import asyncio
import os
import logging
from typing import Any, Optional, Literal, Union

from disagreement import (
    HybridContext,
    Client,
    User,
    Member,
    Role,
    Attachment,
    Message,
    Channel,
    ChannelType,
)
from disagreement.ext import commands
from disagreement.ext.commands import Cog, CommandContext
from disagreement.ext.app_commands import (
    AppCommandContext,
    AppCommandGroup,
    slash_command,
    user_command,
    message_command,
    hybrid_command,
)

# from disagreement.interactions import Interaction # Replaced by AppCommandContext

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

try:
    from dotenv import load_dotenv
except ImportError:  # pragma: no cover - example helper
    load_dotenv = None
    print("python-dotenv is not installed. Environment variables will not be loaded")

if load_dotenv:
    load_dotenv()


# --- Define a Test Cog ---
class TestCog(Cog):
    def __init__(self, client: Client):
        super().__init__(client)

    @slash_command(name="greet", description="Sends a greeting.")
    async def greet_slash(self, ctx: AppCommandContext, name: str):
        await ctx.send(f"Hello, {name}! (Slash)")

    @user_command(name="Show User Info")
    async def show_user_info_user(
        self, ctx: AppCommandContext, user: User
    ):  # Target user is in ctx.interaction.data.target_id and resolved
        target_user = (
            ctx.interaction.data.resolved.users.get(ctx.interaction.data.target_id)
            if ctx.interaction.data
            and ctx.interaction.data.resolved
            and ctx.interaction.data.target_id
            else user
        )
        if target_user:
            await ctx.send(
                f"User: {target_user.username}#{target_user.discriminator} (ID: {target_user.id}) (User Cmd)",
                ephemeral=True,
            )
        else:
            await ctx.send("Could not find user information.", ephemeral=True)

    @message_command(name="Quote Message")
    async def quote_message_msg(
        self, ctx: AppCommandContext, message: Message
    ):  # Target message is in ctx.interaction.data.target_id and resolved
        target_message = (
            ctx.interaction.data.resolved.messages.get(ctx.interaction.data.target_id)
            if ctx.interaction.data
            and ctx.interaction.data.resolved
            and ctx.interaction.data.target_id
            else message
        )
        if target_message:
            await ctx.send(
                f'Quoting {target_message.author.username}: "{target_message.content}" (Message Cmd)',
                ephemeral=True,
            )
        else:
            await ctx.send("Could not find message to quote.", ephemeral=True)

    @hybrid_command(name="ping", description="Checks bot latency.", aliases=["pong"])
    async def ping_hybrid(
        self, ctx: Union[CommandContext, AppCommandContext], arg: Optional[str] = None
    ):
        latency = self.client.latency
        latency_ms = f"{latency * 1000:.0f}" if latency is not None else "N/A"
        hybrid = HybridContext(ctx)
        await hybrid.send(f"Pong! {latency_ms}ms. Arg: {arg} (Hybrid)")

    @slash_command(name="options_test", description="Tests various option types.")
    async def options_test_slash(
        self,
        ctx: AppCommandContext,
        text: str,
        integer: int,
        boolean: bool,
        number: float,
        user_option: User,
        role_option: Role,
        attachment_option: Attachment,
        choice_option_str: Literal["apple", "banana", "cherry"],
        # Channel and member options as well as numeric Literal choices are
        # not yet exercised in tests pending full library support.
    ):
        response_parts = [
            f"Text: {text}",
            f"Integer: {integer}",
            f"Boolean: {boolean}",
            f"Number: {number}",
            f"User: {user_option.username}#{user_option.discriminator}",
            f"Role: {role_option.name}",
            f"Attachment: {attachment_option.filename} (URL: {attachment_option.url})",
            f"Choice Str: {choice_option_str}",
        ]
        await ctx.send("\n".join(response_parts), ephemeral=True)

    # --- Subcommand Group Test ---
    # Define the group as a class attribute.
    # The AppCommandHandler's discovery mechanism (via Cog) should pick up AppCommandGroup instances.
    settings_group = AppCommandGroup(
        name="settings",
        description="Manage bot settings.",
        # guild_ids can be added here if the group is guild-specific
    )

    @slash_command(
        name="show", description="Shows current setting values.", parent=settings_group
    )
    async def settings_show(
        self, ctx: AppCommandContext, setting_name: Optional[str] = None
    ):
        if setting_name:
            await ctx.send(
                f"Showing value for setting: {setting_name} (Value: Placeholder)",
                ephemeral=True,
            )
        else:
            await ctx.send(
                "Showing all settings: (Placeholder for all settings)", ephemeral=True
            )

    @slash_command(
        name="update", description="Updates a setting.", parent=settings_group
    )
    async def settings_update(
        self, ctx: AppCommandContext, setting_name: str, value: str
    ):
        await ctx.send(
            f"Updated setting: {setting_name} to value: {value}", ephemeral=True
        )

    # The Cog's metaclass or command registration logic should handle adding `settings_group`
    # (and its subcommands) to the client's AppCommandHandler.
    # The decorators now handle associating subcommands with their parent group.

