"""B02_ProjRegister aiomysql Raw SQL 저장소."""

from __future__ import annotations

from datetime import datetime
from pathlib import Path
from typing import Any
from uuid import uuid4

import aiomysql

from common_util.common_util_json import atomic_write_json
from common_util.common_util_storage import PROJECT_STORAGE_LAYOUT_V2
from common_util.common_util_workflow import load_project_workflow
from config.config_db import get_db_pool
from config.config_system import STORAGE_BASE_DIR


def _build_project_storage(company_id: int, user_id: int, project_id: str) -> tuple[str, Path]:
    relative_path = f"storage/{company_id}/{user_id}/{project_id}"
    storage_root = Path(STORAGE_BASE_DIR).resolve()
    project_root = (storage_root / str(company_id) / str(user_id) / project_id).resolve()
    if storage_root not in (project_root, *project_root.parents):
        raise ValueError("프로젝트 저장 경로가 저장소 루트를 벗어났습니다.")
    return relative_path, project_root


def _initialize_project_storage(project_root: Path, project_id: str) -> None:
    for stage, subdir in PROJECT_STORAGE_LAYOUT_V2:
        (project_root / stage / subdir).mkdir(parents=True, exist_ok=True)
    atomic_write_json(project_root / "workflow.json", load_project_workflow(project_root))
    atomic_write_json(
        project_root / "project_manifest.json",
        {
            "project_id": project_id,
            "storage_version": 2,
            "created_at": datetime.utcnow().isoformat(timespec="seconds"),
            "stages": [f"{stage}/{subdir}" for stage, subdir in PROJECT_STORAGE_LAYOUT_V2],
        },
    )


async def create_project(
    *,
    user_id: int,
    company_id: int,
    name: str,
    region: str,
    road_type: str,
    project_year: int,
    estimated_length_m: float | None,
    memo: str | None,
) -> dict[str, Any]:
    """신규 프로젝트를 DB에 저장하고 워크플로우 저장소를 초기화한다."""

    project_id = str(uuid4())
    storage_path, project_root = _build_project_storage(company_id, user_id, project_id)
    now = datetime.utcnow()

    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        try:
            await connection.begin()
            await cursor.execute(
                """
                INSERT INTO projects (
                    id, user_id, company_id, name, region, road_type,
                    project_year, estimated_length_m, memo, status,
                    crs_epsg, storage_path, created_at, updated_at
                )
                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, 'NEW', 5178, %s, %s, %s)
                """,
                (
                    project_id,
                    user_id,
                    company_id,
                    name,
                    region,
                    road_type,
                    project_year,
                    estimated_length_m,
                    memo,
                    storage_path,
                    now,
                    now,
                ),
            )
            await cursor.execute(
                """INSERT INTO system_audit_logs (user_id, action, resource_type, resource_id)
                   VALUES (%s, 'PROJECT_CREATE', 'project', NULL)""",
                (user_id,),
            )
            _initialize_project_storage(project_root, project_id)
            await connection.commit()
        except Exception:
            await connection.rollback()
            raise

        await cursor.execute(
            """
            SELECT id AS project_id, name, region, road_type, project_year,
                   estimated_length_m, memo, status, storage_path,
                   DATE_FORMAT(created_at, '%%Y-%%m-%%dT%%H:%%i:%%s') AS created_at
            FROM projects
            WHERE id = %s
            """,
            (project_id,),
        )
        row = await cursor.fetchone()

    if not row:
        raise RuntimeError("생성된 프로젝트를 다시 조회할 수 없습니다.")
    return dict(row)


async def get_project_by_id(project_id: str) -> dict[str, Any] | None:
    """프로젝트 단건 조회."""

    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """
            SELECT id AS project_id, user_id, company_id, name, region, road_type,
                   project_year, estimated_length_m, memo, status, storage_path,
                   DATE_FORMAT(created_at, '%%Y-%%m-%%dT%%H:%%i:%%s') AS created_at
            FROM projects
            WHERE id = %s AND deleted_at IS NULL
            """,
            (project_id,),
        )
        return await cursor.fetchone()