan('    ~/.bmad-tts-backups/\n'));
      console.log(chalk.dim('  To restore original files (removes TTS instructions):'));
      console.log(chalk.cyan(`    bmad-tts-injector.sh --restore ${result.path}\n`));

      console.log(chalk.cyan('💡 BMAD agents will now speak when activated!'));
      console.log(chalk.dim('   Ensure AgentVibes is installed: https://agentvibes.org'));
    }

    console.log('\n' + chalk.green.bold('✨ BMAD is ready to use!'));
  }

  /**
   * Get confirmed directory from user
   * @returns {string} Confirmed directory path
   */
  async getConfirmedDirectory() {
    let confirmedDirectory = null;
    while (!confirmedDirectory) {
      const directoryAnswer = await this.promptForDirectory();
      await this.displayDirectoryInfo(directoryAnswer.directory);

      if (await this.confirmDirectory(directoryAnswer.directory)) {
        confirmedDirectory = directoryAnswer.directory;
      }
    }
    return confirmedDirectory;
  }

  /**
   * Get existing installation info and installed modules
   * @param {string} directory - Installation directory
   * @returns {Object} Object with existingInstall and installedModuleIds
   */
  async getExistingInstallation(directory) {
    const { Detector } = require('../installers/lib/core/detector');
    const { Installer } = require('../installers/lib/core/installer');
    const detector = new Detector();
    const installer = new Installer();
    const bmadDir = await installer.findBmadDir(directory);
    const existingInstall = await detector.detect(bmadDir);
    const installedModuleIds = new Set(existingInstall.modules.map((mod) => mod.id));

    return { existingInstall, installedModuleIds };
  }

  /**
   * Collect core configuration
   * @param {string} directory - Installation directory
   * @returns {Object} Core configuration
   */
  async collectCoreConfig(directory) {
    const { ConfigCollector } = require('../installers/lib/core/config-collector');
    const configCollector = new ConfigCollector();
    // Load existing configs first if they exist
    await configCollector.loadExistingConfig(directory);
    // Now collect with existing values as defaults (false = don't skip loading, true = skip completion message)
    await configCollector.collectModuleConfig('core', directory, false, true);

    return configCollector.collectedConfig.core;
  }

  /**
   * Get module choices for selection
   * @param {Set} installedModuleIds - Currently installed module IDs
   * @param {Object} customContentConfig - Custom content configuration
   * @returns {Array} Module choices for inquirer
   */
  async getModuleChoices(installedModuleIds, customContentConfig = null) {
    const moduleChoices = [];
    const isNewInstallation = installedModuleIds.size === 0;

    const customContentItems = [];
    const hasCustomContentItems = false;

    // Add custom content items
    if (customContentConfig && customContentConfig.hasCustomContent) {
      if (customContentConfig.cachedModules) {
        // New installation - show cached modules
        for (const cachedModule of customContentConfig.cachedModules) {
          // Get the module info from cache
          const yaml = require('js-yaml');
          const fs = require('fs-extra');

          // Try multiple possible config file locations
          const possibleConfigPaths = [
            path.join(cachedModule.cachePath, 'module.yaml'),
            path.join(cachedModule.cachePath, 'custom.yaml'),
            path.join(cachedModule.cachePath, '_module-installer', 'module.yaml'),
            path.join(cachedModule.cachePath, '_module-installer', 'custom.yaml'),
          ];

          let moduleData = null;
          let foundPath = null;

          for (const configPath of possibleConfigPaths) {
            if (await fs.pathExists(configPath)) {
              try {
                const yamlContent = await fs.readFile(configPath, 'utf8');
                moduleData = yaml.load(yamlContent);
                foundPath = configPath;
                break;
              } catch (error) {
                throw new Error(`Failed to parse config at ${configPath}: ${error.message}`);
              }
            }
          }

          if (moduleData) {
            // Use the name from the custom info if we have it
            const moduleName = cachedModule.name || moduleData.name || cachedModule.id;

            customContentItems.push({
              name: `${chalk.cyan('✓')} ${moduleName} ${chalk.gray('(cached)')}`,
              value: cachedModule.id, // Use module ID directly
              checked: true, // Default to selected
              cached: true,
            });
          } else {
            // Module config not found - skip silently (non-critical)
          }
        }
      } else if (customContentConfig.customPath) {
        // Existing installation - show from directory
        const customHandler = new CustomHandler();
        const customFiles = await customHandler.findCustomContent(customContentConfig.customPath);

        for (const customFile of customFiles) {
          const customInfo = await customHandler.getCustomInfo(customFile);
          if (customInfo) {
            customContentItems.push({
              name: `${chalk.cyan('✓')} ${customInfo.name} ${chalk.gray(`(${customInfo.relativePath})`)}`,
              value: `__CUSTOM_CONTENT__${customFile}`, // Unique value for each custom content
              checked: true, // Default to selected since user chose to provide custom content
              path: customInfo.path, // Track path to avoid duplicates
            });
          }
        }
      }
    }

