from datetime import datetime
from typing import Annotated, TypeVar

from core_domain import ServiceHealth
from fastapi import APIRouter, Depends, HTTPException, Query, Request
from sqlalchemy import text
from sqlalchemy.orm import Session

from app.application.services import ToolApplicationService, build_tool_application_service
from app.bootstrap.settings import ToolServiceSettings
from app.db.session import get_db
from app.schemas.tool import (
    ApiResponse,
    DeleteData,
    McpConnectData,
    McpConnectRequestDto,
    PageRequest,
    PageResult,
    ToolBindingCreateRequest,
    ToolBindingCreateRequestDto,
    ToolBindingDeleteRequestDto,
    ToolBindingDetailRequestDto,
    ToolBindingDetailResponse,
    ToolBindingDto,
    ToolBindingListRequestDto,
    ToolBindingResponse,
    ToolBindingUpdateRequestDto,
    ToolCreateRequest,
    ToolCreateRequestDto,
    ToolCredentialCreateRequest,
    ToolCredentialCreateRequestDto,
    ToolCredentialDeleteRequestDto,
    ToolCredentialDetailRequestDto,
    ToolCredentialDto,
    ToolCredentialResponse,
    ToolCredentialRevealDto,
    ToolCredentialRevealRequestDto,
    ToolCredentialRevealResponse,
    ToolCredentialUpdateRequestDto,
    ToolDeleteRequestDto,
    ToolDetailRequestDto,
    ToolDto,
    ToolResponse,
    ToolUpdateRequestDto,
    ToolConnectionCreateRequest,
    ToolConnectionCreateRequestDto,
    ToolConnectionDeleteRequestDto,
    ToolConnectionDetailRequestDto,
    ToolConnectionDto,
    ToolConnectionListRequestDto,
    ToolConnectionResponse,
    ToolConnectionUpdateRequestDto,
)

router = APIRouter()
DbSession = Annotated[Session, Depends(get_db)]
T = TypeVar("T")


def get_tool_application_service(
    request: Request,
    db: DbSession) -> ToolApplicationService:
    settings: ToolServiceSettings = request.app.state.settings
    return build_tool_application_service(db=db, settings=settings)


ToolServiceDep = Annotated[ToolApplicationService, Depends(get_tool_application_service)]


def ok(data: T) -> ApiResponse[T]:
    return ApiResponse[T](
        data=data,
        requestId="",
        serverTime=datetime.utcnow())


@router.get("/health", response_model=ServiceHealth)
def health_check(db: DbSession) -> ServiceHealth:
    db.execute(text("SELECT 1"))
    return ServiceHealth(service="tool-service", status="ok", database="ok")


@router.post("", response_model=ToolResponse)
def create_tool_definition(
    payload: ToolCreateRequest,
    service: ToolServiceDep) -> ToolResponse:
    entity = service.create_tool_definition(payload)
    return ToolResponse.from_entity(entity)


@router.get("", response_model=list[ToolResponse])
def list_tool_definitions(
    service: ToolServiceDep) -> list[ToolResponse]:
    return [ToolResponse.from_entity(item) for item in service.list_tool_definitions()]


@router.post("/bindings", response_model=ToolBindingResponse)
def create_tool_binding(
    payload: ToolBindingCreateRequest,
    service: ToolServiceDep) -> ToolBindingResponse:
    try:
        entity = service.create_tool_binding(payload)
    except ValueError as exc:
        raise HTTPException(status_code=422, detail=str(exc)) from exc
    return ToolBindingResponse.from_entity(entity)


@router.get("/bindings", response_model=list[ToolBindingResponse])
def list_tool_bindings(
    service: ToolServiceDep,
    app_id: str | None = Query(default=None)) -> list[ToolBindingResponse]:
    return [
        ToolBindingResponse.from_entity(item)
        for item in service.list_tool_bindings(app_id=app_id)
    ]


@router.get("/bindings/{binding_id}", response_model=ToolBindingDetailResponse)
def get_tool_binding_detail(
    binding_id: str,
    service: ToolServiceDep) -> ToolBindingDetailResponse:
    result = service.get_tool_binding_detail(binding_id=binding_id)
    if result is None:
        raise HTTPException(status_code=404, detail=f"tool_binding not found: {binding_id}")

    binding, tool_connection, tool_definition = result
    return ToolBindingDetailResponse(
        binding=ToolBindingResponse.from_entity(binding),
        connection=ToolConnectionResponse.from_entity(tool_connection),
        tool_definition=ToolResponse.from_entity(tool_definition))


