"""
Interactive Trade Embed Views

Handles the Discord embed and button interfaces for the multi-team trade builder.
"""

import discord
from typing import Optional, List
from datetime import datetime, timezone

from services.trade_builder import TradeBuilder, clear_trade_builder_by_team
from services.team_service import team_service
from services.league_service import league_service
from services.transaction_service import transaction_service
from models.team import Team, RosterType
from models.trade import TradeStatus
from models.transaction import Transaction
from views.embeds import EmbedColors, EmbedTemplate
from utils.transaction_logging import post_trade_to_log
from config import get_config


class TradeEmbedView(discord.ui.View):
    """Interactive view for the trade builder embed."""

    def __init__(self, builder: TradeBuilder, user_id: int):
        """
        Initialize the trade embed view.

        Args:
            builder: TradeBuilder instance
            user_id: Discord user ID (for permission checking)
        """
        super().__init__(timeout=900.0)  # 15 minute timeout
        self.builder = builder
        self.user_id = user_id

    async def interaction_check(self, interaction: discord.Interaction) -> bool:
        """Check if user has permission to interact with this view."""
        if interaction.user.id != self.user_id:
            await interaction.response.send_message(
                "You don't have permission to use this trade builder.",
                ephemeral=True,
            )
            return False
        return True

    async def on_timeout(self) -> None:
        """Handle view timeout."""
        for item in self.children:
            if isinstance(item, discord.ui.Button):
                item.disabled = True

    @discord.ui.button(label="Remove Move", style=discord.ButtonStyle.red)
    async def remove_move_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle remove move button click."""
        if self.builder.is_empty:
            await interaction.response.send_message(
                "No moves to remove. Add some moves first!", ephemeral=True
            )
            return

        select_view = RemoveTradeMovesView(self.builder, self.user_id)
        embed = await create_trade_embed(self.builder)

        await interaction.response.edit_message(embed=embed, view=select_view)

    @discord.ui.button(label="Validate Trade", style=discord.ButtonStyle.secondary)
    async def validate_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle validate trade button click."""
        await interaction.response.defer(ephemeral=True)

        validation = await self.builder.validate_trade()

        if validation.is_legal:
            status_text = "**Trade is LEGAL**"
            color = EmbedColors.SUCCESS
        else:
            status_text = "**Trade has ERRORS**"
            color = EmbedColors.ERROR

        embed = EmbedTemplate.create_base_embed(
            title="Trade Validation Report",
            description=status_text,
            color=color,
        )

        for participant in self.builder.trade.participants:
            team_validation = validation.get_participant_validation(participant.team.id)
            if team_validation:
                team_status = []
                team_status.append(team_validation.major_league_status)
                team_status.append(team_validation.minor_league_status)
                team_status.append(team_validation.major_league_swar_status)
                team_status.append(team_validation.minor_league_swar_status)

                if team_validation.pre_existing_transactions_note:
                    team_status.append(team_validation.pre_existing_transactions_note)

                embed.add_field(
                    name=f"{participant.team.abbrev} - {participant.team.sname}",
                    value="\n".join(team_status),
                    inline=False,
                )

        if validation.all_errors:
            error_text = "\n".join([f"- {error}" for error in validation.all_errors])
            embed.add_field(name="Errors", value=error_text, inline=False)

        if validation.all_suggestions:
            suggestion_text = "\n".join(
                [f"- {suggestion}" for suggestion in validation.all_suggestions]
            )
            embed.add_field(name="Suggestions", value=suggestion_text, inline=False)

        await interaction.followup.send(embed=embed, ephemeral=True)

    @discord.ui.button(label="Submit Trade", style=discord.ButtonStyle.primary)
    async def submit_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle submit trade button click."""
        # Check trade deadline
        current = await league_service.get_current_state()
        if not current:
            await interaction.response.send_message(
                "❌ Could not retrieve league state. Please try again later.",
                ephemeral=True,
            )
            return
        if current.is_past_trade_deadline:
            await interaction.response.send_message(
                f"❌ **The trade deadline has passed** (Week {current.trade_deadline}). "
                f"This trade can no longer be submitted.",
                ephemeral=True,
            )
            return

