-- ============================================================
-- 每日報導 APP - 資料庫 Schema 設計
-- Database: MySQL 8.0+
-- Charset: utf8mb4
-- ============================================================

-- 建立資料庫
CREATE DATABASE IF NOT EXISTS daily_news_app 
CHARACTER SET utf8mb4 
COLLATE utf8mb4_unicode_ci;

USE daily_news_app;

-- ============================================================
-- 1. 用戶與權限相關
-- ============================================================

-- 1.1 角色表
CREATE TABLE roles (
    id INT PRIMARY KEY AUTO_INCREMENT,
    code VARCHAR(20) NOT NULL UNIQUE COMMENT '角色代碼: admin, editor, reader',
    name VARCHAR(50) NOT NULL COMMENT '角色名稱',
    description VARCHAR(200) COMMENT '角色描述',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) COMMENT='系統角色表';

-- 預設角色資料
INSERT INTO roles (code, name, description) VALUES
('admin', '系統管理員', 'LLM設定、AD整合、群組管理、用戶管理、系統設定'),
('editor', '市場分析專員', '新聞抓取管理、篩選編輯、報告發布、群組內容設定'),
('reader', '讀者', '訂閱群組、閱讀報告、留言討論、個人收藏、匯出PDF');

-- 1.2 用戶表
CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    username VARCHAR(50) NOT NULL UNIQUE COMMENT '用戶帳號',
    password_hash VARCHAR(255) COMMENT '密碼雜湊（本地帳號使用）',
    display_name VARCHAR(100) NOT NULL COMMENT '顯示名稱',
    email VARCHAR(100) COMMENT '電子郵件',
    auth_type ENUM('ad', 'local') NOT NULL DEFAULT 'local' COMMENT '認證類型',
    role_id INT NOT NULL COMMENT '角色ID',
    is_active BOOLEAN DEFAULT TRUE COMMENT '是否啟用',
    last_login_at TIMESTAMP NULL COMMENT '最後登入時間',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (role_id) REFERENCES roles(id)
) COMMENT='用戶表';

CREATE INDEX idx_users_username ON users(username);
CREATE INDEX idx_users_auth_type ON users(auth_type);

-- ============================================================
-- 2. 新聞來源與抓取相關
-- ============================================================

-- 2.1 新聞來源表
CREATE TABLE news_sources (
    id INT PRIMARY KEY AUTO_INCREMENT,
    code VARCHAR(30) NOT NULL UNIQUE COMMENT '來源代碼',
    name VARCHAR(100) NOT NULL COMMENT '來源名稱',
    base_url VARCHAR(255) NOT NULL COMMENT '網站基礎URL',
    source_type ENUM('subscription', 'public') NOT NULL COMMENT '來源類型：付費訂閱/公開',
    login_username VARCHAR(100) COMMENT '登入帳號（付費訂閱用）',
    login_password_encrypted VARCHAR(255) COMMENT '加密後密碼',
    is_active BOOLEAN DEFAULT TRUE COMMENT '是否啟用',
    crawl_config JSON COMMENT '爬蟲設定（選擇器、間隔等）',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) COMMENT='新聞來源表';

-- 預設新聞來源
INSERT INTO news_sources (code, name, base_url, source_type) VALUES
('digitimes', 'Digitimes', 'https://www.digitimes.com.tw', 'subscription'),
('udn', '經濟日報', 'https://money.udn.com', 'public'),
('ctee', '工商時報', 'https://ctee.com.tw', 'public');

-- 2.2 新聞文章表
CREATE TABLE news_articles (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    source_id INT NOT NULL COMMENT '來源ID',
    external_id VARCHAR(100) COMMENT '外部文章ID（防重複抓取）',
    title VARCHAR(500) NOT NULL COMMENT '文章標題',
    content LONGTEXT COMMENT '文章全文',
    summary TEXT COMMENT '原文摘要',
    url VARCHAR(500) NOT NULL COMMENT '原文連結',
    author VARCHAR(100) COMMENT '作者',
    published_at TIMESTAMP NULL COMMENT '發布時間',
    crawled_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '抓取時間',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (source_id) REFERENCES news_sources(id),
    UNIQUE KEY uk_source_external (source_id, external_id)
) COMMENT='新聞文章表';

