"""
快捷门户入口：持久化在 data/portal_links.json，支持增删改查。
"""
import json
import uuid
from pathlib import Path
from typing import Any, Dict, List

from fastapi import APIRouter, HTTPException, status
from pydantic import BaseModel, Field

router = APIRouter(prefix="/settings/portal-links", tags=["portal-links"])

CONFIG_PATH = Path("data/portal_links.json")


class PortalLinkCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=64, description="显示名称")
    url: str = Field(..., min_length=1, max_length=512, description="门户 URL")


class PortalLinkRead(BaseModel):
    id: str
    name: str
    url: str


class PortalLinkUpdate(BaseModel):
    name: str | None = Field(None, min_length=1, max_length=64)
    url: str | None = Field(None, min_length=1, max_length=512)


def _load_links() -> List[Dict[str, Any]]:
    if not CONFIG_PATH.exists():
        return []
    try:
        data = json.loads(CONFIG_PATH.read_text(encoding="utf-8"))
        return data if isinstance(data, list) else []
    except Exception:
        return []


def _save_links(links: List[Dict[str, Any]]) -> None:
    CONFIG_PATH.parent.mkdir(parents=True, exist_ok=True)
    CONFIG_PATH.write_text(
        json.dumps(links, ensure_ascii=False, indent=2),
        encoding="utf-8",
    )


@router.get("", response_model=List[PortalLinkRead])
async def list_portal_links():
    """获取所有快捷门户入口。"""
    links = _load_links()
    return [PortalLinkRead(**x) for x in links]


@router.post("", response_model=PortalLinkRead, status_code=status.HTTP_201_CREATED)
async def create_portal_link(payload: PortalLinkCreate):
    """新增一条快捷门户入口。"""
    links = _load_links()
    new_id = str(uuid.uuid4())[:8]
    new_item = {"id": new_id, "name": payload.name.strip(), "url": payload.url.strip()}
    links.append(new_item)
    _save_links(links)
    return PortalLinkRead(**new_item)


@router.put("/{link_id}", response_model=PortalLinkRead)
async def update_portal_link(link_id: str, payload: PortalLinkUpdate):
    """更新名称或 URL。"""
    links = _load_links()
    for item in links:
        if item.get("id") == link_id:
            if payload.name is not None:
                item["name"] = payload.name.strip()
            if payload.url is not None:
                item["url"] = payload.url.strip()
            _save_links(links)
            return PortalLinkRead(**item)
    raise HTTPException(status_code=404, detail="快捷门户入口不存在")


@router.delete("/{link_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_portal_link(link_id: str):
    """删除一条快捷门户入口。"""
    links = _load_links()
    new_list = [x for x in links if x.get("id") != link_id]
    if len(new_list) == len(links):
        raise HTTPException(status_code=404, detail="快捷门户入口不存在")
    _save_links(new_list)