@router.post("/credentials", response_model=ToolCredentialResponse)
def create_tool_credential(
    payload: ToolCredentialCreateRequest,
    service: ToolServiceDep) -> ToolCredentialResponse:
    entity = service.create_tool_credential(payload)
    return ToolCredentialResponse.from_entity(entity)


@router.get("/credentials", response_model=list[ToolCredentialResponse])
def list_tool_credentials(
    service: ToolServiceDep) -> list[ToolCredentialResponse]:
    return [
        ToolCredentialResponse.from_entity(item)
        for item in service.list_tool_credentials()
    ]


@router.post("/credentials/{credential_id}/reveal", response_model=ToolCredentialRevealResponse)
def reveal_tool_credential(
    credential_id: str,
    service: ToolServiceDep) -> ToolCredentialRevealResponse:
    result = service.reveal_tool_credential(
        credential_id=credential_id)
    if result is None:
        raise HTTPException(status_code=404, detail=f"tool credential not found: {credential_id}")
    credential, secret_json = result
    return ToolCredentialRevealResponse(
        credential=ToolCredentialResponse.from_entity(credential),
        secret_json=secret_json)


@router.post("/list", response_model=ApiResponse[PageResult[ToolDto]])
def list_tools_contract(
    payload: PageRequest,
    service: ToolServiceDep) -> ApiResponse[PageResult[ToolDto]]:
    keyword = (payload.keyword or "").lower().strip()
    items = [
        item
        for item in service.list_tool_definitions()
        if not keyword
        or keyword in item.name.lower()
        or keyword in item.tool_type.lower()
        or keyword in (item.description or "").lower()
    ]
    page_items = items[payload.offset:payload.offset + payload.pageSize]
    return ok(
        PageResult[ToolDto].from_items(
            items=[ToolDto.from_entity(item) for item in page_items],
            total=len(items),
            page=payload.page,
            page_size=payload.pageSize))


@router.post("/create", response_model=ApiResponse[ToolDto])
def create_tool_contract(
    payload: ToolCreateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolDto]:
    entity = service.create_tool_definition_from_contract(payload)
    return ok(ToolDto.from_entity(entity))


@router.post("/detail", response_model=ApiResponse[ToolDto])
def get_tool_contract(
    payload: ToolDetailRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolDto]:
    entity = service.get_tool_definition_from_contract(payload)
    if entity is None:
        raise HTTPException(status_code=404, detail=f"tool not found: {payload.toolId}")
    return ok(ToolDto.from_entity(entity))


@router.post("/update", response_model=ApiResponse[ToolDto])
def update_tool_contract(
    payload: ToolUpdateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolDto]:
    entity = service.update_tool_definition_from_contract(payload)
    if entity is None:
        raise HTTPException(status_code=404, detail=f"tool not found: {payload.toolId}")
    return ok(ToolDto.from_entity(entity))


@router.post("/delete", response_model=ApiResponse[DeleteData])
def delete_tool_contract(
    payload: ToolDeleteRequestDto,
    service: ToolServiceDep) -> ApiResponse[DeleteData]:
    deleted = service.delete_tool_definition_from_contract(payload)
    return ok(DeleteData(deleted=deleted, toolId=payload.toolId))


@router.post("/connections/list", response_model=ApiResponse[PageResult[ToolConnectionDto]])
def list_tool_connections_contract(
    payload: ToolConnectionListRequestDto,
    service: ToolServiceDep) -> ApiResponse[PageResult[ToolConnectionDto]]:
    items = service.list_tool_connections(tool_id=payload.toolId)
    page_items = items[payload.offset:payload.offset + payload.pageSize]
    return ok(
        PageResult[ToolConnectionDto].from_items(
            items=[ToolConnectionDto.from_entity(item) for item in page_items],
            total=len(items),
            page=payload.page,
            page_size=payload.pageSize))


@router.post("/connections/create", response_model=ApiResponse[ToolConnectionDto])
def create_tool_connection_contract(
    payload: ToolConnectionCreateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolConnectionDto]:
    entity = service.create_tool_connection_from_contract(payload)
    return ok(ToolConnectionDto.from_entity(entity))


