/**
 * WooCow – Admin JavaScript
 */
(function ($) {
    'use strict';

    const ajax = (action, data) =>
        $.post(woocow.ajax_url, { action, nonce: woocow.nonce, ...data });

    const notice = ($el, type, msg, autohide = true) => {
        $el.html(`<div class="notice notice-${type} is-dismissible"><p>${msg}</p></div>`);
        if (autohide) setTimeout(() => $el.find('.notice').fadeOut(), 4000);
    };

    // ── Servers Page ──────────────────────────────────────────────────────────

    if ($('#wc-servers-table-wrap').length) {
        let editId = 0;

        const loadServers = () => {
            ajax('woocow_servers_list').done(res => {
                if (!res.success) return;
                const rows = res.data;
                if (!rows.length) {
                    $('#wc-servers-table-wrap').html('<p>No servers yet. Add one above.</p>');
                    return;
                }
                let html = `<table class="wp-list-table widefat fixed striped woocow-table">
                    <thead><tr>
                        <th>Name</th><th>URL</th><th>Status</th><th>Added</th><th>Actions</th>
                    </tr></thead><tbody>`;
                rows.forEach(s => {
                    const badge = s.active == 1
                        ? '<span class="woocow-badge woocow-badge-green">Active</span>'
                        : '<span class="woocow-badge woocow-badge-grey">Inactive</span>';
                    html += `<tr data-id="${s.id}" data-name="${esc(s.name)}" data-url="${esc(s.url)}">
                        <td><strong>${esc(s.name)}</strong></td>
                        <td><a href="${esc(s.url)}" target="_blank" rel="noopener">${esc(s.url)}</a></td>
                        <td>${badge}</td>
                        <td>${s.created_at.split(' ')[0]}</td>
                        <td class="woocow-actions">
                            <button class="button button-small wc-srv-edit" data-id="${s.id}">Edit</button>
                            <button class="button button-small wc-srv-test" data-id="${s.id}">Test</button>
                            <button class="button button-small wc-srv-del" data-id="${s.id}" style="color:#a00">Delete</button>
                        </td>
                    </tr>`;
                });
                html += '</tbody></table>';
                $('#wc-servers-table-wrap').html(html);
                $('#wc-servers-loading').hide();
            });
        };

        loadServers();

        // Show add form
        $('#wc-add-server').on('click', () => {
            editId = 0;
            $('#wc-server-id').val('');
            $('#wc-server-name, #wc-server-url, #wc-server-key').val('');
            $('#wc-server-active').prop('checked', true);
            $('#wc-server-form-title').text('Add Server');
            $('#wc-server-form').slideDown();
        });

        // Edit row
        $(document).on('click', '.wc-srv-edit', function () {
            editId = $(this).data('id');
            const $row = $(this).closest('tr');
            $('#wc-server-id').val(editId);
            $('#wc-server-name').val($row.data('name'));
            $('#wc-server-url').val($row.data('url'));
            $('#wc-server-key').val('');
            $('#wc-server-active').prop('checked', true);
            $('#wc-server-form-title').text('Edit Server');
            $('#wc-server-form').slideDown();
            $('html, body').animate({ scrollTop: 0 }, 300);
        });

        // Save
        $('#wc-server-save').on('click', () => {
            const data = {
                id:      $('#wc-server-id').val(),
                name:    $('#wc-server-name').val().trim(),
                url:     $('#wc-server-url').val().trim(),
                api_key: $('#wc-server-key').val().trim(),
                active:  $('#wc-server-active').is(':checked') ? 1 : 0,
            };
            if (!data.name || !data.url || (!data.api_key && !editId)) {
                notice($('#wc-notices'), 'error', 'Please fill in all required fields.');
                return;
            }
            ajax('woocow_server_save', data).done(res => {
                if (res.success) {
                    notice($('#wc-notices'), 'success', 'Server saved.');
                    $('#wc-server-form').slideUp();
                    loadServers();
                } else {
                    notice($('#wc-notices'), 'error', res.data || 'Save failed.');
                }
            });
        });

        // Test connection
        $('#wc-server-test').on('click', () => {
            const $result = $('#wc-server-test-result').text('Testing…');
            ajax('woocow_server_test', {
                id:      $('#wc-server-id').val(),
                url:     $('#wc-server-url').val().trim(),
                api_key: $('#wc-server-key').val().trim(),
            }).done(res => {
                if (res.success) {
                    $result.html(`<span style="color:green">✓ Connected – Mailcow ${esc(res.data.version)}</span>`);
                } else {
                    $result.html(`<span style="color:red">✗ ${esc(res.data)}</span>`);
                }
            });
        });