CREATE INDEX idx_articles_published ON news_articles(published_at);
CREATE INDEX idx_articles_crawled ON news_articles(crawled_at);
CREATE FULLTEXT INDEX ft_articles_content ON news_articles(title, content);

-- 2.3 抓取任務記錄表
CREATE TABLE crawl_jobs (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    source_id INT NOT NULL COMMENT '來源ID',
    status ENUM('pending', 'running', 'completed', 'failed') DEFAULT 'pending',
    scheduled_at TIMESTAMP NOT NULL COMMENT '排程時間',
    started_at TIMESTAMP NULL COMMENT '開始時間',
    completed_at TIMESTAMP NULL COMMENT '完成時間',
    articles_count INT DEFAULT 0 COMMENT '抓取文章數',
    error_message TEXT COMMENT '錯誤訊息',
    retry_count INT DEFAULT 0 COMMENT '重試次數',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (source_id) REFERENCES news_sources(id)
) COMMENT='抓取任務記錄表';

CREATE INDEX idx_crawl_jobs_status ON crawl_jobs(status);
CREATE INDEX idx_crawl_jobs_scheduled ON crawl_jobs(scheduled_at);

-- ============================================================
-- 3. 群組與關鍵字相關
-- ============================================================

-- 3.1 群組表
CREATE TABLE groups (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL COMMENT '群組名稱',
    description TEXT COMMENT '群組描述',
    category ENUM('industry', 'topic') NOT NULL COMMENT '分類：產業別/議題',
    ai_background TEXT COMMENT 'AI背景資訊設定',
    ai_prompt TEXT COMMENT 'AI摘要方向提示',
    is_active BOOLEAN DEFAULT TRUE COMMENT '是否啟用',
    created_by INT COMMENT '建立者ID',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (created_by) REFERENCES users(id)
) COMMENT='群組表';

-- 3.2 關鍵字表
CREATE TABLE keywords (
    id INT PRIMARY KEY AUTO_INCREMENT,
    group_id INT NOT NULL COMMENT '所屬群組ID',
    keyword VARCHAR(100) NOT NULL COMMENT '關鍵字',
    is_active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE CASCADE,
    UNIQUE KEY uk_group_keyword (group_id, keyword)
) COMMENT='關鍵字表';

CREATE INDEX idx_keywords_keyword ON keywords(keyword);

-- 3.3 新聞-群組關聯表（根據關鍵字匹配）
CREATE TABLE article_group_matches (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    article_id BIGINT NOT NULL,
    group_id INT NOT NULL,
    matched_keywords JSON COMMENT '匹配到的關鍵字列表',
    match_score DECIMAL(5,2) COMMENT '匹配分數',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (article_id) REFERENCES news_articles(id) ON DELETE CASCADE,
    FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE CASCADE,
    UNIQUE KEY uk_article_group (article_id, group_id)
) COMMENT='新聞-群組匹配關聯表';

CREATE INDEX idx_matches_group ON article_group_matches(group_id);

-- ============================================================
-- 4. 報告相關
-- ============================================================

-- 4.1 報告表
CREATE TABLE reports (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    group_id INT NOT NULL COMMENT '所屬群組ID',
    title VARCHAR(200) NOT NULL COMMENT '報告標題',
    report_date DATE NOT NULL COMMENT '報告日期',
    ai_summary LONGTEXT COMMENT 'AI綜合摘要',
    edited_summary LONGTEXT COMMENT '編輯後摘要（專員修改版）',
    status ENUM('draft', 'pending', 'published', 'delayed') DEFAULT 'draft' COMMENT '狀態',
    published_at TIMESTAMP NULL COMMENT '發布時間',
    published_by INT COMMENT '發布者ID',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (group_id) REFERENCES groups(id),
    FOREIGN KEY (published_by) REFERENCES users(id),
    UNIQUE KEY uk_group_date (group_id, report_date)
) COMMENT='報告表';

CREATE INDEX idx_reports_status ON reports(status);
CREATE INDEX idx_reports_date ON reports(report_date);

-- 4.2 報告-新聞關聯表
CREATE TABLE report_articles (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    report_id BIGINT NOT NULL,
    article_id BIGINT NOT NULL,
    is_included BOOLEAN DEFAULT TRUE COMMENT '是否納入報告（專員篩選）',
    display_order INT DEFAULT 0 COMMENT '顯示順序',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (report_id) REFERENCES reports(id) ON DELETE CASCADE,
    FOREIGN KEY (article_id) REFERENCES news_articles(id),
    UNIQUE KEY uk_report_article (report_id, article_id)
) COMMENT='報告-新聞關聯表';

