"""D04 확정 · 업체 지정 DB (Raw SQL · 표는 db_management/020_project_groups.sql)."""

from __future__ import annotations

import json
from typing import Any

import aiomysql

from config.config_db import get_db_pool


async def get_plan_project(project_id: str) -> dict[str, Any] | None:
    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            "SELECT id, name, region, project_kind, route_start_m FROM projects"
            " WHERE id = %s AND deleted_at IS NULL",
            (project_id,),
        )
        return await cursor.fetchone()


async def list_year_routes(project_id: str) -> list[dict[str, Any]]:
    """연도 구간(오름차순) — `route_json` 은 파싱해서 돌려줌(없으면 None)."""
    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            "SELECT year, epsg, route_json, fingerprint, confirmed_at FROM plan_route_years"
            " WHERE project_id = %s ORDER BY year",
            (project_id,),
        )
        rows = await cursor.fetchall()
    for row in rows:
        raw = row["route_json"]
        row["route_json"] = json.loads(raw) if isinstance(raw, str | bytes) else raw
    return rows


async def list_pieces(project_id: str) -> list[dict[str, Any]]:
    """조각 행(연도 · 선 차례 · 선 위 거리 차례) + `line_name`(본선 · 갈래 N = 정본 선 차례)."""
    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            "SELECT piece_id, line_id, year, from_m, to_m, length_m, epsg, route_json"
            " FROM plan_route_pieces WHERE project_id = %s",
            (project_id,),
        )
        rows = list(await cursor.fetchall())
        await cursor.execute(
            "SELECT network_json FROM plan_networks WHERE project_id = %s", (project_id,)
        )
        network = await cursor.fetchone()
    lines = []
    if network:
        raw = network["network_json"]
        body = json.loads(raw) if isinstance(raw, str | bytes) else raw
        lines = [line["id"] for line in (body or {}).get("lines", [])]
    order = {line: i for i, line in enumerate(lines)}
    for row in rows:
        raw = row["route_json"]
        row["route_json"] = json.loads(raw) if isinstance(raw, str | bytes) else raw
        index = order.get(row["line_id"], len(order))
        row["line_name"] = "본선" if index == 0 else f"갈래 {index}"
    rows.sort(key=lambda r: (r["year"], order.get(r["line_id"], len(order)), r["from_m"]))
    return rows


async def list_assignees(project_id: str) -> list[dict[str, Any]]:
    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            "SELECT id, year, piece_id, company_id, company_name, email, notified_at,"
            " linked_project_id"
            " FROM plan_route_assignees WHERE project_id = %s ORDER BY year, id",
            (project_id,),
        )
        return await cursor.fetchall()


async def get_company_contact(company_id: int) -> dict[str, Any] | None:
    """등록 회사 이름 + 대표 메일(회사 마스터 사용자)."""
    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            "SELECT c.id, c.name, u.email FROM companies c"
            " LEFT JOIN users u ON u.id = c.master_user_id AND u.deleted_at IS NULL"
            " WHERE c.id = %s AND c.deleted_at IS NULL",
            (company_id,),
        )
        return await cursor.fetchone()


async def apply_assignee_changes(
    project_id: str, delete_ids: list[int], updates: list[dict], inserts: list[dict]
) -> None:
    async with get_db_pool().acquire() as connection, connection.cursor() as cursor:
        await connection.begin()
        try:
            for assignee_id in delete_ids:
                await cursor.execute(
                    "DELETE FROM plan_route_assignees WHERE id = %s AND project_id = %s",
                    (assignee_id, project_id),
                )
            for row in updates:
                await cursor.execute(
                    "UPDATE plan_route_assignees SET company_name = %s, email = %s"
                    " WHERE id = %s AND project_id = %s",
                    (row["company_name"], row["email"], row["id"], project_id),
                )
            for row in inserts:
                await cursor.execute(
                    "INSERT INTO plan_route_assignees"
                    " (project_id, year, piece_id, company_id, company_name, email)"
                    " VALUES (%s,%s,%s,%s,%s,%s)",
                    (
                        project_id,
                        row["year"],
                        row.get("piece_id"),
                        row["company_id"],
                        row["company_name"],
                        row["email"],
                    ),
                )
            await connection.commit()
        except Exception:
            await connection.rollback()
            raise


async def mark_confirmed(project_id: str, years: list[int]) -> None:
    if not years:
        return
    marks = ",".join(["%s"] * len(years))
    async with get_db_pool().acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            f"UPDATE plan_route_years SET confirmed_at = NOW() WHERE project_id = %s"
            f" AND year IN ({marks})",
            (project_id, *years),
        )
        await connection.commit()


async def mark_notified(assignee_id: int) -> None:
    async with get_db_pool().acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            "UPDATE plan_route_assignees SET notified_at = NOW() WHERE id = %s", (assignee_id,)
        )
        await connection.commit()