"""
Minecraft Update Bot - Detects new Minecraft releases and posts to Reddit
"""

import praw
import json
import time
import os
import threading
from datetime import datetime
import config
from minecraft_checker import get_latest_releases, parse_release_date
from wiki_config import WikiConfig
from update_checker import start_update_checker


# Bot version (increment when making changes)
BOT_VERSION = "1.0"

# Database file to track posted versions
DB_DIR = os.path.join(os.path.dirname(__file__), 'DB')
POSTED_VERSIONS_FILE = os.path.join(DB_DIR, 'posted_versions.json')

# Wiki configuration manager (initialized on startup)
wiki_config = WikiConfig()


def init_db():
    """Initialize the database directory and posted versions file."""
    os.makedirs(DB_DIR, exist_ok=True)
    
    if not os.path.exists(POSTED_VERSIONS_FILE):
        with open(POSTED_VERSIONS_FILE, 'w') as f:
            json.dump({"posted": []}, f, indent=2)


def load_posted_versions():
    """Load the list of already-posted version IDs."""
    try:
        with open(POSTED_VERSIONS_FILE, 'r') as f:
            data = json.load(f)
            return set(data.get("posted", []))
    except:
        return set()


def save_posted_version(version_id):
    """Save a version ID as posted."""
    try:
        with open(POSTED_VERSIONS_FILE, 'r') as f:
            data = json.load(f)
    except:
        data = {"posted": []}
    
    if version_id not in data.get("posted", []):
        data.setdefault("posted", []).append(version_id)
    
    with open(POSTED_VERSIONS_FILE, 'w') as f:
        json.dump(data, f, indent=2)


def make_reddit_connection():
    """Create a Reddit API connection using PRAW."""
    try:
        reddit = praw.Reddit(
            client_id=config.REDDIT_CLIENT_ID,
            client_secret=config.REDDIT_CLIENT_SECRET,
            user_agent=config.REDDIT_USER_AGENT,
            username=config.REDDIT_USERNAME,
            password=config.REDDIT_PASSWORD
        )
        
        # Test the connection
        reddit.user.me()
        print("[BOT] ✓ Successfully connected to Reddit")
        return reddit
    except Exception as e:
        print(f"[BOT] ✗ Failed to connect to Reddit: {e}")
        return None


def post_to_subreddit(reddit, version_info):
    """
    Post a message about a new Minecraft release to the subreddit.
    
    Args:
        reddit: PRAW Reddit instance
        version_info: Dict with keys: id, type, releaseTime
    
    Returns:
        True if successful, False otherwise
    """
    try:
        version_id = version_info["id"]
        release_type = version_info["type"]
        release_date = parse_release_date(version_info["releaseTime"])
        
        # Get title and body from wiki config
        title, body = wiki_config.format_post(release_type, version_id, release_date)
        
        subreddit = reddit.subreddit(config.SUBREDDIT)
        submission = subreddit.submit(title, selftext=body)
        
        print(f"[BOT] ✓ Posted Minecraft {version_id} ({release_type})")
        print(f"      URL: {submission.url}")
        return True
    
    except Exception as e:
        print(f"[BOT] ✗ Failed to post: {e}")
        return False


def check_for_updates(reddit):
    """
    Check for new Minecraft releases and post if any are new.
    
    Args:
        reddit: PRAW Reddit instance
    """
    try:
        posted_versions = load_posted_versions()
        latest_releases = get_latest_releases(config.RELEASE_TYPES)
        
        for version_info in latest_releases:
            version_id = version_info["id"]
            
            if version_id not in posted_versions:
                print(f"[BOT] New release found: {version_id}")
                if post_to_subreddit(reddit, version_info):
                    save_posted_version(version_id)
            else:
                print(f"[BOT] Version {version_id} already posted, skipping")
    
    except Exception as e:
        print(f"[BOT] ✗ Error checking for updates: {e}")


def bot_thread(reddit):
    """
    Background thread that periodically checks for Minecraft updates.
    
    Args:
        reddit: PRAW Reddit instance
    """
    print(f"[BOT] Started update checker (checking every {config.CHECK_INTERVAL} seconds)")
    
    while True:
        try:
            check_for_updates(reddit)
        except Exception as e:
            print(f"[BOT] ✗ Error in bot thread: {e}")
        
        time.sleep(config.CHECK_INTERVAL)


def start_bot():
    """Start the Minecraft Update Bot."""
    print("[BOT] Starting Minecraft Update Bot...")
    
    # Initialize database
    init_db()
    
    # Connect to Reddit
    reddit = make_reddit_connection()
    if not reddit:
        print("[BOT] ✗ Cannot start bot without Reddit connection")
        return
    
    # Initialize wiki configuration
    wiki_config.init(reddit, config.SUBREDDIT)
    wiki_config.fetch_from_wiki()
    
    # Start update checker
    start_update_checker(reddit, config.SUBREDDIT, "MinecraftUpdateBot", BOT_VERSION)
    
    # Do an initial check
    check_for_updates(reddit)
    
    # Start background thread
    thread = threading.Thread(target=bot_thread, args=(reddit,), daemon=True)
    thread.start()
    
    print("[BOT] ✓ Bot is running")
    
    # Keep main thread alive
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        print("\n[BOT] Shutting down...")


if __name__ == "__main__":
    start_bot()