        if self.builder.is_empty:
            await interaction.response.send_message(
                "Cannot submit empty trade. Add some moves first!", ephemeral=True
            )
            return

        validation = await self.builder.validate_trade()
        if not validation.is_legal:
            error_msg = "**Cannot submit illegal trade:**\n"
            error_msg += "\n".join([f"- {error}" for error in validation.all_errors])

            if validation.all_suggestions:
                error_msg += "\n\n**Suggestions:**\n"
                error_msg += "\n".join(
                    [f"- {suggestion}" for suggestion in validation.all_suggestions]
                )

            await interaction.response.send_message(error_msg, ephemeral=True)
            return

        modal = SubmitTradeConfirmationModal(self.builder)
        await interaction.response.send_modal(modal)

    @discord.ui.button(label="Cancel Trade", style=discord.ButtonStyle.secondary)
    async def cancel_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle cancel trade button click."""
        self.builder.clear_trade()
        embed = await create_trade_embed(self.builder)

        for item in self.children:
            if isinstance(item, discord.ui.Button):
                item.disabled = True

        await interaction.response.edit_message(
            content="**Trade cancelled and cleared.**", embed=embed, view=self
        )
        self.stop()


class RemoveTradeMovesView(discord.ui.View):
    """View for selecting which trade move to remove."""

    def __init__(self, builder: TradeBuilder, user_id: int):
        super().__init__(timeout=300.0)  # 5 minute timeout
        self.builder = builder
        self.user_id = user_id

        if not builder.is_empty:
            self.add_item(RemoveTradeMovesSelect(builder))

        back_button = discord.ui.Button(
            label="Back", style=discord.ButtonStyle.secondary
        )
        back_button.callback = self.back_callback
        self.add_item(back_button)

    async def back_callback(self, interaction: discord.Interaction):
        """Handle back button to return to main view."""
        main_view = TradeEmbedView(self.builder, self.user_id)
        embed = await create_trade_embed(self.builder)
        await interaction.response.edit_message(embed=embed, view=main_view)

    async def interaction_check(self, interaction: discord.Interaction) -> bool:
        """Check if user has permission to interact with this view."""
        return interaction.user.id == self.user_id


class RemoveTradeMovesSelect(discord.ui.Select):
    """Select menu for choosing which trade move to remove."""

    def __init__(self, builder: TradeBuilder):
        self.builder = builder

        options = []
        move_count = 0

        for move in builder.trade.cross_team_moves[
            :20
        ]:  # Limit to avoid Discord's 25 option limit
            options.append(
                discord.SelectOption(
                    label=f"{move.player.name}",
                    description=move.description[:100],
                    value=str(move.player.id),
                )
            )
            move_count += 1

        remaining_slots = 25 - move_count
        for move in builder.trade.supplementary_moves[:remaining_slots]:
            options.append(
                discord.SelectOption(
                    label=f"{move.player.name}",
                    description=move.description[:100],
                    value=str(move.player.id),
                )
            )

        super().__init__(
            placeholder="Select a move to remove...",
            min_values=1,
            max_values=1,
            options=options,
        )

    async def callback(self, interaction: discord.Interaction):
        """Handle move removal selection."""
        player_id = int(self.values[0])

        success, error_msg = await self.builder.remove_move(player_id)

        if success:
            await interaction.response.send_message(
                f"Removed move for player ID {player_id}", ephemeral=True
            )

            main_view = TradeEmbedView(self.builder, interaction.user.id)
            embed = await create_trade_embed(self.builder)

            await interaction.edit_original_response(embed=embed, view=main_view)
        else:
            await interaction.response.send_message(
                f"Could not remove move: {error_msg}", ephemeral=True
            )


class SubmitTradeConfirmationModal(discord.ui.Modal):
    """Modal for confirming trade submission - posts acceptance request to trade channel."""

