import json
import logging
import os
import sys
import time
import subprocess
import multiprocessing
import schedule
import sqlite3
import pandas as pd
from datetime import datetime, timezone

from logging_utils import setup_logging

# --- Configuration ---
WATCHED_COINS = ["BTC", "ETH", "SOL", "BNB", "HYPE", "ASTER", "ZEC", "PUMP", "SUI"]
COIN_LISTER_SCRIPT = "list_coins.py"
MARKET_FEEDER_SCRIPT = "market.py"
DATA_FETCHER_SCRIPT = "data_fetcher.py"
RESAMPLER_SCRIPT = "resampler.py" # Restored resampler script
PRICE_DATA_FILE = os.path.join("_data", "current_prices.json")
DB_PATH = os.path.join("_data", "market_data.db")
STATUS_FILE = os.path.join("_data", "fetcher_status.json")


def run_market_feeder():
    """Target function to run the market.py script in a separate process."""
    setup_logging('off', 'MarketFeedProcess')
    logging.info("Market feeder process started.")
    try:
        # Pass the log level to the script
        subprocess.run([sys.executable, MARKET_FEEDER_SCRIPT, "--log-level", "off"], check=True)
    except subprocess.CalledProcessError as e:
        logging.error(f"Market feeder script failed with error: {e}")
    except KeyboardInterrupt:
        logging.info("Market feeder process stopping.")


def run_data_fetcher_job():
    """Defines the job to be run by the scheduler for the data fetcher."""
    logging.info(f"Scheduler starting data_fetcher.py task for {', '.join(WATCHED_COINS)}...")
    try:
        command = [sys.executable, DATA_FETCHER_SCRIPT, "--coins"] + WATCHED_COINS + ["--days", "7", "--log-level", "off"]
        subprocess.run(command, check=True)
        logging.info("data_fetcher.py task finished successfully.")
    except Exception as e:
        logging.error(f"Failed to run data_fetcher.py job: {e}")


def data_fetcher_scheduler():
    """Schedules and runs the data_fetcher.py script periodically."""
    setup_logging('off', 'DataFetcherScheduler')
    run_data_fetcher_job()
    schedule.every(1).minutes.do(run_data_fetcher_job)
    logging.info("Data fetcher scheduled to run every 1 minute.")
    while True:
        schedule.run_pending()
        time.sleep(1)

# --- Restored Resampler Functions ---
def run_resampler_job():
    """Defines the job to be run by the scheduler for the resampler."""
    logging.info(f"Scheduler starting resampler.py task for {', '.join(WATCHED_COINS)}...")
    try:
        # Uses default timeframes configured within resampler.py
        command = [sys.executable, RESAMPLER_SCRIPT, "--coins"] + WATCHED_COINS + ["--log-level", "off"]
        subprocess.run(command, check=True)
        logging.info("resampler.py task finished successfully.")
    except Exception as e:
        logging.error(f"Failed to run resampler.py job: {e}")


def resampler_scheduler():
    """Schedules and runs the resampler.py script periodically."""
    setup_logging('off', 'ResamplerScheduler')
    run_resampler_job()
    schedule.every(4).minutes.do(run_resampler_job)
    logging.info("Resampler scheduled to run every 4 minutes.")
    while True:
        schedule.run_pending()
        time.sleep(1)
# --- End of Restored Functions ---

class MainApp:
    def __init__(self, coins_to_watch: list):
        self.watched_coins = coins_to_watch
        self.prices = {}
        self.last_db_update_info = "Initializing..."
        self._lines_printed = 0 # To track how many lines we printed last time

    def read_prices(self):
        """Reads the latest prices from the JSON file."""
        if not os.path.exists(PRICE_DATA_FILE):
            return
        try:
            with open(PRICE_DATA_FILE, 'r', encoding='utf-8') as f:
                self.prices = json.load(f)
        except (json.JSONDecodeError, IOError):
            logging.debug("Could not read price file (might be locked).")