-- ============================================================
-- 5. 讀者互動相關
-- ============================================================

-- 5.1 訂閱表
CREATE TABLE subscriptions (
    id INT PRIMARY KEY AUTO_INCREMENT,
    user_id INT NOT NULL,
    group_id INT NOT NULL,
    email_notify BOOLEAN DEFAULT TRUE COMMENT '是否Email通知',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE CASCADE,
    UNIQUE KEY uk_user_group (user_id, group_id)
) COMMENT='訂閱表';

-- 5.2 收藏表
CREATE TABLE favorites (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    user_id INT NOT NULL,
    report_id BIGINT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (report_id) REFERENCES reports(id) ON DELETE CASCADE,
    UNIQUE KEY uk_user_report (user_id, report_id)
) COMMENT='收藏表';

-- 5.3 留言表
CREATE TABLE comments (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    report_id BIGINT NOT NULL,
    user_id INT NOT NULL,
    content TEXT NOT NULL COMMENT '留言內容',
    parent_id BIGINT COMMENT '父留言ID（回覆用）',
    is_deleted BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (report_id) REFERENCES reports(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (parent_id) REFERENCES comments(id)
) COMMENT='留言表';

CREATE INDEX idx_comments_report ON comments(report_id);

-- 5.4 個人筆記表
CREATE TABLE notes (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    user_id INT NOT NULL,
    report_id BIGINT NOT NULL,
    content TEXT NOT NULL COMMENT '筆記內容',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (report_id) REFERENCES reports(id) ON DELETE CASCADE
) COMMENT='個人筆記表';

CREATE INDEX idx_notes_user_report ON notes(user_id, report_id);

-- ============================================================
-- 6. 系統設定相關
-- ============================================================

-- 6.1 系統設定表
CREATE TABLE system_settings (
    id INT PRIMARY KEY AUTO_INCREMENT,
    setting_key VARCHAR(50) NOT NULL UNIQUE COMMENT '設定鍵',
    setting_value TEXT COMMENT '設定值',
    setting_type ENUM('string', 'number', 'boolean', 'json') DEFAULT 'string',
    description VARCHAR(200) COMMENT '設定描述',
    updated_by INT COMMENT '更新者ID',
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (updated_by) REFERENCES users(id)
) COMMENT='系統設定表';

-- 預設系統設定
INSERT INTO system_settings (setting_key, setting_value, setting_type, description) VALUES
('crawl_schedule_time', '08:00', 'string', '每日抓取排程時間'),
('publish_deadline', '09:00', 'string', '報告發布截止時間'),
('llm_provider', 'claude', 'string', 'LLM提供者: openai/claude/ollama'),
('llm_api_key_encrypted', '', 'string', '加密後的API Key'),
('llm_model', 'claude-3-sonnet', 'string', '使用的模型名稱'),
('llm_ollama_endpoint', 'http://localhost:11434', 'string', 'Ollama端點'),
('data_retention_days', '60', 'number', '資料保留天數'),
('pdf_logo_path', '', 'string', 'PDF Logo檔案路徑'),
('pdf_header_text', '', 'string', 'PDF頁首文字'),
('pdf_footer_text', '', 'string', 'PDF頁尾文字'),
('smtp_host', '', 'string', 'SMTP伺服器'),
('smtp_port', '587', 'number', 'SMTP埠號'),
('smtp_username', '', 'string', 'SMTP帳號'),
('smtp_password_encrypted', '', 'string', '加密後SMTP密碼'),
('smtp_from_email', '', 'string', '寄件者Email'),
('smtp_from_name', '每日報導系統', 'string', '寄件者名稱');

-- 6.2 操作日誌表
CREATE TABLE audit_logs (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    user_id INT COMMENT '操作用戶ID',
    action VARCHAR(50) NOT NULL COMMENT '操作類型',
    target_type VARCHAR(50) COMMENT '目標類型',
    target_id VARCHAR(50) COMMENT '目標ID',
    details JSON COMMENT '操作詳情',
    ip_address VARCHAR(45) COMMENT 'IP地址',
    user_agent VARCHAR(500) COMMENT 'User Agent',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id)
) COMMENT='操作日誌表';

