"""
Theta Audio Editor - Audio file player and basic editing
"""

import streamlit as st
import streamlit.components.v1 as components
import base64
from typing import Optional, Dict, Any

def theta_audio_editor(
    audio_file: Optional[str] = None,
    width: int = 800,
    height: int = 400,
    key: Optional[str] = None
) -> None:
    """
    Create an audio editor with playback and basic editing features.
    
    Parameters:
    -----------
    audio_file : str or None
        Path to audio file or base64 encoded audio
    width : int
        Width of the editor in pixels
    height : int  
        Height of the editor in pixels
        
    Returns:
    --------
    Dict with audio data and edits or None
    """
    
    component_html = f"""
    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <title>Theta Audio Editor</title>
        <style>
            body {{
                margin: 0;
                padding: 10px;
                font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
                background: #f5f5f5;
            }}
            
            .editor-container {{
                width: {width}px;
                height: {height}px;
                background: white;
                border-radius: 8px;
                box-shadow: 0 2px 10px rgba(0,0,0,0.1);
                display: flex;
                flex-direction: column;
            }}
            
            .header {{
                height: 60px;
                background: #2c3e50;
                color: white;
                border-radius: 8px 8px 0 0;
                display: flex;
                align-items: center;
                padding: 0 20px;
                font-size: 18px;
                font-weight: 600;
            }}
            
            .controls {{
                height: 80px;
                background: #34495e;
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 15px;
                padding: 0 20px;
            }}
            
            .control-btn {{
                background: #3498db;
                border: none;
                color: white;
                padding: 12px 20px;
                border-radius: 25px;
                cursor: pointer;
                font-size: 14px;
                font-weight: 600;
                transition: all 0.3s;
                min-width: 80px;
            }}
            
            .control-btn:hover {{
                background: #2980b9;
                transform: translateY(-2px);
            }}
            
            .control-btn:disabled {{
                background: #7f8c8d;
                cursor: not-allowed;
                transform: none;
            }}
            
            .waveform-container {{
                flex: 1;
                background: #ecf0f1;
                padding: 20px;
                display: flex;
                flex-direction: column;
                gap: 15px;
            }}
            
            .waveform {{
                height: 100px;
                background: #fff;
                border-radius: 8px;
                border: 2px solid #bdc3c7;
                position: relative;
                overflow: hidden;
            }}
            
            .waveform canvas {{
                width: 100%;
                height: 100%;
                display: block;
            }}
            
            .progress-bar {{
                height: 6px;
                background: #ecf0f1;
                border-radius: 3px;
                overflow: hidden;
                cursor: pointer;
            }}
            
            .progress {{
                height: 100%;
                background: #3498db;
                width: 0%;
                transition: width 0.1s;
            }}
            
            .time-info {{
                display: flex;
                justify-content: space-between;
                color: #7f8c8d;
                font-size: 12px;
                font-family: monospace;
            }}
            
            .file-upload {{
                display: flex;
                align-items: center;
                gap: 10px;
                margin-bottom: 10px;
            }}
            
            .file-input {{
                display: none;
            }}
            
            .file-label {{
                background: #27ae60;
                color: white;
                padding: 8px 16px;
                border-radius: 6px;
                cursor: pointer;
                font-size: 12px;
                transition: background 0.3s;
            }}
            
            .file-label:hover {{
                background: #229954;
            }}
            
            .effects-panel {{
                background: #fff;
                border-radius: 8px;
                padding: 15px;
                border: 1px solid #bdc3c7;
            }}
            
            .effects-title {{
                font-weight: 600;
                margin-bottom: 10px;
                color: #2c3e50;
            }}
            
            .effect-control {{
                display: flex;
                align-items: center;
                gap: 10px;
                margin-bottom: 8px;
            }}
            
            .effect-control label {{
                min-width: 60px;
                font-size: 12px;
                color: #7f8c8d;
            }}
            
