"""프로젝트 카드 요약 (PLAN 547-1) — 홈 · 목록 · 상세 카드가 같이 씀.

단계 = 대시보드 표 단계 막대와 같은 값(`workflow_state.current_stage` · 종류별 단계 목록).
썸네일 = 최신 노선 경로 GeoJSON(B05 정본) 중심선을 100 점 안쪽으로 줄여 0~1 칸에 맞춤
(가로세로 비 유지 · 가운데 · y 는 화면 방향 = 아래로 커짐). 값이 없으면 칸을 뺌.
쿼리 = 프로젝트 · 단계 · 참여자 · 노선 · 측점 다섯 번(개수와 무관) + 노선 · 구조물 파일 읽기.
"""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any

import aiomysql

from common_util.common_util_time import utc_now_naive, utc_text
from config.config_db import get_db_pool
from M02_MasterTemplete.M02_Template_Migrate import project_root

from .B01_Dashboard_Repository import get_workflow_states_for_projects

THUMB_POINTS = 100

# 단계 이름 = 화면 단계 막대 글(ui_template_locale_common · _de) 한국어 · 모르는 종류 = 임도
STAGE_NAMES: dict[str, tuple[str, ...]] = {
    "ROAD": ("파일입력", "전처리", "노선설계", "횡단설계", "상세설계", "수량산출", "원가계산"),
    "PLAN": ("예정노선", "확정 · 내보내기"),
    "STABILITY": ("지반 조건", "2D 해석", "3D 해석", "암반 해석", "광역 위험", "보고서"),
}


def stage_names(kind: str | None) -> tuple[str, ...]:
    return STAGE_NAMES.get(kind or "ROAD", STAGE_NAMES["ROAD"])


def thumb_line(points: list[list[float]], limit: int = THUMB_POINTS) -> list[list[float]] | None:
    """중심선 → limit 점 안쪽 · 0~1 칸(가로세로 비 유지 · y 아래로). 두 점 못 되면 None."""
    if len(points) < 2:
        return None
    if len(points) > limit:
        last = len(points) - 1
        points = [points[round(i * last / (limit - 1))] for i in range(limit)]
    xs = [p[0] for p in points]
    ys = [p[1] for p in points]
    dx, dy = max(xs) - min(xs), max(ys) - min(ys)
    span = max(dx, dy) or 1.0
    ox, oy = (1 - dx / span) / 2, (1 - dy / span) / 2
    return [
        [round(ox + (x - min(xs)) / span, 4), round(1 - oy - (y - min(ys)) / span, 4)]
        for x, y in zip(xs, ys, strict=True)
    ]


def _route_points(root: Path | None, route_data_path: str | None) -> list[list[float]]:
    from B05_Profile.B05_Profile_Engine_Sections import _load_route_polyline

    if root is None or not route_data_path:
        return []
    try:
        return [[x, y] for x, y, _ in _load_route_polyline(root, route_data_path)]
    except (OSError, ValueError):
        return []


def _structure_count(root: Path | None) -> int | None:
    from B05_Profile.B05_Profile_Structures_Repository import structures_file_path

    if root is None:
        return None
    try:
        with open(structures_file_path(str(root)), encoding="utf-8") as handle:
            items = json.load(handle).get("structures")
    except (OSError, ValueError, AttributeError):
        return None
    return len(items) if isinstance(items, list) else None


def _marks(values: list[Any]) -> str:
    return ", ".join(["%s"] * len(values))


async def project_summaries(project_ids: list[str]) -> list[dict[str, Any]]:
    """프로젝트 여럿 → 카드 요약(넣은 차례 · 지운 · 없는 프로젝트는 빠짐)."""
    ids = list(dict.fromkeys(str(pid) for pid in project_ids))
    if not ids:
        return []
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            f"""SELECT p.id, p.name, p.project_kind, p.region, p.updated_at, p.storage_path,
                       p.company_id, p.user_id, u.name AS owner_name
                FROM projects p LEFT JOIN users u ON u.id = p.user_id
                WHERE p.id IN ({_marks(ids)}) AND p.deleted_at IS NULL""",
            tuple(ids),
        )
        rows = {str(r["id"]): r for r in await cursor.fetchall()}
        states = await get_workflow_states_for_projects(cursor, list(rows))
        await cursor.execute(
            f"""SELECT m.project_id, u.name FROM project_members m
                JOIN users u ON u.id = m.user_id AND u.deleted_at IS NULL
                WHERE m.project_id IN ({_marks(ids)}) ORDER BY u.name""",
            tuple(ids),
        )
        members: dict[str, list[str]] = {}
        for r in await cursor.fetchall():
            members.setdefault(str(r["project_id"]), []).append(r["name"])
        # 최신 노선 = B05 get_latest_route 와 같은 차례(computed_at · id 내림)
        await cursor.execute(
            f"""SELECT id, project_id, total_length_m, route_data_path FROM routes
                WHERE project_id IN ({_marks(ids)})
                ORDER BY computed_at DESC, id DESC""",
            tuple(ids),
        )
        routes: dict[str, dict[str, Any]] = {}
        for r in await cursor.fetchall():
            routes.setdefault(str(r["project_id"]), r)
        stations: dict[int, int] = {}
        route_ids = [int(r["id"]) for r in routes.values()]
        if route_ids:
            await cursor.execute(
                f"""SELECT route_id, COUNT(*) AS n FROM cross_sections
                    WHERE route_id IN ({_marks(route_ids)}) GROUP BY route_id""",
                tuple(route_ids),
            )
            stations = {int(r["route_id"]): int(r["n"]) for r in await cursor.fetchall()}

    now = utc_now_naive()
    result = []
    for pid in ids:
        row = rows.get(pid)
        if row is None:
            continue
        state = states.get(pid, {"current_stage": 0, "stages": []})
        names = stage_names(row.get("project_kind"))
        index = min(int(state["current_stage"]), len(names) - 1)
        stages = state["stages"]
        root = project_root(row.get("storage_path"))
        route = routes.get(pid)
        metrics: dict[str, Any] = {}
        if route and route.get("total_length_m") is not None:
            metrics["length_m"] = round(float(route["total_length_m"]), 1)
        if route and stations.get(int(route["id"])):
            metrics["stations"] = stations[int(route["id"])]
        structures = _structure_count(root)
        if structures is not None:
            metrics["structures"] = structures
        owners = [row["owner_name"]] if row.get("owner_name") else []
        owners += [name for name in members.get(pid, []) if name and name not in owners]
        updated = row.get("updated_at")
        result.append(
            {
                "id": pid,
                "name": row["name"],
                "kind": row.get("project_kind") or "ROAD",
                "region": row.get("region"),
                "company_id": row.get("company_id"),
                "stage_index": index,
                "stage_total": len(names),
                "stage_name": names[index],
                "done": bool(stages) and all(s["state"] == "COMPLETE" for s in stages),
                "updated_at": utc_text(updated),
                "stale_days": (now - updated).days if updated else None,
                "owner_user_id": row.get("user_id"),
                "owner_names": owners,
                "thumb": thumb_line(
                    _route_points(root, route.get("route_data_path")) if route else []
                ),
                "metrics": metrics,
            }
        )
    return result