from typing import List, Optional
from fastapi import APIRouter, HTTPException, Query, status
from app.api.websocket import manager
from app.game import game_engine
from app.models import (
    AiStepResponse,
    ApiResponse,
    AvailableMovesResponse,
    BattleRequest,
    BattleResult,
    BoardState,
    BotMemoryResponse,
    BotRadarResponse,
    GameConclusion,
    MoveCheckResult,
    MoveRequest,
    MoveResponse,
    Party,
    PartyDefeatResult,
    PartyDirectForm,
    PartyInvite,
    PartyInviteCreate,
    PartyInviteResponse,
    Player,
    PlayerCreate,
    TurnInfo,
)

router = APIRouter()


@router.get("/health", response_model=ApiResponse, tags=["System"])
async def health_check():
    return ApiResponse(
        success=True,
        message="botWebWars backend service is healthy",
        data={"service": "FastAPI", "status": "running"},
    )


@router.get(
    "/game/conclusion",
    response_model=GameConclusion,
    summary="Get the game conclusion state and final rankings when 1 party remains with all bots",
    tags=["System"],
)
async def get_game_conclusion():
    return await game_engine.get_game_conclusion()


@router.get("/board", response_model=BoardState, tags=["Board"])
async def get_board():
    return await game_engine.get_board_state()


@router.post(
    "/reset",
    response_model=ApiResponse,
    summary="Reset game board, removing all players, parties, and turn history",
    tags=["Board"],
)
async def reset_board():
    await game_engine.reset()
    board_state = await game_engine.get_board_state()
    await manager.broadcast({
        "event": "board_reset",
        "board": board_state.model_dump(),
    })
    return ApiResponse(
        success=True,
        message="Game board has been successfully reset",
    )


# ==========================================
# Player Endpoints
# ==========================================

@router.post(
    "/players",
    response_model=Player,
    status_code=status.HTTP_201_CREATED,
    summary="Register a new player/bot avatar on the 64x64 grid",
    tags=["Players"],
)
async def register_player(player_in: PlayerCreate):
    player = await game_engine.register_player(player_in)
    board_state = await game_engine.get_board_state()
    await manager.broadcast({
        "event": "player_registered",
        "player": player.model_dump(),
        "total_players": len(board_state.players),
        "turn": board_state.turn.model_dump(),
    })
    return player


@router.get(
    "/players",
    response_model=List[Player],
    summary="List all registered players/bots on the board",
    tags=["Players"],
)
async def list_players():
    return await game_engine.get_all_players()


@router.get(
    "/players/{player_id}",
    response_model=Player,
    summary="Get details of a specific player/bot",
    tags=["Players"],
)
async def get_player(player_id: str):
    player = await game_engine.get_player(player_id)
    if not player:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    return player


@router.delete(
    "/players/{player_id}",
    response_model=ApiResponse,
    summary="Remove a player/bot from the board",
    tags=["Players"],
)
async def remove_player(player_id: str):
    removed = await game_engine.remove_player(player_id)
    if not removed:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    board_state = await game_engine.get_board_state()
    await manager.broadcast({
        "event": "player_removed",
        "player_id": player_id,
        "total_players": len(board_state.players),
        "turn": board_state.turn.model_dump(),
    })
    return ApiResponse(
        success=True,
        message=f"Player '{player_id}' has been removed",
    )


# ==========================================
# Bot Memory & Radar Awareness Endpoints
# ==========================================

@router.get(
    "/players/{player_id}/memory",
    response_model=BotMemoryResponse,
    summary="Get bot memory: coordinates visited and whether a specific location has been visited before",
    tags=["Bot AI & Awareness"],
)
async def get_bot_memory(
    player_id: str,
    check_x: Optional[int] = Query(None, description="Optional X coordinate to check"),
    check_y: Optional[int] = Query(None, description="Optional Y coordinate to check"),
):
    try:
        return await game_engine.get_bot_memory(player_id, check_x, check_y)
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )


@router.get(
    "/players/{player_id}/radar",
    response_model=BotRadarResponse,
    summary="Scan radar for other bots/parties, calculating distance, ally/enemy status, recruit/battle actions",
    tags=["Bot AI & Awareness"],
)
async def get_bot_radar(player_id: str):
    try:
        return await game_engine.get_bot_radar(player_id)
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )


# ==========================================
# Party & Battle Endpoints
# ==========================================

@router.get(
    "/parties",
    response_model=List[Party],
    summary="List all active parties and their members",
    tags=["Parties"],
)
async def list_parties():
    return await game_engine.get_all_parties()


@router.get(
    "/parties/{party_id}",
    response_model=Party,
    summary="Get details of a specific party",
    tags=["Parties"],
)
async def get_party(party_id: str):
    party = await game_engine.get_party(party_id)
    if not party:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Party '{party_id}' not found",
        )
    return party


