"""
LinkSyncServer - Collection CRUD Endpoints
"""

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from typing import List, Optional
import uuid

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


class CollectionCreate(BaseModel):
    name: str
    description: Optional[str] = None
    query_type: str  # "static" or "dynamic"
    query_expression: Optional[dict] = None
    is_public: bool = False


class CollectionUpdate(BaseModel):
    name: Optional[str] = None
    description: Optional[str] = None
    query_type: Optional[str] = None
    query_expression: Optional[dict] = None
    is_public: Optional[bool] = None


class CollectionResponse(BaseModel):
    id: str
    name: str
    description: Optional[str]
    query_type: str
    query_expression: Optional[dict]
    is_public: bool
    created_at: str
    updated_at: str


def mock_create_collection(data: CollectionCreate) -> CollectionResponse:
    """Create collection (mock implementation)."""
    return {
        "id": str(uuid.uuid4()),
        "name": data.name,
        "description": data.description,
        "query_type": data.query_type,
        "query_expression": data.query_expression,
        "is_public": data.is_public,
        "created_at": "2026-05-11T00:00:00Z",
        "updated_at": "2026-05-11T00:00:00Z"
    }


def mock_get_collections() -> List[CollectionResponse]:
    """Get all collections (mock implementation)."""
    return [
        {
            "id": str(uuid.uuid4()),
            "name": "Work Links",
            "description": "Links for work use",
            "query_type": "dynamic",
            "query_expression": {"operation": "OR", "operands": [{"operation": "TERM", "value": "work"}]},
            "is_public": False,
            "created_at": "2026-05-11T00:00:00Z",
            "updated_at": "2026-05-11T00:00:00Z"
        }
    ]


def mock_get_collection(collection_id: str) -> CollectionResponse | None:
    """Get collection by ID (mock implementation)."""
    if collection_id == "mock-id":
        return {
            "id": "mock-id",
            "name": "Work Links",
            "description": "Links for work use",
            "query_type": "dynamic",
            "query_expression": {"operation": "OR", "operands": [{"operation": "TERM", "value": "work"}]},
            "is_public": False,
            "created_at": "2026-05-11T00:00:00Z",
            "updated_at": "2026-05-11T00:00:00Z"
        }
    return None


def mock_update_collection(collection_id: str, data: CollectionUpdate) -> CollectionResponse | None:
    """Update collection."""
    return mock_get_collection(collection_id)


def mock_delete_collection(collection_id: str) -> bool:
    """Delete collection."""
    return True


def mock_execute_query(query_expression: dict) -> List[dict]:
    """Execute query against bookmarks (mock implementation)."""
    return [
        {
            "id": str(uuid.uuid4()),
            "url": "https://example.com/work",
            "title": "Work Example",
            "description": "An example",
            "notes": "",
            "tags": ["work"],
            "favicon_url": None,
            "path": "/Work",
            "created_at": "2026-05-11T00:00:00Z",
            "updated_at": "2026-05-11T00:00:00Z",
            "visit_count": 0,
            "is_bookmarked": False,
            "source_set_id": None
        }
    ]


@router.get("/", response_model=List[CollectionResponse])
async def list_collections():
    """List all collections."""
    return mock_get_collections()


@router.get("/{collection_id}", response_model=CollectionResponse)
async def get_collection(collection_id: str):
    """Get collection by ID."""
    collection = mock_get_collection(collection_id)
    if not collection:
        raise HTTPException(status_code=404, detail="Collection not found")
    return collection


@router.post("/", response_model=CollectionResponse, status_code=status.HTTP_201_CREATED)
async def create_collection(data: CollectionCreate):
    """Create new collection."""
    collection = mock_create_collection(data)
    return collection


@router.put("/{collection_id}", response_model=CollectionResponse)
async def update_collection(
    collection_id: str,
    data: CollectionUpdate
):
    """Update collection."""
    collection = mock_update_collection(collection_id, data)
    if not collection:
        raise HTTPException(status_code=404, detail="Collection not found")
    return collection


@router.delete("/{collection_id}", response_model=dict)
async def delete_collection(collection_id: str):
    """Delete collection."""
    success = mock_delete_collection(collection_id)
    if not success:
        raise HTTPException(status_code=404, detail="Collection not found")
    return {"message": "Collection deleted successfully"}


@router.post("/{collection_id}/refresh", response_model=dict)
async def refresh_collection(collection_id: str):
    """Refresh dynamic collection (re-evaluate query)."""
    return {"message": "Collection refreshed successfully"}


@router.post("/execute", response_model=List[dict])
async def execute_query(query_expression: dict):
    """Execute query and return result set."""
    return mock_execute_query(query_expression)