    // Add official modules
    const { ModuleManager } = require('../installers/lib/modules/manager');
    // For new installations, don't scan project yet (will do after custom content is discovered)
    // For existing installations, scan if user selected custom content
    const shouldScanProject =
      !isNewInstallation && customContentConfig && customContentConfig.hasCustomContent && customContentConfig.selected;
    const moduleManager = new ModuleManager({
      scanProjectForModules: shouldScanProject,
    });
    const { modules: availableModules, customModules: customModulesFromProject } = await moduleManager.listAvailable();

    // First, add all items to appropriate sections
    const allCustomModules = [];

    // Add custom content items from directory
    allCustomModules.push(...customContentItems);

    // Add custom modules from project scan (if scanning is enabled)
    for (const mod of customModulesFromProject) {
      // Skip if this module is already in customContentItems (by path)
      const isDuplicate = allCustomModules.some((item) => item.path && mod.path && path.resolve(item.path) === path.resolve(mod.path));

      if (!isDuplicate) {
        allCustomModules.push({
          name: `${chalk.cyan('✓')} ${mod.name} ${chalk.gray(`(${mod.source})`)}`,
          value: mod.id,
          checked: isNewInstallation ? mod.defaultSelected || false : installedModuleIds.has(mod.id),
        });
      }
    }

    // Add separators and modules in correct order
    if (allCustomModules.length > 0) {
      // Add separator for custom content, all custom modules, and official content separator
      moduleChoices.push(
        new inquirer.Separator('── Custom Content ──'),
        ...allCustomModules,
        new inquirer.Separator('── Official Content ──'),
      );
    }

    // Add official modules (only non-custom ones)
    for (const mod of availableModules) {
      if (!mod.isCustom) {
        moduleChoices.push({
          name: mod.name,
          value: mod.id,
          checked: isNewInstallation ? mod.defaultSelected || false : installedModuleIds.has(mod.id),
        });
      }
    }

    return moduleChoices;
  }

  /**
   * Prompt for module selection
   * @param {Array} moduleChoices - Available module choices
   * @returns {Array} Selected module IDs
   */
  async selectModules(moduleChoices) {
    CLIUtils.displaySection('Module Selection', 'Choose the BMAD modules to install');

    const moduleAnswer = await inquirer.prompt([
      {
        type: 'checkbox',
        name: 'modules',
        message: 'Select modules to install:',
        choices: moduleChoices,
      },
    ]);

    return moduleAnswer.modules || [];
  }

  /**
   * Prompt for directory selection
   * @returns {Object} Directory answer from inquirer
   */
  async promptForDirectory() {
    return await inquirer.prompt([
      {
        type: 'input',
        name: 'directory',
        message: `Installation directory:`,
        default: process.cwd(),
        validate: async (input) => this.validateDirectory(input),
        filter: (input) => {
          // If empty, use the default
          if (!input || input.trim() === '') {
            return process.cwd();
          }
          return this.expandUserPath(input);
        },
      },
    ]);
  }

  /**
   * Display directory information
   * @param {string} directory - The directory path
   */
  async displayDirectoryInfo(directory) {
    console.log(chalk.cyan('\nResolved installation path:'), chalk.bold(directory));

    const dirExists = await fs.pathExists(directory);
    if (dirExists) {
      // Show helpful context about the existing path
      const stats = await fs.stat(directory);
      if (stats.isDirectory()) {
        const files = await fs.readdir(directory);
        if (files.length > 0) {
          // Check for any bmad installation (any folder with _cfg/manifest.yaml)
          const { Installer } = require('../installers/lib/core/installer');
          const installer = new Installer();
          const bmadDir = await installer.findBmadDir(directory);
          const hasBmadInstall = (await fs.pathExists(bmadDir)) && (await fs.pathExists(path.join(bmadDir, '_cfg', 'manifest.yaml')));

          console.log(
            chalk.gray(`Directory exists and contains ${files.length} item(s)`) +
              (hasBmadInstall ? chalk.yellow(` including existing BMAD installation (${path.basename(bmadDir)})`) : ''),
          );
        } else {
          console.log(chalk.gray('Directory exists and is empty'));
        }
      }
    }
  }

