import { useState, useEffect } from 'react'
import Generator from './components/Generator'
import Gallery from './components/Gallery'
import Player from './components/Player'
import DetailPanel from './components/DetailPanel'
import SettingsModal from './components/SettingsModal'
import ArtworkGenerationModal from './components/ArtworkGenerationModal'

interface Clip {
  id: string
  title?: string
  prompt: string
  model: string
  duration_seconds: number
  status: string
  error_message?: string
  file_size_bytes?: number
  artwork_filename?: string | null
  bpm?: number | null
  key?: string | null
  created_at: string
}

function App() {
  const [clips, setClips] = useState<Clip[]>([])
  const [currentClip, setCurrentClip] = useState<Clip | null>(null)
  const [isPlaying, setIsPlaying] = useState(false)
  const [selectedClip, setSelectedClip] = useState<Clip | null>(null)
  const [settingsOpen, setSettingsOpen] = useState(false)
  const [artworkGenOpen, setArtworkGenOpen] = useState(false)
  const [artworkGenClip, setArtworkGenClip] = useState<Clip | null>(null)

  const fetchClips = async () => {
    try {
      const res = await fetch('/api/clips')
      const data = await res.json()
      setClips(data.clips)
      // Fetch analysis for clips that don't have it
      const missing = data.clips.filter((c: Clip) => c.status === 'ready' && (!c.bpm || !c.key))
      missing.forEach(async (clip: Clip) => {
        try {
          const res = await fetch(`/api/clips/${clip.id}/analysis`)
          if (res.ok) {
            const analysis = await res.json()
            setClips(prev => prev.map(c => c.id === clip.id ? { ...c, bpm: analysis.bpm, key: analysis.key } : c))
          }
        } catch (err) {
          // Silently fail — analysis is optional
        }
      })
    } catch (err) {
      console.error('Failed to fetch clips:', err)
    }
  }

  useEffect(() => {
    fetchClips()
    const interval = setInterval(fetchClips, 5000)
    return () => clearInterval(interval)
  }, [])

  const handlePlay = (clip: Clip) => {
    setCurrentClip(clip)
    setIsPlaying(true)
  }

  const handleDelete = async (id: string) => {
    try {
      await fetch(`/api/clips/${id}`, { method: 'DELETE' })
      if (currentClip?.id === id) {
        setCurrentClip(null)
        setIsPlaying(false)
      }
      fetchClips()
    } catch (err) {
      console.error('Failed to delete clip:', err)
    }
  }

  const handleRename = async (id: string, title: string) => {
    try {
      await fetch(`/api/clips/${id}`, {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ title }),
      })
      setClips(prev => prev.map(c => c.id === id ? { ...c, title } : c))
      if (currentClip?.id === id) {
        setCurrentClip({ ...currentClip, title })
      }
      if (selectedClip?.id === id) {
        setSelectedClip({ ...selectedClip, title })
      }
    } catch (err) {
      console.error('Failed to rename clip:', err)
    }
  }

  const handleUploadArtwork = async (id: string, file: File) => {
    try {
      const formData = new FormData()
      formData.append('file', file)
      const res = await fetch(`/api/clips/${id}/artwork`, {
        method: 'PATCH',
        body: formData,
      })
      if (!res.ok) {
        const err = await res.json()
        console.error('Artwork upload failed:', err.detail)
        return
      }
      const updated = await res.json()
      setClips(prev => prev.map(c => c.id === id ? { ...c, artwork_filename: updated.artwork_filename } : c))
      if (currentClip?.id === id) {
        setCurrentClip({ ...currentClip, artwork_filename: updated.artwork_filename })
      }
      if (selectedClip?.id === id) {
        setSelectedClip({ ...selectedClip, artwork_filename: updated.artwork_filename })
      }
    } catch (err) {
      console.error('Failed to upload artwork:', err)
    }
  }

  const handleRemoveArtwork = async (id: string) => {
    try {
      await fetch(`/api/clips/${id}/artwork`, { method: 'DELETE' })
      setClips(prev => prev.map(c => c.id === id ? { ...c, artwork_filename: null } : c))
      if (currentClip?.id === id) {
        setCurrentClip({ ...currentClip, artwork_filename: null })
      }
      if (selectedClip?.id === id) {
        setSelectedClip({ ...selectedClip, artwork_filename: null })
      }
    } catch (err) {
      console.error('Failed to remove artwork:', err)
    }
  }

  const handleGenerateArtwork = async (clip: Clip) => {
    setArtworkGenClip(clip)
    setArtworkGenOpen(true)
  }

