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import streamlit as st
import datetime
import os

# Initialize session state variables
if 'transcript_history' not in st.session_state:
    st.session_state.transcript_history = []

# Create containers at the top level
st.title("Speech Recognition with Transcript History")

# Create the main layout
col1, col2 = st.columns([2, 1])

with col1:
    # Speech recognition component
    html = """
    <!DOCTYPE html>
    <html>
    <head>
        <title>Continuous Speech Demo</title>
        <style>
            body { 
                font-family: sans-serif; 
                padding: 20px; 
                max-width: 800px;
                margin: 0 auto;
            }
            button { 
                padding: 10px 20px; 
                margin: 10px 5px;
                font-size: 16px;
            }
            #status { 
                margin: 10px 0;
                padding: 10px;
                background: #e8f5e9;
                border-radius: 4px;
            }
            #output {
                white-space: pre-wrap;
                padding: 15px;
                background: #f5f5f5;
                border-radius: 4px;
                margin: 10px 0;
                min-height: 100px;
                max-height: 400px;
                overflow-y: auto;
            }
            .controls {
                margin: 10px 0;
            }
        </style>
    </head>
    <body>
        <div class="controls">
            <button id="start">Start Listening</button>
            <button id="stop" disabled>Stop Listening</button>
            <button id="clear">Clear Text</button>
        </div>
        <div id="status">Ready</div>
        <div id="output"></div>

        <script>
            if (!('webkitSpeechRecognition' in window)) {
                alert('Speech recognition not supported');
            } else {
                const recognition = new webkitSpeechRecognition();
                const startButton = document.getElementById('start');
                const stopButton = document.getElementById('stop');
                const clearButton = document.getElementById('clear');
                const status = document.getElementById('status');
                const output = document.getElementById('output');
                let fullTranscript = '';
                let lastUpdateTime = Date.now();

                // Configure recognition
                recognition.continuous = true;
                recognition.interimResults = true;

                startButton.onclick = () => {
                    try {
                        recognition.start();
                        status.textContent = 'Listening...';
                        startButton.disabled = true;
                        stopButton.disabled = false;
                    } catch (e) {
                        console.error(e);
                        status.textContent = 'Error: ' + e.message;
                    }
                };

                stopButton.onclick = () => {
                    recognition.stop();
                    status.textContent = 'Stopped';
                    startButton.disabled = false;
                    stopButton.disabled = true;
                };

                clearButton.onclick = () => {
                    fullTranscript = '';
                    output.textContent = '';
                };

                recognition.onresult = (event) => {
                    let interimTranscript = '';
                    let finalTranscript = '';

                    for (let i = event.resultIndex; i < event.results.length; i++) {
                        const transcript = event.results[i][0].transcript;
                        if (event.results[i].isFinal) {
                            finalTranscript += transcript + '\\n';
                        } else {
                            interimTranscript += transcript;
                        }
                    }

                    if (finalTranscript || (Date.now() - lastUpdateTime > 5000)) {
                        if (finalTranscript) {
                            fullTranscript += finalTranscript;
                            // Try to communicate with Streamlit
                            try {
                                parent.postMessage({
                                    type: 'transcriptUpdate',
                                    text: finalTranscript
                                }, '*');
                            } catch (e) {
                                console.error('Failed to send transcript:', e);
                            }
                        }
                        lastUpdateTime = Date.now();
                    }

                    output.textContent = fullTranscript + (interimTranscript ? '... ' + interimTranscript : '');
                    output.scrollTop = output.scrollHeight;
                };

                recognition.onend = () => {
                    if (!stopButton.disabled) {
                        try {
                            recognition.start();
                            console.log('Restarted recognition');
                        } catch (e) {
                            console.error('Failed to restart recognition:', e);
                            status.textContent = 'Error restarting: ' + e.message;
                            startButton.disabled = false;
                            stopButton.disabled = true;
                        }
                    }
                };

                recognition.onerror = (event) => {
                    console.error('Recognition error:', event.error);
                    status.textContent = 'Error: ' + event.error;
                    
                    if (event.error === 'not-allowed' || event.error === 'service-not-allowed') {
                        startButton.disabled = false;
                        stopButton.disabled = true;
                    }
                };
            }
        </script>
    </body>
    </html>
    """
    st.components.v1.html(html, height=400)

with col2:
    # Display transcript history
    st.subheader("Transcript History")
    transcript_text = st.empty()
    
    # Save transcript function
    def save_transcript(text):
        if not os.path.exists('transcripts'):
            os.makedirs('transcripts')
        
        timestamp = datetime.datetime.now().strftime('%Y%m%d_%H%M%S')
        filename = f"transcripts/transcript_{timestamp}.md"
        
        with open(filename, 'w', encoding='utf-8') as f:
            f.write(text)

    # Display full transcript
    if st.session_state.transcript_history:
        full_transcript = "\n".join(st.session_state.transcript_history)
        transcript_text.text_area("Full Transcript", value=full_transcript, height=300)
        
        # Save and download buttons
        col1, col2 = st.columns(2)
        with col1:
            if st.button("Save Transcript"):
                save_transcript(full_transcript)
                st.success("Transcript saved!")
        
        with col2:
            st.download_button(
                label="Download Transcript",
                data=full_transcript,
                file_name=f"transcript_{datetime.datetime.now().strftime('%Y%m%d_%H%M%S')}.md",
                mime="text/markdown"
            )

# Listen for transcript updates
if st.session_state.get('transcriptUpdate'):
    new_text = st.session_state.transcriptUpdate
    st.session_state.transcript_history.append(new_text)
    st.session_state.transcriptUpdate = None  # Clear the update
    st.rerun()