@router.post(
    "/parties",
    response_model=Party,
    status_code=status.HTTP_201_CREATED,
    summary="Directly form a party with adjacent linked members and an agreed leader",
    tags=["Parties"],
)
async def form_party(form_req: PartyDirectForm):
    try:
        party = await game_engine.form_party(
            member_ids=form_req.member_ids,
            leader_id=form_req.leader_id,
            name=form_req.name,
        )
        board_state = await game_engine.get_board_state()

        await manager.broadcast({
            "event": "party_formed",
            "party": party.model_dump(),
            "players": [p.model_dump() for p in board_state.players],
            "turn": board_state.turn.model_dump(),
        })

        if board_state.conclusion and board_state.conclusion.concluded:
            await manager.broadcast({
                "event": "game_concluded",
                "conclusion": board_state.conclusion.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        return party
    except KeyError as e:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


@router.post(
    "/parties/invite",
    response_model=PartyInvite,
    summary="Invite an adjacent bot to join/form a party with an agreed leader",
    tags=["Parties"],
)
async def invite_to_party(invite_req: PartyInviteCreate):
    try:
        invite = await game_engine.invite_to_party(
            inviter_id=invite_req.inviter_id,
            invitee_id=invite_req.invitee_id,
            proposed_leader_id=invite_req.proposed_leader_id,
            party_name=invite_req.party_name,
        )
        return invite
    except KeyError as e:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


@router.post(
    "/parties/invites/{invite_id}/respond",
    response_model=Optional[Party],
    summary="Accept or reject a party invitation",
    tags=["Parties"],
)
async def respond_to_invite(invite_id: str, response: PartyInviteResponse):
    try:
        party = await game_engine.respond_to_invite(invite_id, response.accept)
        board_state = await game_engine.get_board_state()

        if party:
            await manager.broadcast({
                "event": "party_formed",
                "party": party.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "turn": board_state.turn.model_dump(),
            })
            if board_state.conclusion and board_state.conclusion.concluded:
                await manager.broadcast({
                    "event": "game_concluded",
                    "conclusion": board_state.conclusion.model_dump(),
                    "players": [p.model_dump() for p in board_state.players],
                    "parties": [p.model_dump() for p in board_state.parties],
                    "turn": board_state.turn.model_dump(),
                })
        return party
    except KeyError as e:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


@router.post(
    "/parties/{party_id}/defeat",
    response_model=PartyDefeatResult,
    summary="Trigger defeat for a party: leader killed, respawns, score -1, remainder assigns new leader",
    tags=["Parties"],
)
async def defeat_party(party_id: str):
    try:
        result = await game_engine.defeat_party(party_id)
        board_state = await game_engine.get_board_state()

        await manager.broadcast({
            "event": "party_defeated",
            "defeat_details": result.model_dump(),
            "players": [p.model_dump() for p in board_state.players],
            "parties": [p.model_dump() for p in board_state.parties],
            "turn": board_state.turn.model_dump(),
        })

        if board_state.conclusion and board_state.conclusion.concluded:
            await manager.broadcast({
                "event": "game_concluded",
                "conclusion": board_state.conclusion.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        return result
    except KeyError as e:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e))


@router.post(
    "/battles/fight",
    response_model=BattleResult,
    summary="Initiate a 3-bout D20 battle between two adjacent parties/bots",
    tags=["Battles"],
)
async def fight_battle(battle_req: BattleRequest):
    try:
        result = await game_engine.battle(battle_req.challenger_id, battle_req.defender_id)
        board_state = await game_engine.get_board_state()

        await manager.broadcast({
            "event": "battle_resolved",
            "battle": result.model_dump(),
            "players": [p.model_dump() for p in board_state.players],
            "parties": [p.model_dump() for p in board_state.parties],
            "turn": board_state.turn.model_dump(),
        })

        if board_state.conclusion and board_state.conclusion.concluded:
            await manager.broadcast({
                "event": "game_concluded",
                "conclusion": board_state.conclusion.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        return result
    except KeyError as e:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))


# ==========================================
# Movement & Turn Endpoints
# ==========================================

@router.get(
    "/players/{player_id}/available-moves",
    response_model=AvailableMovesResponse,
    summary="Check availability of all 8 movement directions for a bot or their party",
    tags=["Movement"],
)
async def get_available_moves(player_id: str):
    try:
        return await game_engine.get_available_moves(player_id)
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )


@router.get(
    "/players/{player_id}/check-move",
    response_model=MoveCheckResult,
    summary="Check if a specific direction is available for movement",
    tags=["Movement"],
)
async def check_single_move(
    player_id: str,
    direction: str = Query(
        ...,
        description="Direction to check: UP, DOWN, LEFT, RIGHT, UP_LEFT, UP_RIGHT, DOWN_LEFT, DOWN_RIGHT",
    ),
):
    try:
        return await game_engine.check_single_move(player_id, direction)
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e),
        )


