#!/usr/bin/env python3
"""
Step 2: 为 dev_dedup 版本做严格冗余复制 + 从 bk_20260422_* 恢复原具体 strategy 数据。

ID 命名规则：
  - 复制的 capability / resource 行 ID 加 '__dd' 后缀
  - strategy 从备份恢复，沿用原 ID（已从主表 DELETE，无冲突）

执行顺序（FK 依赖）：
  1. capability  (332 → dev_dedup 新 ID)
  2. resource    (2539 → dev_dedup 新 ID)
  3. requirement_capability  (1106 → remap cap_id 到 dev_dedup)
  4. requirement_resource    (2736 → remap resource_id 到 dev_dedup)
  5. strategy    (99 from bk，version 改 dev_dedup)
  6. requirement_strategy    (99 from bk，is_selected 默认 TRUE，coverage 空)
  7. strategy_capability     (703 from bk，remap cap_id)
  8. strategy_resource       (2736 from bk，remap resource_id)
"""
import sys, time
from pathlib import Path

import psycopg2.extras

sys.path.insert(0, str(Path(__file__).parent.parent.parent))
from knowhub.knowhub_db.pg_capability_store import PostgreSQLCapabilityStore

SUFFIX = '__dd'


def remap(old_id: str) -> str:
    return f'{old_id}{SUFFIX}'


def t(label, fn):
    t0 = time.time()
    r = fn()
    print(f'  [{time.time()-t0:.1f}s] {label}', flush=True)
    return r


def main():
    s = PostgreSQLCapabilityStore()
    cur = s._get_cursor()
    try:
        cur.execute("SET statement_timeout = '120s'")
        cur.execute("""SELECT pid FROM pg_stat_activity WHERE state='idle in transaction'
                       AND pid!=pg_backend_pid() AND datname=current_database()""")
        for r in cur.fetchall():
            cur.execute("SELECT pg_terminate_backend(%s)", (r['pid'],))

        # ===== 1. capability 复制 =====
        print('\n[1] 复制 capability 给 dev_dedup', flush=True)
        cur.execute("""SELECT id, name, criterion, description, effects
                       FROM capability WHERE version='dev_abstract'""")
        caps = cur.fetchall()
        print(f'  源 cap 行数: {len(caps)}', flush=True)
        inserted = 0
        for c in caps:
            new_id = remap(c['id'])
            cur.execute("""INSERT INTO capability (id, name, criterion, description, effects, version)
                           VALUES (%s, %s, %s, %s, %s, 'dev_dedup') ON CONFLICT (id) DO NOTHING""",
                        (new_id, c['name'], c['criterion'], c['description'],
                         psycopg2.extras.Json(c['effects']) if c['effects'] is not None else None))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 2. resource 复制 =====
        print('\n[2] 复制 resource 给 dev_dedup', flush=True)
        cur.execute("""SELECT id, title, body, secure_body, content_type, metadata,
                              sort_order, submitted_by, created_at, updated_at, images
                       FROM resource WHERE version='dev_abstract'""")
        ress = cur.fetchall()
        print(f'  源 resource 行数: {len(ress)}', flush=True)
        inserted = 0
        for r in ress:
            new_id = remap(r['id'])
            cur.execute("""INSERT INTO resource (id, title, body, secure_body, content_type,
                                                 metadata, sort_order, submitted_by, created_at,
                                                 updated_at, images, version)
                           VALUES (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,'dev_dedup')
                           ON CONFLICT (id) DO NOTHING""",
                        (new_id, r['title'], r['body'], r['secure_body'], r['content_type'],
                         psycopg2.extras.Json(r['metadata']) if r['metadata'] is not None else None,
                         r['sort_order'], r['submitted_by'], r['created_at'], r['updated_at'],
                         psycopg2.extras.Json(r['images']) if r['images'] is not None else None))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 3. requirement_capability 复制（remap cap_id）=====
        print('\n[3] 复制 requirement_capability（remap cap_id）', flush=True)
        cur.execute("""SELECT rc.requirement_id, rc.capability_id
                       FROM requirement_capability rc
                       JOIN capability c ON c.id=rc.capability_id
                       WHERE c.version='dev_abstract'""")
        rc_rows = cur.fetchall()
        print(f'  源 req_cap 行数: {len(rc_rows)}', flush=True)
        inserted = 0
        for row in rc_rows:
            cur.execute("""INSERT INTO requirement_capability (requirement_id, capability_id)
                           VALUES (%s, %s) ON CONFLICT DO NOTHING""",
                        (row['requirement_id'], remap(row['capability_id'])))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 4. requirement_resource 复制（remap resource_id）=====
        print('\n[4] 复制 requirement_resource（remap resource_id）', flush=True)
        cur.execute("""SELECT rr.requirement_id, rr.resource_id
                       FROM requirement_resource rr
                       JOIN resource r ON r.id=rr.resource_id
                       WHERE r.version='dev_abstract'""")
        rr_rows = cur.fetchall()
        print(f'  源 req_resource 行数: {len(rr_rows)}', flush=True)
        inserted = 0
        for row in rr_rows:
            cur.execute("""INSERT INTO requirement_resource (requirement_id, resource_id)
                           VALUES (%s, %s) ON CONFLICT DO NOTHING""",
                        (row['requirement_id'], remap(row['resource_id'])))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 5. strategy 从 backup 恢复 =====
        print('\n[5] strategy 从 bk_20260422_strategy 恢复', flush=True)
        cur.execute("""SELECT id, name, description, body, status, created_at, updated_at
                       FROM bk_20260422_strategy""")
        bk_strats = cur.fetchall()
        print(f'  备份 strategy 行数: {len(bk_strats)}', flush=True)
        inserted = 0
        for st in bk_strats:
            cur.execute("""INSERT INTO strategy (id, name, description, body, status,
                                                 created_at, updated_at, version)
                           VALUES (%s,%s,%s,%s,%s,%s,%s,'dev_dedup')
                           ON CONFLICT (id) DO NOTHING""",
                        (st['id'], st['name'], st['description'],
                         psycopg2.extras.Json(st['body']) if st['body'] is not None else None,
                         st['status'], st['created_at'], st['updated_at']))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 6. requirement_strategy 从 backup 恢复 =====
        print('\n[6] requirement_strategy 从备份恢复（is_selected=TRUE）', flush=True)
        cur.execute("""SELECT column_name FROM information_schema.columns
                       WHERE table_name='bk_20260422_requirement_strategy' ORDER BY ordinal_position""")
        bk_rs_cols = [r['column_name'] for r in cur.fetchall()]
        print(f'  bk_rs 列: {bk_rs_cols}', flush=True)
        cur.execute(f"SELECT * FROM bk_20260422_requirement_strategy")
        bk_rs = cur.fetchall()
        print(f'  bk req_strategy 行数: {len(bk_rs)}', flush=True)
        inserted = 0
        # live req_strategy 目前有 (req_id, strat_id, [role], is_selected, coverage_score, coverage_explanation)
        cur.execute("""SELECT column_name FROM information_schema.columns
                       WHERE table_name='requirement_strategy' ORDER BY ordinal_position""")
        live_rs_cols = [r['column_name'] for r in cur.fetchall()]
        print(f'  live_rs 列: {live_rs_cols}', flush=True)
        for row in bk_rs:
            # 只取 requirement_id / strategy_id；is_selected 默认 TRUE（备份都是选中的）
            # 其他 coverage 字段留 NULL
            cur.execute("""INSERT INTO requirement_strategy (requirement_id, strategy_id, is_selected)
                           VALUES (%s, %s, TRUE) ON CONFLICT DO NOTHING""",
                        (row['requirement_id'], row['strategy_id']))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}', flush=True)

