-- 重建预测市场表（完全删除后重新创建）
-- 警告：会删除所有现有数据！
-- 仅在测试环境或数据可以丢失时使用
-- 执行前请备份数据库！

USE stock;

-- 删除旧表（按依赖关系倒序删除）
DROP TABLE IF EXISTS time_slot_bid;
DROP TABLE IF EXISTS time_capsule_time_slot;
DROP TABLE IF EXISTS time_capsule_topic;
DROP TABLE IF EXISTS comment_position_bid;
DROP TABLE IF EXISTS comment_investment;
DROP TABLE IF EXISTS topic_comment;
DROP TABLE IF EXISTS prediction_transaction;
DROP TABLE IF EXISTS prediction_position;
DROP TABLE IF EXISTS prediction_topic;

-- 重新创建表（按依赖关系正序创建）

-- 1. 预测话题表
CREATE TABLE prediction_topic (
    id INT AUTO_INCREMENT PRIMARY KEY,
    creator_id INT NOT NULL,

    -- 基本信息
    title VARCHAR(200) NOT NULL COMMENT '话题标题',
    description TEXT COMMENT '话题描述',
    category VARCHAR(50) DEFAULT 'stock' COMMENT '分类: stock/index/concept/policy/event/other',

    -- 市场数据
    yes_total_shares INT DEFAULT 0 NOT NULL COMMENT 'YES方总份额',
    no_total_shares INT DEFAULT 0 NOT NULL COMMENT 'NO方总份额',
    yes_price FLOAT DEFAULT 500.0 NOT NULL COMMENT 'YES方价格（0-1000）',
    no_price FLOAT DEFAULT 500.0 NOT NULL COMMENT 'NO方价格（0-1000）',

    -- 奖池
    total_pool FLOAT DEFAULT 0.0 NOT NULL COMMENT '总奖池（2%交易税累积）',

    -- 领主信息
    yes_lord_id INT COMMENT 'YES方领主',
    no_lord_id INT COMMENT 'NO方领主',

    -- 状态
    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled/cancelled',
    result VARCHAR(10) COMMENT '结算结果: yes/no/draw',

    -- 时间
    deadline DATETIME NOT NULL COMMENT '截止时间',
    settled_at DATETIME COMMENT '结算时间',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

    -- 统计
    views_count INT DEFAULT 0,
    comments_count INT DEFAULT 0,
    participants_count INT DEFAULT 0,

    FOREIGN KEY (creator_id) REFERENCES user(id),
    FOREIGN KEY (yes_lord_id) REFERENCES user(id),
    FOREIGN KEY (no_lord_id) REFERENCES user(id),
    INDEX idx_creator_id (creator_id),
    INDEX idx_status (status),
    INDEX idx_category (category),
    INDEX idx_created_at (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='预测话题';

-- 2. 用户持仓表
CREATE TABLE prediction_position (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    topic_id INT NOT NULL,
    direction VARCHAR(3) NOT NULL COMMENT '方向: yes/no',
    shares INT DEFAULT 0 NOT NULL COMMENT '持有份额',
    avg_cost FLOAT DEFAULT 0.0 NOT NULL COMMENT '平均成本',
    total_invested FLOAT DEFAULT 0.0 NOT NULL COMMENT '总投入',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

    FOREIGN KEY (user_id) REFERENCES user(id) ON DELETE CASCADE,
    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
    UNIQUE KEY unique_position (user_id, topic_id, direction),
    INDEX idx_user_topic (user_id, topic_id),
    INDEX idx_topic (topic_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户持仓';

-- 3. 交易记录表
CREATE TABLE prediction_transaction (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    topic_id INT NOT NULL,
    direction VARCHAR(3) NOT NULL COMMENT '方向: yes/no',
    trade_type VARCHAR(10) NOT NULL COMMENT '交易类型: buy/sell',
    shares INT NOT NULL COMMENT '交易份额',
    price FLOAT NOT NULL COMMENT '交易价格',
    amount FLOAT NOT NULL COMMENT '交易金额',
    tax FLOAT DEFAULT 0.0 NOT NULL COMMENT '交易税',
    total_cost FLOAT NOT NULL COMMENT '总成本（含税）',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (user_id) REFERENCES user(id),
    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id),
    INDEX idx_user_id (user_id),
    INDEX idx_topic_id (topic_id),
    INDEX idx_created_at (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='交易记录';