@router.post(
    "/players/{player_id}/move",
    response_model=MoveResponse,
    summary="Move player (or entire party if leader) in a cardinal or diagonal direction during turn",
    tags=["Movement"],
)
async def move_player(player_id: str, move_req: MoveRequest):
    try:
        dx, dy, dir_name = move_req.get_delta()
        result = await game_engine.move_player(player_id, dx, dy, dir_name)

        board_state = await game_engine.get_board_state()
        await manager.broadcast({
            "event": "player_moved",
            "player": result.player.model_dump(),
            "direction": result.direction,
            "party_moved": result.party_moved,
            "affected_players": [p.model_dump() for p in result.affected_players],
            "previous_position": result.previous_position,
            "new_position": result.new_position,
            "players": [p.model_dump() for p in board_state.players],
            "turn": result.turn.model_dump(),
        })

        if result.party_formed_triggered and result.formed_party:
            await manager.broadcast({
                "event": "party_formed",
                "party": result.formed_party.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "turn": board_state.turn.model_dump(),
            })

        if result.battle_triggered and result.battle_result:
            await manager.broadcast({
                "event": "battle_resolved",
                "battle": result.battle_result.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        if result.game_concluded or (board_state.conclusion and board_state.conclusion.concluded):
            conclusion_obj = result.game_concluded or board_state.conclusion
            await manager.broadcast({
                "event": "game_concluded",
                "conclusion": conclusion_obj.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        return result
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    except PermissionError as e:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=str(e),
        )
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e),
        )


@router.post(
    "/players/{player_id}/ai-step",
    response_model=AiStepResponse,
    summary="Autonomous AI turn: unpartied bots seek & form parties (stronger bot is leader); parties hunt & defeat all other parties",
    tags=["Movement"],
)
async def step_bot_ai(player_id: str):
    try:
        result = await game_engine.step_bot_ai(player_id)
        board_state = await game_engine.get_board_state()

        if result.formed_party:
            await manager.broadcast({
                "event": "party_formed",
                "party": result.formed_party.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "turn": board_state.turn.model_dump(),
            })
        elif result.battle_result:
            await manager.broadcast({
                "event": "battle_resolved",
                "battle": result.battle_result.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })
        elif result.move_result:
            await manager.broadcast({
                "event": "player_moved",
                "player": result.move_result.player.model_dump(),
                "direction": result.move_result.direction,
                "party_moved": result.move_result.party_moved,
                "affected_players": [p.model_dump() for p in result.move_result.affected_players],
                "previous_position": result.move_result.previous_position,
                "new_position": result.move_result.new_position,
                "players": [p.model_dump() for p in board_state.players],
                "turn": result.move_result.turn.model_dump(),
            })
            if result.move_result.party_formed_triggered and result.move_result.formed_party:
                await manager.broadcast({
                    "event": "party_formed",
                    "party": result.move_result.formed_party.model_dump(),
                    "players": [p.model_dump() for p in board_state.players],
                    "turn": board_state.turn.model_dump(),
                })
            if result.move_result.battle_triggered and result.move_result.battle_result:
                await manager.broadcast({
                    "event": "battle_resolved",
                    "battle": result.move_result.battle_result.model_dump(),
                    "players": [p.model_dump() for p in board_state.players],
                    "parties": [p.model_dump() for p in board_state.parties],
                    "turn": board_state.turn.model_dump(),
                })
        else:
            await manager.broadcast({
                "event": "turn_passed",
                "passed_by": player_id,
                "turn": result.turn.model_dump(),
            })

        if result.game_concluded or (board_state.conclusion and board_state.conclusion.concluded):
            conclusion_obj = result.game_concluded or board_state.conclusion
            await manager.broadcast({
                "event": "game_concluded",
                "conclusion": conclusion_obj.model_dump(),
                "players": [p.model_dump() for p in board_state.players],
                "parties": [p.model_dump() for p in board_state.parties],
                "turn": board_state.turn.model_dump(),
            })

        return result
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    except PermissionError as e:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=str(e),
        )
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e),
        )


@router.post(
    "/players/{player_id}/pass",
    response_model=TurnInfo,
    summary="Pass the current turn to the next player",
    tags=["Movement"],
)
async def pass_turn(player_id: str):
    try:
        next_turn = await game_engine.pass_turn(player_id)
        await manager.broadcast({
            "event": "turn_passed",
            "passed_by": player_id,
            "turn": next_turn.model_dump(),
        })
        return next_turn
    except KeyError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Player '{player_id}' not found",
        )
    except PermissionError as e:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=str(e),
        )


@router.get(
    "/turn",
    response_model=TurnInfo,
    summary="Get current turn details, round number, active player, and turn order",
    tags=["Movement"],
)
async def get_turn():
    board_state = await game_engine.get_board_state()
    return board_state.turn


@router.post(
    "/game/start",
    response_model=TurnInfo,
    summary="Start the game, activating turns and permitting bot moves",
    tags=["Game"],
)
async def start_game():
    try:
        turn_info = await game_engine.start_game()
        board_state = await game_engine.get_board_state()
        await manager.broadcast({
            "event": "game_started",
            "turn": turn_info.model_dump(),
            "board": board_state.model_dump(),
        })
        return turn_info
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e),
        )