<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\MusicPlaylist;
use App\Models\Music;
use Illuminate\Support\Facades\Storage;

class MusicController extends Controller
{

    public function index()
    {
        $userId = auth()->id();

        $music = Music::with(['image', 'playlist'])
            ->where('type', 'public')
            ->orWhere(function($query) use ($userId) {
                $query->where('type', 'private')
                      ->where('user_id', $userId);
            })
            ->orderBy('created_at', 'desc')
            ->get();

        return response()->json([
            'data' => $music,
            'total' => $music->count()
        ]);
    }

public function getMusicByPlaylist($playlistId)
    {
        $playlist = MusicPlaylist::findOrFail($playlistId);
        
        $music = Music::where('playlist_id', $playlistId)
            ->where('is_active', true)
            ->with(['image', 'tags'])
            ->orderBy('order')
            ->get();
        
        return response()->json([
            'playlist' => $playlist->load('image'),
            'musics' => $music
        ]);
    }
    
    public function addToPlaylist(Request $request, $musicId)
    {
        $music = Music::where('id', $musicId)
            ->where(function($q) {
                $q->where('type', 'public')
                  ->orWhere('user_id', auth()->id());
            })
            ->firstOrFail();
        
        $data = $request->validate([
            'playlist_id' => 'required|exists:music_playlists,id',
            'order' => 'nullable|integer',
        ]);
        
        $music->update([
            'playlist_id' => $data['playlist_id'],
            'order' => $data['order'] ?? $music->order,
        ]);
        
        return response()->json([
            'message' => 'Music added to playlist successfully',
            'music' => $music->load(['image', 'playlist'])
        ]);
    }
    
    public function removeFromPlaylist($musicId)
    {
        $music = Music::where('id', $musicId)
            ->where('user_id', auth()->id())
            ->firstOrFail();
        
        $music->update(['playlist_id' => null]);
        
        return response()->json(['message' => 'Music removed from playlist']);
    }
    
    public function updateOrder(Request $request)
    {
        $data = $request->validate([
            'musics' => 'required|array',
            'musics.*.id' => 'required|exists:music,id',
            'musics.*.order' => 'required|integer',
        ]);
        
        foreach ($data['musics'] as $item) {
            Music::where('id', $item['id'])
                ->where('user_id', auth()->id())
                ->update(['order' => $item['order']]);
        }
        
        return response()->json(['message' => 'Order updated successfully']);
    }
    // ✅ Upload music
    public function store(Request $request)
    {
        try {
            $data = $request->validate([
                'title' => 'required|string|max:255',
                'artist' => 'nullable|string|max:255',
                'file' => 'required|mimes:mp3,wav,ogg|max:20971520',
                'type' => 'nullable|in:public,private',
                'image_id' => 'nullable|exists:images,id',
                'playlist_id' => 'nullable|exists:music_playlists,id',
                'duration' => 'nullable|string|regex:/^(?:\d+:)?[0-5]?\d:[0-5]\d$/', // validates mm:ss or hh:mm:ss
            ]);

            // Handle file upload
            if (!$request->hasFile('file')) {
                return response()->json([
                    'message' => 'No file was uploaded'
                ], 400);
            }

            $file = $request->file('file');
            
            // Validate file size
            if ($file->getSize() > 20971520) {
                return response()->json([
                    'message' => 'File size exceeds 10MB limit'
                ], 422);
            }

            $path = $file->store('music', 'public');
            
            if (!$path) {
                return response()->json([
                    'message' => 'Failed to store the file'
                ], 500);
            }

            $music = Music::create([
                'user_id' => auth()->id(),
                'title' => $data['title'],
                'artist' => $data['artist'] ?? null,
                'file_path' => $path,
                'type' => $data['type'] ?? 'private',
                'image_id' => $data['image_id'] ?? null,
                'playlist_id' => $data['playlist_id'] ?? null,
                'duration' => $data['duration'] ?? null, // Store as string
                'order' => $this->getNextOrderInPlaylist($data['playlist_id'] ?? null),
                'is_active' => true,
            ]);

            return response()->json([
                'message' => 'Music uploaded successfully',
                'music' => $music->load(['image', 'playlist', 'tags']),
                'url' => asset('storage/' . $path),
            ], 201);
            
        } catch (\Illuminate\Validation\ValidationException $e) {
            return response()->json([
                'message' => 'Validation failed',
                'errors' => $e->errors()
            ], 422);
        } catch (\Exception $e) {
            return response()->json([
                'message' => 'An error occurred while uploading the music',
                'error' => $e->getMessage()
            ], 500);
        }
    }

    // Helper method to get next order number in playlist
    private function getNextOrderInPlaylist($playlistId)
    {
        if (!$playlistId) {
            return 0;
        }
        
        $maxOrder = Music::where('playlist_id', $playlistId)->max('order');
        return ($maxOrder ?? -1) + 1;
    }

    // ✅ Update music with string duration
    public function update(Request $request, $id)
    {
        try {
            $music = Music::where('id', $id)->where('user_id', auth()->id())->firstOrFail();

            $data = $request->validate([
                'title' => 'nullable|string|max:255',
                'artist' => 'nullable|string|max:255',
                'type' => 'nullable|in:public,private',
                'file' => 'nullable|mimes:mp3,wav,ogg|max:10240',
                'image_id' => 'nullable|exists:images,id',
                'playlist_id' => 'nullable|exists:music_playlists,id',
                'duration' => 'nullable|string|regex:/^(?:\d+:)?[0-5]?\d:[0-5]\d$/',
                'order' => 'nullable|integer',
                'is_active' => 'nullable|boolean',
            ]);

            if ($request->hasFile('file')) {
                // Delete old file
                Storage::disk('public')->delete($music->file_path);
                $path = $request->file('file')->store('music', 'public');
                $music->file_path = $path;
            }

            // Update only provided fields
            $music->fill($data);
            $music->save();

            return response()->json([
                'message' => 'Music updated successfully',
                'music' => $music->load(['image', 'playlist', 'tags']),
                'url' => asset('storage/' . $music->file_path),
            ]);
            
        } catch (\Exception $e) {
            return response()->json([
                'message' => 'An error occurred while updating the music',
                'error' => $e->getMessage()
            ], 500);
        }
    }


    // ✅ Get all public + user private music
    public function show($id)
{
    $userId = auth()->id();

    $music = Music::with(['image', 'playlist', 'tags'])
        ->where(function($query) use ($userId) {
            $query->where('type', 'public')
                  ->orWhere(function($q) use ($userId) {
                      $q->where('type', 'private')
                        ->where('user_id', $userId);
                  });
        })
        ->findOrFail($id);

    return response()->json($music);
}

    // ✅ Delete music
    public function destroy($id)
    {
        $music = Music::where('id', $id)->where('user_id', auth()->id())->firstOrFail();
        Storage::disk('public')->delete($music->file_path);
        $music->delete();

        return response()->json(['message' => 'Music deleted successfully']);
    }
}