"""
迁移脚本执行与验证：P4 业务表（coach_tasks / coach_task_history / notes / trigger_jobs）
- 在 test_zqyy_app 中执行 DDL 建表脚本和种子数据脚本
- 验证幂等性：连续执行两次无错误
- 验证表结构、约束、索引正确
- 验证种子数据完整（4 条触发器配置）
Requirements: 11.1-11.5, 12.1
"""
import os
import sys
from pathlib import Path

# 加载根 .env
root = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(root))

from dotenv import load_dotenv
load_dotenv(root / ".env")

dsn = os.environ.get("TEST_APP_DB_DSN") or os.environ.get("APP_DB_DSN")
if not dsn:
    raise RuntimeError("TEST_APP_DB_DSN / APP_DB_DSN 未配置")
if "test_zqyy_app" not in dsn:
    raise RuntimeError(f"DSN 不是测试库: {dsn}")

import psycopg2

# 迁移脚本路径
DDL_SCRIPT = root / "db" / "zqyy_app" / "migrations" / "2026-02-27__p4_create_biz_tables.sql"
SEED_SCRIPT = root / "db" / "zqyy_app" / "migrations" / "2026-02-27__p4_seed_trigger_jobs.sql"

PASS = "✅"
FAIL = "❌"
results: list[tuple[str, bool, str]] = []


def run_sql_file(conn, path: Path, label: str) -> None:
    """执行 SQL 文件（跳过注释行中的回滚语句）。"""
    sql = path.read_text(encoding="utf-8")
    with conn.cursor() as cur:
        cur.execute(sql)
    conn.commit()
    print(f"  {PASS} {label} 执行成功")


def check(name: str, ok: bool, detail: str = "") -> None:
    results.append((name, ok, detail))
    icon = PASS if ok else FAIL
    msg = f"  {icon} {name}"
    if detail:
        msg += f" — {detail}"
    print(msg)


def main() -> None:
    conn = psycopg2.connect(dsn)
    try:
        # ==================================================================
        # 第一阶段：执行迁移脚本（第 1 次）
        # ==================================================================
        print("\n" + "=" * 60)
        print("阶段 1：首次执行迁移脚本")
        print("=" * 60)
        run_sql_file(conn, DDL_SCRIPT, "DDL 建表脚本（第 1 次）")
        run_sql_file(conn, SEED_SCRIPT, "种子数据脚本（第 1 次）")

        # ==================================================================
        # 第二阶段：幂等性验证（第 2 次执行）
        # ==================================================================
        print("\n" + "=" * 60)
        print("阶段 2：幂等性验证（第 2 次执行）")
        print("=" * 60)
        try:
            run_sql_file(conn, DDL_SCRIPT, "DDL 建表脚本（第 2 次 — 幂等）")
            check("DDL 幂等性", True)
        except Exception as e:
            check("DDL 幂等性", False, str(e))
            conn.rollback()

        try:
            run_sql_file(conn, SEED_SCRIPT, "种子数据脚本（第 2 次 — 幂等）")
            check("种子数据幂等性", True)
        except Exception as e:
            check("种子数据幂等性", False, str(e))
            conn.rollback()

        # ==================================================================
        # 第三阶段：表结构验证
        # ==================================================================
        print("\n" + "=" * 60)
        print("阶段 3：表结构验证")
        print("=" * 60)
        with conn.cursor() as cur:
            # 3.1 验证 4 张表存在
            expected_tables = ["coach_tasks", "coach_task_history", "notes", "trigger_jobs"]
            cur.execute("""
                SELECT table_name FROM information_schema.tables
                WHERE table_schema = 'biz' AND table_name = ANY(%s)
                ORDER BY table_name
            """, (expected_tables,))
            found_tables = [r[0] for r in cur.fetchall()]
            check(
                "4 张表存在",
                set(expected_tables) == set(found_tables),
                f"期望 {sorted(expected_tables)}，实际 {sorted(found_tables)}",
            )

            # 3.2 验证 coach_tasks 关键字段
            cur.execute("""
                SELECT column_name, data_type, is_nullable, column_default
                FROM information_schema.columns
                WHERE table_schema = 'biz' AND table_name = 'coach_tasks'
                ORDER BY ordinal_position
            """)
            ct_cols = {r[0]: r for r in cur.fetchall()}
            required_cols = [
                "id", "site_id", "assistant_id", "member_id", "task_type",
                "status", "priority_score", "expires_at", "is_pinned",
                "abandon_reason", "completed_at", "completed_task_type",
                "parent_task_id", "created_at", "updated_at",
            ]
            missing = [c for c in required_cols if c not in ct_cols]
            check("coach_tasks 字段完整", len(missing) == 0, f"缺失: {missing}" if missing else f"{len(required_cols)} 个字段")

            # 3.3 验证 coach_tasks.status 默认值
            status_col = ct_cols.get("status")
            if status_col:
                check(
                    "coach_tasks.status 默认 'active'",
                    status_col[3] is not None and "active" in str(status_col[3]),
                    f"default={status_col[3]}",
                )

