import json
import os
from collections import defaultdict
from functools import lru_cache

import argilla as rg
import pandas as pd
from dotenv import load_dotenv

load_dotenv()

# Constants
DATA_DIR = "data"
PARTICIPANTS_CSV = os.path.join(DATA_DIR, "participants.csv")
EQUIPOS_CSV = os.path.join(DATA_DIR, "equipos.csv")
LEADERBOARD_PERSONAL_CSV = "leaderboard_personal.csv"
LEADERBOARD_EQUIPOS_CSV = "leaderboard_equipos.csv"

# Column mappings for participants info
COLUMN_MAP = {
    "gmail": "Dirección de correo electrónico",
    "discord": "¿Cuál es tu nombre en Discord?",
    "hf_username": "¿Cuál es tu nombre en el Hub de Hugging Face?",
    "contact_email": "Email de contacto",
}


# Initialize Argilla client
try:
    client = rg.Argilla(
        api_url=os.getenv("ARGILLA_API_URL", ""),
        api_key=os.getenv("ARGILLA_API_KEY", ""),
    )
except Exception as e:
    print(f"Error initializing Argilla client: {e}")
    client = None

# Countries data
countries = {
    "Argentina": {"iso": "ARG", "emoji": "🇦🇷"},
    "Bolivia": {"iso": "BOL", "emoji": "🇧🇴"},
    "Chile": {"iso": "CHL", "emoji": "🇨🇱"},
    "Colombia": {"iso": "COL", "emoji": "🇨🇴"},
    "Costa Rica": {"iso": "CRI", "emoji": "🇨🇷"},
    "Cuba": {"iso": "CUB", "emoji": "🇨🇺"},
    "Ecuador": {"iso": "ECU", "emoji": "🇪🇨"},
    "El Salvador": {"iso": "SLV", "emoji": "🇸🇻"},
    "España": {"iso": "ESP", "emoji": "🇪🇸"},
    "Guatemala": {"iso": "GTM", "emoji": "🇬🇹"},
    "Honduras": {"iso": "HND", "emoji": "🇭🇳"},
    "México": {"iso": "MEX", "emoji": "🇲🇽"},
    "Nicaragua": {"iso": "NIC", "emoji": "🇳🇮"},
    "Panamá": {"iso": "PAN", "emoji": "🇵🇦"},
    "Paraguay": {"iso": "PRY", "emoji": "🇵🇾"},
    "Perú": {"iso": "PER", "emoji": "🇵🇪"},
    "Puerto Rico": {"iso": "PRI", "emoji": "🇵🇷"},
    "República Dominicana": {"iso": "DOM", "emoji": "🇩🇴"},
    "Uruguay": {"iso": "URY", "emoji": "🇺🇾"},
    "Venezuela": {"iso": "VEN", "emoji": "🇻🇪"},
}


@lru_cache(maxsize=1)
def get_user_mapping():
    """Get cached mapping of emails and hf_usernames to discord usernames."""
    if not os.path.exists(PARTICIPANTS_CSV):
        return {}, {}

    try:
        df = pd.read_csv(PARTICIPANTS_CSV)
        email_to_discord = {}
        hf_to_discord = {}

        for _, row in df.iterrows():
            discord = row.get(COLUMN_MAP["discord"], "")
            if pd.notna(discord) and discord != "NA":
                discord_lower = discord.lower()

                # Map gmail to discord
                gmail = row.get(COLUMN_MAP["gmail"], "")
                if pd.notna(gmail) and gmail.strip():
                    email_to_discord[gmail.lower()] = discord_lower

                # Map contact_email to discord
                contact_email = row.get(COLUMN_MAP["contact_email"], "")
                if pd.notna(contact_email) and contact_email.strip():
                    email_to_discord[contact_email.lower()] = discord_lower

                # Map hf_username to discord
                hf_username = row.get(COLUMN_MAP["hf_username"], "")
                if pd.notna(hf_username) and hf_username.strip():
                    hf_to_discord[hf_username.lower()] = discord_lower

        return email_to_discord, hf_to_discord
    except Exception as e:
        print(f"Error loading {PARTICIPANTS_CSV}: {e}")
        return {}, {}


def get_discord_username(identifier):
    """Get discord username from email or hf_username."""
    email_to_discord, hf_to_discord = get_user_mapping()

    if "@" in identifier:
        return email_to_discord.get(identifier.lower(), identifier.split("@")[0])

    return hf_to_discord.get(identifier.lower(), identifier)


def get_participant_info():
    """Get participant information from CSV."""
    if not os.path.exists(PARTICIPANTS_CSV):
        return {}