    def __init__(
        self, builder: TradeBuilder, trade_channel: Optional[discord.TextChannel] = None
    ):
        super().__init__(title="Confirm Trade Submission")
        self.builder = builder
        self.trade_channel = trade_channel

        self.confirmation = discord.ui.TextInput(
            label="Type 'CONFIRM' to submit for approval",
            placeholder="CONFIRM",
            required=True,
            max_length=7,
        )

        self.add_item(self.confirmation)

    async def on_submit(self, interaction: discord.Interaction):
        """Handle confirmation submission - posts acceptance view to trade channel."""
        if self.confirmation.value.upper() != "CONFIRM":
            await interaction.response.send_message(
                "Trade not submitted. You must type 'CONFIRM' exactly.",
                ephemeral=True,
            )
            return

        await interaction.response.defer(ephemeral=True)

        try:
            self.builder.trade.status = TradeStatus.PROPOSED

            acceptance_embed = await create_trade_acceptance_embed(self.builder)
            acceptance_view = TradeAcceptanceView(self.builder)

            channel = self.trade_channel
            if not channel:
                for ch in interaction.guild.text_channels:  # type: ignore
                    if (
                        ch.name.startswith("trade-")
                        and self.builder.trade_id[:4] in ch.name
                    ):
                        channel = ch
                        break

            if channel:
                await channel.send(
                    content="**Trade submitted for approval.** All teams must accept to complete the trade.",
                    embed=acceptance_embed,
                    view=acceptance_view,
                )
                await interaction.followup.send(
                    f"Trade submitted for approval.\n\nThe acceptance request has been posted to {channel.mention}.\n"
                    f"All participating teams must click **Accept Trade** to finalize.",
                    ephemeral=True,
                )
            else:
                await interaction.followup.send(
                    content="**Trade submitted for approval.** All teams must accept to complete the trade.",
                    embed=acceptance_embed,
                    view=acceptance_view,
                )

        except Exception as e:
            await interaction.followup.send(
                f"Error submitting trade: {str(e)}", ephemeral=True
            )


class TradeAcceptanceView(discord.ui.View):
    """View for accepting or rejecting a proposed trade."""

    def __init__(self, builder: TradeBuilder):
        super().__init__(timeout=3600.0)  # 1 hour timeout
        self.builder = builder
        self._checked_teams: dict[int, Team] = {}

    async def _get_user_team(self, interaction: discord.Interaction) -> Optional[Team]:
        """Get the team owned by the interacting user."""
        config = get_config()
        return await team_service.get_team_by_owner(
            interaction.user.id, config.sba_season
        )

    async def interaction_check(self, interaction: discord.Interaction) -> bool:
        """Check if user is a GM of a participating team."""
        user_team = await self._get_user_team(interaction)

        if not user_team:
            await interaction.response.send_message(
                "You don't own a team in the league.", ephemeral=True
            )
            return False

        participant = self.builder.trade.get_participant_by_organization(user_team)
        if not participant:
            await interaction.response.send_message(
                "Your team is not part of this trade.", ephemeral=True
            )
            return False

        self._checked_teams[interaction.user.id] = user_team
        return True

    async def on_timeout(self) -> None:
        """Handle view timeout - disable buttons but keep trade in memory."""
        for item in self.children:
            if isinstance(item, discord.ui.Button):
                item.disabled = True

    @discord.ui.button(label="Accept Trade", style=discord.ButtonStyle.success)
    async def accept_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle accept button click."""
        user_team = self._checked_teams.get(interaction.user.id)
        if not user_team:
            return

        participant = self.builder.trade.get_participant_by_organization(user_team)
        if not participant:
            return

        team_id = participant.team.id

        if self.builder.has_team_accepted(team_id):
            await interaction.response.send_message(
                f"{participant.team.abbrev} has already accepted this trade.",
                ephemeral=True,
            )
            return

        all_accepted = self.builder.accept_trade(team_id)

        if all_accepted:
            await self._finalize_trade(interaction)
        else:
            embed = await create_trade_acceptance_embed(self.builder)
            await interaction.response.edit_message(embed=embed, view=self)

            await interaction.followup.send(
                f"**{participant.team.abbrev}** has accepted the trade. "
                f"({len(self.builder.accepted_teams)}/{self.builder.team_count} teams)"
            )

