"""
Main application for Dynamic Highscores system.

This file integrates all components into a unified application.
"""

import os
import gradio as gr
import threading
import time
from database_schema import DynamicHighscoresDB
from auth import HuggingFaceAuth
from benchmark_selection import BenchmarkSelector, create_benchmark_selection_ui
from evaluation_queue import EvaluationQueue, create_model_submission_ui
from leaderboard import Leaderboard, create_leaderboard_ui
from model_config import ModelConfigManager, create_community_framework_ui
from sample_benchmarks import add_sample_benchmarks

# Initialize components in main thread
db = DynamicHighscoresDB()
auth_manager = HuggingFaceAuth(db)
benchmark_selector = BenchmarkSelector(db, auth_manager)
evaluation_queue = EvaluationQueue(db, auth_manager, ModelConfigManager(db))
leaderboard = Leaderboard(db)
model_config_manager = ModelConfigManager(db)

# Initialize sample benchmarks if none exist
print("Checking for existing benchmarks...")
benchmarks = db.get_benchmarks()
if not benchmarks or len(benchmarks) == 0:
    print("No benchmarks found. Adding sample benchmarks...")
    try:
        # Make sure the database path is clear
        print(f"Database path: {db.db_path}")
        
        # Import and call the function directly 
        num_added = add_sample_benchmarks()
        print(f"Added {num_added} sample benchmarks.")
    except Exception as e:
        print(f"Error adding sample benchmarks: {str(e)}")
        # Try direct DB insertion as fallback
        try:
            print("Attempting direct benchmark insertion...")
            db.add_benchmark(
                name="MMLU (Massive Multitask Language Understanding)",
                dataset_id="cais/mmlu",
                description="Tests knowledge across 57 subjects"
            )
            print("Added fallback benchmark.")
        except Exception as inner_e:
            print(f"Fallback insertion failed: {str(inner_e)}")
else:
    print(f"Found {len(benchmarks)} existing benchmarks.")

# Custom CSS with theme awareness
css = """
/* Theme-adaptive colored info box */
.info-text {
    background-color: rgba(53, 130, 220, 0.1);
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    margin: 12px 0;
}

/* High-contrast text for elements - works in light and dark themes */
.info-text, .header, .footer, .tab-content, 
button, input, textarea, select, option, 
.gradio-container *, .markdown-text {
    color: var(--text-color, inherit) !important;
}

/* Container styling */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header styling */
.header {
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
    font-size: 24px;
}

/* Footer styling */
.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    border-top: 1px solid var(--border-color-primary, #eee);
}

/* Login section styling */
.login-section {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 8px;
    background-color: rgba(250, 250, 250, 0.1);
    text-align: center;
}

/* Login button styling */
.login-button {
    background-color: #4CAF50 !important;
    color: white !important;
    font-weight: bold;
}

/* Force high contrast on specific input areas */
input[type="text"], input[type="password"], textarea {
    background-color: var(--background-fill-primary) !important;
    color: var(--body-text-color) !important;
}

/* Force text visibility in multiple contexts */
.gradio-markdown p, .gradio-markdown h1, .gradio-markdown h2, 
.gradio-markdown h3, .gradio-markdown h4, .gradio-markdown li {
    color: var(--body-text-color) !important;
}

/* Fix dark mode text visibility */
@media (prefers-color-scheme: dark) {
    input, textarea, select {
        color: #ffffff !important;
    }
    
    ::placeholder {
        color: rgba(255, 255, 255, 0.5) !important;
    }
}
"""

# JavaScript login implementation
def js_login_script():
    space_host = os.environ.get("SPACE_HOST", "localhost:7860")
    redirect_uri = f"https://{space_host}"
    client_id = os.environ.get("OAUTH_CLIENT_ID", "")
    
    return f"""
    <script src="https://unpkg.com/@huggingface/hub@0.13.0/dist/index.umd.min.js"></script>
    <script>
    (async function() {{
        const HfHub = window.HfHub;
        try {{
            // Check if we're returning from OAuth redirect
            const oauthResult = await HfHub.oauthHandleRedirectIfPresent();
            
            if (oauthResult) {{
                console.log("User logged in:", oauthResult);
                
                // Store the user info in localStorage
                localStorage.setItem("hf_user", JSON.stringify(oauthResult.userInfo));
                localStorage.setItem("hf_token", oauthResult.accessToken);
                
                // Update the UI to show logged in state
                document.getElementById("login-status").textContent = "Logged in as: " + oauthResult.userInfo.name;
                document.getElementById("login-button").style.display = "none";
                
                // Add token to headers for future requests
                const originalFetch = window.fetch;
                window.fetch = function(url, options = {{}}) {{
                    if (!options.headers) {{
                        options.headers = {{}};
                    }}
                    
                    // Add the token to the headers
                    options.headers["HF-Token"] = oauthResult.accessToken;
                    
                    return originalFetch(url, options);
                }};
                
                // Refresh the page to update server-side state
                setTimeout(() => window.location.reload(), 1000);
            }}
        }} catch (error) {{
            console.error("OAuth error:", error);
        }}
        
        // Check if user is already logged in from localStorage
        const storedUser = localStorage.getItem("hf_user");
        const storedToken = localStorage.getItem("hf_token");
        
        if (storedUser && storedToken) {{
            try {{
                const userInfo = JSON.parse(storedUser);
                document.getElementById("login-status").textContent = "Logged in as: " + userInfo.name;
                document.getElementById("login-button").style.display = "none";
                