            .effect-control input[type="range"] {{
                flex: 1;
            }}
            
            .effect-control span {{
                min-width: 30px;
                font-size: 12px;
                color: #7f8c8d;
                text-align: right;
            }}
        </style>
    </head>
    <body>
        <div class="editor-container">
            <!-- Header -->
            <div class="header">
                🎵 Theta Audio Editor
            </div>
            
            <!-- Controls -->
            <div class="controls">
                <button class="control-btn" id="play-btn" onclick="togglePlay()">▶ Play</button>
                <button class="control-btn" onclick="stopAudio()">⏹ Stop</button>
                <button class="control-btn" onclick="rewind()">⏪ Rewind</button>
                <button class="control-btn" onclick="fastForward()">⏩ Forward</button>
                <button class="control-btn" onclick="saveChanges()">💾 Save</button>
            </div>
            
            <!-- Waveform and Controls -->
            <div class="waveform-container">
                <!-- File Upload -->
                <div class="file-upload">
                    <label for="audio-file" class="file-label">📁 Load Audio File</label>
                    <input type="file" id="audio-file" class="file-input" accept="audio/*" onchange="loadAudioFile(event)">
                    <span id="file-name">No file selected</span>
                </div>
                
                <!-- Waveform -->
                <div class="waveform">
                    <canvas id="waveform-canvas"></canvas>
                </div>
                
                <!-- Progress Bar -->
                <div class="progress-bar" onclick="seekTo(event)">
                    <div class="progress" id="progress"></div>
                </div>
                
                <!-- Time Info -->
                <div class="time-info">
                    <span id="current-time">0:00</span>
                    <span id="total-time">0:00</span>
                </div>
                
                <!-- Effects Panel -->
                <div class="effects-panel">
                    <div class="effects-title">Audio Effects</div>
                    
                    <div class="effect-control">
                        <label>Volume:</label>
                        <input type="range" id="volume" min="0" max="100" value="50" onchange="adjustVolume(this.value)">
                        <span id="volume-val">50%</span>
                    </div>
                    
                    <div class="effect-control">
                        <label>Speed:</label>
                        <input type="range" id="speed" min="25" max="200" value="100" onchange="adjustSpeed(this.value)">
                        <span id="speed-val">1.0x</span>
                    </div>
                    
                    <div class="effect-control">
                        <label>Pitch:</label>
                        <input type="range" id="pitch" min="-12" max="12" value="0" onchange="adjustPitch(this.value)">
                        <span id="pitch-val">0</span>
                    </div>
                </div>
            </div>
        </div>
        
        <audio id="audio-player" preload="auto"></audio>
        
        <script>
            let audioPlayer = document.getElementById('audio-player');
            let isPlaying = false;
            let audioFile = null;
            let audioContext = null;
            let sourceNode = null;
            
            // Initialize audio context
            function initAudioContext() {{
                if (!audioContext) {{
                    audioContext = new (window.AudioContext || window.webkitAudioContext)();
                }}
            }}
            
            function loadAudioFile(event) {{
                const file = event.target.files[0];
                if (!file) return;
                
                // Update file info
                audioFile = file;
                document.getElementById('file-name').textContent = file.name;
                
                const url = URL.createObjectURL(file);
                audioPlayer.src = url;
                
                // Draw waveform when loaded
                audioPlayer.addEventListener('loadeddata', () => {{
                    drawWaveform();
                    updateTimeDisplay();
                }});
                
                initAudioContext();
            }}
            
            function togglePlay() {{
                const playBtn = document.getElementById('play-btn');
                
                if (isPlaying) {{
                    audioPlayer.pause();
                    playBtn.textContent = '▶ Play';
                    isPlaying = false;
                }} else {{
                    if (audioPlayer.src) {{
                        audioPlayer.play();
                        playBtn.textContent = '⏸ Pause';
                        isPlaying = true;
                    }}
                }}
            }}
            
            function stopAudio() {{
                audioPlayer.pause();
                audioPlayer.currentTime = 0;
                document.getElementById('play-btn').textContent = '▶ Play';
                isPlaying = false;
                updateProgress();
            }}
            
