import streamlit as st
import json
import os
from datetime import datetime
from calendar_rag import (
    create_default_config,
    AcademicCalendarRAG,
    PipelineConfig
)

# Custom CSS for enhanced styling
def load_custom_css():
    st.markdown("""
            <style>
            /* General body styling */
            body {
                font-family: "Arial", sans-serif !important; /* Clean and readable font */
                color: #000000 !important; /* Black text */
                background-color: white !important;
                line-height: 1.7 !important; /* Increase line spacing */
            }
            
            /* Main container styling */
            .main {
                padding: 2rem;
                color: #000000; /* Ensure all text is black */
                background-color: white;
            }
            
            /* Headers styling */
            h1 {
                color: #000000; /* Black headers */
                font-size: 2.8rem !important; /* Larger font for headers */
                font-weight: 700 !important;
                margin-bottom: 1.5rem !important;
                text-align: center;
                padding: 1rem 0;
                border-bottom: 3px solid #1E3A8A; /* Keep a blue line for a clean design */
            }
            
            h3, h4 {
                color: #000000; /* Black sub-headers */
                font-weight: 600 !important;
                font-size: 1.6rem !important; /* Increase font size for sub-headers */
                margin-top: 1.5rem !important;
            }
            
            /* Paragraphs and text */
            p, span, li {
                font-size: 1.2rem !important; /* Larger font size for regular text */
                color: #000000 !important; /* Black text */
            }
            
            /* Chat message styling */
            .chat-message {
                padding: 1.5rem;
                border-radius: 10px;
                margin: 1rem 0;
                box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
                font-size: 1.1rem !important;
                line-height: 1.6 !important; /* Better readability */
                font-family: "Arial", sans-serif !important;
                color: #000000 !important; /* Black text in chat */
            }
            
            .user-message {
                background-color: #F3F4F6 !important;
            }
            
            .assistant-message {
                background-color: #EFF6FF !important;
            }
            
            /* Input field styling */
            .stTextInput input {
                border-radius: 8px;
                border: 2px solid #E5E7EB;
                padding: 0.75rem;
                font-size: 1.1rem;
                font-family: "Arial", sans-serif !important;
                color: #000000; /* Black input text */
            }
            
            .stTextInput input:focus {
                border-color: #1E3A8A;
                box-shadow: 0 0 0 2px rgba(30, 58, 138, 0.1);
            }
            
            /* Button styling */
            .stButton button {
                border-radius: 8px;
                font-weight: 600;
                font-size: 1.2rem !important; /* Bigger buttons for better interaction */
                color: #000000; /* Black text on buttons */
                transition: all 0.2s ease;
            }
            
            .stButton button:hover {
                transform: translateY(-1px);
                box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            }
            
            /* List styling */
            ul {
                font-size: 1.2rem !important;
                margin-left: 1rem;
                color: #000000; /* Black text in lists */
                list-style-type: disc;
            }
            
            /* Status indicator styling */
            .status-indicator {
                padding: 0.5rem 1rem;
                border-radius: 6px;
                font-weight: 500;
                font-size: 1.2rem; /* Larger for better clarity */
                color: #000000; /* Black text for status */
            }
            
            .status-online {
                background-color: #DEF7EC;
                color: #03543F;
            }
            
            .status-offline {
                background-color: #FDE8E8;
                color: #9B1C1C;
            }
            </style>
    """, unsafe_allow_html=True)

# Page config
st.set_page_config(
    page_title="Academic Calendar Assistant",
    page_icon="📅",
    layout="wide",
    initial_sidebar_state="collapsed"
)

