-- PostgreSQL 建表脚本
-- 用于 go-trustlog 数据库持久化模块
-- PostgreSQL 12+ 版本

-- ============================================
-- 1. operation 表 - 操作记录表
-- ============================================
CREATE TABLE IF NOT EXISTS operation (
    op_id              VARCHAR(32) NOT NULL PRIMARY KEY,
    op_actor           VARCHAR(64),
    doid               VARCHAR(512),
    producer_id        VARCHAR(32),
    request_body_hash  VARCHAR(128),
    response_body_hash VARCHAR(128),
    sign               VARCHAR(512),
    op_source          VARCHAR(10),
    op_type            VARCHAR(30),
    do_prefix          VARCHAR(128),
    do_repository      VARCHAR(64),
    client_ip          VARCHAR(32),          -- 客户端IP（可空，仅落库）
    server_ip          VARCHAR(32),          -- 服务端IP（可空，仅落库）
    trustlog_status    VARCHAR(32),          -- 存证状态：NOT_TRUSTLOGGED / TRUSTLOGGED
    timestamp          TIMESTAMP,
    created_at         TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- 创建索引
CREATE INDEX IF NOT EXISTS idx_operation_timestamp ON operation(timestamp);
CREATE INDEX IF NOT EXISTS idx_operation_status ON operation(trustlog_status);
CREATE INDEX IF NOT EXISTS idx_operation_doid ON operation(doid);

-- 添加注释
COMMENT ON TABLE operation IS '操作记录表';
COMMENT ON COLUMN operation.op_id IS '操作ID（主键）';
COMMENT ON COLUMN operation.client_ip IS '客户端IP（可空，仅落库，不存证）';
COMMENT ON COLUMN operation.server_ip IS '服务端IP（可空，仅落库，不存证）';
COMMENT ON COLUMN operation.trustlog_status IS '存证状态：NOT_TRUSTLOGGED（未存证）/ TRUSTLOGGED（已存证）';

-- ============================================
-- 2. trustlog_cursor 表 - 游标表（任务发现队列）
-- ============================================
CREATE TABLE IF NOT EXISTS trustlog_cursor (
    cursor_key       VARCHAR(64) NOT NULL PRIMARY KEY,
    cursor_value     VARCHAR(128) NOT NULL,           -- 存储时间戳（RFC3339Nano格式）
    last_updated_at  TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- 创建索引
CREATE INDEX IF NOT EXISTS idx_cursor_updated_at ON trustlog_cursor(last_updated_at);

-- 添加注释
COMMENT ON TABLE trustlog_cursor IS '游标表，记录扫描位置（Cursor + Retry 双层模式）';
COMMENT ON COLUMN trustlog_cursor.cursor_key IS '游标键（如：operation_scan）';
COMMENT ON COLUMN trustlog_cursor.cursor_value IS '游标值（最后处理的时间戳，RFC3339Nano格式）';
COMMENT ON COLUMN trustlog_cursor.last_updated_at IS '最后更新时间';

-- ============================================
-- 3. trustlog_retry 表 - 重试表
-- ============================================
CREATE TABLE IF NOT EXISTS trustlog_retry (
    op_id              VARCHAR(32) NOT NULL PRIMARY KEY,
    retry_count        INTEGER DEFAULT 0,
    retry_status       VARCHAR(32) DEFAULT 'PENDING',
    last_retry_at      TIMESTAMP,
    next_retry_at      TIMESTAMP,
    error_message      TEXT,
    created_at         TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at         TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- 创建索引
CREATE INDEX IF NOT EXISTS idx_retry_status ON trustlog_retry(retry_status);
CREATE INDEX IF NOT EXISTS idx_retry_next_retry_at ON trustlog_retry(next_retry_at);

-- 添加注释
COMMENT ON TABLE trustlog_retry IS '重试表，用于管理失败的存证操作';
COMMENT ON COLUMN trustlog_retry.retry_status IS '重试状态：PENDING（待重试）/ RETRYING（重试中）/ DEAD_LETTER（死信）';
COMMENT ON COLUMN trustlog_retry.retry_count IS '重试次数';
COMMENT ON COLUMN trustlog_retry.next_retry_at IS '下次重试时间（用于指数退避）';

-- ============================================
-- 验证查询
-- ============================================

-- 查询所有表
SELECT tablename FROM pg_tables WHERE schemaname = 'public' 
    AND tablename IN ('operation', 'trustlog_cursor', 'trustlog_retry');

-- 查询 operation 表结构
SELECT column_name, data_type, is_nullable 
FROM information_schema.columns 
WHERE table_name = 'operation' 
ORDER BY ordinal_position;

-- 查询所有索引
SELECT indexname, tablename FROM pg_indexes 
WHERE tablename IN ('operation', 'trustlog_cursor', 'trustlog_retry')
ORDER BY tablename, indexname;