<?php

namespace App\Livewire\Pages;

use Livewire\Component;
use App\Models\Artist;
use App\Models\Song;

class SearchSong extends Component
{
    public string $search = '';
    public $searchCategory = '';
    public $selectedLanguage = '國語'; // 預設語言
    public $selectedArtists = []; // 儲存已選的歌手 id
    public $artistOptions = [];   // API 回傳的搜尋結果
    public string $artistSearch = ''; // 即時搜尋文字

    /**
     * 初始化（接收外部傳入的分類參數）
     */
    public function mount(string $searchCategory = '')
    {
        $this->searchCategory = $searchCategory;
    }

    /**
     * 切換語言標籤
     */
    public function selectLanguage(string $lang): void
    {
        $this->selectedLanguage = $lang;
    }
    /**
     * 搜尋歌手（透過 API）
     */
    public function updatedArtistSearch()
    {
        $search = $this->artistSearch;

        if ($search) {
            // 即時搜尋歌手，從資料庫查詢
            $this->artistOptions = \App\Models\Artist::query()
                ->where('name', 'like', "{$search}%")
                ->limit(100)
                ->get(['id', 'name'])
                ->toArray();
        } else {
            $this->artistOptions = [];
        }
    }
    public function addArtist($id, $name)
    {
        $this->selectedArtists[$id] = $name;
        $this->artistSearch = ''; // 清空搜尋框
        $this->artistOptions = [];
    }

    public function removeArtist($id)
    {
        unset($this->selectedArtists[$id]);
    }

    /**
     * 點歌
     */
    public function orderSong(int $songId): void
    {
        // TODO: 加入已點歌曲邏輯，例如：
        // auth()->user()->room->addSong($songId);

        $this->dispatchBrowserEvent('notify', [
            'message' => '已加入已點歌曲'
        ]);
    }

    /**
     * 取得歌曲清單
     */
    protected function loadSongs()
    {
        return Song::query()
        ->when($this->search, fn($q) => $q->where('name', 'like', "%{$this->search}%"))
        ->when($this->selectedLanguage, fn($q) => $q->where('language_type', $this->selectedLanguage))
        ->when($this->selectedArtists, fn ($q) => $q->whereHas('artists', fn ($q2) => $q2->whereIn('id', array_keys($this->selectedArtists))))
        ->when($this->searchCategory === 'New', fn($q) => $q->orderByDesc('created_at'))
        ->when($this->searchCategory === 'Hot', fn($q) => $q->orderByDesc('song_counts'), fn($q) => $q->orderByDesc('id'))
        //->take($this->search || $this->artistSearch ? 100 : 1000)
        ->take(1000)
        ->get();
    }

    /**
     * Render
     */
    public function render()
    {
        $songs = $this->loadSongs();

        return view('livewire.pages.search-song', [
            'songs' => $songs,
            'languages' => \App\Enums\SongLanguageType::options(),
            'selectedLanguage' => $this->selectedLanguage,
        ]);
    }
}