            # 3.4 验证 notes CHECK 约束
            cur.execute("""
                SELECT conname, pg_get_constraintdef(oid)
                FROM pg_constraint
                WHERE conrelid = 'biz.notes'::regclass AND contype = 'c'
            """)
            check_constraints = cur.fetchall()
            check(
                "notes CHECK 约束（评分 1-5）",
                len(check_constraints) >= 2,
                f"找到 {len(check_constraints)} 个 CHECK 约束: {[c[0] for c in check_constraints]}",
            )

            # 3.5 验证外键
            cur.execute("""
                SELECT conname, conrelid::regclass, confrelid::regclass
                FROM pg_constraint
                WHERE contype = 'f'
                  AND (conrelid::regclass::text LIKE 'biz.%')
                ORDER BY conname
            """)
            fks = cur.fetchall()
            fk_names = [r[0] for r in fks]
            check(
                "外键约束存在",
                len(fks) >= 3,
                f"找到 {len(fks)} 个外键: {fk_names}",
            )

        # ==================================================================
        # 第四阶段：索引验证
        # ==================================================================
        print("\n" + "=" * 60)
        print("阶段 4：索引验证")
        print("=" * 60)
        with conn.cursor() as cur:
            expected_indexes = [
                "idx_coach_tasks_site_assistant_member_type",
                "idx_coach_tasks_assistant_status",
                "idx_notes_target",
            ]
            cur.execute("""
                SELECT indexname, indexdef FROM pg_indexes
                WHERE schemaname = 'biz' AND indexname = ANY(%s)
            """, (expected_indexes,))
            found_idx = {r[0]: r[1] for r in cur.fetchall()}
            for idx_name in expected_indexes:
                check(
                    f"索引 {idx_name}",
                    idx_name in found_idx,
                    found_idx.get(idx_name, "未找到")[:80] if idx_name in found_idx else "未找到",
                )

            # 验证部分唯一索引包含 WHERE 子句
            partial_idx = found_idx.get("idx_coach_tasks_site_assistant_member_type", "")
            check(
                "部分唯一索引含 WHERE status='active'",
                "active" in partial_idx.lower() and "unique" in partial_idx.lower(),
                partial_idx[:100] if partial_idx else "未找到",
            )

            # 验证 trigger_jobs.job_name UNIQUE 约束
            cur.execute("""
                SELECT indexname FROM pg_indexes
                WHERE schemaname = 'biz' AND tablename = 'trigger_jobs'
                  AND indexdef ILIKE '%unique%'
            """)
            unique_idx = cur.fetchall()
            check(
                "trigger_jobs.job_name UNIQUE",
                len(unique_idx) >= 1,
                f"找到 {len(unique_idx)} 个唯一索引",
            )

        # ==================================================================
        # 第五阶段：种子数据验证
        # ==================================================================
        print("\n" + "=" * 60)
        print("阶段 5：种子数据验证")
        print("=" * 60)
        with conn.cursor() as cur:
            cur.execute("SELECT job_name, trigger_condition, trigger_config, status FROM biz.trigger_jobs ORDER BY job_name")
            rows = cur.fetchall()
            check("trigger_jobs 记录数 = 4", len(rows) == 4, f"实际 {len(rows)} 条")

            expected_jobs = {
                "note_reclassify_backfill": ("event", "recall_completed"),
                "recall_completion_check": ("event", "etl_data_updated"),
                "task_expiry_check": ("interval", None),
                "task_generator": ("cron", None),
            }
            for job_name, trigger_condition, trigger_config, status in rows:
                exp = expected_jobs.get(job_name)
                if exp:
                    cond_ok = trigger_condition == exp[0]
                    if exp[0] == "event":
                        event_ok = trigger_config.get("event_name") == exp[1]
                        check(f"  {job_name}", cond_ok and event_ok,
                              f"condition={trigger_condition}, event={trigger_config.get('event_name')}, status={status}")
                    elif exp[0] == "cron":
                        cron_ok = "0 4 * * *" in str(trigger_config.get("cron_expression", ""))
                        check(f"  {job_name}", cond_ok and cron_ok,
                              f"condition={trigger_condition}, cron={trigger_config.get('cron_expression')}, status={status}")
                    elif exp[0] == "interval":
                        interval_ok = trigger_config.get("interval_seconds") == 3600
                        check(f"  {job_name}", cond_ok and interval_ok,
                              f"condition={trigger_condition}, interval={trigger_config.get('interval_seconds')}s, status={status}")
                else:
                    check(f"  {job_name}", False, "未预期的 job")

        # ==================================================================
        # 汇总
        # ==================================================================
        print("\n" + "=" * 60)
        total = len(results)
        passed = sum(1 for _, ok, _ in results if ok)
        failed = total - passed
        print(f"验证完成：{passed}/{total} 通过，{failed} 失败")
        if failed:
            print("\n失败项：")
            for name, ok, detail in results:
                if not ok:
                    print(f"  {FAIL} {name}: {detail}")
            sys.exit(1)
        else:
            print(f"{PASS} 全部验证通过！")
        print("=" * 60)

    finally:
        conn.close()


if __name__ == "__main__":
    main()