{% extends "base.html" %}

{% block title %}PChome 爬蟲 - Momo Pro{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <div class="row mb-4">
        <div class="col">
            <h2><i class="fas fa-spider me-2"></i>PChome 24h 爬蟲</h2>
            <p class="text-muted">爬取 PChome 24h 商品資料</p>
        </div>
    </div>

    <!-- 爬取方式選擇 -->
    <div class="row mb-4">
        <div class="col-lg-6">
            <div class="card">
                <div class="card-header bg-primary text-white">
                    <i class="fas fa-folder-open me-2"></i>館別爬取
                </div>
                <div class="card-body">
                    <div class="mb-3">
                        <label class="form-label">選擇館別分類</label>
                        <select class="form-select" id="categorySelect">
                            <option value="">-- 選擇分類 --</option>
                        </select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">選擇館別</label>
                        <select class="form-select" id="regionSelect" disabled>
                            <option value="">-- 先選擇分類 --</option>
                        </select>
                    </div>
                    <button class="btn btn-primary" id="crawlRegionBtn" disabled>
                        <i class="fas fa-download me-1"></i>開始爬取
                    </button>
                </div>
            </div>
        </div>
        <div class="col-lg-6">
            <div class="card">
                <div class="card-header bg-success text-white">
                    <i class="fas fa-search me-2"></i>關鍵字搜尋
                </div>
                <div class="card-body">
                    <div class="mb-3">
                        <label class="form-label">搜尋關鍵字</label>
                        <input type="text" class="form-control" id="searchKeyword" placeholder="輸入商品關鍵字...">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">最多筆數</label>
                        <select class="form-select" id="searchLimit">
                            <option value="20">20 筆</option>
                            <option value="50" selected>50 筆</option>
                            <option value="100">100 筆</option>
                        </select>
                    </div>
                    <button class="btn btn-success" id="searchBtn">
                        <i class="fas fa-search me-1"></i>搜尋
                    </button>
                </div>
            </div>
        </div>
    </div>

    <!-- 自訂 URL -->
    <div class="row mb-4">
        <div class="col">
            <div class="card">
                <div class="card-header bg-info text-white">
                    <i class="fas fa-link me-2"></i>自訂 URL 爬取
                </div>
                <div class="card-body">
                    <div class="row align-items-end">
                        <div class="col-lg-9 mb-2 mb-lg-0">
                            <label class="form-label">PChome 24h 頁面 URL</label>
                            <input type="url" class="form-control" id="customUrl"
                                   placeholder="https://24h.pchome.com.tw/region/DDAB">
                        </div>
                        <div class="col-lg-3">
                            <button class="btn btn-info w-100" id="crawlCustomBtn">
                                <i class="fas fa-download me-1"></i>爬取
                            </button>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- 爬取進度 -->
    <div class="row mb-4" id="progressSection" style="display: none;">
        <div class="col">
            <div class="card">
                <div class="card-body">
                    <div class="d-flex align-items-center">
                        <div class="spinner-border text-primary me-3" role="status">
                            <span class="visually-hidden">載入中...</span>
                        </div>
                        <div>
                            <strong id="progressText">正在爬取...</strong>
                            <br>
                            <small class="text-muted" id="progressDetail">請稍候</small>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- 結果區域 -->
    <div class="row" id="resultSection" style="display: none;">
        <div class="col">
            <div class="card">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <span><i class="fas fa-list me-2"></i>爬取結果 (<span id="resultCount">0</span> 筆)</span>
                    <div>
                        <button class="btn btn-sm btn-outline-primary me-2" id="exportExcelBtn">
                            <i class="fas fa-file-excel me-1"></i>匯出 Excel
                        </button>
                        <button class="btn btn-sm btn-outline-secondary" id="exportJsonBtn">
                            <i class="fas fa-file-code me-1"></i>匯出 JSON
                        </button>
                    </div>
                </div>
                <div class="card-body">
                    <div class="table-responsive">
                        <table class="table table-hover table-striped" id="resultTable">
                            <thead class="table-dark">
                                <tr>
                                    <th style="width: 80px;">圖片</th>
                                    <th>商品名稱</th>
                                    <th style="width: 100px;">售價</th>
                                    <th style="width: 100px;">原價</th>
                                    <th style="width: 80px;">折扣</th>
                                    <th style="width: 80px;">庫存</th>
                                    <th style="width: 100px;">操作</th>
                                </tr>
                            </thead>
                            <tbody id="resultBody">
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
    let regionsData = {};
    let categoriesData = {};
    let currentProducts = [];

    document.addEventListener('DOMContentLoaded', function() {
        loadRegions();
        bindEvents();
    });

    async function loadRegions() {
        try {
            const response = await fetch('/api/pchome/regions');
            const data = await response.json();

            if (data.success) {
                regionsData = data.data.regions;
                categoriesData = data.data.categories;

