import { useServerStore } from '@/stores/serverStore';
import type {
  VoiceProfileCreate,
  VoiceProfileResponse,
  ProfileSampleResponse,
  GenerationRequest,
  GenerationResponse,
  HistoryQuery,
  HistoryListResponse,
  HistoryResponse,
  TranscriptionResponse,
  HealthResponse,
  ModelStatusListResponse,
  ModelDownloadRequest,
  ActiveTasksResponse,
} from './types';

class ApiClient {
  private getBaseUrl(): string {
    const serverUrl = useServerStore.getState().serverUrl;
    return serverUrl;
  }

  private async request<T>(endpoint: string, options?: RequestInit): Promise<T> {
    const url = `${this.getBaseUrl()}${endpoint}`;
    const response = await fetch(url, {
      ...options,
      headers: {
        'Content-Type': 'application/json',
        ...options?.headers,
      },
    });

    if (!response.ok) {
      const error = await response.json().catch(() => ({
        detail: response.statusText,
      }));
      throw new Error(error.detail || `HTTP error! status: ${response.status}`);
    }

    return response.json();
  }

  // Health
  async getHealth(): Promise<HealthResponse> {
    return this.request<HealthResponse>('/health');
  }

  // Profiles
  async createProfile(data: VoiceProfileCreate): Promise<VoiceProfileResponse> {
    return this.request<VoiceProfileResponse>('/profiles', {
      method: 'POST',
      body: JSON.stringify(data),
    });
  }

  async listProfiles(): Promise<VoiceProfileResponse[]> {
    return this.request<VoiceProfileResponse[]>('/profiles');
  }

  async getProfile(profileId: string): Promise<VoiceProfileResponse> {
    return this.request<VoiceProfileResponse>(`/profiles/${profileId}`);
  }

  async updateProfile(profileId: string, data: VoiceProfileCreate): Promise<VoiceProfileResponse> {
    return this.request<VoiceProfileResponse>(`/profiles/${profileId}`, {
      method: 'PUT',
      body: JSON.stringify(data),
    });
  }

  async deleteProfile(profileId: string): Promise<void> {
    await this.request<void>(`/profiles/${profileId}`, {
      method: 'DELETE',
    });
  }

  async addProfileSample(
    profileId: string,
    file: File,
    referenceText: string,
  ): Promise<ProfileSampleResponse> {
    const url = `${this.getBaseUrl()}/profiles/${profileId}/samples`;
    const formData = new FormData();
    formData.append('file', file);
    formData.append('reference_text', referenceText);

    const response = await fetch(url, {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      const error = await response.json().catch(() => ({
        detail: response.statusText,
      }));
      throw new Error(error.detail || `HTTP error! status: ${response.status}`);
    }

    return response.json();
  }

  async listProfileSamples(profileId: string): Promise<ProfileSampleResponse[]> {
    return this.request<ProfileSampleResponse[]>(`/profiles/${profileId}/samples`);
  }

  async deleteProfileSample(sampleId: string): Promise<void> {
    await this.request<void>(`/profiles/samples/${sampleId}`, {
      method: 'DELETE',
    });
  }

  async exportProfile(profileId: string): Promise<Blob> {
    const url = `${this.getBaseUrl()}/profiles/${profileId}/export`;
    const response = await fetch(url);

    if (!response.ok) {
      const error = await response.json().catch(() => ({
        detail: response.statusText,
      }));
      throw new Error(error.detail || `HTTP error! status: ${response.status}`);
    }

    return response.blob();
  }

  async importProfile(file: File): Promise<VoiceProfileResponse> {
    const url = `${this.getBaseUrl()}/profiles/import`;
    const formData = new FormData();
    formData.append('file', file);

    const response = await fetch(url, {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      const error = await response.json().catch(() => ({
        detail: response.statusText,
      }));
      throw new Error(error.detail || `HTTP error! status: ${response.status}`);
    }

    return response.json();
  }

  // Generation
  async generateSpeech(data: GenerationRequest): Promise<GenerationResponse> {
    return this.request<GenerationResponse>('/generate', {
      method: 'POST',
      body: JSON.stringify(data),
    });
  }

  // History
  async listHistory(query?: HistoryQuery): Promise<HistoryListResponse> {
    const params = new URLSearchParams();
    if (query?.profile_id) params.append('profile_id', query.profile_id);
    if (query?.search) params.append('search', query.search);
    if (query?.limit) params.append('limit', query.limit.toString());
    if (query?.offset) params.append('offset', query.offset.toString());

    const queryString = params.toString();
    const endpoint = queryString ? `/history?${queryString}` : '/history';

    return this.request<HistoryListResponse>(endpoint);
  }

  async getGeneration(generationId: string): Promise<HistoryResponse> {
    return this.request<HistoryResponse>(`/history/${generationId}`);
  }

  async deleteGeneration(generationId: string): Promise<void> {
    await this.request<void>(`/history/${generationId}`, {
      method: 'DELETE',
    });
  }

  // Audio
  getAudioUrl(audioId: string): string {
    return `${this.getBaseUrl()}/audio/${audioId}`;
  }

  getSampleUrl(sampleId: string): string {
    return `${this.getBaseUrl()}/samples/${sampleId}`;
  }

  // Transcription
  async transcribeAudio(file: File, language?: 'en' | 'zh'): Promise<TranscriptionResponse> {
    const formData = new FormData();
    formData.append('file', file);
    if (language) {
      formData.append('language', language);
    }

    const url = `${this.getBaseUrl()}/transcribe`;
    const response = await fetch(url, {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      const error = await response.json().catch(() => ({
        detail: response.statusText,
      }));
      throw new Error(error.detail || `HTTP error! status: ${response.status}`);
    }

    return response.json();
  }

  // Model Management
  async getModelStatus(): Promise<ModelStatusListResponse> {
    return this.request<ModelStatusListResponse>('/models/status');
  }

  async triggerModelDownload(modelName: string): Promise<{ message: string }> {
    return this.request<{ message: string }>('/models/download', {
      method: 'POST',
      body: JSON.stringify({ model_name: modelName } as ModelDownloadRequest),
    });
  }

  async deleteModel(modelName: string): Promise<{ message: string }> {
    return this.request<{ message: string }>(`/models/${modelName}`, {
      method: 'DELETE',
    });
  }

  // Task Management
  async getActiveTasks(): Promise<ActiveTasksResponse> {
    return this.request<ActiveTasksResponse>('/tasks/active');
  }
}

export const apiClient = new ApiClient();