    @slash_command(
        name="numeric_choices_test", description="Tests integer and float choices."
    )
    async def numeric_choices_test_slash(
        self,
        ctx: AppCommandContext,
        int_choice: Literal[10, 20, 30, 42],
        float_choice: float,
    ):
        response = (
            f"Integer Choice: {int_choice} (Type: {type(int_choice).__name__})\n"
            f"Float Choice: {float_choice} (Type: {type(float_choice).__name__})"
        )
        await ctx.send(response, ephemeral=True)

    @slash_command(
        name="numeric_choices_extended",
        description="Tests additional integer and float choice handling.",
    )
    async def numeric_choices_extended_slash(
        self,
        ctx: AppCommandContext,
        int_choice: Literal[-5, 0, 5],
        float_choice: float,
    ):
        response = (
            f"Int Choice: {int_choice} (Type: {type(int_choice).__name__})\n"
            f"Float Choice: {float_choice} (Type: {type(float_choice).__name__})"
        )
        await ctx.send(response, ephemeral=True)

    @slash_command(
        name="channel_member_test",
        description="Tests channel and member options.",
    )
    async def channel_member_test_slash(
        self,
        ctx: AppCommandContext,
        channel: Channel,
        member: Member,
    ):
        response = (
            f"Channel: {channel.name} (Type: {channel.type.name})\n"
            f"Member: {member.username}#{member.discriminator}"
        )
        await ctx.send(response, ephemeral=True)

    @slash_command(
        name="channel_types_test",
        description="Demonstrates multiple channel type options.",
    )
    async def channel_types_test_slash(
        self,
        ctx: AppCommandContext,
        text_channel: Channel,
        voice_channel: Channel,
        category_channel: Channel,
    ):
        response = (
            f"Text: {text_channel.type.name}\n"
            f"Voice: {voice_channel.type.name}\n"
            f"Category: {category_channel.type.name}"
        )
        await ctx.send(response, ephemeral=True)


# --- Main Bot Script ---
async def main():
    bot_token = os.getenv("DISCORD_BOT_TOKEN")
    application_id = os.getenv("DISCORD_APPLICATION_ID")

    if not bot_token:
        logger.error("Error: DISCORD_BOT_TOKEN environment variable not set.")
        return
    if not application_id:
        logger.error("Error: DISCORD_APPLICATION_ID environment variable not set.")
        return

    client = Client(token=bot_token, command_prefix="!", application_id=application_id)

    @client.event
    async def on_ready():
        if client.user:
            logger.info(
                f"Bot logged in as {client.user.username}#{client.user.discriminator}"
            )
        else:
            logger.error(
                "Client ready, but client.user is not populated! This should not happen."
            )
            return  # Avoid proceeding if basic client info isn't there

        if client.application_id:
            logger.info(f"Application ID is: {client.application_id}")
            # Sync application commands (global in this case)
            try:
                logger.info("Attempting to sync application commands...")
                # Ensure application_id is not None before passing
                app_id_to_sync = client.application_id
                if (
                    app_id_to_sync is not None
                ):  # Redundant due to outer if, but good for clarity
                    await client.app_command_handler.sync_commands(
                        application_id=app_id_to_sync
                    )
                    logger.info("Application commands synced successfully.")
                else:  # Should not be reached if outer if client.application_id is true
                    logger.error(
                        "Application ID was None despite initial check. Skipping sync."
                    )
            except Exception as e:
                logger.error(f"Error syncing application commands: {e}", exc_info=True)
        else:
            # This case should be less likely now that Client gets it from READY.
            # If DISCORD_APPLICATION_ID was critical as a fallback, that logic would be here.
            # For now, we rely on the READY event.
            logger.warning(
                "Client's application ID is not set after READY. Skipping application command sync."
            )
            # Check if the environment variable was provided, as a diagnostic.
            if not application_id:
                logger.warning(
                    "DISCORD_APPLICATION_ID environment variable was also not provided."
                )

    client.add_cog(TestCog(client))

    try:
        await client.run()
    except KeyboardInterrupt:
        logger.info("Bot shutting down...")
    except Exception as e:
        logger.error(
            f"An error occurred in the bot's main run loop: {e}", exc_info=True
        )
    finally:
        if not client.is_closed():
            await client.close()
        logger.info("Bot has been closed.")


if __name__ == "__main__":
    # For Windows, to allow graceful shutdown with Ctrl+C
    if os.name == "nt":
        asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

    try:
        asyncio.run(main())
    except KeyboardInterrupt:
        logger.info("Main loop interrupted. Exiting.")