    try:
        df = pd.read_csv(PARTICIPANTS_CSV)
        participant_info = {}

        for _, row in df.iterrows():
            discord_username = row.get(COLUMN_MAP["discord"], "")
            if pd.notna(discord_username) and discord_username != "NA":
                participant_info[discord_username.lower()] = {
                    "gmail": row.get(COLUMN_MAP["gmail"], ""),
                    "discord_username": discord_username,
                    "hf_username": row.get(COLUMN_MAP["hf_username"], ""),
                    "email": row.get(COLUMN_MAP["contact_email"], ""),
                }

        return participant_info
    except Exception as e:
        print(f"Error loading participant info: {e}")
        return {}


def get_blend_es_data():
    """Get blend-es data from Argilla."""
    if not client:
        return []

    data = []
    for country, info in countries.items():
        dataset_name = f"{info['emoji']} {country} - {info['iso']} - Responder"

        try:
            dataset = client.datasets(dataset_name)
            records = list(dataset.records(with_responses=True))

            user_counts = defaultdict(int)
            user_mapping = {}

            for record in records:
                if "answer_1" in record.responses:
                    for answer in record.responses["answer_1"]:
                        if answer.user_id:
                            user_id = answer.user_id
                            user_counts[user_id] += 1

                            if user_id not in user_mapping:
                                try:
                                    user = client.users(id=user_id)
                                    user_mapping[user_id] = user.username
                                except:
                                    user_mapping[user_id] = f"User-{user_id[:8]}"

            for user_id, count in user_counts.items():
                hf_username = user_mapping.get(user_id, f"User-{user_id[:8]}")
                username = get_discord_username(hf_username)
                data.append(
                    {"source": "blend-es", "username": username, "count": count}
                )

        except Exception as e:
            print(f"Error processing {dataset_name}: {e}")

    return data


def get_include_data():
    """Get include data from CSV."""
    csv_path = os.path.join(DATA_DIR, "include.csv")
    if not os.path.exists(csv_path):
        return []

    try:
        df = pd.read_csv(csv_path)
        username_col = "Nombre en Discord / username"
        questions_col = "Total preguntas hackathon"

        if username_col not in df.columns or questions_col not in df.columns:
            return []

        user_counts = defaultdict(int)
        for _, row in df.iterrows():
            username = row[username_col][1:] if pd.notna(row[username_col]) else ""
            questions = row[questions_col] if pd.notna(row[questions_col]) else 0
            if username and questions:
                user_counts[username.lower()] += int(questions)

        return [
            {"source": "include", "username": username, "count": count}
            for username, count in user_counts.items()
        ]
    except Exception as e:
        print(f"Error loading include data: {e}")
        return []


def get_estereotipos_data():
    """Get estereotipos data from CSV."""
    csv_path = os.path.join(DATA_DIR, "stereotypes.csv")
    if not os.path.exists(csv_path):
        return []

    try:
        df = pd.read_csv(csv_path)
        if "token_id" not in df.columns or "count" not in df.columns:
            return []

        user_counts = defaultdict(int)
        for _, row in df.iterrows():
            mail = row.get("token_id", "")
            count = row.get("count", 0)
            if pd.notna(mail) and pd.notna(count):
                user_counts[mail.lower()] += int(count)

        return [
            {
                "source": "estereotipos",
                "username": get_discord_username(mail),
                "count": count,
            }
            for mail, count in user_counts.items()
        ]
    except Exception as e:
        print(f"Error loading estereotipos data: {e}")
        return []


def get_arena_data():
    """Get arena data from CSV."""
    csv_path = os.path.join(DATA_DIR, "arena_data_cruzada.csv")
    if not os.path.exists(csv_path):
        return []

    try:
        df = pd.read_csv(csv_path)

        # Check if username column exists
        if "username" not in df.columns:
            print("Error: 'username' column not found in arena_data_cruzada.csv")
            return []

        user_counts = defaultdict(int)
        for _, row in df.iterrows():
            username = row.get("username", "")
            if pd.notna(username) and username.strip():
                user_counts[username.lower()] += 1

        return [
            {"source": "arena", "username": get_discord_username(email), "count": count}
            for email, count in user_counts.items()
        ]
    except Exception as e:
        print(f"Error loading arena data: {e}")
        return []


def create_challenge_leaderboards(display_df):
    """Create individual CSV files for each challenge."""