                // 填充分類下拉選單
                const categorySelect = document.getElementById('categorySelect');
                for (const cat of Object.keys(categoriesData)) {
                    const option = document.createElement('option');
                    option.value = cat;
                    option.textContent = cat;
                    categorySelect.appendChild(option);
                }
            }
        } catch (error) {
            console.error('載入館別失敗:', error);
        }
    }

    function bindEvents() {
        // 分類選擇變更
        document.getElementById('categorySelect').addEventListener('change', function() {
            const category = this.value;
            const regionSelect = document.getElementById('regionSelect');
            const crawlBtn = document.getElementById('crawlRegionBtn');

            regionSelect.innerHTML = '<option value="">-- 選擇館別 --</option>';

            if (category && categoriesData[category]) {
                for (const region of categoriesData[category]) {
                    const option = document.createElement('option');
                    option.value = region.code;
                    option.textContent = `${region.code} - ${region.name}`;
                    regionSelect.appendChild(option);
                }
                regionSelect.disabled = false;
            } else {
                regionSelect.disabled = true;
            }
            crawlBtn.disabled = true;
        });

        // 館別選擇變更
        document.getElementById('regionSelect').addEventListener('change', function() {
            document.getElementById('crawlRegionBtn').disabled = !this.value;
        });

        // 館別爬取
        document.getElementById('crawlRegionBtn').addEventListener('click', crawlRegion);

        // 搜尋
        document.getElementById('searchBtn').addEventListener('click', searchProducts);
        document.getElementById('searchKeyword').addEventListener('keypress', function(e) {
            if (e.key === 'Enter') searchProducts();
        });

        // 自訂 URL 爬取
        document.getElementById('crawlCustomBtn').addEventListener('click', crawlCustomUrl);

        // 匯出
        document.getElementById('exportExcelBtn').addEventListener('click', exportExcel);
        document.getElementById('exportJsonBtn').addEventListener('click', exportJson);
    }

    async function crawlRegion() {
        const regionCode = document.getElementById('regionSelect').value;
        if (!regionCode) return;

        const regionName = regionsData[regionCode]?.name || regionCode;
        showProgress(`正在爬取 ${regionName}...`, '取得商品列表中');

        try {
            const response = await fetch('/api/pchome/crawl/region', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ region_code: regionCode })
            });

            const data = await response.json();
            hideProgress();

            if (data.success) {
                currentProducts = data.data.products;
                showResults(currentProducts);
                showToast(`成功爬取 ${currentProducts.length} 個商品`, 'success');
            } else {
                showToast(data.message, 'danger');
            }
        } catch (error) {
            hideProgress();
            showToast('爬取失敗: ' + error.message, 'danger');
        }
    }

    async function searchProducts() {
        const keyword = document.getElementById('searchKeyword').value.trim();
        if (!keyword) {
            showToast('請輸入搜尋關鍵字', 'warning');
            return;
        }

        const limit = parseInt(document.getElementById('searchLimit').value);
        showProgress(`搜尋 "${keyword}"...`, '查詢中');

        try {
            const response = await fetch('/api/pchome/search', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ keyword, limit })
            });

            const data = await response.json();
            hideProgress();

            if (data.success) {
                currentProducts = data.data.products;
                showResults(currentProducts);
                showToast(`找到 ${currentProducts.length} 個商品`, 'success');
            } else {
                showToast(data.message, 'danger');
            }
        } catch (error) {
            hideProgress();
            showToast('搜尋失敗: ' + error.message, 'danger');
        }
    }

    async function crawlCustomUrl() {
        const url = document.getElementById('customUrl').value.trim();
        if (!url) {
            showToast('請輸入 URL', 'warning');
            return;
        }

