"""D01 예정노선 등록 API · 대시보드 「받은 예정노선」 (요구 345 · 요구서 3-1 · 2-2).

화면은 이름 · 시작 연도 · 사업 지역만 보냄(요구서 389 3장 1 · 3) — 끝 연도 = 시작 · 임도 종류 없음
= 설계속도 작업임도 20 · 측점 없음(DB 칸 그대로).
"""

import json
from typing import Any

import aiomysql
from fastapi import APIRouter, Depends, HTTPException, Request
from pydantic import BaseModel, Field

from B05_Profile.B05_Profile_Engine_Grade import resolve_design_speed
from B05_Profile.B05_Profile_PageSettings import grade_class_of
from common_util.common_util_auth import is_forest_service, require_company
from common_util.common_util_project_kind import create_kind_project
from config.config_db import get_db_pool

router = APIRouter(prefix="/api/d01", tags=["D01_PlanRegister"])
dashboard_router = APIRouter(prefix="/api/dashboard", tags=["D01_PlanRegister"])


class CreatePlanRequest(BaseModel):
    project_name: str = Field(..., min_length=1, max_length=255)
    project_year: int = Field(..., ge=2000, le=2100)
    project_year_end: int | None = Field(default=None, ge=2000, le=2100)
    region: str = Field(..., min_length=1, max_length=100)
    road_type: str | None = Field(default=None, pattern="^(main|fire|work)$")
    design_speed_kph: int | None = None
    start_chainage_m: float | None = Field(default=None, ge=0)
    end_chainage_m: float | None = Field(default=None, ge=0)


@router.post("/project")
async def post_plan_project(
    request: Request,
    payload: CreatePlanRequest,
    session: dict[str, Any] = Depends(require_company),
) -> dict[str, str]:
    """예정노선 프로젝트 생성 — 산림청(시스템관리자 · *.go.kr)만."""
    if not is_forest_service(session):
        raise HTTPException(status_code=403, detail="예정노선은 산림청만 만들 수 있습니다.")
    if session.get("company_id") is None:
        raise HTTPException(status_code=403, detail="회사 연결이 필요합니다.")
    year_end = payload.project_year_end or payload.project_year
    if year_end < payload.project_year:
        raise HTTPException(status_code=400, detail="사업연도 끝이 시작보다 앞입니다.")
    start_m, end_m = payload.start_chainage_m, payload.end_chainage_m
    if start_m is not None and end_m is not None and start_m >= end_m:
        raise HTTPException(
            status_code=400, detail="노선 시작 누가거리는 종료 누가거리보다 작아야 합니다."
        )
    speed = resolve_design_speed(grade_class_of(payload.road_type, {}), payload.design_speed_kph)
    project_id = await create_kind_project(
        request=request,
        user_id=int(session["user_id"]),
        company_id=int(session["company_id"]),
        kind="PLAN",
        name=payload.project_name.strip(),
        region=payload.region.strip(),
        road_type=payload.road_type,
        project_year=payload.project_year,
        project_year_end=year_end,
        design_speed_kph=speed,
        route_start_m=start_m,
        route_end_m=end_m,
    )
    return {"project_id": project_id}


@dashboard_router.get("/plan-routes/assigned")
async def assigned_plan_routes(
    session: dict[str, Any] = Depends(require_company),
) -> dict[str, Any]:
    """우리 회사에 지정된 예정노선 조각(옛 = 연도) — 확정된 것(또는 이미 연결한 것) · 연결 상태 ·
    업데이트 · 조각 이름 · 길이(조각 행 · 옛 = 연도 행)."""
    from D04_PlanConfirm import D04_PlanConfirm_Repository as plan_repo
    from D04_PlanConfirm.D04_PlanConfirm_Link import update_available
    from D04_PlanConfirm.D04_PlanConfirm_Router import piece_label

    async with (
        get_db_pool().acquire() as connection,
        connection.cursor(aiomysql.DictCursor) as cursor,
    ):
        await cursor.execute(
            """SELECT a.id AS assignee_id, a.project_id, p.name AS project_name, a.year,
                      a.piece_id, c.length_m AS piece_length_m,
                      l.id AS linked_project_id, l.name AS linked_project_name,
                      l.source_fingerprint, COALESCE(c.route_json, y.route_json) AS route_json,
                      y.confirmed_at
               FROM plan_route_assignees a
               JOIN projects p ON p.id = a.project_id AND p.deleted_at IS NULL
               LEFT JOIN plan_route_years y ON y.project_id = a.project_id AND y.year = a.year
               LEFT JOIN plan_route_pieces c
                 ON c.project_id = a.project_id AND c.piece_id = a.piece_id
               LEFT JOIN projects l ON l.id = a.linked_project_id AND l.deleted_at IS NULL
               WHERE a.company_id = %s
                 AND (y.confirmed_at IS NOT NULL OR l.id IS NOT NULL)
               ORDER BY p.name, a.year, a.piece_id""",
            (session.get("company_id"),),
        )
        rows = await cursor.fetchall()
    pieces: dict[tuple[str, str], dict[str, Any]] = {}
    for project_id in {r["project_id"] for r in rows if r.get("piece_id")}:
        for piece in await plan_repo.list_pieces(str(project_id)):
            pieces[(str(project_id), piece["piece_id"])] = piece
    routes = []
    for row in rows:
        route_json, fingerprint = row.pop("route_json"), row.pop("source_fingerprint")
        piece_length = row.pop("piece_length_m", None)
        confirmed = row["confirmed_at"] is not None
        body = json.loads(route_json) if isinstance(route_json, str | bytes) else route_json
        piece = pieces.get((str(row["project_id"]), row.get("piece_id")))
        routes.append(
            {
                **row,
                "piece_id": row.get("piece_id"),
                "piece_label": piece
                and piece_label(piece["line_name"], piece["from_m"], piece["to_m"]),
                "length_m": piece_length
                if piece_length is not None
                else (body or {}).get("length_m"),
                "update_available": update_available(route_json, fingerprint, confirmed),
            }
        )
    return {"status": "success", "routes": routes}