    @discord.ui.button(label="Reject Trade", style=discord.ButtonStyle.danger)
    async def reject_button(
        self, interaction: discord.Interaction, button: discord.ui.Button
    ):
        """Handle reject button click - moves trade back to DRAFT."""
        user_team = self._checked_teams.get(interaction.user.id)
        if not user_team:
            return

        participant = self.builder.trade.get_participant_by_organization(user_team)
        if not participant:
            return

        self.builder.reject_trade()

        self.accept_button.disabled = True
        self.reject_button.disabled = True

        embed = await create_trade_rejection_embed(self.builder, participant.team)
        await interaction.response.edit_message(embed=embed, view=self)

        await interaction.followup.send(
            f"**{participant.team.abbrev}** has rejected the trade.\n\n"
            f"The trade has been moved back to **DRAFT** status. "
            f"Teams can continue negotiating using `/trade` commands."
        )

        self.stop()

    async def _finalize_trade(self, interaction: discord.Interaction) -> None:
        """Finalize the trade - create transactions and complete."""
        try:
            await interaction.response.defer()

            config = get_config()

            current = await league_service.get_current_state()
            if not current or current.is_past_trade_deadline:
                deadline_msg = (
                    f"❌ **The trade deadline has passed** (Week {current.trade_deadline}). "
                    f"This trade cannot be finalized."
                    if current
                    else "❌ Could not retrieve league state. Please try again later."
                )
                await interaction.followup.send(deadline_msg, ephemeral=True)
                return
            next_week = current.week + 1

            fa_team = Team(
                id=config.free_agent_team_id,
                abbrev="FA",
                sname="Free Agents",
                lname="Free Agency",
                season=self.builder.trade.season,
            )  # type: ignore

            transactions: List[Transaction] = []
            move_id = f"Trade-{self.builder.trade_id}-{int(datetime.now(timezone.utc).timestamp())}"

            for move in self.builder.trade.cross_team_moves:
                if move.from_roster == RosterType.MAJOR_LEAGUE:
                    old_team = move.source_team
                elif move.from_roster == RosterType.MINOR_LEAGUE:
                    old_team = (
                        await move.source_team.minor_league_affiliate()
                        if move.source_team
                        else None
                    )
                elif move.from_roster == RosterType.INJURED_LIST:
                    old_team = (
                        await move.source_team.injured_list_affiliate()
                        if move.source_team
                        else None
                    )
                else:
                    old_team = move.source_team

                if move.to_roster == RosterType.MAJOR_LEAGUE:
                    new_team = move.destination_team
                elif move.to_roster == RosterType.MINOR_LEAGUE:
                    new_team = (
                        await move.destination_team.minor_league_affiliate()
                        if move.destination_team
                        else None
                    )
                elif move.to_roster == RosterType.INJURED_LIST:
                    new_team = (
                        await move.destination_team.injured_list_affiliate()
                        if move.destination_team
                        else None
                    )
                else:
                    new_team = move.destination_team

                if old_team and new_team:
                    transaction = Transaction(
                        id=0,
                        week=next_week,
                        season=self.builder.trade.season,
                        moveid=move_id,
                        player=move.player,
                        oldteam=old_team,
                        newteam=new_team,
                        cancelled=False,
                        frozen=False,
                    )
                    transactions.append(transaction)

            for move in self.builder.trade.supplementary_moves:
                if move.from_roster == RosterType.MAJOR_LEAGUE:
                    old_team = move.source_team
                elif move.from_roster == RosterType.MINOR_LEAGUE:
                    old_team = (
                        await move.source_team.minor_league_affiliate()
                        if move.source_team
                        else None
                    )
                elif move.from_roster == RosterType.INJURED_LIST:
                    old_team = (
                        await move.source_team.injured_list_affiliate()
                        if move.source_team
                        else None
                    )
                elif move.from_roster == RosterType.FREE_AGENCY:
                    old_team = fa_team
                else:
                    old_team = move.source_team

                if move.to_roster == RosterType.MAJOR_LEAGUE:
                    new_team = move.destination_team
                elif move.to_roster == RosterType.MINOR_LEAGUE:
                    new_team = (
                        await move.destination_team.minor_league_affiliate()
                        if move.destination_team
                        else None
                    )
                elif move.to_roster == RosterType.INJURED_LIST:
                    new_team = (
                        await move.destination_team.injured_list_affiliate()
                        if move.destination_team
                        else None
                    )
                elif move.to_roster == RosterType.FREE_AGENCY:
                    new_team = fa_team
                else:
                    new_team = move.destination_team