        if (!url.startsWith('https://24h.pchome.com.tw/')) {
            showToast('僅支援 PChome 24h 網站', 'warning');
            return;
        }

        showProgress(`爬取 URL...`, url);

        try {
            const response = await fetch('/api/pchome/crawl/custom', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ url })
            });

            const data = await response.json();
            hideProgress();

            if (data.success) {
                currentProducts = data.data.products;
                showResults(currentProducts);
                showToast(`成功爬取 ${currentProducts.length} 個商品`, 'success');
            } else {
                showToast(data.message, 'danger');
            }
        } catch (error) {
            hideProgress();
            showToast('爬取失敗: ' + error.message, 'danger');
        }
    }

    function showProgress(title, detail) {
        document.getElementById('progressText').textContent = title;
        document.getElementById('progressDetail').textContent = detail;
        document.getElementById('progressSection').style.display = 'block';
        document.getElementById('resultSection').style.display = 'none';
    }

    function hideProgress() {
        document.getElementById('progressSection').style.display = 'none';
    }

    function showResults(products) {
        document.getElementById('resultCount').textContent = products.length;
        document.getElementById('resultSection').style.display = 'block';

        const tbody = document.getElementById('resultBody');
        tbody.innerHTML = '';

        for (const p of products) {
            const discount = p.discount ? `<span class="badge bg-danger">-${p.discount}%</span>` : '-';
            const stockBadge = p.stock > 0
                ? `<span class="badge bg-success">${p.stock}</span>`
                : `<span class="badge bg-secondary">缺貨</span>`;

            const row = document.createElement('tr');
            row.innerHTML = `
                <td>
                    <img src="${p.image_url}?width=80" alt="" class="img-thumbnail"
                         style="width: 60px; height: 60px; object-fit: cover;"
                         onerror="this.src='/static/images/no-image.png'">
                </td>
                <td>
                    <a href="${p.product_url}" target="_blank" class="text-decoration-none">
                        ${escapeHtml(p.name.substring(0, 50))}${p.name.length > 50 ? '...' : ''}
                    </a>
                    <br>
                    <small class="text-muted">${p.product_id}</small>
                </td>
                <td class="text-danger fw-bold">$${p.price.toLocaleString()}</td>
                <td class="text-muted"><s>$${p.original_price.toLocaleString()}</s></td>
                <td>${discount}</td>
                <td>${stockBadge}</td>
                <td>
                    <a href="${p.product_url}" target="_blank" class="btn btn-sm btn-outline-primary">
                        <i class="fas fa-external-link-alt"></i>
                    </a>
                </td>
            `;
            tbody.appendChild(row);
        }
    }

    function exportExcel() {
        if (!currentProducts.length) {
            showToast('沒有資料可匯出', 'warning');
            return;
        }

        // 建立 CSV
        const headers = ['商品ID', '名稱', '售價', '原價', '折扣%', '庫存', '圖片URL', '商品URL'];
        const rows = currentProducts.map(p => [
            p.product_id,
            `"${p.name.replace(/"/g, '""')}"`,
            p.price,
            p.original_price,
            p.discount || '',
            p.stock,
            p.image_url,
            p.product_url
        ]);

        const csv = '\uFEFF' + [headers.join(','), ...rows.map(r => r.join(','))].join('\n');
        downloadFile(csv, 'pchome_products.csv', 'text/csv;charset=utf-8');
    }

    function exportJson() {
        if (!currentProducts.length) {
            showToast('沒有資料可匯出', 'warning');
            return;
        }

        const json = JSON.stringify(currentProducts, null, 2);
        downloadFile(json, 'pchome_products.json', 'application/json');
    }

    function downloadFile(content, filename, type) {
        const blob = new Blob([content], { type });
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        a.click();
        URL.revokeObjectURL(url);
    }

    function escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    function showToast(message, type = 'info') {
        // 簡易 Toast
        const toast = document.createElement('div');
        toast.className = `alert alert-${type} position-fixed`;
        toast.style.cssText = 'top: 20px; right: 20px; z-index: 9999; min-width: 300px;';
        toast.innerHTML = `
            <button type="button" class="btn-close float-end" onclick="this.parentElement.remove()"></button>
            ${message}
        `;
        document.body.appendChild(toast);
        setTimeout(() => toast.remove(), 5000);
    }
</script>
{% endblock %}