-- =============================================================================
-- 迁移脚本：创建 biz Schema 业务表（coach_tasks / coach_task_history / notes / trigger_jobs）
-- 日期：2026-02-27
-- 目标库：test_zqyy_app（通过 APP_DB_DSN 连接）
-- 说明：在 biz Schema 下创建助教任务系统和备注系统所需的 4 张业务表，
--       包含字段定义、约束、CHECK 约束、外键、部分唯一索引和查询索引。
-- 前提：biz Schema 已由 2026-02-24__p1_create_auth_biz_schemas.sql 创建
-- 需求：1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9
-- =============================================================================

-- 确保 biz Schema 存在（幂等）
CREATE SCHEMA IF NOT EXISTS biz;

-- ---------------------------------------------------------------------------
-- 1. biz.coach_tasks — 助教任务表
-- ---------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS biz.coach_tasks (
    id                  BIGSERIAL PRIMARY KEY,
    site_id             BIGINT NOT NULL,
    assistant_id        BIGINT NOT NULL,
    member_id           BIGINT NOT NULL,
    task_type           VARCHAR(50) NOT NULL,
    status              VARCHAR(20) NOT NULL DEFAULT 'active',
    priority_score      NUMERIC(5,2),
    expires_at          TIMESTAMPTZ,
    is_pinned           BOOLEAN DEFAULT FALSE,
    abandon_reason      TEXT,
    completed_at        TIMESTAMPTZ,
    completed_task_type VARCHAR(50),
    parent_task_id      BIGINT REFERENCES biz.coach_tasks(id),
    created_at          TIMESTAMPTZ DEFAULT NOW(),
    updated_at          TIMESTAMPTZ DEFAULT NOW()
);

-- 部分唯一索引：同一 (site_id, assistant_id, member_id, task_type) 下 active 任务最多一条
CREATE UNIQUE INDEX IF NOT EXISTS idx_coach_tasks_site_assistant_member_type
    ON biz.coach_tasks (site_id, assistant_id, member_id, task_type)
    WHERE status = 'active';

-- 助教任务列表查询索引
CREATE INDEX IF NOT EXISTS idx_coach_tasks_assistant_status
    ON biz.coach_tasks (site_id, assistant_id, status);

-- ---------------------------------------------------------------------------
-- 2. biz.coach_task_history — 任务变更历史表
-- ---------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS biz.coach_task_history (
    id              BIGSERIAL PRIMARY KEY,
    task_id         BIGINT NOT NULL REFERENCES biz.coach_tasks(id),
    action          VARCHAR(50) NOT NULL,
    old_status      VARCHAR(20),
    new_status      VARCHAR(20),
    old_task_type   VARCHAR(50),
    new_task_type   VARCHAR(50),
    detail          JSONB,
    created_at      TIMESTAMPTZ DEFAULT NOW()
);

-- ---------------------------------------------------------------------------
-- 3. biz.notes — 统一备注表
-- ---------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS biz.notes (
    id                          BIGSERIAL PRIMARY KEY,
    site_id                     BIGINT NOT NULL,
    user_id                     INTEGER NOT NULL,
    target_type                 VARCHAR(50) NOT NULL,
    target_id                   BIGINT NOT NULL,
    type                        VARCHAR(20) NOT NULL DEFAULT 'normal',
    content                     TEXT NOT NULL,
    rating_service_willingness  SMALLINT CHECK (rating_service_willingness BETWEEN 1 AND 5),
    rating_revisit_likelihood   SMALLINT CHECK (rating_revisit_likelihood BETWEEN 1 AND 5),
    task_id                     BIGINT REFERENCES biz.coach_tasks(id),
    ai_score                    SMALLINT,
    ai_analysis                 TEXT,
    created_at                  TIMESTAMPTZ DEFAULT NOW(),
    updated_at                  TIMESTAMPTZ DEFAULT NOW()
);

-- 按目标查询备注索引
CREATE INDEX IF NOT EXISTS idx_notes_target
    ON biz.notes (site_id, target_type, target_id);

-- ---------------------------------------------------------------------------
-- 4. biz.trigger_jobs — 触发器配置表
-- ---------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS biz.trigger_jobs (
    id                  SERIAL PRIMARY KEY,
    job_type            VARCHAR(100) NOT NULL,
    job_name            VARCHAR(100) NOT NULL UNIQUE,
    trigger_condition   VARCHAR(20) NOT NULL,
    trigger_config      JSONB NOT NULL,
    last_run_at         TIMESTAMPTZ,
    next_run_at         TIMESTAMPTZ,
    status              VARCHAR(20) NOT NULL DEFAULT 'enabled',
    created_at          TIMESTAMPTZ DEFAULT NOW()
);

-- =============================================================================
-- 回滚脚本（按逆序执行）
-- =============================================================================
-- DROP INDEX IF EXISTS biz.idx_notes_target;
-- DROP INDEX IF EXISTS biz.idx_coach_tasks_assistant_status;
-- DROP INDEX IF EXISTS biz.idx_coach_tasks_site_assistant_member_type;
-- DROP TABLE IF EXISTS biz.trigger_jobs;
-- DROP TABLE IF EXISTS biz.notes;
-- DROP TABLE IF EXISTS biz.coach_task_history;
-- DROP TABLE IF EXISTS biz.coach_tasks;