-- 周报元数据表（用于快速查询和统计）
-- 2026-08-27 创建

CREATE TABLE IF NOT EXISTS `weekly_reports` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `year` INT NOT NULL COMMENT '年份',
  `week_number` INT NOT NULL COMMENT '周数 (1-53)',
  `start_date` DATE NOT NULL COMMENT '周一日期',
  `end_date` DATE NOT NULL COMMENT '周五日期',
  `project` VARCHAR(50) NOT NULL COMMENT '项目名称 (如 G5/G6)',
  `main_task` VARCHAR(500) COMMENT '本周主要任务',
  `file_path` VARCHAR(255) NOT NULL COMMENT '归档文件路径',
  `has_problems` TINYINT(1) DEFAULT 0 COMMENT '是否存在问题',
  `word_count` INT DEFAULT 0 COMMENT '字数统计',
  `created_at` DATETIME DEFAULT CURRENT_TIMESTAMP,
  `updated_at` DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_year_week` (`year`, `week_number`, `project`),
  KEY `idx_date` (`start_date`, `end_date`),
  KEY `idx_project` (`project`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='周报元数据表';

-- 周报每日工作明细表（可选，用于更细粒度的查询）
CREATE TABLE IF NOT EXISTS `weekly_report_daily` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `report_id` INT NOT NULL COMMENT '周报 ID',
  `day_of_week` TINYINT NOT NULL COMMENT '星期几 (1-5)',
  `work_date` DATE NOT NULL COMMENT '具体日期',
  `work_items` TEXT COMMENT '工作内容列表 (JSON 数组或换行分隔)',
  `created_at` DATETIME DEFAULT CURRENT_TIMESTAMP,
  
  PRIMARY KEY (`id`),
  KEY `idx_report` (`report_id`),
  KEY `idx_date` (`work_date`),
  CONSTRAINT `fk_report` FOREIGN KEY (`report_id`) REFERENCES `weekly_reports` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='周报每日工作明细表';

-- 周报问题记录表（可选，用于问题追踪）
CREATE TABLE IF NOT EXISTS `weekly_report_problems` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `report_id` INT NOT NULL COMMENT '周报 ID',
  `problem_description` TEXT NOT NULL COMMENT '问题描述',
  `status` VARCHAR(20) DEFAULT 'open' COMMENT '状态：open/resolved/closed',
  `resolved_at` DATETIME NULL COMMENT '解决时间',
  `created_at` DATETIME DEFAULT CURRENT_TIMESTAMP,
  
  PRIMARY KEY (`id`),
  KEY `idx_report` (`report_id`),
  CONSTRAINT `fk_problem_report` FOREIGN KEY (`report_id`) REFERENCES `weekly_reports` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='周报问题记录表';

-- 示例数据
INSERT INTO `weekly_reports` (`year`, `week_number`, `start_date`, `end_date`, `project`, `main_task`, `file_path`, `has_problems`, `word_count`)
VALUES 
  (2026, 29, '2026-07-14', '2026-07-18', 'G5', '库存预警模块开发', 'weekly-reports/2026/2026-W29.md', 0, 500),
  (2026, 31, '2026-07-28', '2026-08-01', 'G5', '委外发料需求开发', 'weekly-reports/2026/2026-W31-周报.md', 0, 600);

-- 常用查询示例

-- 1. 查询某年所有周报
SELECT * FROM weekly_reports WHERE year = 2026 ORDER BY week_number;

-- 2. 查询某月所有周报
SELECT * FROM weekly_reports 
WHERE start_date >= '2026-08-01' AND end_date <= '2026-08-31'
ORDER BY start_date;

-- 3. 统计某项目全年周报数量
SELECT project, COUNT(*) as report_count 
FROM weekly_reports 
WHERE year = 2026 
GROUP BY project;

-- 4. 查询存在问题的周报
SELECT * FROM weekly_reports WHERE has_problems = 1;

-- 5. 查询某时间范围的工作天数
SELECT SUM(day_of_week) as total_days 
FROM weekly_report_daily 
WHERE work_date BETWEEN '2026-07-01' AND '2026-09-30';

-- 6. 月度统计（用于考核）
SELECT 
  YEAR(start_date) as year,
  MONTH(start_date) as month,
  project,
  COUNT(*) as weeks_count,
  SUM(has_problems) as problem_weeks,
  AVG(word_count) as avg_words
FROM weekly_reports
WHERE start_date >= '2026-08-01' AND start_date <= '2026-08-31'
GROUP BY YEAR(start_date), MONTH(start_date), project;