        // Test from row
        $(document).on('click', '.wc-srv-test', function () {
            const id  = $(this).data('id');
            const $td = $(this).closest('td');
            $td.append('<span class="wc-inline-test"> Testing…</span>');
            ajax('woocow_server_test', { id }).done(res => {
                $td.find('.wc-inline-test').html(
                    res.success
                        ? `<span style="color:green"> ✓ v${esc(res.data.version)}</span>`
                        : `<span style="color:red"> ✗ ${esc(res.data)}</span>`
                );
            });
        });

        // Delete
        $(document).on('click', '.wc-srv-del', function () {
            if (!confirm('Delete this server? All domain assignments for it will also be removed.')) return;
            ajax('woocow_server_delete', { id: $(this).data('id') }).done(res => {
                if (res.success) loadServers();
                else notice($('#wc-notices'), 'error', res.data);
            });
        });

        $('#wc-server-cancel').on('click', () => $('#wc-server-form').slideUp());
    }

    // ── Assignments Page ──────────────────────────────────────────────────────

    if ($('#wc-assignments-table-wrap').length) {

        const loadAssignments = () => {
            ajax('woocow_assignments_list').done(res => {
                if (!res.success) return;
                const rows = res.data;
                if (!rows.length) {
                    $('#wc-assignments-table-wrap').html('<p>No assignments yet.</p>');
                    $('#wc-assignments-loading').hide();
                    return;
                }
                let html = `<table class="wp-list-table widefat fixed striped woocow-table">
                    <thead><tr>
                        <th>Customer</th><th>Email</th><th>Domain</th><th>Server</th><th>Assigned</th><th>Actions</th>
                    </tr></thead><tbody>`;
                rows.forEach(r => {
                    html += `<tr>
                        <td>${esc(r.display_name)}</td>
                        <td>${esc(r.user_email)}</td>
                        <td><strong>${esc(r.domain)}</strong></td>
                        <td>${esc(r.server_name)}</td>
                        <td>${r.created_at.split(' ')[0]}</td>
                        <td><button class="button button-small wc-assign-del" data-id="${r.id}" style="color:#a00">Remove</button></td>
                    </tr>`;
                });
                html += '</tbody></table>';
                $('#wc-assignments-table-wrap').html(html);
                $('#wc-assignments-loading').hide();
            });
        };

        // Load servers into select
        ajax('woocow_servers_list').done(res => {
            if (!res.success) return;
            res.data.filter(s => s.active == 1).forEach(s => {
                $('#wc-assign-server').append(`<option value="${s.id}">${esc(s.name)}</option>`);
            });
        });

        // Server → load domains
        $('#wc-assign-server').on('change', function () {
            const sid = $(this).val();
            $('#wc-assign-domain').html('<option value="">— Loading —</option>');
            if (!sid) { $('#wc-domain-row').hide(); return; }
            ajax('woocow_server_domains', { server_id: sid }).done(res => {
                if (!res.success) {
                    alert('Could not load domains: ' + res.data);
                    return;
                }
                $('#wc-assign-domain').html('<option value="">— Select domain —</option>');
                res.data.forEach(d => {
                    $('#wc-assign-domain').append(`<option value="${esc(d.domain)}">${esc(d.domain)}</option>`);
                });
                $('#wc-domain-row').show();
            });
        });

        // Customer autocomplete
        let searchTimer;
        $('#wc-cust-search').on('input', function () {
            clearTimeout(searchTimer);
            const term = $(this).val().trim();
            if (term.length < 2) { $('#wc-cust-results').hide(); return; }
            searchTimer = setTimeout(() => {
                ajax('woocow_customers_search', { term }).done(res => {
                    if (!res.success || !res.data.length) { $('#wc-cust-results').hide(); return; }
                    let html = '';
                    res.data.forEach(c => {
                        html += `<div class="woocow-ac-item" data-id="${c.id}" data-label="${esc(c.label)}">${esc(c.label)}</div>`;
                    });
                    $('#wc-cust-results').html(html).show();
                });
            }, 250);
        });

        $(document).on('click', '.woocow-ac-item', function () {
            $('#wc-cust-id').val($(this).data('id'));
            $('#wc-cust-search').val('');
            $('#wc-cust-selected').text($(this).data('label'));
            $('#wc-cust-results').hide();
        });

        $(document).on('click', function (e) {
            if (!$(e.target).closest('#wc-cust-results, #wc-cust-search').length) {
                $('#wc-cust-results').hide();
            }
        });