CREATE INDEX idx_audit_user ON audit_logs(user_id);
CREATE INDEX idx_audit_action ON audit_logs(action);
CREATE INDEX idx_audit_created ON audit_logs(created_at);

-- 6.3 通知記錄表
CREATE TABLE notification_logs (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    user_id INT NOT NULL,
    report_id BIGINT COMMENT '關聯報告ID',
    notification_type ENUM('email', 'system') DEFAULT 'email',
    subject VARCHAR(200) COMMENT '通知標題',
    content TEXT COMMENT '通知內容',
    status ENUM('pending', 'sent', 'failed') DEFAULT 'pending',
    sent_at TIMESTAMP NULL,
    error_message TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (report_id) REFERENCES reports(id)
) COMMENT='通知記錄表';

CREATE INDEX idx_notification_status ON notification_logs(status);

-- ============================================================
-- 7. 資料清理事件（60天保留）
-- ============================================================

-- 建立事件排程器（需確保 event_scheduler=ON）
DELIMITER //

CREATE EVENT IF NOT EXISTS cleanup_old_data
ON SCHEDULE EVERY 1 DAY
STARTS CURRENT_TIMESTAMP
DO
BEGIN
    DECLARE retention_days INT DEFAULT 60;
    
    -- 取得設定的保留天數
    SELECT CAST(setting_value AS UNSIGNED) INTO retention_days 
    FROM system_settings 
    WHERE setting_key = 'data_retention_days';
    
    -- 刪除過期的新聞文章（會連帶刪除關聯資料）
    DELETE FROM news_articles 
    WHERE crawled_at < DATE_SUB(NOW(), INTERVAL retention_days DAY);
    
    -- 刪除過期的抓取任務記錄
    DELETE FROM crawl_jobs 
    WHERE created_at < DATE_SUB(NOW(), INTERVAL retention_days DAY);
    
    -- 刪除過期的操作日誌
    DELETE FROM audit_logs 
    WHERE created_at < DATE_SUB(NOW(), INTERVAL retention_days DAY);
    
    -- 刪除過期的通知記錄
    DELETE FROM notification_logs 
    WHERE created_at < DATE_SUB(NOW(), INTERVAL retention_days DAY);
END//

DELIMITER ;

-- ============================================================
-- 8. 視圖（View）- 常用查詢
-- ============================================================

-- 8.1 今日待審核報告視圖
CREATE VIEW v_pending_reports AS
SELECT 
    r.id,
    r.title,
    r.report_date,
    r.status,
    g.name AS group_name,
    g.category,
    COUNT(ra.id) AS article_count,
    SUM(CASE WHEN ra.is_included = TRUE THEN 1 ELSE 0 END) AS included_count
FROM reports r
JOIN groups g ON r.group_id = g.id
LEFT JOIN report_articles ra ON r.id = ra.report_id
WHERE r.report_date = CURDATE()
GROUP BY r.id;

-- 8.2 用戶訂閱群組視圖
CREATE VIEW v_user_subscriptions AS
SELECT 
    u.id AS user_id,
    u.display_name,
    u.email,
    g.id AS group_id,
    g.name AS group_name,
    g.category,
    s.email_notify
FROM users u
JOIN subscriptions s ON u.id = s.user_id
JOIN groups g ON s.group_id = g.id
WHERE u.is_active = TRUE AND g.is_active = TRUE;

-- 8.3 報告統計視圖
CREATE VIEW v_report_stats AS
SELECT 
    r.id AS report_id,
    r.title,
    r.report_date,
    r.status,
    g.name AS group_name,
    COUNT(DISTINCT f.user_id) AS favorite_count,
    COUNT(DISTINCT c.id) AS comment_count,
    COUNT(DISTINCT s.user_id) AS subscriber_count
FROM reports r
JOIN groups g ON r.group_id = g.id
LEFT JOIN favorites f ON r.id = f.report_id
LEFT JOIN comments c ON r.id = c.report_id AND c.is_deleted = FALSE
LEFT JOIN subscriptions s ON g.id = s.group_id
GROUP BY r.id;

-- ============================================================
-- END OF SCHEMA
-- ============================================================