  const handleArtworkGenSubmit = async (prompt: string) => {
    if (!artworkGenClip) return
    try {
      const res = await fetch(`/api/clips/${artworkGenClip.id}/generate-artwork`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ prompt }),
      })
      if (res.ok) {
        const updated = await res.json()
        setClips(prev => prev.map(c => c.id === updated.id ? updated : c))
        if (currentClip?.id === updated.id) {
          setCurrentClip(updated)
        }
        if (selectedClip?.id === updated.id) {
          setSelectedClip(updated)
        }
      } else {
        const err = await res.json()
        alert(err.detail || 'Failed to generate artwork')
      }
    } catch (err) {
      console.error('Failed to generate artwork:', err)
      alert('Failed to generate artwork')
    }
  }

  const handleSelectClip = async (clip: Clip) => {
    setSelectedClip(clip)
    // Fetch analysis if not already cached
    if (!clip.bpm || !clip.key) {
      try {
        const res = await fetch(`/api/clips/${clip.id}/analysis`)
        if (res.ok) {
          const analysis = await res.json()
          setClips(prev => prev.map(c => c.id === clip.id ? { ...c, bpm: analysis.bpm, key: analysis.key } : c))
          setSelectedClip({ ...clip, bpm: analysis.bpm, key: analysis.key })
        }
      } catch (err) {
        console.error('Failed to fetch analysis:', err)
      }
    }
  }

  const handleClearWaveforms = async () => {
    try {
      await fetch('/api/admin/clear-waveforms', { method: 'POST' })
    } catch (err) {
      console.error('Failed to clear waveforms:', err)
    }
  }

  const handleDeleteAll = async () => {
    try {
      await fetch('/api/admin/delete-all-clips', { method: 'POST' })
      setClips([])
      setCurrentClip(null)
      setIsPlaying(false)
      setSelectedClip(null)
    } catch (err) {
      console.error('Failed to delete all clips:', err)
    }
  }

  return (
    <div className="min-h-screen bg-lyria-dark">
      <header className="border-b border-white/10 px-6 py-4">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="w-8 h-8 rounded bg-lyria-accent flex items-center justify-center text-white font-bold text-sm">
              L
            </div>
            <h1 className="text-xl font-bold text-white">Lyria Studio</h1>
            <span className="text-xs text-lyria-muted bg-white/5 px-2 py-0.5 rounded">v0.1</span>
          </div>
          <button
            onClick={() => setSettingsOpen(true)}
            className="text-lyria-muted hover:text-white transition-colors p-1 rounded hover:bg-white/5"
            title="Settings"
            aria-label="Open settings"
          >
            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
            </svg>
          </button>
        </div>
      </header>

      <main className="max-w-6xl mx-auto p-6 pb-24 grid grid-cols-1 lg:grid-cols-3 gap-6">
        <div className="lg:col-span-1">
          <Generator onGenerate={fetchClips} />
        </div>
        <div className="lg:col-span-2 space-y-4">
          <Gallery
            clips={clips}
            onPlay={handlePlay}
            onDelete={handleDelete}
            onRename={handleRename}
            onSelect={handleSelectClip}
            onUploadArtwork={handleUploadArtwork}
            currentClipId={currentClip?.id}
          />
        </div>
      </main>

      {currentClip && (
        <Player
          clip={currentClip}
          isPlaying={isPlaying}
          onTogglePlay={() => setIsPlaying(!isPlaying)}
          onStop={() => setIsPlaying(false)}
          onClose={() => {
            setCurrentClip(null)
            setIsPlaying(false)
          }}
        />
      )}

      {selectedClip && (
        <DetailPanel
          clip={selectedClip}
          isPlaying={isPlaying}
          currentClipId={currentClip?.id}
          onClose={() => setSelectedClip(null)}
          onRename={handleRename}
          onDelete={handleDelete}
          onUploadArtwork={handleUploadArtwork}
          onRemoveArtwork={handleRemoveArtwork}
          onPlay={handlePlay}
          onTogglePlay={() => setIsPlaying(!isPlaying)}
          onGenerateArtwork={handleGenerateArtwork}
        />
      )}

      {artworkGenOpen && artworkGenClip && (
        <ArtworkGenerationModal
          isOpen={artworkGenOpen}
          onClose={() => {
            setArtworkGenOpen(false)
            setArtworkGenClip(null)
          }}
          onGenerate={handleArtworkGenSubmit}
          trackName={artworkGenClip.title || artworkGenClip.prompt}
        />
      )}

      <SettingsModal
        isOpen={settingsOpen}
        onClose={() => setSettingsOpen(false)}
        onClearWaveforms={handleClearWaveforms}
        onDeleteAll={handleDeleteAll}
        clipCount={clips.length}
      />
    </div>
  )
}

export default App