import os
import time
import shutil
from datetime import datetime, date
import hashlib
import subprocess

# File paths
SOURCE_FILE = "/home/pi/Conjurer/script.params"
BACKUP_DIR = "/home/pi/Conjurer"
GIT_REPO_DIR = "/home/pi/conjurer/conjurer_musician"
LAST_HASH_FILE = "/home/pi/Conjurer/.last_hash"
LAST_GIT_COMMIT_FILE = "/home/pi/Conjurer/.last_git_commit"

def compute_file_hash(filepath):
    with open(filepath, 'rb') as f:
        return hashlib.sha256(f.read()).hexdigest()

def backup_file():
    timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
    backup_path = os.path.join(BACKUP_DIR, f"{timestamp}_script.params")
    shutil.copy2(SOURCE_FILE, backup_path)

def commit_to_git():
    try:
        subprocess.run(["cp", SOURCE_FILE, os.path.join(GIT_REPO_DIR, "script.params")], check=True)
        subprocess.run(["git", "-C", GIT_REPO_DIR, "add", "script.params"], check=True)
        subprocess.run(["git", "-C", GIT_REPO_DIR, "commit", "-m", f"Daily update: {datetime.now()}"], check=True)
        subprocess.run(["git", "-C", GIT_REPO_DIR, "push"], check=True)
    except subprocess.CalledProcessError as e:
        print(f"Git operation failed: {e}")

def main():
    if not os.path.exists(SOURCE_FILE):
        return

    current_hash = compute_file_hash(SOURCE_FILE)

    # Detect change
    last_hash = None
    if os.path.exists(LAST_HASH_FILE):
        with open(LAST_HASH_FILE, 'r') as f:
            last_hash = f.read().strip()

    if current_hash != last_hash:
        backup_file()
        with open(LAST_HASH_FILE, 'w') as f:
            f.write(current_hash)

    # Daily git commit
    today = str(date.today())
    last_commit_date = ""
    if os.path.exists(LAST_GIT_COMMIT_FILE):
        with open(LAST_GIT_COMMIT_FILE, 'r') as f:
            last_commit_date = f.read().strip()

    if today != last_commit_date:
        commit_to_git()
        with open(LAST_GIT_COMMIT_FILE, 'w') as f:
            f.write(today)

if __name__ == "__main__":
    main()