"""Review API routes."""

from __future__ import annotations

from datetime import date
from typing import Optional

from fastapi import APIRouter, Depends, HTTPException, Query
from pydantic import BaseModel, Field

from core import review
from api.deps import get_current_user

router = APIRouter()


class ReviewCreate(BaseModel):
    rating: float = Field(..., ge=0.5, le=5.0)
    review_text: Optional[str] = None
    visited_at: Optional[date] = None


class ReviewUpdate(BaseModel):
    rating: Optional[float] = Field(None, ge=0.5, le=5.0)
    review_text: Optional[str] = None
    visited_at: Optional[date] = None


# --- Restaurant reviews ---

@router.get("/restaurants/{restaurant_id}/reviews")
def list_restaurant_reviews(
    restaurant_id: str,
    limit: int = Query(20, le=100),
    offset: int = Query(0, ge=0),
):
    """List reviews for a restaurant (public)."""
    reviews = review.get_reviews_for_restaurant(restaurant_id, limit=limit, offset=offset)
    stats = review.get_restaurant_avg_rating(restaurant_id)
    return {"reviews": reviews, **stats}


@router.post("/restaurants/{restaurant_id}/reviews", status_code=201)
def create_restaurant_review(
    restaurant_id: str,
    body: ReviewCreate,
    current_user: dict = Depends(get_current_user),
):
    """Create a review for a restaurant (requires auth)."""
    created = review.create_review(
        user_id=current_user["sub"],
        restaurant_id=restaurant_id,
        rating=body.rating,
        review_text=body.review_text,
        visited_at=body.visited_at,
    )
    return created


@router.put("/reviews/{review_id}")
def update_review_route(
    review_id: str,
    body: ReviewUpdate,
    current_user: dict = Depends(get_current_user),
):
    """Update a review (own review only)."""
    updated = review.update_review(
        review_id=review_id,
        user_id=current_user["sub"],
        rating=body.rating,
        review_text=body.review_text,
        visited_at=body.visited_at,
    )
    if not updated:
        raise HTTPException(404, "Review not found or not yours")
    return updated


@router.delete("/reviews/{review_id}", status_code=204)
def delete_review_route(
    review_id: str,
    current_user: dict = Depends(get_current_user),
):
    """Delete a review (own review only)."""
    deleted = review.delete_review(review_id, current_user["sub"])
    if not deleted:
        raise HTTPException(404, "Review not found or not yours")


@router.get("/users/me/reviews")
def list_my_reviews(
    limit: int = Query(20, le=100),
    offset: int = Query(0, ge=0),
    current_user: dict = Depends(get_current_user),
):
    """List current user's reviews."""
    return review.get_user_reviews(current_user["sub"], limit=limit, offset=offset)


# --- Favorites ---

@router.get("/restaurants/{restaurant_id}/favorite")
def get_favorite_status(
    restaurant_id: str,
    current_user: dict = Depends(get_current_user),
):
    """Check if current user has favorited this restaurant."""
    from core.db import conn
    with conn() as c:
        cur = c.cursor()
        cur.execute(
            "SELECT id FROM user_favorites WHERE user_id = :u AND restaurant_id = :r",
            {"u": current_user["sub"], "r": restaurant_id},
        )
        return {"favorited": cur.fetchone() is not None}


@router.post("/restaurants/{restaurant_id}/favorite")
def toggle_favorite(
    restaurant_id: str,
    current_user: dict = Depends(get_current_user),
):
    """Toggle favorite. Returns new state."""
    from core.db import conn
    user_id = current_user["sub"]
    with conn() as c:
        cur = c.cursor()
        cur.execute(
            "SELECT id FROM user_favorites WHERE user_id = :u AND restaurant_id = :r",
            {"u": user_id, "r": restaurant_id},
        )
        row = cur.fetchone()
        if row:
            cur.execute("DELETE FROM user_favorites WHERE id = :fid", {"fid": row[0]})
            return {"favorited": False}
        else:
            cur.execute(
                "INSERT INTO user_favorites (user_id, restaurant_id) VALUES (:u, :r)",
                {"u": user_id, "r": restaurant_id},
            )
            return {"favorited": True}


@router.get("/users/me/favorites")
def list_my_favorites(
    current_user: dict = Depends(get_current_user),
):
    """List current user's favorite restaurants."""
    from core.db import conn
    sql = """
        SELECT r.id, r.name, r.address, r.region, r.latitude, r.longitude,
               r.cuisine_type, r.price_range, r.google_place_id,
               r.business_status, r.rating, r.rating_count,
               f.created_at
        FROM user_favorites f
        JOIN restaurants r ON r.id = f.restaurant_id
        WHERE f.user_id = :u
        ORDER BY f.created_at DESC
    """
    with conn() as c:
        cur = c.cursor()
        cur.execute(sql, {"u": current_user["sub"]})
        cols = [d[0].lower() for d in cur.description]
        rows = [dict(zip(cols, row)) for row in cur.fetchall()]
        for r in rows:
            if r.get("created_at"):
                r["created_at"] = r["created_at"].isoformat()
        return rows