import discord
from discord.ext import commands
from discord import app_commands
import sqlite3

class Leaderboard(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

    @app_commands.command(
        name="leaderboard",
        description="Best players by accuracy"
    )
    async def leaderboard(self, interaction: discord.Interaction):
        conn = sqlite3.connect("Goonerdle.db")
        cursor = conn.cursor()

        try:
            cursor.execute("""
                SELECT 
                    User_ID,
                    COUNT(*) as games_played,
                    SUM(Result) as total_correct
                FROM Result
                GROUP BY User_ID
            """)

            rows = cursor.fetchall()

            if not rows:
                await interaction.response.send_message("No data available.")
                return

            leaderboard_data = []

            #  Calculate accuracy
            for user_id, games_played, total_correct in rows:
                total_possible = games_played * 10
                accuracy = (total_correct / total_possible) * 100

                leaderboard_data.append((user_id, accuracy, games_played))

            #  Sort by accuracy descending
            leaderboard_data.sort(key=lambda x: x[1], reverse=True)

            #  Build leaderboard text
            lines = []
            position = 1

            for user_id, accuracy, games_played in leaderboard_data[:10]:
                #  Try cache first
                user = self.bot.get_user(user_id)

                #  Fetch if not cached
                if user is None:
                    try:
                        user = await self.bot.fetch_user(user_id)
                    except e:
                        user = None

                #  NO PINGS → use display name or username
                if user:
                    name = user.display_name if hasattr(user, "display_name") else user.name
                else:
                    name = f"User {user_id}"

                line = f"{position}. {name} — **{accuracy:.2f}%** ({games_played} games)"
                lines.append(line)

                position += 1

            msg = "🏆 **Accuracy Leaderboard** 🏆\n\n" + "\n".join(lines)

            await interaction.response.send_message(msg)

        except Exception as e:
            print("Leaderboard error:", e)
            await interaction.response.send_message("Error loading leaderboard.")

        finally:
            conn.close()


async def setup(bot):
    await bot.add_cog(Leaderboard(bot))