    def get_overall_db_status(self):
        """Reads the fetcher status from the status file."""
        if not os.path.exists(STATUS_FILE):
            self.last_db_update_info = "Status file not found."
            return
        try:
            with open(STATUS_FILE, 'r', encoding='utf-8') as f:
                status = json.load(f)
            coin = status.get("last_updated_coin")
            timestamp_utc_str = status.get("last_run_timestamp_utc")
            num_candles = status.get("num_updated_candles", 0)

            if timestamp_utc_str:
                dt_naive = datetime.strptime(timestamp_utc_str, '%Y-%m-%d %H:%M:%S')
                dt_utc = dt_naive.replace(tzinfo=timezone.utc)
                dt_local = dt_utc.astimezone(None)
                timestamp_display = dt_local.strftime('%Y-%m-%d %H:%M:%S %Z')
            else:
                timestamp_display = "N/A"

            self.last_db_update_info = f"{coin} at {timestamp_display} ({num_candles} candles)"
        except (IOError, json.JSONDecodeError) as e:
            self.last_db_update_info = "Error reading status file."
            logging.error(f"Could not read status file: {e}")

    def display_dashboard(self):
        """Displays a formatted table for prices and DB status without blinking."""
        # Move the cursor up to overwrite the previous output
        if self._lines_printed > 0:
            print(f"\x1b[{self._lines_printed}A", end="")

        # Build the output as a single string
        output_lines = []
        output_lines.append("--- Market Dashboard ---")
        table_width = 26
        output_lines.append("-" * table_width)
        output_lines.append(f"{'#':<2} | {'Coin':<6} | {'Live Price':>10} |")
        output_lines.append("-" * table_width)
        for i, coin in enumerate(self.watched_coins, 1):
            price = self.prices.get(coin, "Loading...")
            output_lines.append(f"{i:<2} | {coin:<6} | {price:>10} |")
        output_lines.append("-" * table_width)
        output_lines.append(f"DB Status: Last coin updated -> {self.last_db_update_info}")
        
        # Join lines and add a code to clear from cursor to end of screen
        # This prevents artifacts if the new output is shorter than the old one.
        final_output = "\n".join(output_lines) + "\n\x1b[J"
        print(final_output, end="")
        
        # Store the number of lines printed for the next iteration
        self._lines_printed = len(output_lines)
        
        sys.stdout.flush()

    def run(self):
        """Main loop to read and display data."""
        while True:
            self.read_prices()
            self.get_overall_db_status()
            self.display_dashboard()
            time.sleep(2)


if __name__ == "__main__":
    setup_logging('normal', 'MainApp')

    logging.info(f"Running coin lister: '{COIN_LISTER_SCRIPT}'...")
    try:
        subprocess.run([sys.executable, COIN_LISTER_SCRIPT], check=True, capture_output=True, text=True)
    except subprocess.CalledProcessError as e:
        logging.error(f"Failed to run '{COIN_LISTER_SCRIPT}'. Error: {e.stderr}")
        sys.exit(1)

    logging.info(f"Starting market feeder ('{MARKET_FEEDER_SCRIPT}')...")
    market_process = multiprocessing.Process(target=run_market_feeder, daemon=True)
    market_process.start()
    
    logging.info(f"Starting historical data fetcher ('{DATA_FETCHER_SCRIPT}')...")
    fetcher_process = multiprocessing.Process(target=data_fetcher_scheduler, daemon=True)
    fetcher_process.start()
    
    # --- Restored Resampler Process Start ---
    logging.info(f"Starting resampler ('{RESAMPLER_SCRIPT}')...")
    resampler_process = multiprocessing.Process(target=resampler_scheduler, daemon=True)
    resampler_process.start()
    # --- End Resampler Process Start ---
    
    time.sleep(3)

    app = MainApp(coins_to_watch=WATCHED_COINS)
    try:
        app.run()
    except KeyboardInterrupt:
        logging.info("Shutting down...")
        market_process.terminate()
        fetcher_process.terminate()
        # --- Restored Resampler Shutdown ---
        resampler_process.terminate()
        market_process.join()
        fetcher_process.join()
        resampler_process.join()
        # --- End Resampler Shutdown ---
        logging.info("Shutdown complete.")
        sys.exit(0)