# modules/usage/usage_stats.py
from __future__ import annotations
from discord.ext import commands
import discord

COUNTER_KEY_PREFIX = "cmd::"

def _key_from_app(cmd: discord.app_commands.Command) -> str:
    name = getattr(cmd, "qualified_name", None) or getattr(cmd, "name", "unknown")
    return f"{COUNTER_KEY_PREFIX}{name}"

def _key_from_ctx(ctx: commands.Context) -> str:
    c = getattr(ctx, "command", None)
    name = getattr(c, "qualified_name", None) or getattr(c, "name", "unknown")
    return f"{COUNTER_KEY_PREFIX}{name}"

class UsageStatsCog(commands.Cog):
    """Count command runs once: app for slash, prefix for non-interaction Context."""

    def __init__(self, bot: commands.Bot):
        self.bot = bot
        print("[usage] UsageStatsCog init")

    # -------- slash / app-commands --------
    @commands.Cog.listener()
    async def on_app_command_completion(self, interaction: discord.Interaction, command: discord.app_commands.Command):
        dm = getattr(self.bot, "data_manager", None)
        if not dm:
            return
        try:
            key = _key_from_app(command)
            newv = dm.incr_counter(key, 1)
            print(f"[usage] app ++ {key} -> {newv}")
        except Exception as e:
            print("[usage] app !! incr failed:", repr(e))

    # -------- prefix (and hybrid-as-prefix) --------
    @commands.Cog.listener()
    async def on_command_completion(self, ctx: commands.Context):
        # If this Context came from a slash interaction (hybrid invoked via slash),
        # DO NOT count here—the app listener already did.
        if getattr(ctx, "interaction", None):
            print("[usage] px  ~~ skip: ctx.interaction is set (slash path already counted)")
            return

        dm = getattr(self.bot, "data_manager", None)
        if not dm:
            return
        try:
            key = _key_from_ctx(ctx)
            newv = dm.incr_counter(key, 1)
            print(f"[usage] px  ++ {key} -> {newv}")
        except Exception as e:
            print("[usage] px  !! incr failed:", repr(e))

async def setup(bot: commands.Bot):
    # Avoid double registration if extensions are discovered/reloaded twice
    if getattr(bot, "_usage_stats_loaded", False):
        print("[usage] UsageStatsCog already loaded; skipping duplicate add")
        return
    await bot.add_cog(UsageStatsCog(bot))
    bot._usage_stats_loaded = True
    print("[usage] UsageStatsCog loaded")