        // Save assignment
        $('#wc-assign-save').on('click', () => {
            const customer_id = $('#wc-cust-id').val();
            const server_id   = $('#wc-assign-server').val();
            const domain      = $('#wc-assign-domain').val();
            if (!customer_id || !server_id || !domain) {
                notice($('#wc-assign-notice'), 'error', 'Please select a customer, server, and domain.');
                return;
            }
            ajax('woocow_assignment_save', { customer_id, server_id, domain }).done(res => {
                if (res.success) {
                    notice($('#wc-assign-notice'), 'success', `Domain <strong>${esc(domain)}</strong> assigned.`);
                    $('#wc-cust-id').val('');
                    $('#wc-cust-selected').text('');
                    loadAssignments();
                } else {
                    notice($('#wc-assign-notice'), 'error', res.data);
                }
            });
        });

        // Delete assignment
        $(document).on('click', '.wc-assign-del', function () {
            if (!confirm('Remove this domain assignment?')) return;
            ajax('woocow_assignment_delete', { id: $(this).data('id') }).done(res => {
                if (res.success) loadAssignments();
            });
        });

        loadAssignments();
    }

    // ── Mailboxes Page ────────────────────────────────────────────────────────

    if ($('#wc-mb-table-wrap').length) {
        let currentServerId = null;
        let currentDomain   = null;

        // Server → load domains
        $('#wc-mb-server').on('change', function () {
            const sid = $(this).val();
            $('#wc-mb-domain').hide().html('<option value="">— Select domain —</option>');
            $('#wc-mb-load').prop('disabled', true);
            if (!sid) return;
            ajax('woocow_server_domains', { server_id: sid }).done(res => {
                if (!res.success) return;
                res.data.forEach(d => {
                    $('#wc-mb-domain').append(`<option value="${esc(d.domain)}">${esc(d.domain)}</option>`);
                });
                $('#wc-mb-domain').show();
            });
        });

        $('#wc-mb-domain').on('change', function () {
            $('#wc-mb-load').prop('disabled', !$(this).val());
        });

        const loadMailboxes = () => {
            currentServerId = $('#wc-mb-server').val();
            currentDomain   = $('#wc-mb-domain').val();
            if (!currentServerId || !currentDomain) return;

            $('#wc-mb-table-wrap').html('<p>Loading…</p>');
            ajax('woocow_admin_mailboxes', { server_id: currentServerId, domain: currentDomain }).done(res => {
                if (!res.success) {
                    $('#wc-mb-table-wrap').html(`<div class="notice notice-error"><p>${esc(res.data)}</p></div>`);
                    return;
                }
                const boxes = res.data.mailboxes || [];
                const webmail = res.data.webmail_url;

                if (!boxes.length) {
                    $('#wc-mb-table-wrap').html('<p>No mailboxes found for this domain.</p>');
                } else {
                    let html = `<table class="wp-list-table widefat fixed striped woocow-table">
                        <thead><tr>
                            <th>Email</th><th>Name</th><th>Quota Used</th><th>Quota Max</th><th>Active</th><th>Actions</th>
                        </tr></thead><tbody>`;
                    boxes.forEach(m => {
                        const pct    = m.percent_in_use || 0;
                        const used   = formatMB(m.quota_used);
                        const max    = formatMB(m.quota);
                        const bar    = `<div class="woocow-quota-bar"><div style="width:${pct}%"></div></div>`;
                        const quotaMB = Math.round((m.quota || 0) / 1024 / 1024);
                        html += `<tr>
                            <td><a href="${esc(webmail)}" target="_blank">${esc(m.username)}</a></td>
                            <td>${esc(m.name)}</td>
                            <td>${used} ${bar}</td>
                            <td>${max}</td>
                            <td>${m.active == 1 ? '✓' : '–'}</td>
                            <td class="woocow-actions">
                                <button class="button button-small wc-mb-reset-pw"
                                    data-email="${esc(m.username)}">Reset PW</button>
                                <button class="button button-small wc-mb-set-quota"
                                    data-email="${esc(m.username)}" data-quota="${quotaMB}">Set Quota</button>
                                <button class="button button-small wc-mb-del"
                                    data-email="${esc(m.username)}" style="color:#a00">Delete</button>
                            </td>
                        </tr>`;
                    });
                    html += '</tbody></table>';
                    $('#wc-mb-table-wrap').html(html);
                }

                $('#wc-mb-domain-label').text(currentDomain);
                $('#wc-mb-create').show();
            });
        };

        $('#wc-mb-load').on('click', loadMailboxes);

        // Create mailbox modal
        $('#wc-mb-create').on('click', () => {
            $('#wc-mb-local, #wc-mb-fullname, #wc-mb-pass, #wc-mb-pass2').val('');
            $('#wc-mb-quota').val(1024);
            $('#wc-mb-modal-notice').text('');
            $('#wc-mb-modal').show();
        });
        $('#wc-mb-modal-cancel').on('click', () => $('#wc-mb-modal').hide());
        $(document).on('keydown', e => { if (e.key === 'Escape') $('#wc-mb-modal').hide(); });