        # ===== 7. strategy_capability 从 backup 恢复（remap cap_id）=====
        print('\n[7] strategy_capability 从备份恢复（remap cap_id）', flush=True)
        cur.execute("SELECT strategy_id, capability_id FROM bk_20260422_strategy_capability")
        bk_sc = cur.fetchall()
        print(f'  bk strat_cap 行数: {len(bk_sc)}', flush=True)
        inserted = 0
        skipped_nocap = 0
        # 检查哪些 backup cap_id 存在于当前 capability（dev_abstract）
        cur.execute("SELECT id FROM capability WHERE version='dev_abstract'")
        valid_old_caps = {r['id'] for r in cur.fetchall()}
        for row in bk_sc:
            if row['capability_id'] not in valid_old_caps:
                skipped_nocap += 1; continue
            cur.execute("""INSERT INTO strategy_capability (strategy_id, capability_id)
                           VALUES (%s, %s) ON CONFLICT DO NOTHING""",
                        (row['strategy_id'], remap(row['capability_id'])))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}  (skipped: {skipped_nocap} cap_id 不在当前 cap 表)', flush=True)

        # ===== 8. strategy_resource 从 backup 恢复（remap resource_id）=====
        print('\n[8] strategy_resource 从备份恢复（remap resource_id）', flush=True)
        cur.execute("SELECT strategy_id, resource_id FROM bk_20260422_strategy_resource")
        bk_sr = cur.fetchall()
        print(f'  bk strat_resource 行数: {len(bk_sr)}', flush=True)
        inserted = 0; skipped_nores = 0
        cur.execute("SELECT id FROM resource WHERE version='dev_abstract'")
        valid_old_ress = {r['id'] for r in cur.fetchall()}
        for row in bk_sr:
            if row['resource_id'] not in valid_old_ress:
                skipped_nores += 1; continue
            cur.execute("""INSERT INTO strategy_resource (strategy_id, resource_id)
                           VALUES (%s, %s) ON CONFLICT DO NOTHING""",
                        (row['strategy_id'], remap(row['resource_id'])))
            inserted += cur.rowcount or 0
        print(f'  inserted: {inserted}  (skipped: {skipped_nores} resource_id 不在当前 resource 表)', flush=True)

        # ===== 汇总 =====
        print('\n=== 迁移后汇总 ===', flush=True)
        for tbl in ['capability', 'resource', 'strategy', 'knowledge']:
            cur.execute(f"SELECT version, COUNT(*) n FROM {tbl} GROUP BY version ORDER BY n DESC")
            parts = [f'{r["version"]}={r["n"]}' for r in cur.fetchall()]
            print(f'  {tbl}: {", ".join(parts)}', flush=True)
        for tbl in ['requirement_capability', 'requirement_resource',
                    'requirement_strategy', 'strategy_capability', 'strategy_resource']:
            cur.execute(f'SELECT COUNT(*) c FROM {tbl}')
            print(f'  {tbl}: {cur.fetchone()["c"]}', flush=True)
    finally:
        cur.close(); s.close()


if __name__ == '__main__':
    main()