"""«Выбранные»: проектные карточки, стадии, история, напоминания, вложения."""
from __future__ import annotations

from fastapi import APIRouter, Depends, HTTPException, UploadFile
from fastapi.responses import StreamingResponse
from pydantic import BaseModel

from ..auth import current_login
from ..services import files as files_svc
from ..services import object_store
from ..services import projects as proj_svc

router = APIRouter(prefix="/api/projects", tags=["projects"])


class TakeBody(BaseModel):
    leadId: str


class CreateBody(BaseModel):
    title: str = ""
    summary: str = ""
    stack: list[str] | None = None
    budget: dict | None = None
    contact: str = ""
    tzText: str = ""
    stage: str | None = None


class PatchBody(BaseModel):
    title: str | None = None
    summary: str | None = None
    stack: list[str] | None = None
    budget: dict | None = None
    contact: str | None = None
    tzText: str | None = None


class StageBody(BaseModel):
    stage: str


class CommentBody(BaseModel):
    text: str


class LinkBody(BaseModel):
    name: str = ""
    url: str


class ReminderBody(BaseModel):
    at: int  # epoch ms


def _card_or_404(card_id: str) -> dict:
    card = proj_svc.get_card(card_id)
    if not card:
        raise HTTPException(404, "Карточка не найдена")
    return card


@router.get("")
def list_cards(stage: str | None = None, _: str = Depends(current_login)) -> dict:
    return {"items": proj_svc.list_cards(stage)}


@router.get("/reminders")
def reminders(_: str = Depends(current_login)) -> dict:
    return {"items": proj_svc.active_reminders()}


@router.get("/{card_id}")
def get_card(card_id: str, _: str = Depends(current_login)) -> dict:
    return _card_or_404(card_id)


@router.post("")
def create_card(body: CreateBody, _: str = Depends(current_login)) -> dict:
    return proj_svc.create_local_card(body.model_dump())


@router.post("/take")
def take(body: TakeBody, _: str = Depends(current_login)) -> dict:
    """«Взять в работу» — лид безвозвратно уходит с дашборда."""
    try:
        return proj_svc.take_lead_to_projects(body.leadId)
    except KeyError:
        raise HTTPException(404, "Лид не найден")


@router.post("/clear-rejected")
def clear_rejected(_: str = Depends(current_login)) -> dict:
    """Полная очистка стадии «Отклонено» (безвозвратно)."""
    try:
        cleared = proj_svc.clear_stage("rejected")
    except ValueError as exc:
        raise HTTPException(400, str(exc)) from exc
    return {"ok": True, "cleared": cleared}


@router.patch("/{card_id}")
def patch(card_id: str, body: PatchBody, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    return proj_svc.patch_card(card_id, body.model_dump(exclude_none=True))


@router.delete("/{card_id}")
def delete(card_id: str, _: str = Depends(current_login)) -> dict:
    # По решению удаление проектных карточек не делаем — карточка живёт
    # до финального статуса «Выполнено»/«Отклонено».
    raise HTTPException(400, "Удаление проектных карточек отключено")


@router.post("/{card_id}/move")
def move(card_id: str, body: StageBody, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    try:
        return proj_svc.move_stage(card_id, body.stage)
    except ValueError as exc:
        raise HTTPException(400, str(exc)) from exc


@router.post("/{card_id}/comments")
def comment(card_id: str, body: CommentBody, _: str = Depends(current_login)) -> dict:
    if not body.text.strip():
        raise HTTPException(400, "Пустой комментарий")
    return {"comments": proj_svc.add_comment(card_id, body.text)}


# ─── Ссылки ───────────────────────────────────────────────────────────────

@router.post("/{card_id}/links")
def add_link(card_id: str, body: LinkBody, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    url = body.url.strip()
    if not url:
        raise HTTPException(400, "Пустая ссылка")
    if not url.startswith(("http://", "https://")):
        url = "https://" + url
    card = _card_or_404(card_id)
    links = card["links"] + [{"id": f"pl_{card_id[:6]}_{len(card['links'])}", "name": body.name.strip() or url, "url": url}]
    return proj_svc.patch_card(card_id, {"links": links})


@router.delete("/{card_id}/links/{link_id}")
def remove_link(card_id: str, link_id: str, _: str = Depends(current_login)) -> dict:
    card = _card_or_404(card_id)
    links = [l for l in card["links"] if l["id"] != link_id]
    return proj_svc.patch_card(card_id, {"links": links})


# ─── Вложения (мета; MinIO позже) ─────────────────────────────────────────

@router.post("/{card_id}/files")
async def upload_files(card_id: str, files: list[UploadFile], _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    added = []
    for f in files:
        content = await f.read()
        added.append(files_svc.add_file(card_id, f.filename or "file", content, f.content_type or ""))
    return {"items": added}


@router.get("/{card_id}/files/{file_id}/download")
def download_file(card_id: str, file_id: str, _: str = Depends(current_login)):
    entry, _ = files_svc.get_file_entry(card_id, file_id)
    if not entry.get("objectKey"):
        raise HTTPException(410, "Файл не сохранён в объектном хранилище")
    try:
        stream = object_store.get(entry["objectKey"])
    except Exception as exc:  # noqa: BLE001
        raise HTTPException(404, "Файл не найден в MinIO") from exc
    safe_name = entry["name"].replace('"', "")
    return StreamingResponse(
        stream,
        media_type="application/octet-stream",
        headers={"Content-Disposition": f'attachment; filename="{safe_name}"'},
    )


@router.delete("/{card_id}/files/{file_id}")
def remove_file(card_id: str, file_id: str, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    files_svc.remove_file(card_id, file_id)
    return {"ok": True}


# ─── Напоминания об «Отложено» ────────────────────────────────────────────

@router.post("/{card_id}/reminder")
def set_reminder(card_id: str, body: ReminderBody, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    try:
        return proj_svc.set_reminder(card_id, body.at)
    except PermissionError as exc:
        raise HTTPException(400, str(exc)) from exc


@router.delete("/{card_id}/reminder")
def clear_reminder(card_id: str, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    proj_svc.clear_reminder(card_id)
    return {"ok": True}


@router.post("/{card_id}/reminder/snooze")
def snooze(card_id: str, _: str = Depends(current_login)) -> dict:
    _card_or_404(card_id)
    proj_svc.snooze(card_id)
    return {"ok": True}