    # Create leaderboards directory if it doesn't exist
    import os

    leaderboards_dir = "leaderboards"
    os.makedirs(leaderboards_dir, exist_ok=True)

    for challenge in ["Arena", "Blend-ES", "Estereotipos", "INCLUDE"]:
        if challenge in display_df.columns:
            # Create challenge-specific dataframe with only username and challenge score
            challenge_df = display_df[["Username", challenge]].copy()

            # Sort by score (descending) and then by username (ascending) for ties
            challenge_df = challenge_df.sort_values(
                [challenge, "Username"], ascending=[False, True]
            )

            # Generate filenames in leaderboards directory
            clean_challenge = challenge.replace(" ", "_").replace("-", "_")
            csv_filename = os.path.join(
                leaderboards_dir, f"leaderboard_{clean_challenge.lower()}.csv"
            )
            txt_filename = os.path.join(
                leaderboards_dir, f"leaderboard_{clean_challenge.lower()}.txt"
            )

            # Save to CSV (include all participants)
            challenge_df.to_csv(csv_filename, index=False, encoding="utf-8")
            print(f"Created {csv_filename} with {len(challenge_df)} participants")

            # Save to TXT as markdown table (exclude users with 0 scores)
            with open(txt_filename, "w", encoding="utf-8") as f:
                f.write(f"# {challenge} Leaderboard\n\n")
                f.write("| Puesto | Discord ID | Puntuación |\n")
                f.write("|------|----------|-------|\n")

                rank = 1
                for _, row in challenge_df.iterrows():
                    username = row["Username"]
                    score = row[challenge]

                    # Skip users with 0 scores
                    if score == 0:
                        continue

                    # Use medal emojis for top 3 ranks
                    if rank == 1:
                        rank_display = "🥇"
                    elif rank == 2:
                        rank_display = "🥈"
                    elif rank == 3:
                        rank_display = "🥉"
                    else:
                        rank_display = str(rank)

                    f.write(f"| {rank_display} | {username} | {score} |\n")
                    rank += 1

            print(
                f"Created {txt_filename} with markdown table format (excluding 0 scores)"
            )

            # Show top 5 scores
            print(f"Top 5 {challenge} scores:")
            for i, (_, row) in enumerate(challenge_df.head().iterrows(), 1):
                print(f"  {i}. {row['Username']}: {row[challenge]}")
            print()


def calculate_personal_scores():
    """Consolidate all data sources and create leaderboard."""
    # Collect all data
    all_data = (
        get_blend_es_data()
        + get_include_data()
        + get_estereotipos_data()
        + get_arena_data()
    )

    # Get participant info
    participant_info = get_participant_info()

    # Aggregate user contributions
    user_contributions = defaultdict(
        lambda: {
            "username": "",
            "gmail": "",
            "discord_username": "",
            "hf_username": "",
            "email": "",
            "blend_es": 0,
            "include": 0,
            "estereotipos": 0,
            "arena": 0,
        }
    )

    for item in all_data:
        source = item["source"]
        username = item["username"]
        count = item["count"]
        user_key = username.lower()

        if not user_contributions[user_key]["username"]:
            user_contributions[user_key]["username"] = username
            if username.lower() in participant_info:
                info = participant_info[username.lower()]
                user_contributions[user_key].update(
                    {
                        "gmail": info["gmail"],
                        "discord_username": info["discord_username"],
                        "hf_username": info["hf_username"],
                        "email": info["email"],
                    }
                )

        if source == "blend-es":
            user_contributions[user_key]["blend_es"] += count
        elif source == "include":
            user_contributions[user_key]["include"] += count
        elif source == "estereotipos":
            user_contributions[user_key]["estereotipos"] += count
        elif source == "arena":
            user_contributions[user_key]["arena"] += count

    # Create dataframes
    full_rows = []
    display_rows = []

    for data in user_contributions.values():
        # Full data for CSV
        full_rows.append(
            {
                "Username": data["username"],
                "Gmail": data["gmail"],
                "Discord_Username": data["discord_username"],
                "HF_Username": data["hf_username"],
                "Email": data["email"],
                "Arena": data["arena"],
                "Blend-ES": data["blend_es"],
                "Estereotipos": data["estereotipos"],
                "INCLUDE": data["include"],
            }
        )

        # Display data for UI (public)
        display_rows.append(
            {
                "Username": data["username"],
                "Arena": data["arena"],
                "Blend-ES": data["blend_es"],
                "Estereotipos": data["estereotipos"],
                "INCLUDE": data["include"],
            }
        )

    # Save full data to CSV
    full_df = pd.DataFrame(full_rows)
    if not full_df.empty:
        full_df.sort_values("Arena", ascending=False, inplace=True)
        full_df.to_csv(
            os.path.join(DATA_DIR, LEADERBOARD_PERSONAL_CSV),
            index=False,
            encoding="utf-8",
        )

    # Return display dataframe for UI
    display_df = pd.DataFrame(display_rows)
    if not display_df.empty:
        display_df.sort_values("Arena", ascending=False, inplace=True)
        display_df.to_csv(
            os.path.join(LEADERBOARD_PERSONAL_CSV), index=False, encoding="utf-8"
        )

        # Create individual challenge leaderboards
        print("\nCreating individual challenge leaderboards...")
        create_challenge_leaderboards(display_df)

    return display_df


if __name__ == "__main__":
    calculate_personal_scores()