# Load custom CSS
load_custom_css()

# Initialize session state
if 'pipeline' not in st.session_state:
    st.session_state.pipeline = None
    
if 'chat_history' not in st.session_state:
    st.session_state.chat_history = []
    
if 'feedback_data' not in st.session_state:
    st.session_state.feedback_data = []

def initialize_pipeline():
    """Initialize RAG pipeline with configurations"""
    try:
        openai_api_key = os.getenv('OPENAI_API_KEY') or st.secrets['OPENAI_API_KEY']
        config = create_default_config(openai_api_key)
        config.localization.enable_thai_normalization = True
        config.retriever.top_k = 5
        config.model.temperature = 0.3
        pipeline = AcademicCalendarRAG(config)
        
        with open("calendar.json", "r", encoding="utf-8") as f:
            calendar_data = json.load(f)
        pipeline.load_data(calendar_data)
        
        return pipeline
        
    except Exception as e:
        st.error(f"Error initializing pipeline: {str(e)}")
        return None

def save_feedback_to_json():
    """Save feedback data to a JSON file"""
    try:
        # Get current directory
        current_dir = os.path.dirname(os.path.abspath(__file__))
        file_path = os.path.join(current_dir, 'feedback_data.json')
        
        # Log the attempt
        st.write(f"Attempting to save feedback to: {file_path}")
        
        # Create directory if it doesn't exist
        os.makedirs(current_dir, exist_ok=True)
        
        # Save the file
        with open(file_path, "w", encoding="utf-8") as f:
            json.dump(
                st.session_state.feedback_data,
                f,
                ensure_ascii=False,
                indent=2
            )
            
        # Verify file was created
        if os.path.exists(file_path):
            st.write(f"✅ Feedback saved successfully to {file_path}")
            st.write(f"Current feedback data: {st.session_state.feedback_data}")
            return True
        else:
            st.error("File was not created despite no errors")
            return False
            
    except Exception as e:
        st.error(f"Error saving feedback: {str(e)}")
        st.write(f"Current directory: {current_dir}")
        st.write(f"Current feedback data: {st.session_state.feedback_data}")
        return False

def add_feedback(query: str, answer: str, is_correct: bool):
    """Add feedback entry to session state and save to JSON"""
    feedback_entry = {
        "timestamp": datetime.now().isoformat(),
        "query": query,
        "answer": answer,
        "is_correct": is_correct
    }
    st.session_state.feedback_data.append(feedback_entry)
    save_feedback_to_json()

def evaluate_answer(query: str, answer: str):
    """Display evaluation buttons for the answer"""
    col1, col2, col3 = st.columns([1, 1, 4])
    
    with col1:
        if st.button("✅ ถูกต้อง", type="primary", key=f"correct_{len(st.session_state.chat_history)}"):
            add_feedback(query, answer, True)
            st.success("บันทึกผลการประเมินแล้ว")
            return True
            
    with col2:
        if st.button("❌ ไม่ถูกต้อง", type="secondary", key=f"incorrect_{len(st.session_state.chat_history)}"):
            add_feedback(query, answer, False)
            st.error("บันทึกผลการประเมินแล้ว")
            return True
            
    return False

def display_chat_history():
    """Display chat history with enhanced styling"""
    for i, (role, message) in enumerate(st.session_state.chat_history):
        if role == "user":
            st.markdown(f"""
                <div class="chat-message user-message">
                    <strong>🧑 คำถาม:</strong><br>
                    {message}
                </div>
            """, unsafe_allow_html=True)
        else:
            st.markdown(f"""
                <div class="chat-message assistant-message">
                    <strong>🤖 คำตอบ:</strong><br>
                    {message}
                </div>
            """, unsafe_allow_html=True)
            
            # Add evaluation buttons after each assistant response
            if i == len(st.session_state.chat_history) - 1:  # Only for the latest answer
                user_query = st.session_state.chat_history[i-1][1]  # Get the corresponding user query
                evaluate_answer(user_query, message)

def add_to_history(role: str, message: str):
    """Add message to chat history"""
    st.session_state.chat_history.append((role, message))

def main():
    # Header with animation
    st.markdown("""
        <div style="text-align: center; padding: 2rem 0;">
            <h1>🎓 ระบบค้นหาข้อมูลปฏิทินการศึกษา</h1>
        </div>
    """, unsafe_allow_html=True)

    # Initialize pipeline if needed
    if st.session_state.pipeline is None:
        with st.spinner("กำลังเริ่มต้นระบบ..."):
            st.session_state.pipeline = initialize_pipeline()
    
    # Create two columns with better proportions
    chat_col, info_col = st.columns([7, 3])
    
    with chat_col:
        # Add a subtle container for the chat interface
        with st.container():
            # Display chat history
            display_chat_history()
            