-- 4. 话题评论表
CREATE TABLE topic_comment (
    id INT AUTO_INCREMENT PRIMARY KEY,
    topic_id INT NOT NULL,
    user_id INT NOT NULL,
    content TEXT NOT NULL COMMENT '评论内容',
    direction VARCHAR(3) COMMENT '预测方向: yes/no',
    is_published BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已发布',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

    -- 观点IPO相关
    total_investment INT DEFAULT 0 NOT NULL COMMENT '总投资额',
    investor_count INT DEFAULT 0 NOT NULL COMMENT '投资人数',
    is_verified BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已验证',
    verification_result VARCHAR(20) COMMENT '验证结果: correct/incorrect',
    position_rank INT COMMENT '评论位置排名',

    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES user(id),
    INDEX idx_topic_id (topic_id),
    INDEX idx_user_id (user_id),
    INDEX idx_position_rank (position_rank)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='话题评论';

-- 5. 评论投资记录表（观点IPO）
CREATE TABLE comment_investment (
    id INT AUTO_INCREMENT PRIMARY KEY,
    comment_id INT NOT NULL,
    user_id INT NOT NULL,
    shares INT NOT NULL COMMENT '投资份额',
    amount INT NOT NULL COMMENT '投资金额',
    avg_price FLOAT NOT NULL COMMENT '平均价格',
    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (comment_id) REFERENCES topic_comment(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES user(id),
    INDEX idx_comment_id (comment_id),
    INDEX idx_user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='评论投资记录';

-- 6. 评论位置竞拍记录（首发权拍卖）
CREATE TABLE comment_position_bid (
    id INT AUTO_INCREMENT PRIMARY KEY,
    topic_id INT NOT NULL,
    user_id INT NOT NULL,
    position INT NOT NULL COMMENT '位置：1/2/3',
    bid_amount INT NOT NULL COMMENT '竞拍金额',
    status VARCHAR(20) DEFAULT 'pending' NOT NULL COMMENT '状态: pending/won/outbid',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    expires_at DATETIME NOT NULL COMMENT '过期时间',

    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES user(id),
    INDEX idx_topic_id (topic_id),
    INDEX idx_user_id (user_id),
    INDEX idx_position (topic_id, position)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='评论位置竞拍记录';

-- 7. 时间胶囊话题表
CREATE TABLE time_capsule_topic (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    title VARCHAR(200) NOT NULL COMMENT '话题标题',
    description TEXT COMMENT '话题描述',
    encrypted_content TEXT COMMENT '加密的预测内容',
    encryption_key VARCHAR(500) COMMENT '加密密钥（后端存储）',
    start_year INT NOT NULL COMMENT '开始年份',
    end_year INT NOT NULL COMMENT '结束年份',
    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled/cancelled',
    is_decrypted BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已解密',
    actual_happened_year INT COMMENT '实际发生年份',
    total_pool INT DEFAULT 0 NOT NULL COMMENT '总奖池',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (user_id) REFERENCES user(id),
    INDEX idx_user_id (user_id),
    INDEX idx_status (status),
    INDEX idx_year_range (start_year, end_year)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间胶囊话题';

-- 8. 时间胶囊时间段表
CREATE TABLE time_capsule_time_slot (
    id INT AUTO_INCREMENT PRIMARY KEY,
    topic_id INT NOT NULL,
    year_start INT NOT NULL COMMENT '年份区间开始',
    year_end INT NOT NULL COMMENT '年份区间结束',
    current_holder_id INT COMMENT '当前持有者',
    current_price INT DEFAULT 100 NOT NULL COMMENT '当前价格',
    total_bids INT DEFAULT 0 NOT NULL COMMENT '总竞拍次数',
    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled',

    FOREIGN KEY (topic_id) REFERENCES time_capsule_topic(id) ON DELETE CASCADE,
    FOREIGN KEY (current_holder_id) REFERENCES user(id),
    INDEX idx_topic_id (topic_id),
    INDEX idx_holder (current_holder_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间胶囊时间段';

-- 9. 时间段竞拍记录表
CREATE TABLE time_slot_bid (
    id INT AUTO_INCREMENT PRIMARY KEY,
    slot_id INT NOT NULL,
    user_id INT NOT NULL,
    bid_amount INT NOT NULL COMMENT '竞拍金额',
    status VARCHAR(20) DEFAULT 'outbid' NOT NULL COMMENT '状态: current/outbid/won',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (slot_id) REFERENCES time_capsule_time_slot(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES user(id),
    INDEX idx_slot_id (slot_id),
    INDEX idx_user_id (user_id),
    INDEX idx_created_at (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间段竞拍记录';