# This file is part of Senator Sperma
# Licensed under the GPL-3.0 License
# Copyright (C) 2026 Salmonik @ salmonik@tuta.io
# https://codeberg.org/salmonik/senator-sperma

import logging
import os
import urllib.parse
import asyncio
from os import PathLike
from typing import Awaitable, Callable, List, Tuple
import re
from yt_dlp import YoutubeDL

import discord
from discord.commands import OptionChoice
from discord.ext import commands

from cogs.music import media_processing
from cogs.utils.file_search import UniversalSearcher
from cogs.utils.settings import get_uploadurl
from cogs.utils.url_helper import clean_url_for_ytdlp
from cogs.voice import get_voice_manager

logger = logging.getLogger(__name__)

EXTERNAL_URL_PATTERN = re.compile(
    r"^https://(?=.*(?:youtube|youtu\.be|soundcloud|bandcamp))"
)


class PlayCommands(commands.Cog):
    """Discord slash commands for music playback."""

    def __init__(self, bot):
        from cogs.utils.temp import get_temp_dir

        self.bot = bot
        self.temp_dir = get_temp_dir()
        self.path_mapping = {}  # Maps display names to full paths

    @staticmethod
    async def _create_search_embed(
        candidates: List[str],
    ) -> Tuple[discord.Embed, discord.ui.View]:
        """Create an embed and view for search results."""
        embed = discord.Embed(
            title="Wyniki wyszukiwania",
            description="Wybierz plik do odtworzenia:",
            color=discord.Color.blue(),
        )

        view = discord.ui.View(disable_on_timeout=True)

        for i, candidate in enumerate(candidates, start=1):
            filename = candidate.split("/")[-1].split("?")[0]
            display_name = os.path.splitext(filename)[0]
            embed.add_field(name=f"{i}. {display_name}", value="\u200b", inline=False)

        return embed, view

    async def _handle_search_results(
        self,
        ctx: discord.ApplicationContext,
        candidates: List[str],
        play_callback: Callable[[discord.Interaction, str], Awaitable[None]],
    ) -> None:
        """Handle the display of search results and button interactions."""
        if not candidates:
            await ctx.respond("Nie znaleziono pliku do odtworzenia", ephemeral=True)
            return

        embed, view = await self._create_search_embed(candidates)

        # Add buttons for each candidate
        for i, candidate in enumerate(candidates, start=1):
            button = discord.ui.Button(label=f"Play {i}")

            async def button_callback(
                interaction: discord.Interaction, candidate_path=candidate
            ):
                await interaction.response.defer(ephemeral=True)
                await ctx.interaction.delete_original_response()
                try:
                    await play_callback(interaction, candidate_path)
                except Exception as e:
                    logger.error(f"Error in play callback: {str(e)}", exc_info=True)
                    await interaction.followup.send(
                        f"Wystąpił błąd podczas odtwarzania: {str(e)}", ephemeral=True
                    )

            button.callback = button_callback
            view.add_item(button)

        await ctx.respond(embed=embed, view=view, ephemeral=True)

    async def _search_autocomplete(
        self, ctx: discord.AutocompleteContext
    ) -> List[OptionChoice]:
        """Autocomplete handler for search queries."""
        if ctx.value.lower().startswith(("http://", "https://")):
            return []

        query = ctx.value.lower()
        try:
            results = await UniversalSearcher.search_copyparty_autocomplete_audio(
                query, max_results=25
            )
            choices = []
            self.path_mapping = {}  # Reset the mapping for each new query

            for url in results:
                filename = url.split("/")[-1]
                filename = filename.split("?")[0]  # Remove query params if any
                filename = urllib.parse.unquote(filename)  # Decode URL encoding
                display = os.path.splitext(filename)[0]  # Remove extension

                display = display.strip()

                if len(display) > 100:
                    display = display[:99] + "…"

                self.path_mapping[display] = url
                choices.append(OptionChoice(display, display))

                if len(choices) >= 25:
                    break

            return choices

        except Exception as e:
            logger.error(f"Error in autocomplete: {str(e)}", exc_info=True)
            return []

    async def _handle_compressed_file_play(
        self, ctx: discord.ApplicationContext, url: str
    ) -> None:
        """Download from copyparty, compress, then play locally."""
        import aiohttp

        local_path = None
        compressed_path = None
        try:
            async with aiohttp.ClientSession() as session:
                async with session.get(url) as response:
                    if response.status != 200:
                        await ctx.respond("Nie udało się pobrać pliku.", ephemeral=True)
                        return

                    filename = url.split("/")[-1].split("?")[0]
                    filename = urllib.parse.unquote(filename)
                    local_path = os.path.join(self.temp_dir, filename)
                    os.makedirs(self.temp_dir, exist_ok=True)

                    loop = asyncio.get_event_loop()
                    with open(local_path, "wb") as f:
                        async for chunk in response.content.iter_chunked(8192):
                            await loop.run_in_executor(None, f.write, chunk)

            compressed_path = await media_processing.AudioCompressor.compress(
                ctx, local_path
            )
            if not compressed_path:
                return

            await get_voice_manager(self.bot).play(
                ctx, compressed_path, delete_after_play=True
            )
        except Exception as e:
            logger.error(f"Error in compressed playback: {str(e)}", exc_info=True)
            await ctx.respond(f"Błąd: {str(e)}", ephemeral=True)
        finally:
            if local_path and os.path.exists(local_path):
                try:
                    os.remove(local_path)
                except Exception:
                    pass

