import { generateId } from "@/lib/id"
import { mockFavorites } from "@/lib/mock"
import type { Favorite } from "@/lib/types"
import { create } from "zustand"

interface FavoriteState {
  favorites: Favorite[]
  listFavoritesByUser: (userId: string) => Favorite[]
  isFavorited: (userId: string, targetType: "player" | "shop", targetId: string) => boolean
  toggleFavorite: (userId: string, targetType: "player" | "shop", targetId: string) => boolean
}

export const useFavoriteStore = create<FavoriteState>((set, get) => ({
  favorites: mockFavorites,
  listFavoritesByUser: (userId) => get().favorites.filter((favorite) => favorite.userId === userId),
  isFavorited: (userId, targetType, targetId) =>
    get().favorites.some(
      (favorite) =>
        favorite.userId === userId &&
        favorite.targetType === targetType &&
        favorite.targetId === targetId,
    ),
  toggleFavorite: (userId, targetType, targetId) => {
    const state = get()
    const existing = state.favorites.find(
      (favorite) =>
        favorite.userId === userId &&
        favorite.targetType === targetType &&
        favorite.targetId === targetId,
    )

    if (existing) {
      set((prev) => ({
        favorites: prev.favorites.filter((favorite) => favorite.id !== existing.id),
      }))
      return false
    }

    const next: Favorite = {
      id: generateId("fav"),
      userId,
      targetType,
      targetId,
      createdAt: new Date().toISOString(),
    }

    set((prev) => ({
      favorites: [next, ...prev.favorites],
    }))
    return true
  },
}))