        $('#wc-mb-modal-save').on('click', () => {
            const data = {
                server_id:  currentServerId,
                domain:     currentDomain,
                local_part: $('#wc-mb-local').val().trim(),
                name:       $('#wc-mb-fullname').val().trim(),
                password:   $('#wc-mb-pass').val(),
                password2:  $('#wc-mb-pass2').val(),
                quota:      $('#wc-mb-quota').val(),
            };
            $('#wc-mb-modal-notice').text('Creating…');
            ajax('woocow_admin_mailbox_create', data).done(res => {
                if (res.success) {
                    $('#wc-mb-modal').hide();
                    notice($('#wc-mb-notices'), 'success', `Mailbox <strong>${esc(res.data.email)}</strong> created.`);
                    loadMailboxes();
                } else {
                    $('#wc-mb-modal-notice').html(`<span style="color:red">${esc(res.data)}</span>`);
                }
            });
        });

        // Delete mailbox
        $(document).on('click', '.wc-mb-del', function () {
            const email = $(this).data('email');
            if (!confirm(`Delete mailbox ${email}? This cannot be undone.`)) return;
            ajax('woocow_admin_mailbox_delete', { server_id: currentServerId, email }).done(res => {
                if (res.success) loadMailboxes();
                else notice($('#wc-mb-notices'), 'error', res.data);
            });
        });

        // ── Edit modal: Reset PW ──────────────────────────────────────────────

        let editEmail = '';
        let editType  = '';

        const openEditModal = (email, type, currentQuota) => {
            editEmail = email;
            editType  = type;
            $('#wc-mb-edit-subtitle').text(email);
            $('#wc-mb-edit-notice').text('');
            $('#wc-mb-edit-pw-section, #wc-mb-edit-quota-section').hide();

            if (type === 'password') {
                $('#wc-mb-edit-title').text('Reset Password');
                $('#wc-mb-edit-pass, #wc-mb-edit-pass2').val('');
                $('#wc-mb-edit-pw-section').show();
                setTimeout(() => $('#wc-mb-edit-pass').trigger('focus'), 100);
            } else {
                $('#wc-mb-edit-title').text('Set Quota');
                $('#wc-mb-edit-quota').val(currentQuota || 1024);
                $('#wc-mb-edit-quota-section').show();
                setTimeout(() => $('#wc-mb-edit-quota').trigger('focus'), 100);
            }
            $('#wc-mb-edit-modal').show();
        };

        $(document).on('click', '.wc-mb-reset-pw', function () {
            openEditModal($(this).data('email'), 'password', null);
        });

        $(document).on('click', '.wc-mb-set-quota', function () {
            openEditModal($(this).data('email'), 'quota', $(this).data('quota'));
        });

        $('#wc-mb-edit-cancel').on('click', () => $('#wc-mb-edit-modal').hide());
        $(document).on('keydown', e => { if (e.key === 'Escape') $('#wc-mb-edit-modal').hide(); });

        $('#wc-mb-edit-save').on('click', () => {
            const $note = $('#wc-mb-edit-notice').text('Saving…');
            const data  = { server_id: currentServerId, email: editEmail, type: editType };

            if (editType === 'password') {
                data.password  = $('#wc-mb-edit-pass').val();
                data.password2 = $('#wc-mb-edit-pass2').val();
                if (!data.password) { $note.html('<span style="color:red">Password cannot be empty.</span>'); return; }
                if (data.password !== data.password2) { $note.html('<span style="color:red">Passwords do not match.</span>'); return; }
            } else {
                data.quota = $('#wc-mb-edit-quota').val();
                if (!data.quota || data.quota < 1) { $note.html('<span style="color:red">Enter a valid quota.</span>'); return; }
            }

            ajax('woocow_admin_mailbox_edit', data).done(res => {
                if (res.success) {
                    $('#wc-mb-edit-modal').hide();
                    const msg = editType === 'password' ? 'Password updated.' : 'Quota updated.';
                    notice($('#wc-mb-notices'), 'success', `<strong>${esc(editEmail)}</strong> — ${msg}`);
                    if (editType === 'quota') loadMailboxes(); // refresh to show new quota
                } else {
                    $note.html(`<span style="color:red">${esc(res.data)}</span>`);
                }
            });
        });
    }

    // ── Utilities ─────────────────────────────────────────────────────────────

    function esc(str) {
        return String(str).replace(/[&<>"']/g, m => ({
            '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;'
        })[m]);
    }

    function formatMB(bytes) {
        if (!bytes) return '0 MB';
        const mb = bytes / 1024 / 1024;
        return mb >= 1024 ? (mb / 1024).toFixed(1) + ' GB' : mb.toFixed(0) + ' MB';
    }

})(jQuery);