main

media-worker/Services/SunoMusicService.cs

@@ -0,0 +1,137 @@
+using System.Text;
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using SaasMediaWorker.Configuration;
+using SaasMediaWorker.Models;
+
+namespace SaasMediaWorker.Services;
+
+/// <summary>
+/// Suno AI API Client — Background müzik üretimi.
+/// Projenin musicPrompt'unu kullanarak AI müzik üretir.
+/// </summary>
+public class SunoMusicService
+{
+    private readonly HttpClient _httpClient;
+    private readonly ILogger<SunoMusicService> _logger;
+    private readonly ApiSettings _settings;
+
+    public SunoMusicService(
+        HttpClient httpClient,
+        ILogger<SunoMusicService> logger,
+        IOptions<ApiSettings> settings)
+    {
+        _httpClient = httpClient;
+        _logger = logger;
+        _settings = settings.Value;
+
+        _httpClient.BaseAddress = new Uri(_settings.SunoBaseUrl);
+        _httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {_settings.SunoApiKey}");
+        _httpClient.Timeout = TimeSpan.FromMinutes(5);
+    }
+
+    /// <summary>
+    /// Proje için background müzik üretir ve dosyaya kaydeder.
+    /// </summary>
+    public async Task<GeneratedMediaFile> GenerateMusicAsync(
+        string musicPrompt,
+        int targetDurationSeconds,
+        string outputDirectory,
+        CancellationToken ct)
+    {
+        _logger.LogInformation(
+            "🎵 Müzik üretimi — Prompt: \"{Prompt}\", Süre: {Duration}s",
+            musicPrompt[..Math.Min(80, musicPrompt.Length)],
+            targetDurationSeconds);
+
+        var requestBody = new
+        {
+            prompt = musicPrompt,
+            duration = Math.Min(120, targetDurationSeconds + 5), // Biraz fazla üret (fade-out için)
+            make_instrumental = true, // Vokal olmadan
+            model = "chirp-v3"
+        };
+
+        var content = new StringContent(
+            JsonSerializer.Serialize(requestBody),
+            Encoding.UTF8,
+            "application/json");
+
+        var response = await _httpClient.PostAsync("/generations", content, ct);
+        response.EnsureSuccessStatusCode();
+
+        var responseJson = await response.Content.ReadAsStringAsync(ct);
+        var result = JsonSerializer.Deserialize<JsonElement>(responseJson);
+
+        // Generation ID al
+        var generationId = result.GetProperty("id").GetString()
+            ?? throw new InvalidOperationException("Suno generation ID alınamadı");
+
+        _logger.LogInformation("Suno generation başlatıldı: {Id}", generationId);
+
+        // Polling — müzik hazır olana kadar bekle
+        var musicUrl = await PollForCompletionAsync(generationId, ct);
+
+        // Müzik dosyasını indir
+        var outputPath = Path.Combine(outputDirectory, "background_music.mp3");
+        await DownloadFileAsync(musicUrl, outputPath, ct);
+
+        var fileInfo = new FileInfo(outputPath);
+
+        _logger.LogInformation("Müzik indirildi: {Path} ({Size} bytes)", outputPath, fileInfo.Length);
+
+        return new GeneratedMediaFile
+        {
+            SceneId = string.Empty, // Proje seviyesi — sahneye bağlı değil
+            SceneOrder = 0,
+            Type = MediaFileType.AudioMusic,
+            LocalPath = outputPath,
+            FileSizeBytes = fileInfo.Length,
+            DurationSeconds = targetDurationSeconds,
+            MimeType = "audio/mpeg",
+            AiProvider = "suno"
+        };
+    }
+
+    private async Task<string> PollForCompletionAsync(string generationId, CancellationToken ct)
+    {
+        var maxAttempts = 60; // 5 dakika (5s × 60)
+        for (var i = 0; i < maxAttempts; i++)
+        {
+            ct.ThrowIfCancellationRequested();
+            await Task.Delay(5000, ct);
+
+            var response = await _httpClient.GetAsync($"/generations/{generationId}", ct);
+            response.EnsureSuccessStatusCode();
+
+            var json = await response.Content.ReadAsStringAsync(ct);
+            var result = JsonSerializer.Deserialize<JsonElement>(json);
+            var status = result.GetProperty("status").GetString();
+
+            if (status == "completed" || status == "complete")
+            {
+                return result.GetProperty("audio_url").GetString()
+                    ?? throw new InvalidOperationException("Müzik URL bulunamadı");
+            }
+
+            if (status == "failed" || status == "error")
+            {
+                var errorMsg = result.TryGetProperty("error", out var err)
+                    ? err.GetString() : "Bilinmeyen hata";
+                throw new InvalidOperationException($"Suno müzik üretimi başarısız: {errorMsg}");
+            }
+        }
+
+        throw new TimeoutException($"Suno müzik üretimi zaman aşımına uğradı: {generationId}");
+    }
+
+    private async Task DownloadFileAsync(string url, string outputPath, CancellationToken ct)
+    {
+        using var response = await _httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead, ct);
+        response.EnsureSuccessStatusCode();
+
+        await using var fileStream = File.Create(outputPath);
+        await response.Content.CopyToAsync(fileStream, ct);
+    }
+}