# discord_tools/scripts/user_history_scraper.py
import os
import sys
import asyncio
import json
from datetime import datetime

# Add the parent directory to the Python path
script_dir = os.path.dirname(os.path.abspath(__file__))
project_root = os.path.dirname(os.path.dirname(script_dir))
sys.path.insert(0, project_root)

from discord_tools.config.settings import DATA_DIR
from discord_tools.utils.api_utils import make_discord_request

def get_mutual_guilds():
    # Get all servers you're in
    response = make_discord_request('GET', '/users/@me/guilds')
    if not response:
        print("Failed to fetch guilds")
        return []
    return response.json()

def get_guild_channels(guild_id):
    # Get channels in a server
    response = make_discord_request('GET', f'/guilds/{guild_id}/channels')
    if not response:
        return []
    return response.json()

def search_user_messages_in_guild(guild_id, user_id):
    # Use Discord's search API to find messages from a specific user
    # Way faster than manually paginating through every channel
    all_messages = []
    offset = 0
    
    while True:
        endpoint = f'/guilds/{guild_id}/messages/search?author_id={user_id}&offset={offset}'
        response = make_discord_request('GET', endpoint)
        
        if not response:
            break
        
        data = response.json()
        messages = data.get('messages', [])
        
        if not messages:
            break
        
        # Discord returns messages in a weird nested format
        # Each item is a list containing related messages
        for message_group in messages:
            if isinstance(message_group, list):
                for msg in message_group:
                    if msg['author']['id'] == user_id:
                        all_messages.append(msg)
            else:
                if message_group['author']['id'] == user_id:
                    all_messages.append(message_group)
        
        # Pagination
        offset += 25
        total_results = data.get('total_results', 0)
        
        print(f"    Found {len(all_messages)} messages so far...")
        
        # If we've gotten all results, stop
        if offset >= total_results:
            break
    
    return all_messages

def get_user_info_from_guild(guild_id, user_id):
    # Try to get user info from guild member endpoint
    endpoint = f'/guilds/{guild_id}/members/{user_id}'
    response = make_discord_request('GET', endpoint)
    
    if response:
        member_data = response.json()
        return member_data.get('user')
    
    return None

def format_message_for_export(msg):
    # Convert message to a readable format
    timestamp = datetime.fromisoformat(msg['timestamp'].replace('Z', '+00:00'))
    
    formatted = {
        'id': msg['id'],
        'timestamp': timestamp.strftime('%Y-%m-%d %H:%M:%S'),
        'content': msg['content'],
        'attachments': [att['url'] for att in msg.get('attachments', [])],
        'embeds': len(msg.get('embeds', [])),
        'mentions': [f"{u['username']}#{u['discriminator']}" for u in msg.get('mentions', [])],
        'edited': msg.get('edited_timestamp') is not None
    }
    
    return formatted

def main():
    print("User History Scraper")
    print("=" * 50)
    
    user_id = input("Enter the user ID to scrape: ").strip()
    
    if not user_id.isdigit():
        print("Invalid user ID")
        return
    
    print(f"\nScraping messages from user ID: {user_id}")
    print("=" * 50)
    
    # Get all mutual guilds
    guilds = get_mutual_guilds()
    print(f"Found {len(guilds)} servers")
    
    all_scraped_messages = {}
    total_messages = 0
    username = "Unknown"
    
    for guild in guilds:
        guild_id = guild['id']
        guild_name = guild['name']
        
        print(f"\nSearching {guild_name}...")
        