  /**
   * Prompt for custom content location
   * @returns {Object} Custom content configuration
   */
  async promptCustomContentLocation() {
    try {
      // Skip custom content installation - always return false
      return { hasCustomContent: false };

      // TODO: Custom content installation temporarily disabled
      // CLIUtils.displaySection('Custom Content', 'Optional: Add custom agents, workflows, and modules');

      // const { hasCustomContent } = await inquirer.prompt([
      //   {
      //     type: 'list',
      //     name: 'hasCustomContent',
      //     message: 'Do you have custom content to install?',
      //     choices: [
      //       { name: 'No (skip custom content)', value: 'none' },
      //       { name: 'Enter a directory path', value: 'directory' },
      //       { name: 'Enter a URL', value: 'url' },
      //     ],
      //     default: 'none',
      //   },
      // ]);

      // if (hasCustomContent === 'none') {
      //   return { hasCustomContent: false };
      // }

      // TODO: Custom content installation temporarily disabled
      // if (hasCustomContent === 'url') {
      //   console.log(chalk.yellow('\nURL-based custom content installation is coming soon!'));
      //   console.log(chalk.cyan('For now, please download your custom content and choose "Enter a directory path".\n'));
      //   return { hasCustomContent: false };
      // }

      // if (hasCustomContent === 'directory') {
      //   let customPath;
      //   while (!customPath) {
      //     let expandedPath;
      //     const { directory } = await inquirer.prompt([
      //       {
      //         type: 'input',
      //         name: 'directory',
      //         message: 'Enter directory to search for custom content (will scan subfolders):',
      //         default: process.cwd(), // Use actual current working directory
      //         validate: async (input) => {
      //           if (!input || input.trim() === '') {
      //             return 'Please enter a directory path';
      //           }

      //           try {
      //             expandedPath = this.expandUserPath(input.trim());
      //           } catch (error) {
      //             return error.message;
      //           }

      //           // Check if the path exists
      //           const pathExists = await fs.pathExists(expandedPath);
      //           if (!pathExists) {
      //             return 'Directory does not exist';
      //           }

      //           return true;
      //         },
      //       },
      //     ]);

      //     // Now expand the path for use after the prompt
      //     expandedPath = this.expandUserPath(directory.trim());

      //     // Check if directory has custom content
      //     const customHandler = new CustomHandler();
      //     const customFiles = await customHandler.findCustomContent(expandedPath);

      //     if (customFiles.length === 0) {
      //       console.log(chalk.yellow(`\nNo custom content found in ${expandedPath}`));

      //       const { tryAgain } = await inquirer.prompt([
      //         {
      //           type: 'confirm',
      //           name: 'tryAgain',
      //           message: 'Try a different directory?',
      //           default: true,
      //         },
      //       ]);

      //       if (tryAgain) {
      //         continue;
      //       } else {
      //         return { hasCustomContent: false };
      //       }
      //     }

      //     customPath = expandedPath;
      //     console.log(chalk.green(`\n✓ Found ${customFiles.length} custom content item(s):`));
      //     for (const file of customFiles) {
      //       const relativePath = path.relative(expandedPath, path.dirname(file));
      //       const folderName = path.dirname(file).split(path.sep).pop();
      //       console.log(chalk.dim(`  • ${folderName} ${chalk.gray(`(${relativePath})`)}`));
      //     }
      //   }

      //   return { hasCustomContent: true, customPath };
      // }

      // return { hasCustomContent: false };
    } catch (error) {
      console.error(chalk.red('Error in custom content prompt:'), error);
      return { hasCustomContent: false };
    }
  }

