import re, os, urllib.request
import tkinter as tk
from datetime import datetime
from bs4 import BeautifulSoup
from tkinter import filedialog, simpledialog, messagebox, scrolledtext
from v2cmodules.common import *

def extract_version(title):
    # Use regular expressions to extract the version number from the title
    match = re.search(r'(\d+\.\d+\.\d+)', title)
    if match:
        return match.group(1)
    return None

def fetch_ini():
    global INVALID_INI
    try:
        with open(CONFIG_FILE, 'w') as file:
                config_url = 'https://git.rolfsvaag.no/frarol96/Video2Crops/raw/branch/main/config.ini'
                with urllib.request.urlopen(config_url) as config_template:
                    config_template = config_template.read().decode("utf-8")
                    file.write(config_template)
                    tk.messagebox.showinfo("Reset config file", f"Config file has been reset")
                    debug('DEBUG', f"Config file was reset to default")
                    INVALID_INI = False
    except:
        print(f"[ERROR] Unable to fetch the missing config.ini file!\nCheck directory permissions and network connectivity!")
        exit

# Debug function
def debug(state, message):
    if DEBUG:
        allowed_states = ['LOG EVENT', 'DEBUG', 'ERROR', 'INFO']
        if state in allowed_states:
            debug_message = f"[{state}] {message}"
            print(f"{debug_message}")
            debugfile_path = os.path.join(os.getcwd(), 'debugfile.txt')
            with open(debugfile_path, 'a') as debugfile:
                log_debug_message = f"{datetime.now().strftime('%m-%d_%H:%M:%S')} | [{state}] {message}\n"
                debugfile.write(log_debug_message)
        else:
            raise ValueError(f"Invalid state '{state}'. Please choose from {', '.join(allowed_states)}.")
        
def checkinifile():
    global INVALID_INI

    # Check for the presence of sections and keys
    expected_sections = ['settings', 'debug']
    expected_settings_keys = {
        'frame_step': int,
        'contrast_threshold': float,
        'duplicate_threshold': int,
        'save_output': bool,
        'show_playback': bool,
        'roi_size': int,
        'window_size': str,
        'user_defined_output_dir': str
    }
    expected_debug_keys = {
        'debug_output': bool
    }

    CHECK_SECTIONS = True
    CHECK_KEYS = True
    CHECK_VALUES = False

    # Check for the presence of sections
    if CHECK_SECTIONS:
        for section in expected_sections:
            if section not in config.sections():
                INVALID_INI = True
                print(f"Missing section: [{section}]")

    # Check for the presence of keys and their types in the 'settings' section
    if 'settings' in config.sections():
        for key, expected_type in expected_settings_keys.items():
            if key not in config['settings']:
                if CHECK_KEYS:
                    INVALID_INI = True
                    print(f"Missing key '{key}' in [settings] section")
            else:
                value = config.get('settings', key)
                if not isinstance(value, expected_type):
                    if CHECK_VALUES:
                        INVALID_INI = True
                        print(f"Value of '{key}' in [settings] section is not of expected type {expected_type}")

    # Check for the presence of keys and their types in the 'debug' section
    if 'debug' in config.sections():
        for key, expected_type in expected_debug_keys.items():
            if key not in config['debug']:
                if CHECK_KEYS:
                    INVALID_INI = True
                    print(f"Missing key '{key}' in [debug] section")
            else:
                value = config.get('debug', key)
                if not isinstance(value, expected_type):
                    if CHECK_VALUES:
                        INVALID_INI = True
                        print(f"Value of '{key}' in [debug] section is not of expected type {expected_type}")
    if INVALID_INI:
        fetch_ini()

def write2ini(section, variable, value):
    config.set(section, str(variable), str(value))

    # Save the changes to the INI file
    with open(CONFIG_FILE, 'w') as configfile:
        config.write(configfile)

def extract_changelog(description):
    # Parse the HTML content using BeautifulSoup
    soup = BeautifulSoup(description, 'html.parser')
    
    # Find all changelog sections
    changelog_sections = soup.find_all('h3', id='user-content-changelog')
    
    changelogs = []
    
    for changelog_section in changelog_sections:
        # Extract the changelog text as plain text
        changelog_text = changelog_section.find_next('ul').get_text()
        changelogs.append(changelog_text.strip())

    # Join the changelogs into a single string
    changelog_str = '\n'.join(changelogs)

    return changelog_str if changelog_str else None

def toggle_save():
    if not processing:
        global SAVE
        SAVE = not SAVE
        write2ini('settings', 'save_output', SAVE)
        debug('DEBUG', f"Saving output: {SAVE}")
    else:
        messagebox.showinfo("Info", "Video2Crops is currently processing files!")

def toggle_show():
    if not processing:
        global SHOW
        SHOW = not SHOW
        write2ini('settings', 'show_playback', SHOW)
        debug('DEBUG', f"Displaying output: {SHOW}")
    else:
        messagebox.showinfo("Info", "Video2Crops is currently processing files!")
        
# Function to create the output directory and return its path
def create_output_directory(video_filename):
    debug('DEBUG', f"Creating output directory")
    base_directory = user_defined_output_dir
    video_filename_base, _ = os.path.splitext(os.path.basename(video_filename))
    output_folder_path = os.path.join(base_directory, video_filename_base)

    # Create the output directory if it doesn't exist
    if not os.path.exists(output_folder_path):
        os.makedirs(output_folder_path)

    debug('DEBUG', f"Processing file: {video_filename}")
    debug('DEBUG', f"Created output directory at: {output_folder_path}")
    return output_folder_path
        
def truncate_path(path, pre_max=None, post_max=None):
    # Split the path into components
    path_components = os.path.normpath(path).split(os.path.sep)

    # Ensure the first two components are displayed in full
    pre_part = os.path.sep.join(path_components[:2])

    # Ensure the last two components are displayed in full
    post_part = os.path.sep.join(path_components[-2:])

    # Truncate the pre-portion if pre_max is specified
    if pre_max is not None:
        pre_part = pre_part[:pre_max]

    # Truncate the post-portion if post_max is specified
    if post_max is not None:
        post_part = post_part[-post_max:]

    # Combine the parts with ellipsis in between
    truncated_path = f"{pre_part}...{post_part}"

    debug('DEBUG', f"Truncated the path \'{path}\' to \'{truncated_path}\'")
    return truncated_path