        # Try to get user info from this guild
        if username == "Unknown":
            user_info = get_user_info_from_guild(guild_id, user_id)
            if user_info:
                username = f"{user_info['username']}#{user_info.get('discriminator', '0')}"
                print(f"  Found user: {username}")
        
        # Use search API to find all messages from this user in this guild
        messages = search_user_messages_in_guild(guild_id, user_id)
        
        if messages:
            # Organize by channel
            channels_dict = {}
            for msg in messages:
                channel_id = msg['channel_id']
                if channel_id not in channels_dict:
                    channels_dict[channel_id] = []
                channels_dict[channel_id].append(msg)
            
            all_scraped_messages[guild_name] = channels_dict
            total_messages += len(messages)
            print(f"  Total in {guild_name}: {len(messages)} messages across {len(channels_dict)} channels")
    
    print("\n" + "=" * 50)
    print(f"Scraping complete. Total messages found: {total_messages}")
    
    if total_messages == 0:
        print("No messages found for this user.")
        return
    
    # If we still don't have username, try to get it from first message
    if username == "Unknown":
        for guild_messages in all_scraped_messages.values():
            for messages in guild_messages.values():
                if messages:
                    first_msg = messages[0]
                    author = first_msg['author']
                    username = f"{author['username']}#{author.get('discriminator', '0')}"
                    break
            if username != "Unknown":
                break
    
    print(f"User identified as: {username}")
    
    # Save to file
    output_folder = os.path.join(DATA_DIR, f"user_history_{user_id}")
    os.makedirs(output_folder, exist_ok=True)
    
    # Save raw JSON
    raw_file = os.path.join(output_folder, "raw_messages.json")
    with open(raw_file, 'w', encoding='utf-8') as f:
        json.dump(all_scraped_messages, f, indent=2, ensure_ascii=False)
    
    # Save formatted text file
    formatted_file = os.path.join(output_folder, "formatted_messages.txt")
    with open(formatted_file, 'w', encoding='utf-8') as f:
        f.write(f"Message History for {username}\n")
        f.write(f"Scraped on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}\n")
        f.write(f"Total Messages: {total_messages}\n")
        f.write("=" * 80 + "\n\n")
        
        for guild_name, channels in all_scraped_messages.items():
            f.write(f"\n{'=' * 80}\n")
            f.write(f"SERVER: {guild_name}\n")
            f.write(f"{'=' * 80}\n\n")
            
            for channel_id, messages in channels.items():
                # Try to get channel name from first message
                channel_name = f"channel-{channel_id}"
                if messages:
                    # Channel info might be in message metadata
                    channel_name = messages[0].get('channel_id', channel_id)
                
                f.write(f"\n--- Channel {channel_name} ({len(messages)} messages) ---\n\n")
                
                # Sort messages by timestamp
                sorted_messages = sorted(messages, key=lambda x: x['timestamp'])
                
                for msg in sorted_messages:
                    formatted = format_message_for_export(msg)
                    f.write(f"[{formatted['timestamp']}]\n")
                    f.write(f"{formatted['content']}\n")
                    
                    if formatted['attachments']:
                        f.write(f"Attachments: {', '.join(formatted['attachments'])}\n")
                    
                    if formatted['edited']:
                        f.write("(edited)\n")
                    
                    f.write("\n")
    
    # Generate summary stats
    stats_file = os.path.join(output_folder, "stats.txt")
    with open(stats_file, 'w', encoding='utf-8') as f:
        f.write(f"Message Statistics for {username}\n")
        f.write("=" * 50 + "\n\n")
        f.write(f"Total Messages: {total_messages}\n")
        f.write(f"Servers: {len(all_scraped_messages)}\n\n")
        
        f.write("Messages per server:\n")
        for guild_name, channels in all_scraped_messages.items():
            guild_total = sum(len(msgs) for msgs in channels.values())
            f.write(f"  {guild_name}: {guild_total}\n")
        
        f.write("\nMessages per channel:\n")
        for guild_name, channels in all_scraped_messages.items():
            for channel_id, messages in channels.items():
                f.write(f"  {guild_name} > {channel_id}: {len(messages)}\n")
    
    print(f"\nResults saved to: {output_folder}")
    print(f"  - raw_messages.json (complete data)")
    print(f"  - formatted_messages.txt (readable format)")
    print(f"  - stats.txt (summary)")

if __name__ == "__main__":
    main()