"""회사·가입 신청 저장소 (B01_Dashboard_Repository 에서 분리, 700줄 제한).

회사를 만들고 고치고 찾는 일, 그리고 그 회사에 들어가겠다는 신청을 다루는 곳이다.
사용자·프로젝트 쪽은 `B01_Dashboard_Repository` 에 남는다.
"""

from __future__ import annotations

from typing import Any

import aiomysql

from common_util.common_util_audit import record_audit
from config.config_db import get_db_pool

from .B01_Dashboard_Repository import role_for_company


async def get_user_company(company_id: int | None) -> dict[str, Any] | None:
    if company_id is None:
        return None
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT c.id, c.name, c.business_registration_number, c.business_address,
                      c.business_owner, c.business_status, c.logo_asset_id,
                      COUNT(DISTINCT u.id) AS user_count,
                      COUNT(DISTINCT p.id) AS project_count
               FROM companies c
               LEFT JOIN users u ON u.company_id = c.id AND u.deleted_at IS NULL
               LEFT JOIN projects p ON p.company_id = c.id AND p.deleted_at IS NULL
               WHERE c.id = %s AND c.deleted_at IS NULL
               GROUP BY c.id""",
            (company_id,),
        )
        return await cursor.fetchone()


async def update_company(company_id: int, data: dict[str, Any]) -> bool:
    """회사 정보 수정 (2026-09-06 사용자 지시) — 회사 관리자는 자기 회사, 시스템관리자는 전체."""
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            """UPDATE companies
               SET name = %s, business_registration_number = %s,
                   business_address = %s, business_owner = %s
               WHERE id = %s AND deleted_at IS NULL""",
            (
                data["name"],
                data["business_registration_number"],
                data.get("business_address"),
                data.get("business_owner"),
                company_id,
            ),
        )
        changed = cursor.rowcount > 0
        if not changed:
            # 값이 하나도 안 바뀌면 rowcount 가 0 이다 — 회사가 없는 것과는 다르다.
            await cursor.execute(
                "SELECT 1 FROM companies WHERE id = %s AND deleted_at IS NULL", (company_id,)
            )
            changed = await cursor.fetchone() is not None
        await connection.commit()
        return changed


async def search_companies(query: str) -> list[dict[str, Any]]:
    pool = get_db_pool()
    pattern = f"%{query}%"
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT id, name, business_registration_number, business_status
               FROM companies
               WHERE deleted_at IS NULL AND (name LIKE %s OR business_registration_number LIKE %s)
               ORDER BY name LIMIT 20""",
            (pattern, pattern),
        )
        return list(await cursor.fetchall())


async def create_company(
    user_id: int, data: dict[str, Any], request: Any | None = None
) -> dict[str, Any]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        try:
            await connection.begin()
            await cursor.execute(
                """INSERT INTO companies
                   (name, business_registration_number, business_address, business_owner,
                    business_status, master_user_id, created_by, status)
                   VALUES (%s, %s, %s, %s, '활동중', %s, %s, 'ACTIVE')""",
                (
                    data["name"],
                    data["business_registration_number"],
                    data.get("business_address"),
                    data.get("business_owner"),
                    user_id,
                    user_id,
                ),
            )
            company_id = cursor.lastrowid
            await cursor.execute(
                """UPDATE users
                   SET company_id = %s, role = 'ADMIN', is_master = TRUE,
                      status = 'ACTIVE'
                   WHERE id = %s""",
                (company_id, user_id),
            )
            await record_audit(
                cursor,
                actor_id=user_id,
                action="COMPANY_CREATE",
                resource_type="company",
                resource_ref=company_id,
                request=request,
            )
            await connection.commit()
            return {"company_id": company_id, "status": "ACTIVE"}
        except Exception:
            await connection.rollback()
            raise


async def create_system_company(
    actor_id: int, data: dict[str, Any], request: Any | None = None
) -> dict[str, Any]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        try:
            await connection.begin()
            await cursor.execute(
                """INSERT INTO companies
                   (name, business_registration_number, business_address, business_owner,
                    business_status, created_by, status)
                   VALUES (%s, %s, %s, %s, '활동중', %s, 'ACTIVE')""",
                (
                    data["name"],
                    data["business_registration_number"],
                    data.get("business_address"),
                    data.get("business_owner"),
                    actor_id,
                ),
            )
            company_id = cursor.lastrowid
            await record_audit(
                cursor,
                actor_id=actor_id,
                action="COMPANY_CREATE",
                resource_type="company",
                resource_ref=company_id,
                request=request,
            )
            await connection.commit()
            return {"company_id": company_id, "status": "ACTIVE"}
        except Exception:
            await connection.rollback()
            raise