                if old_team and new_team:
                    transaction = Transaction(
                        id=0,
                        week=next_week,
                        season=self.builder.trade.season,
                        moveid=move_id,
                        player=move.player,
                        oldteam=old_team,
                        newteam=new_team,
                        cancelled=False,
                        frozen=False,
                    )
                    transactions.append(transaction)

            if transactions:
                created_transactions = (
                    await transaction_service.create_transaction_batch(transactions)
                )
            else:
                created_transactions = []

            if created_transactions and interaction.client:
                await post_trade_to_log(
                    bot=interaction.client,
                    builder=self.builder,
                    transactions=created_transactions,
                    effective_week=next_week,
                )

            self.builder.trade.status = TradeStatus.ACCEPTED

            self.accept_button.disabled = True
            self.reject_button.disabled = True

            embed = await create_trade_complete_embed(
                self.builder, len(created_transactions), next_week
            )
            await interaction.edit_original_response(embed=embed, view=self)

            await interaction.followup.send(
                f"**Trade Complete!**\n\n"
                f"All {self.builder.team_count} teams have accepted the trade.\n"
                f"**{len(created_transactions)} transactions** have been created for **Week {next_week}**.\n\n"
                f"Trade ID: `{self.builder.trade_id}`"
            )

            for team in self.builder.participating_teams:
                clear_trade_builder_by_team(team.id)

            self.stop()

        except Exception as e:
            await interaction.followup.send(
                f"Error finalizing trade: {str(e)}", ephemeral=True
            )


async def create_trade_acceptance_embed(builder: TradeBuilder) -> discord.Embed:
    """Create embed showing trade details and acceptance status."""
    embed = EmbedTemplate.create_base_embed(
        title=f"Trade Pending Acceptance - {builder.trade.get_trade_summary()}",
        description="All participating teams must accept to complete the trade.",
        color=EmbedColors.WARNING,
    )

    team_list = [
        f"- {team.abbrev} - {team.sname}" for team in builder.participating_teams
    ]
    embed.add_field(
        name=f"Participating Teams ({builder.team_count})",
        value="\n".join(team_list),
        inline=False,
    )

    if builder.trade.cross_team_moves:
        moves_text = ""
        for move in builder.trade.cross_team_moves[:10]:
            moves_text += f"- {move.description}\n"
        if len(builder.trade.cross_team_moves) > 10:
            moves_text += f"... and {len(builder.trade.cross_team_moves) - 10} more"
        embed.add_field(
            name=f"Player Exchanges ({len(builder.trade.cross_team_moves)})",
            value=moves_text,
            inline=False,
        )

    if builder.trade.supplementary_moves:
        supp_text = ""
        for move in builder.trade.supplementary_moves[:5]:
            supp_text += f"- {move.description}\n"
        if len(builder.trade.supplementary_moves) > 5:
            supp_text += f"... and {len(builder.trade.supplementary_moves) - 5} more"
        embed.add_field(
            name=f"Supplementary Moves ({len(builder.trade.supplementary_moves)})",
            value=supp_text,
            inline=False,
        )

    status_lines = []
    for team in builder.participating_teams:
        if team.id in builder.accepted_teams:
            status_lines.append(f"**{team.abbrev}** - Accepted")
        else:
            status_lines.append(f"**{team.abbrev}** - Pending")

    embed.add_field(
        name="Acceptance Status", value="\n".join(status_lines), inline=False
    )

    embed.set_footer(
        text=f"Trade ID: {builder.trade_id} | {len(builder.accepted_teams)}/{builder.team_count} teams accepted"
    )

    return embed


async def create_trade_rejection_embed(
    builder: TradeBuilder, rejecting_team: Team
) -> discord.Embed:
    """Create embed showing trade was rejected."""
    embed = EmbedTemplate.create_base_embed(
        title=f"Trade Rejected - {builder.trade.get_trade_summary()}",
        description=f"**{rejecting_team.abbrev}** has rejected the trade.\n\n"
        f"The trade has been moved back to **DRAFT** status.\n"
        f"Teams can continue negotiating using `/trade` commands.",
        color=EmbedColors.ERROR,
    )

    embed.set_footer(text=f"Trade ID: {builder.trade_id}")