            # Main query interface with enhanced styling
            st.markdown("<br>", unsafe_allow_html=True)
            query = st.text_input(
                "โปรดระบุคำถามเกี่ยวกับปฏิทินการศึกษา:",
                placeholder="เช่น: วันสุดท้ายของการสอบปากเปล่าในภาคเรียนที่ 1/2567 คือวันที่เท่าไร?",
                key="query_input"
            )

            # Button layout with enhanced styling
            col1, col2, col3 = st.columns([1, 1, 4])
            with col1:
                send_query = st.button("📤 ส่งคำถาม", type="primary", use_container_width=True)
            with col2:
                if st.button("🗑️ ล้างประวัติ", type="secondary", use_container_width=True):
                    st.session_state.chat_history = []
                    st.rerun()

            # Process query
            if send_query and query:
                if st.session_state.pipeline is None:
                    st.error("❌ ไม่สามารถเชื่อมต่อกับระบบได้ กรุณาลองใหม่อีกครั้ง")
                    return
                    
                add_to_history("user", query)
                    
                try:
                    with st.spinner("🔍 กำลังค้นหาคำตอบ..."):
                        result = st.session_state.pipeline.process_query(query)
                        add_to_history("assistant", result["answer"])
                        
                        # Enhanced expandable sections
                        with st.expander("📚 แสดงข้อมูลอ้างอิง", expanded=False):
                            for i, doc in enumerate(result["documents"], 1):
                                st.markdown(f"""
                                    <div style="padding: 1rem; background-color: #F9FAFB; border-radius: 8px; margin: 0.5rem 0;">
                                        <strong>เอกสารที่ {i}:</strong><br>
                                        {doc.content}
                                    </div>
                                """, unsafe_allow_html=True)
                        
                        with st.expander("🔍 รายละเอียดการวิเคราะห์คำถาม", expanded=False):
                            st.json(result["query_info"])
                        
                        st.rerun()
                        
                except Exception as e:
                    st.error(f"❌ เกิดข้อผิดพลาด: {str(e)}")
            
            elif send_query and not query:
                st.warning("⚠️ กรุณาระบุคำถาม")
    
    with info_col:
        # Enhanced system information section
        st.markdown("""
            <div style="background-color: #F9FAFB; padding: 1.5rem; border-radius: 12px; margin-bottom: 2rem;">
                <h3>ℹ️ เกี่ยวกับระบบ</h3>
                <p style="color: #4B5563;">
                    ระบบนี้ใช้เทคโนโลยี <strong>RAG (Retrieval-Augmented Generation)</strong> 
                    ในการค้นหาและตอบคำถามเกี่ยวกับปฏิทินการศึกษา
                </p>
                <h4 style="color: #1E3A8A; margin-top: 1rem;">สามารถสอบถามข้อมูลเกี่ยวกับ:</h4>
                <ul style="list-style-type: none; padding-left: 0;">
                    <li>📅 กำหนดการต่างๆ ในปฏิทินการศึกษา</li>
                    <li>🎯 วันสำคัญและกิจกรรม</li>
                    <li>📝 การลงทะเบียนเรียน</li>
                    <li>📚 กำหนดการสอบ</li>
                    <li>🏖️ วันหยุดการศึกษา</li>
                </ul>
            </div>
        """, unsafe_allow_html=True)
        
        # Enhanced system status section
        st.markdown("""
            <div style="background-color: #F9FAFB; padding: 1.5rem; border-radius: 12px;">
                <h3>🔄 สถานะระบบ</h3>
                <div style="margin-top: 1rem;">
                    <p><strong>⏰ เวลาปัจจุบัน:</strong><br>
                    {}</p>
                    <p><strong>📡 สถานะระบบ:</strong><br>
                    <span class="status-indicator {}">
                        {} {}
                    </span></p>
                </div>
            </div>
        """.format(
            datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
            "status-online" if st.session_state.pipeline else "status-offline",
            "🟢" if st.session_state.pipeline else "🔴",
            "พร้อมใช้งาน" if st.session_state.pipeline else "ไม่พร้อมใช้งาน"
        ), unsafe_allow_html=True)

if __name__ == "__main__":
    main()