async def join_company(user_id: int, company_id: int) -> dict[str, Any] | None:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        try:
            await connection.begin()
            # 이미 소속이 있는 사람의 재신청은 막는다 (2026-09-06 사용자 지시) —
            # 예전에는 신청 즉시 소속이 풀리고 승인대기로 떨어져 회사를 잃었다.
            await cursor.execute(
                "SELECT company_id FROM users WHERE id = %s AND deleted_at IS NULL FOR UPDATE",
                (user_id,),
            )
            current = await cursor.fetchone()
            if current and current[0]:
                await connection.rollback()
                return None
            await cursor.execute(
                """INSERT INTO join_requests (user_id, company_id, status)
                   VALUES (%s, %s, 'PENDING')
                   ON DUPLICATE KEY UPDATE status = 'PENDING', requested_at = CURRENT_TIMESTAMP,
                     reviewed_by = NULL, reviewed_at = NULL""",
                (user_id, company_id),
            )
            request_id = cursor.lastrowid
            await cursor.execute(
                "UPDATE users SET status = 'PENDING', company_id = NULL WHERE id = %s", (user_id,)
            )
            await connection.commit()
            return {"join_request_id": request_id, "status": "PENDING"}
        except Exception:
            await connection.rollback()
            raise


async def list_join_requests(company_id: int | None = None) -> list[dict[str, Any]]:
    # 처리 끝난 신청은 목록에 남기지 않는다 (2026-09-06 사용자 지시) — 승인된 사람은
    # 사용자 관리 목록에 이미 있어 같은 사람이 두 번 보였다.
    where = "WHERE jr.status = 'PENDING'" + (" AND jr.company_id = %s" if company_id else "")
    params = (company_id,) if company_id else ()
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            f"""SELECT jr.id, jr.user_id, jr.company_id, jr.requested_at, jr.status,
                       u.email AS user_email, u.name AS user_name, c.name AS company_name
                FROM join_requests jr
                JOIN users u ON u.id = jr.user_id
                JOIN companies c ON c.id = jr.company_id
                {where}
                ORDER BY jr.requested_at DESC LIMIT 100""",
            params,
        )
        return list(await cursor.fetchall())


async def process_join_request(
    request_id: int, reviewer_id: int, approved: bool, company_id: int | None = None
) -> bool:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await connection.begin()
        where = "id = %s AND status = 'PENDING'"
        params: tuple[Any, ...] = (request_id,)
        if company_id is not None:
            where += " AND company_id = %s"
            params = (request_id, company_id)
        await cursor.execute(f"SELECT * FROM join_requests WHERE {where} FOR UPDATE", params)
        row = await cursor.fetchone()
        if not row:
            await connection.rollback()
            return False
        status = "APPROVED" if approved else "REJECTED"
        await cursor.execute(
            """UPDATE join_requests SET status = %s, reviewed_by = %s,
                      reviewed_at = CURRENT_TIMESTAMP WHERE id = %s""",
            (status, reviewer_id, request_id),
        )
        if approved:
            # 시스템 회사로 들어오면 역할도 함께 올린다 (2026-09-06 사용자 확정).
            role = await role_for_company(int(row["company_id"]))
            await cursor.execute(
                """UPDATE users SET company_id = %s, status = 'ACTIVE', role = %s
                   WHERE id = %s""",
                (row["company_id"], role, row["user_id"]),
            )
        else:
            await cursor.execute(
                "UPDATE users SET status = 'REJECTED' WHERE id = %s", (row["user_id"],)
            )
        await connection.commit()
        return True


async def list_all_companies() -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT c.id, c.name, c.business_registration_number, c.business_status,
                      c.business_address, c.business_owner,
                      c.logo_asset_id, c.created_at, COUNT(DISTINCT u.id) AS user_count,
                      COUNT(DISTINCT p.id) AS project_count
               FROM companies c
               LEFT JOIN users u ON u.company_id = c.id AND u.deleted_at IS NULL
               LEFT JOIN projects p ON p.company_id = c.id AND p.deleted_at IS NULL
               WHERE c.deleted_at IS NULL GROUP BY c.id ORDER BY c.created_at DESC"""
        )
        return list(await cursor.fetchall())