  /**
   * Confirm directory selection
   * @param {string} directory - The directory path
   * @returns {boolean} Whether user confirmed
   */
  async confirmDirectory(directory) {
    const dirExists = await fs.pathExists(directory);

    if (dirExists) {
      const confirmAnswer = await inquirer.prompt([
        {
          type: 'confirm',
          name: 'proceed',
          message: `Install to this directory?`,
          default: true,
        },
      ]);

      if (!confirmAnswer.proceed) {
        console.log(chalk.yellow("\nLet's try again with a different path.\n"));
      }

      return confirmAnswer.proceed;
    } else {
      // Ask for confirmation to create the directory
      const createConfirm = await inquirer.prompt([
        {
          type: 'confirm',
          name: 'create',
          message: `The directory '${directory}' doesn't exist. Would you like to create it?`,
          default: false,
        },
      ]);

      if (!createConfirm.create) {
        console.log(chalk.yellow("\nLet's try again with a different path.\n"));
      }

      return createConfirm.create;
    }
  }

  /**
   * Validate directory path for installation
   * @param {string} input - User input path
   * @returns {string|true} Error message or true if valid
   */
  async validateDirectory(input) {
    // Allow empty input to use the default
    if (!input || input.trim() === '') {
      return true; // Empty means use default
    }

    let expandedPath;
    try {
      expandedPath = this.expandUserPath(input.trim());
    } catch (error) {
      return error.message;
    }

    // Check if the path exists
    const pathExists = await fs.pathExists(expandedPath);

    if (!pathExists) {
      // Find the first existing parent directory
      const existingParent = await this.findExistingParent(expandedPath);

      if (!existingParent) {
        return 'Cannot create directory: no existing parent directory found';
      }

      // Check if the existing parent is writable
      try {
        await fs.access(existingParent, fs.constants.W_OK);
        // Path doesn't exist but can be created - will prompt for confirmation later
        return true;
      } catch {
        // Provide a detailed error message explaining both issues
        return `Directory '${expandedPath}' does not exist and cannot be created: parent directory '${existingParent}' is not writable`;
      }
    }

    // If it exists, validate it's a directory and writable
    const stat = await fs.stat(expandedPath);
    if (!stat.isDirectory()) {
      return `Path exists but is not a directory: ${expandedPath}`;
    }

    // Check write permissions
    try {
      await fs.access(expandedPath, fs.constants.W_OK);
    } catch {
      return `Directory is not writable: ${expandedPath}`;
    }

    return true;
  }

  /**
   * Find the first existing parent directory
   * @param {string} targetPath - The path to check
   * @returns {string|null} The first existing parent directory, or null if none found
   */
  async findExistingParent(targetPath) {
    let currentPath = path.resolve(targetPath);

    // Walk up the directory tree until we find an existing directory
    while (currentPath !== path.dirname(currentPath)) {
      // Stop at root
      const parent = path.dirname(currentPath);
      if (await fs.pathExists(parent)) {
        return parent;
      }
      currentPath = parent;
    }

    return null; // No existing parent found (shouldn't happen in practice)
  }

  /**
   * Expands the user-provided path: handles ~ and resolves to absolute.
   * @param {string} inputPath - User input path.
   * @returns {string} Absolute expanded path.
   */
  expandUserPath(inputPath) {
    if (typeof inputPath !== 'string') {
      throw new TypeError('Path must be a string.');
    }

    let expanded = inputPath.trim();

    // Handle tilde expansion
    if (expanded.startsWith('~')) {
      if (expanded === '~') {
        expanded = os.homedir();
      } else if (expanded.startsWith('~' + path.sep)) {
        const pathAfterHome = expanded.slice(2); // Remove ~/ or ~\
        expanded = path.join(os.homedir(), pathAfterHome);
      } else {
        const restOfPath = expanded.slice(1);
        const separatorIndex = restOfPath.indexOf(path.sep);
        const username = separatorIndex === -1 ? restOfPath : restOfPath.slice(0, separatorIndex);
        if (username) {
          throw new Error(`Path expansion for ~${username} is not supported. Please use an absolute path or ~${path.sep}`);
        }
      }
    }

    // Resolve to the absolute path relative to the current working directory
    return path.resolve(expanded);
  }

