/**
 * Integration tests for the content-aware resize (seam carving via caire) API endpoint.
 *
 * This tool uses the caire Go binary. In environments where caire is not
 * installed the route will return 422. Tests gracefully handle both scenarios
 * while still verifying route existence and input validation.
 */

import { readFileSync } from "node:fs";
import { join } from "node:path";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";

const FIXTURES = join(__dirname, "..", "fixtures");
const PNG_200x150 = readFileSync(join(FIXTURES, "test-200x150.png"));
const HEIC = readFileSync(join(FIXTURES, "test-200x150.heic"));
const JPG = readFileSync(join(FIXTURES, "test-100x100.jpg"));

let testApp: TestApp;
let app: TestApp["app"];
let adminToken: string;

beforeAll(async () => {
  testApp = await buildTestApp();
  app = testApp.app;
  adminToken = await loginAsAdmin(app);
}, 30_000);

afterAll(async () => {
  await testApp.cleanup();
}, 10_000);

describe("Content-Aware Resize", () => {
  it("route exists and responds to POST", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({ width: 150, height: 120, protectFaces: false }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    // 200 = caire available, 422 = caire not found
    expect([200, 422]).toContain(res.statusCode);
  }, 60_000);

  it("rejects requests without a file", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "settings", content: JSON.stringify({ width: 150 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });

  it("rejects requests without width, height, or square", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
    const resBody = JSON.parse(res.body);
    expect(resBody.error).toContain("width, height, or square");
  });

  it("processes with only width specified", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 150, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    // Accept 200 (caire available) or 422 (caire not available)
    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      expect(resBody.width).toBe(150);
    }
  }, 60_000);

  it("processes with only height specified", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ height: 120, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      expect(resBody.height).toBe(120);
    }
  }, 60_000);

  it("supports enlargement via seam insertion", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 300, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    // 200 = caire enlarged successfully, 422 = caire not available
    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      expect(resBody.width).toBe(300);
    }
  }, 60_000);

  it("accepts blurRadius and sobelThreshold options", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({
          width: 150,
          protectFaces: false,
          blurRadius: 6,
          sobelThreshold: 4,
        }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      expect(resBody.width).toBe(150);
    }
  }, 60_000);

  it("supports square mode", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ square: true, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      // Square mode produces equal width and height
      expect(resBody.width).toBe(resBody.height);
    }
  }, 60_000);

  it("rejects invalid blurRadius", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({ width: 150, blurRadius: 50 }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });

  it("rejects invalid sobelThreshold", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({ width: 150, sobelThreshold: 0 }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });

  it("rejects invalid settings JSON", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: "not-json{{{" },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
    const result = JSON.parse(res.body);
    expect(result.error).toMatch(/json/i);
  });

  it("rejects invalid image data", async () => {
    const { body, contentType } = createMultipartPayload([
      {
        name: "file",
        filename: "bad.png",
        contentType: "image/png",
        content: Buffer.from("not an image"),
      },
      { name: "settings", content: JSON.stringify({ width: 150 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
    const result = JSON.parse(res.body);
    expect(result.error).toMatch(/invalid image/i);
  });

  it(
    "handles HEIC input (decodes before processing)",
    { timeout: 120_000 },
    async () => {
      const { body, contentType } = createMultipartPayload([
        { name: "file", filename: "test.heic", contentType: "image/heic", content: HEIC },
        { name: "settings", content: JSON.stringify({ width: 150, protectFaces: false }) },
      ]);

      const res = await app.inject({
        method: "POST",
        url: "/api/v1/tools/content-aware-resize",
        headers: {
          authorization: `Bearer ${adminToken}`,
          "content-type": contentType,
        },
        body,
      });

      // HEIC decode or caire may not be available
      expect([200, 422]).toContain(res.statusCode);

      if (res.statusCode === 200) {
        const resBody = JSON.parse(res.body);
        expect(resBody.downloadUrl).toBeDefined();
      }
    },
    60_000,
  );

  it("processes both width and height simultaneously", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({ width: 120, height: 100, protectFaces: false }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
      expect(resBody.width).toBe(120);
      expect(resBody.height).toBe(100);
    }
  }, 60_000);

  it("returns expected response fields on success", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 150, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody).toHaveProperty("jobId");
      expect(resBody).toHaveProperty("downloadUrl");
      expect(resBody).toHaveProperty("originalSize");
      expect(resBody).toHaveProperty("processedSize");
      expect(resBody).toHaveProperty("width");
      expect(resBody).toHaveProperty("height");
      expect(resBody.originalSize).toBeGreaterThan(0);
      expect(resBody.processedSize).toBeGreaterThan(0);
    }
  }, 60_000);

  it("returns 400 when file is empty", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "empty.png", contentType: "image/png", content: Buffer.alloc(0) },
      { name: "settings", content: JSON.stringify({ width: 150 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
    const result = JSON.parse(res.body);
    expect(result.error).toMatch(/no image/i);
  });

  it("processes JPEG input", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.jpg", contentType: "image/jpeg", content: JPG },
      { name: "settings", content: JSON.stringify({ width: 80, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      expect(resBody.downloadUrl).toBeDefined();
    }
  }, 60_000);

  it("downloads output and verifies it is a valid image", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 180, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);

    if (res.statusCode === 200) {
      const resBody = JSON.parse(res.body);
      const dlRes = await app.inject({
        method: "GET",
        url: resBody.downloadUrl,
        headers: { authorization: `Bearer ${adminToken}` },
      });
      expect(dlRes.statusCode).toBe(200);
      expect(dlRes.rawPayload.length).toBeGreaterThan(0);
    }
  }, 60_000);

  it("processes with default blurRadius and sobelThreshold", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 160 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);
  }, 60_000);

  it("processes a 1x1 pixel image", async () => {
    const { readFileSync } = await import("node:fs");
    const { join } = await import("node:path");
    const TINY = readFileSync(join(__dirname, "..", "fixtures", "test-1x1.png"));
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "tiny.png", contentType: "image/png", content: TINY },
      { name: "settings", content: JSON.stringify({ square: true, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    // 1x1 may fail if caire can't shrink further, or succeed
    expect([200, 422]).toContain(res.statusCode);
  }, 60_000);

  it("processes a large stress image", async () => {
    const { readFileSync } = await import("node:fs");
    const { join } = await import("node:path");
    const LARGE = readFileSync(join(__dirname, "..", "fixtures", "content", "stress-large.jpg"));
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "large.jpg", contentType: "image/jpeg", content: LARGE },
      { name: "settings", content: JSON.stringify({ width: 400, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);
  }, 120_000);

  it("processes WebP input", async () => {
    const { readFileSync } = await import("node:fs");
    const { join } = await import("node:path");
    const WEBP = readFileSync(join(__dirname, "..", "fixtures", "test-50x50.webp"));
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.webp", contentType: "image/webp", content: WEBP },
      { name: "settings", content: JSON.stringify({ width: 40, protectFaces: false }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);
  }, 60_000);

  it("rejects width of 0", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ width: 0 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });

  it("rejects negative height", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      { name: "settings", content: JSON.stringify({ height: -50 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });

  it("handles square mode with width also specified", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
      {
        name: "settings",
        content: JSON.stringify({ square: true, width: 100, protectFaces: false }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect([200, 422]).toContain(res.statusCode);
  }, 60_000);

  it("rejects request without settings field", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/content-aware-resize",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    // No settings means no width/height/square => 400
    expect(res.statusCode).toBe(400);
  });
});