    return embed


async def create_trade_complete_embed(
    builder: TradeBuilder, transaction_count: int, effective_week: int
) -> discord.Embed:
    """Create embed showing trade was completed."""
    embed = EmbedTemplate.create_base_embed(
        title=f"Trade Complete - {builder.trade.get_trade_summary()}",
        description=f"All {builder.team_count} teams have accepted the trade.\n\n"
        f"**{transaction_count} transactions** created for **Week {effective_week}**.",
        color=EmbedColors.SUCCESS,
    )

    status_lines = [
        f"**{team.abbrev}** - Accepted" for team in builder.participating_teams
    ]
    embed.add_field(name="Final Status", value="\n".join(status_lines), inline=False)

    if builder.trade.cross_team_moves:
        moves_text = ""
        for move in builder.trade.cross_team_moves[:8]:
            moves_text += f"- {move.description}\n"
        if len(builder.trade.cross_team_moves) > 8:
            moves_text += f"... and {len(builder.trade.cross_team_moves) - 8} more"
        embed.add_field(name="Player Exchanges", value=moves_text, inline=False)

    embed.set_footer(
        text=f"Trade ID: {builder.trade_id} | Effective: Week {effective_week}"
    )

    return embed


async def create_trade_embed(builder: TradeBuilder) -> discord.Embed:
    """
    Create the main trade builder embed.

    Args:
        builder: TradeBuilder instance

    Returns:
        Discord embed with current trade state
    """
    validation = await builder.validate_trade()
    if builder.is_empty:
        color = EmbedColors.SECONDARY
    else:
        color = EmbedColors.SUCCESS if validation.is_legal else EmbedColors.WARNING

    embed = EmbedTemplate.create_base_embed(
        title=f"Trade Builder - {builder.trade.get_trade_summary()}",
        description="Build your multi-team trade",
        color=color,
    )

    team_list = [
        f"- {team.abbrev} - {team.sname}" for team in builder.participating_teams
    ]
    embed.add_field(
        name=f"Participating Teams ({builder.team_count})",
        value="\n".join(team_list) if team_list else "*No teams yet*",
        inline=False,
    )

    if builder.is_empty:
        embed.add_field(
            name="Current Moves",
            value="*No moves yet. Use the `/trade` commands to build your trade.*",
            inline=False,
        )
    else:
        if builder.trade.cross_team_moves:
            moves_text = ""
            for i, move in enumerate(builder.trade.cross_team_moves[:8], 1):
                moves_text += f"{i}. {move.description}\n"

            if len(builder.trade.cross_team_moves) > 8:
                moves_text += f"... and {len(builder.trade.cross_team_moves) - 8} more"

            embed.add_field(
                name=f"Player Exchanges ({len(builder.trade.cross_team_moves)})",
                value=moves_text,
                inline=False,
            )

        if builder.trade.supplementary_moves:
            supp_text = ""
            for i, move in enumerate(builder.trade.supplementary_moves[:5], 1):
                supp_text += f"{i}. {move.description}\n"

            if len(builder.trade.supplementary_moves) > 5:
                supp_text += (
                    f"... and {len(builder.trade.supplementary_moves) - 5} more"
                )

            embed.add_field(
                name=f"Supplementary Moves ({len(builder.trade.supplementary_moves)})",
                value=supp_text,
                inline=False,
            )

    if validation.is_legal:
        status_text = "Trade appears legal"
    else:
        error_count = len(validation.all_errors)
        status_text = f"{error_count} error{'s' if error_count != 1 else ''} found\n"
        status_text += "\n".join(f"- {error}" for error in validation.all_errors)
        if validation.all_suggestions:
            status_text += "\n" + "\n".join(
                f"- {s}" for s in validation.all_suggestions
            )

    embed.add_field(name="Quick Status", value=status_text, inline=False)

    embed.add_field(
        name="Build Your Trade",
        value="- `/trade add-player` - Add player exchanges\n- `/trade supplementary` - Add internal moves\n- `/trade add-team` - Add more teams",
        inline=False,
    )

    embed.set_footer(
        text=f"Trade ID: {builder.trade_id} | Created: {datetime.fromisoformat(builder.trade.created_at).strftime('%H:%M:%S')}"
    )

    return embed