  /**
   * @function promptAgentVibes
   * @intent Ask user if they want AgentVibes TTS integration during BMAD installation
   * @why Enables optional voice features without forcing TTS on users who don't want it
   * @param {string} projectDir - Absolute path to user's project directory
   * @returns {Promise<Object>} Configuration object: { enabled: boolean, alreadyInstalled: boolean }
   * @sideeffects None - pure user input collection, no files written
   * @edgecases Shows warning if user enables TTS but AgentVibes not detected
   * @calledby promptInstall() during installation flow, after core config, before IDE selection
   * @calls checkAgentVibesInstalled(), inquirer.prompt(), chalk.green/yellow/dim()
   *
   * AI NOTE: This prompt is strategically positioned in installation flow:
   * - AFTER core config (bmad_folder, user_name, etc)
   * - BEFORE IDE selection (which can hang on Windows/PowerShell)
   *
   * Flow Logic:
   * 1. Auto-detect if AgentVibes already installed (checks for hook files)
   * 2. Show detection status to user (green checkmark or gray "not detected")
   * 3. Prompt: "Enable AgentVibes TTS?" (defaults to true if detected)
   * 4. If user says YES but AgentVibes NOT installed:
   *    → Show warning with installation link (graceful degradation)
   * 5. Return config to promptInstall(), which passes to installer.install()
   *
   * State Flow:
   * promptAgentVibes() → { enabled, alreadyInstalled }
   *                    ↓
   * promptInstall() → config.enableAgentVibes
   *                    ↓
   * installer.install() → this.enableAgentVibes
   *                    ↓
   * processTTSInjectionPoints() → injects OR strips markers
   *
   * RELATED:
   * ========
   * - Detection: checkAgentVibesInstalled() - looks for bmad-speak.sh and play-tts.sh
   * - Processing: installer.js::processTTSInjectionPoints()
   * - Markers: src/core/workflows/party-mode/instructions.md:101, src/modules/bmm/agents/*.md
   * - GitHub Issue: paulpreibisch/AgentVibes#36
   */
  async promptAgentVibes(projectDir) {
    CLIUtils.displaySection('🎤 Voice Features', 'Enable TTS for multi-agent conversations');

    // Check if AgentVibes is already installed
    const agentVibesInstalled = await this.checkAgentVibesInstalled(projectDir);

    if (agentVibesInstalled) {
      console.log(chalk.green('  ✓ AgentVibes detected'));
    } else {
      console.log(chalk.dim('  AgentVibes not detected'));
    }

    const answers = await inquirer.prompt([
      {
        type: 'confirm',
        name: 'enableTts',
        message: 'Enable Agents to Speak Out loud (powered by Agent Vibes? Claude Code only currently)',
        default: false, // Default to yes - recommended for best experience
      },
    ]);

    if (answers.enableTts && !agentVibesInstalled) {
      console.log(chalk.yellow('\n  ⚠️  AgentVibes not installed'));
      console.log(chalk.dim('  Install AgentVibes separately to enable TTS:'));
      console.log(chalk.dim('  https://github.com/paulpreibisch/AgentVibes\n'));
    }

    return {
      enabled: answers.enableTts,
      alreadyInstalled: agentVibesInstalled,
    };
  }

  /**
   * @function checkAgentVibesInstalled
   * @intent Detect if AgentVibes TTS hooks are present in user's project
   * @why Allows auto-enabling TTS and showing helpful installation guidance
   * @param {string} projectDir - Absolute path to user's project directory
   * @returns {Promise<boolean>} true if both required AgentVibes hooks exist, false otherwise
   * @sideeffects None - read-only file existence checks
   * @edgecases Returns false if either hook missing (both required for functional TTS)
   * @calledby promptAgentVibes() to determine default value and show detection status
   * @calls fs.pathExists() twice (bmad-speak.sh, play-tts.sh)
   *
   * AI NOTE: This checks for the MINIMUM viable AgentVibes installation.
   *
   * Required Files:
   * ===============
   * 1. .claude/hooks/bmad-speak.sh
   *    - Maps agent display names → agent IDs → voice profiles
   *    - Calls play-tts.sh with agent's assigned voice
   *    - Created by AgentVibes installer
   *
   * 2. .claude/hooks/play-tts.sh
   *    - Core TTS router (ElevenLabs or Piper)
   *    - Provider-agnostic interface
   *    - Required by bmad-speak.sh
   *
   * Why Both Required:
   * ==================
   * - bmad-speak.sh alone: No TTS backend
   * - play-tts.sh alone: No BMAD agent voice mapping
   * - Both together: Full party mode TTS integration
   *
   * Detection Strategy:
   * ===================
   * We use simple file existence (not version checks) because:
   * - Fast and reliable
   * - Works across all AgentVibes versions
   * - User will discover version issues when TTS runs (fail-fast)
   *
   * PATTERN: Adding New Detection Criteria
   * =======================================
   * If future AgentVibes features require additional files:
   * 1. Add new pathExists check to this function
   * 2. Update documentation in promptAgentVibes()
   * 3. Consider: should missing file prevent detection or just log warning?
   *
   * RELATED:
   * ========
   * - AgentVibes Installer: creates these hooks
   * - bmad-speak.sh: calls play-tts.sh with agent voices
   * - Party Mode: uses bmad-speak.sh for agent dialogue
   */
  async checkAgentVibesInstalled(projectDir) {
    const fs = require('fs-extra');
    const path = require('node:path');

