"""
FastAPI server for Bitcoin mining dashboard
"""
from fastapi import FastAPI, HTTPException
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
import uvicorn
from parallel_miner_v3 import ParallelMiner
import threading
from typing import Dict, Optional
import logging

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s'
)

app = FastAPI(title="Bitcoin Mining Dashboard")

# Mount static files
app.mount("/static", StaticFiles(directory="static"), name="static")
app.mount("/css", StaticFiles(directory="static/css"), name="css")
app.mount("/js", StaticFiles(directory="static/js"), name="js")

# Global state
miner_instance: Optional[ParallelMiner] = None
mining_thread: Optional[threading.Thread] = None
is_mining: bool = False

@app.get("/")
async def get_index():
    """Serve the dashboard HTML"""
    return FileResponse("static/index.html")

@app.post("/start_mining")
async def start_mining():
    """Start the mining process"""
    global miner_instance, mining_thread, is_mining
    
    if is_mining:
        raise HTTPException(status_code=400, detail="Mining is already running")
    
    try:
        miner_instance = ParallelMiner(num_cores=5)
        miner_instance.mining = True
        is_mining = True
        
        # Start mining in background thread
        mining_thread = threading.Thread(
            target=miner_instance.start_mining,
            kwargs={"duration": None}
        )
        mining_thread.daemon = True
        mining_thread.start()
        
        return {"message": "Mining started successfully"}
    except Exception as e:
        logging.error(f"Error starting mining: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@app.post("/stop_mining")
async def stop_mining():
    """Stop the mining process"""
    global miner_instance, is_mining
    
    if not is_mining:
        raise HTTPException(status_code=400, detail="Mining is not running")
    
    try:
        if miner_instance:
            # Log final stats
            logging.info("\n=== Final Mining Statistics ===")
            grand_total = 0
            for core_idx, core in enumerate(miner_instance.cores):
                core_total = core.total_hashes
                grand_total += core_total
                logging.info(f"Core {core_idx}: {core_total:,} hashes")
            logging.info(f"Grand Total: {grand_total:,} hashes")
            logging.info(f"Overall Hashrate: {miner_instance.current_hashrate/1000:.2f} KH/s")
            logging.info(f"Blocks Found: {miner_instance.blocks_found}")
            logging.info("============================\n")
            
            miner_instance.mining = False
            is_mining = False
            return {"message": "Mining stopped successfully"}
            
        raise HTTPException(status_code=400, detail="No active mining instance")
    except Exception as e:
        logging.error(f"Error stopping mining: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@app.get("/get_stats")
async def get_mining_stats():
    """Get current mining statistics"""
    global miner_instance, is_mining
    
    if not miner_instance or not is_mining:
        return {
            "status": "Stopped",
            "hashrate": "0 H/s",
            "total_hashes": "0",
            "blocks_found": "0",
            "best_hash": "None",
            "difficulty": "0",
            "block_alert": "Mining stopped"
        }
    
    # Create block alert message
    if miner_instance.blocks_found > 0:
        block_alert = f"🎉 FOUND {miner_instance.blocks_found} BLOCK(S)! Last block hash: {miner_instance.best_hash.hex() if miner_instance.best_hash else 'None'}"
    else:
        progress = miner_instance.best_hash_difficulty * 100 if miner_instance.best_hash_difficulty else 0
        block_alert = f"Mining in progress... Best hash difficulty: {progress:.8f}%"
    
    return {
        "status": "Running" if is_mining else "Stopped",
        "hashrate": f"{miner_instance.current_hashrate/1000:.2f} KH/s",
        "total_hashes": f"{miner_instance.total_hashes:,}",
        "blocks_found": str(miner_instance.blocks_found),
        "best_hash": miner_instance.best_hash.hex() if miner_instance.best_hash else "None",
        "difficulty": f"{miner_instance.best_hash_difficulty:,}",
        "block_alert": block_alert
    }

processing_thread = None

@app.on_event("startup")
async def startup_event():
    global processing_thread
    if not (processing_thread and processing_thread.is_alive()): 
        processing_thread = threading.Thread(target=get_index())
        processing_thread.daemon = True
        processing_thread.start()

if __name__ == "__main__":
    uvicorn.run("app", host="0.0.0.0", port=7868, reload=False)