    async def _handle_external_url_play(
        self, ctx: discord.ApplicationContext, url: str
    ) -> None:
        """Download from external URL, upload to copyparty, then play."""
        local_path = None
        try:
            ytdl_opts = {
                "outtmpl": os.path.join(self.temp_dir, "%(title)s.%(ext)s"),
                "postprocessors": [
                    {
                        "key": "FFmpegExtractAudio",
                        "preferredcodec": "mp3",
                        "preferredquality": "192",
                    }
                ],
                "force_ipv4": True,
            }

            loop = asyncio.get_event_loop()
            url = clean_url_for_ytdlp(url)
            with YoutubeDL(ytdl_opts) as ydl:
                info_dict = await loop.run_in_executor(
                    None, lambda: ydl.extract_info(url, download=True)
                )
                title = info_dict.get("title", "nieznany")
                base_filename = os.path.splitext(ydl.prepare_filename(info_dict))[0]
                local_path = f"{base_filename}.mp3"

            if not os.path.exists(local_path):
                await ctx.respond("Nie udało się pobrać pliku.", ephemeral=True)
                return

            upload_task = asyncio.create_task(self._upload_to_copyparty_async(local_path))

            await get_voice_manager(self.bot).play(
                ctx, local_path, delete_after_play=True
            )

            try:
                await asyncio.wait_for(upload_task, timeout=30.0)
            except asyncio.TimeoutError:
                logger.warning("Upload timed out")
        except Exception as e:
            logger.error(f"Error downloading external URL: {str(e)}", exc_info=True)
            if local_path and os.path.exists(local_path):
                try:
                    os.remove(local_path)
                except Exception:
                    pass
            await ctx.respond(f"Błąd pobierania: {str(e)}", ephemeral=True)

    async def _upload_to_copyparty_async(self, file_path: str) -> None:
        """Upload file to copyparty asynchronously (fire and forget)."""
        import aiohttp

        try:
            logger.info(f"Starting async upload: {file_path}")
            baseurl = get_uploadurl()
            password = os.getenv("COPYPARTY_PASSWORD", "")

            logger.info(f"Upload - baseurl: {baseurl}, password set: {bool(password)}")

            if baseurl == "http://localhost:3939":
                logger.warning("COPYPARTY_URL_UPLOAD not set! Using default")

            with open(file_path, "rb") as f:
                content = f.read()

            files = aiohttp.FormData()
            files.add_field(
                "f",
                content,
                filename=os.path.basename(file_path),
                content_type="application/octet-stream",
            )
            headers = {"Cookie": f"cppwd={password}"}
            params = {"j": "1", "ck": "b2"}

            logger.info(f"Posting to {baseurl}")
            async with aiohttp.ClientSession() as session:
                async with session.post(baseurl, data=files, headers=headers, params=params) as response:
                    text = await response.text()
                    logger.info(f"Upload response: {response.status} - {text[:200] if text else 'empty'}")

                    if response.status in [200, 201]:
                        result = await response.json()
                        logger.info(f"Uploaded to copyparty: {result.get('fileurl')}")
        except Exception as e:
            logger.error(f"Async upload failed: {e}", exc_info=True)

    async def _handle_local_file_play(
        self, ctx: discord.ApplicationContext, file: str, compressed: bool
    ) -> None:
        """Handle file playback from copyparty URL."""
        url = self.path_mapping.get(file, file)  # Look up URL from display name

        if compressed:
            await self._handle_compressed_file_play(ctx, url)
        else:
            await get_voice_manager(self.bot).play(ctx, url)

    @discord.slash_command(name="grajcuj", description="grajcujmy wszyscy!")
    async def play(
        self,
        ctx: discord.ApplicationContext,
        melodia: str = discord.Option(
            str,
            "odtwórz plik z serwera bądź strumienia",
            autocomplete=_search_autocomplete,
            required=False,
        ),
        file: discord.Attachment = discord.Option(
            discord.Attachment, "plik do zagrania", required=False
        ),
        compressed: bool = discord.Option(
            bool, "Czy skompresować dźwięk?", default=False
        ),
    ):
        """Odtwarza wybrany plik dźwiękowy lub stream internetowy."""
        await ctx.defer()

        if melodia and file:
            await ctx.respond(
                "Możesz podać plik z serwera LUB upload, nie oba naraz.", ephemeral=True
            )
            return

        if not melodia and not file:
            await ctx.respond("Musisz podać plik do odtworzenia.", ephemeral=True)
            return

        if file:
            file_path: PathLike[str] | str = os.path.join(self.temp_dir, file.filename)
            await file.save(file_path)
            await get_voice_manager(self.bot).play(ctx, file_path)
        else:
            try:
                if EXTERNAL_URL_PATTERN.match(melodia.lower()):
                    await self._handle_external_url_play(ctx, melodia)
                else:
                    await self._handle_local_file_play(ctx, melodia, compressed)
            except Exception as e:
                logger.error(f"Error playing: {str(e)}", exc_info=True)
                await ctx.respond(
                    f"Wystąpił błąd podczas odtworzenia: {str(e)}", ephemeral=True
                )


def setup(bot):
    bot.add_cog(PlayCommands(bot))