    // Check for AgentVibes hook files
    const hookPath = path.join(projectDir, '.claude', 'hooks', 'bmad-speak.sh');
    const playTtsPath = path.join(projectDir, '.claude', 'hooks', 'play-tts.sh');

    return (await fs.pathExists(hookPath)) && (await fs.pathExists(playTtsPath));
  }

  /**
   * Prompt for custom content for existing installations
   * @returns {Object} Custom content configuration
   */
  async promptCustomContentForExisting() {
    try {
      CLIUtils.displaySection('Custom Content', 'Add new custom agents, workflows, or modules to your installation');

      const { hasCustomContent } = await inquirer.prompt([
        {
          type: 'list',
          name: 'hasCustomContent',
          message: 'Do you want to add or update custom content?',
          choices: [
            {
              name: 'No, continue with current installation only',
              value: false,
            },
            {
              name: 'Yes, I have custom content to add or update',
              value: true,
            },
          ],
          default: false,
        },
      ]);

      if (!hasCustomContent) {
        return { hasCustomContent: false };
      }

      // Get directory path
      const { customPath } = await inquirer.prompt([
        {
          type: 'input',
          name: 'customPath',
          message: 'Enter directory to search for custom content (will scan subfolders):',
          default: process.cwd(),
          validate: async (input) => {
            if (!input || input.trim() === '') {
              return 'Please enter a directory path';
            }

            // Normalize and check if path exists
            const expandedPath = CLIUtils.expandPath(input.trim());
            const pathExists = await fs.pathExists(expandedPath);
            if (!pathExists) {
              return 'Directory does not exist';
            }

            // Check if it's actually a directory
            const stats = await fs.stat(expandedPath);
            if (!stats.isDirectory()) {
              return 'Path must be a directory';
            }

            return true;
          },
          transformer: (input) => {
            return CLIUtils.expandPath(input);
          },
        },
      ]);

      const resolvedPath = CLIUtils.expandPath(customPath);

      // Find custom content
      const customHandler = new CustomHandler();
      const customFiles = await customHandler.findCustomContent(resolvedPath);

      if (customFiles.length === 0) {
        console.log(chalk.yellow(`\nNo custom content found in ${resolvedPath}`));

        const { tryDifferent } = await inquirer.prompt([
          {
            type: 'confirm',
            name: 'tryDifferent',
            message: 'Try a different directory?',
            default: true,
          },
        ]);

        if (tryDifferent) {
          return await this.promptCustomContentForExisting();
        }

        return { hasCustomContent: false };
      }

      // Display found items
      console.log(chalk.cyan(`\nFound ${customFiles.length} custom content file(s):`));
      const customContentItems = [];

      for (const customFile of customFiles) {
        const customInfo = await customHandler.getCustomInfo(customFile);
        if (customInfo) {
          customContentItems.push({
            name: `${chalk.cyan('✓')} ${customInfo.name} ${chalk.gray(`(${customInfo.relativePath})`)}`,
            value: `__CUSTOM_CONTENT__${customFile}`,
            checked: true,
          });
        }
      }

      // Add option to keep existing custom content
      console.log(chalk.yellow('\nExisting custom modules will be preserved unless you remove them'));

      const { selectedFiles } = await inquirer.prompt([
        {
          type: 'checkbox',
          name: 'selectedFiles',
          message: 'Select custom content to add:',
          choices: customContentItems,
          pageSize: 15,
          validate: (answer) => {
            if (answer.length === 0) {
              return 'You must select at least one item';
            }
            return true;
          },
        },
      ]);

      return {
        hasCustomContent: true,
        customPath: resolvedPath,
        selected: true,
        selectedFiles: selectedFiles,
      };
    } catch (error) {
      console.error(chalk.red('Error configuring custom content:'), error);
      return { hasCustomContent: false };
    }
  }
}

module.exports = { UI };