/**
 * API client for Audio Classifier backend
 */
import axios from 'axios'
import type {
  Track,
  TracksResponse,
  SearchResponse,
  SimilarTracksResponse,
  JobStatus,
  AnalyzeFolderRequest,
  WaveformData,
  Stats,
  FilterParams,
} from './types'

// Get API URL from runtime config (injected at container startup) or fallback to env var
function getApiUrl(): string {
  if (typeof window !== 'undefined' && (window as any).__RUNTIME_CONFIG__) {
    return (window as any).__RUNTIME_CONFIG__.API_URL
  }
  return process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000'
}

const API_BASE_URL = getApiUrl()

const apiClient = axios.create({
  baseURL: API_BASE_URL,
  headers: {
    'Content-Type': 'application/json',
  },
})

// Tracks
export async function getTracks(params: FilterParams & { skip?: number; limit?: number }): Promise<TracksResponse> {
  const response = await apiClient.get('/api/tracks', { params })
  return response.data
}

export async function getTrack(id: string): Promise<Track> {
  const response = await apiClient.get(`/api/tracks/${id}`)
  return response.data
}

export async function deleteTrack(id: string): Promise<void> {
  await apiClient.delete(`/api/tracks/${id}`)
}

// Search
export async function searchTracks(
  query: string,
  filters?: { genre?: string; mood?: string; limit?: number }
): Promise<SearchResponse> {
  const response = await apiClient.get('/api/search', {
    params: { q: query, ...filters },
  })
  return response.data
}

// Similar
export async function getSimilarTracks(id: string, limit: number = 10): Promise<SimilarTracksResponse> {
  const response = await apiClient.get(`/api/tracks/${id}/similar`, {
    params: { limit },
  })
  return response.data
}

// Analysis
export async function analyzeFolder(request: AnalyzeFolderRequest): Promise<{ job_id: string }> {
  const response = await apiClient.post('/api/analyze/folder', request)
  return response.data
}

export async function getAnalyzeStatus(jobId: string): Promise<JobStatus> {
  const response = await apiClient.get(`/api/analyze/status/${jobId}`)
  return response.data
}

export async function deleteJob(jobId: string): Promise<void> {
  await apiClient.delete(`/api/analyze/job/${jobId}`)
}

// Audio
export function getStreamUrl(trackId: string): string {
  return `${API_BASE_URL}/api/audio/stream/${trackId}`
}

export function getDownloadUrl(trackId: string): string {
  return `${API_BASE_URL}/api/audio/download/${trackId}`
}

export async function getWaveform(trackId: string, numPeaks: number = 800): Promise<WaveformData> {
  const response = await apiClient.get(`/api/audio/waveform/${trackId}`, {
    params: { num_peaks: numPeaks },
  })
  return response.data
}

// Stats
export async function getStats(): Promise<Stats> {
  const response = await apiClient.get('/api/stats')
  return response.data
}

// Health
export async function healthCheck(): Promise<{ status: string }> {
  const response = await apiClient.get('/health')
  return response.data
}

export default apiClient