                // Add token to headers for future requests
                const originalFetch = window.fetch;
                window.fetch = function(url, options = {{}}) {{
                    if (!options.headers) {{
                        options.headers = {{}};
                    }}
                    
                    // Add the token to the headers
                    options.headers["HF-Token"] = storedToken;
                    
                    return originalFetch(url, options);
                }};
            }} catch (e) {{
                console.error("Error parsing stored user:", e);
            }}
        }}
        
        // Setup login button
        const loginButton = document.getElementById("login-button");
        if (loginButton) {{
            loginButton.addEventListener("click", async function() {{
                try {{
                    const clientId = "{client_id}";
                    if (clientId) {{
                        // Use HuggingFace OAuth
                        const loginUrl = await HfHub.oauthLoginUrl({{
                            clientId: clientId,
                            redirectUrl: "{redirect_uri}",
                            scopes: ["openid", "profile"]
                        }});
                        console.log("Redirecting to:", loginUrl);
                        window.location.href = loginUrl;
                    }} else {{
                        // Fallback to token-based login
                        const token = prompt("Enter your HuggingFace token:");
                        if (token) {{
                            // Set the token as a cookie
                            document.cookie = "hf_token=" + token + "; path=/; SameSite=Strict";
                            // Reload the page to apply the token
                            window.location.reload();
                        }}
                    }}
                }} catch (error) {{
                    console.error("Error starting login process:", error);
                    alert("Error starting login process. Please try again.");
                }}
            }});
        }}
    }})();
    </script>
    """

# Simple manual authentication check
def check_user(request: gr.Request):
    if request:
        # Check for HF-User header from Space OAuth
        username = request.headers.get("HF-User")
        if username:
            # User is logged in via HF Spaces
            print(f"User logged in via HF-User header: {username}")
            user = db.get_user_by_username(username)
            if not user:
                # Create user if they don't exist
                print(f"Creating new user: {username}")
                is_admin = (username == "Quazim0t0")
                db.add_user(username, username, is_admin)
                user = db.get_user_by_username(username)
            return username
        
        # Check for token in headers (from our custom JS)
        token = request.headers.get("HF-Token")
        if token:
            try:
                # Validate token with HuggingFace
                user_info = auth_manager.hf_api.whoami(token=token)
                if user_info:
                    username = user_info.get("name", "")
                    print(f"User logged in via token: {username}")
                    return username
            except Exception as e:
                print(f"Token validation error: {e}")
    
    return None

# Start evaluation queue worker
def start_queue_worker():
    # Wait a moment to ensure app is initialized
    time.sleep(2)
    try:
        print("Starting evaluation queue worker...")
        evaluation_queue.start_worker()
    except Exception as e:
        print(f"Error starting queue worker: {e}")

# Create Gradio app
with gr.Blocks(css=css, title="Dynamic Highscores") as app:
    # State to track user
    user_state = gr.State(None)
    
    # Login section
    with gr.Row(elem_classes=["login-section"]):
        with gr.Column():
            gr.HTML("""
            <div style="display: flex; justify-content: space-between; align-items: center;">
                <div id="login-status">Not logged in</div>
                <button id="login-button" style="padding: 8px 16px; background-color: #4CAF50; color: white; border: none; border-radius: 4px; cursor: pointer;">Login with HuggingFace</button>
            </div>
            """)
    
    # Add the JS login script
    gr.HTML(js_login_script())
    
    gr.Markdown("# 🏆 Dynamic Highscores", elem_classes=["header"])
    gr.Markdown("""
    Welcome to Dynamic Highscores - a community benchmark platform for evaluating and comparing language models.
    
    - **Add your own benchmarks** from HuggingFace datasets
    - **Submit your models** for CPU-only evaluation
    - **Compare performance** across different models and benchmarks
    - **Filter results** by model type (Merge, Agent, Reasoning, Coding, etc.)
    """, elem_classes=["info-text"])
    
    # Main tabs
    with gr.Tabs() as tabs:
        with gr.TabItem("📊 Leaderboard", id=0):
            leaderboard_ui = create_leaderboard_ui(leaderboard, db)
        
        with gr.TabItem("🚀 Submit Model", id=1):
            submission_ui = create_model_submission_ui(evaluation_queue, auth_manager, db)
        
        with gr.TabItem("🔍 Benchmarks", id=2):
            benchmark_ui = create_benchmark_selection_ui(benchmark_selector, auth_manager)
        
        with gr.TabItem("🌐 Community Framework", id=3):
            community_ui = create_community_framework_ui(model_config_manager)
    
    gr.Markdown("""
    ### About Dynamic Highscores
    
    This platform allows users to select benchmarks from HuggingFace datasets and evaluate models against them.
    Each user can submit one benchmark per day (admin users are exempt from this limit).
    All evaluations run on CPU only to ensure fair comparisons.
    
    Created by Quazim0t0
    """, elem_classes=["footer"])
    
    # Check login on page load
    app.load(
        fn=check_user,
        inputs=[],
        outputs=[user_state]
    )

# Launch the app
if __name__ == "__main__":
    # Start queue worker in a separate thread
    queue_thread = threading.Thread(target=start_queue_worker)
    queue_thread.daemon = True
    queue_thread.start()
    
    # Launch the app
    app.launch()