            function rewind() {{
                audioPlayer.currentTime = Math.max(0, audioPlayer.currentTime - 10);
            }}
            
            function fastForward() {{
                audioPlayer.currentTime = Math.min(audioPlayer.duration, audioPlayer.currentTime + 10);
            }}
            
            function seekTo(event) {{
                if (audioPlayer.duration) {{
                    const rect = event.target.getBoundingClientRect();
                    const percent = (event.clientX - rect.left) / rect.width;
                    audioPlayer.currentTime = percent * audioPlayer.duration;
                }}
            }}
            
            function adjustVolume(value) {{
                audioPlayer.volume = value / 100;
                document.getElementById('volume-val').textContent = value + '%';
            }}
            
            function adjustSpeed(value) {{
                audioPlayer.playbackRate = value / 100;
                document.getElementById('speed-val').textContent = (value / 100).toFixed(1) + 'x';
            }}
            
            function adjustPitch(value) {{
                // Note: Pitch shifting requires Web Audio API implementation
                document.getElementById('pitch-val').textContent = value;
            }}
            
            function updateProgress() {{
                if (audioPlayer.duration) {{
                    const percent = (audioPlayer.currentTime / audioPlayer.duration) * 100;
                    document.getElementById('progress').style.width = percent + '%';
                    
                    // Update time display
                    document.getElementById('current-time').textContent = formatTime(audioPlayer.currentTime);
                    document.getElementById('total-time').textContent = formatTime(audioPlayer.duration);
                }}
            }}
            
            function formatTime(seconds) {{
                const mins = Math.floor(seconds / 60);
                const secs = Math.floor(seconds % 60);
                return mins + ':' + (secs < 10 ? '0' : '') + secs;
            }}
            
            function updateTimeDisplay() {{
                if (audioPlayer.duration) {{
                    document.getElementById('total-time').textContent = formatTime(audioPlayer.duration);
                }}
            }}
            
            function drawWaveform() {{
                const canvas = document.getElementById('waveform-canvas');
                const ctx = canvas.getContext('2d');
                
                // Set canvas size
                canvas.width = canvas.offsetWidth;
                canvas.height = canvas.offsetHeight;
                
                // Draw placeholder waveform
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                ctx.fillStyle = '#3498db';
                
                for (let i = 0; i < canvas.width; i += 3) {{
                    const height = Math.random() * canvas.height * 0.8;
                    ctx.fillRect(i, (canvas.height - height) / 2, 2, height);
                }}
            }}
            
            function saveChanges() {{
                const settings = {{
                    title: "Theta Audio Settings",
                    audio: {{
                        filename: audioFile ? audioFile.name : "No file loaded",
                        volume: document.getElementById('volume').value,
                        speed: document.getElementById('speed').value,
                        pitch: document.getElementById('pitch').value
                    }},
                    saved: new Date().toISOString(),
                    version: "1.0.0"
                }};
                
                const jsonContent = JSON.stringify(settings, null, 2);
                const blob = new Blob([jsonContent], {{ type: 'application/json' }});
                
                // Create download link
                const url = URL.createObjectURL(blob);
                const a = document.createElement('a');
                a.href = url;
                a.download = `audio-settings_${{new Date().toISOString().slice(0,19).replace(/:/g,'-')}}.json`;
                document.body.appendChild(a);
                a.click();
                document.body.removeChild(a);
                URL.revokeObjectURL(url);
                
                alert('Audio settings downloaded successfully!');
            }}
            
            // Event listeners
            audioPlayer.addEventListener('timeupdate', updateProgress);
            audioPlayer.addEventListener('ended', () => {{
                document.getElementById('play-btn').textContent = '▶ Play';
                isPlaying = false;
            }});
            
            // Initialize
            window.addEventListener('resize', drawWaveform);
        </script>
    </body>
    </html>
    """
    
    component_value = components.html(
        component_html,
        width=width + 50,
        height=height + 50
    )
    
    # Component doesn't return data due to Streamlit version compatibility
    return None