@router.post("/connections/detail", response_model=ApiResponse[ToolConnectionDto])
def get_tool_connection_contract(
    payload: ToolConnectionDetailRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolConnectionDto]:
    entity = service.get_tool_connection_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool connection not found: {payload.connectionId}")
    return ok(ToolConnectionDto.from_entity(entity))


@router.post("/connections/update", response_model=ApiResponse[ToolConnectionDto])
def update_tool_connection_contract(
    payload: ToolConnectionUpdateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolConnectionDto]:
    entity = service.update_tool_connection_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool connection not found: {payload.connectionId}")
    return ok(ToolConnectionDto.from_entity(entity))


@router.post("/connections/delete", response_model=ApiResponse[DeleteData])
def delete_tool_connection_contract(
    payload: ToolConnectionDeleteRequestDto,
    service: ToolServiceDep) -> ApiResponse[DeleteData]:
    connection_id = payload.connectionId
    deleted = service.delete_tool_connection(connection_id=connection_id)
    return ok(DeleteData(deleted=deleted, connectionId=connection_id))


@router.post("/mcp/connect", response_model=ApiResponse[McpConnectData])
def connect_mcp_server_contract(
    payload: McpConnectRequestDto,
    service: ToolServiceDep) -> ApiResponse[McpConnectData]:
    return ok(service.connect_mcp_server(payload))


@router.post("/bindings/list", response_model=ApiResponse[PageResult[ToolBindingDto]])
def list_tool_bindings_contract(
    payload: ToolBindingListRequestDto,
    service: ToolServiceDep) -> ApiResponse[PageResult[ToolBindingDto]]:
    items = service.list_tool_bindings(app_id=payload.appId)
    page_items = items[payload.offset:payload.offset + payload.pageSize]
    return ok(
        PageResult[ToolBindingDto].from_items(
            items=[ToolBindingDto.from_entity(item) for item in page_items],
            total=len(items),
            page=payload.page,
            page_size=payload.pageSize))


@router.post("/bindings/create", response_model=ApiResponse[ToolBindingDto])
def create_tool_binding_contract(
    payload: ToolBindingCreateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolBindingDto]:
    try:
        entity = service.create_tool_binding_from_contract(payload)
    except ValueError as exc:
        raise HTTPException(status_code=422, detail=str(exc)) from exc
    return ok(ToolBindingDto.from_entity(entity))


@router.post("/bindings/detail", response_model=ApiResponse[ToolBindingDto])
def get_tool_binding_contract(
    payload: ToolBindingDetailRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolBindingDto]:
    entity = service.get_tool_binding_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool binding not found: {payload.bindingId}")
    return ok(ToolBindingDto.from_entity(entity))


@router.post("/bindings/update", response_model=ApiResponse[ToolBindingDto])
def update_tool_binding_contract(
    payload: ToolBindingUpdateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolBindingDto]:
    entity = service.update_tool_binding_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool binding not found: {payload.bindingId}")
    return ok(ToolBindingDto.from_entity(entity))


@router.post("/bindings/delete", response_model=ApiResponse[DeleteData])
def delete_tool_binding_contract(
    payload: ToolBindingDeleteRequestDto,
    service: ToolServiceDep) -> ApiResponse[DeleteData]:
    deleted = service.delete_tool_binding(payload)
    return ok(DeleteData(deleted=deleted, bindingId=payload.bindingId))


@router.post("/credentials/list", response_model=ApiResponse[PageResult[ToolCredentialDto]])
def list_tool_credentials_contract(
    payload: PageRequest,
    service: ToolServiceDep) -> ApiResponse[PageResult[ToolCredentialDto]]:
    keyword = (payload.keyword or "").lower().strip()
    items = [
        item
        for item in service.list_tool_credentials()
        if not keyword
        or keyword in item.name.lower()
        or keyword in item.credential_type.lower()
    ]
    page_items = items[payload.offset:payload.offset + payload.pageSize]
    return ok(
        PageResult[ToolCredentialDto].from_items(
            items=[ToolCredentialDto.from_entity(item) for item in page_items],
            total=len(items),
            page=payload.page,
            page_size=payload.pageSize))


@router.post("/credentials/create", response_model=ApiResponse[ToolCredentialDto])
def create_tool_credential_contract(
    payload: ToolCredentialCreateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolCredentialDto]:
    entity = service.create_tool_credential_from_contract(payload)
    return ok(ToolCredentialDto.from_entity(entity))


@router.post("/credentials/detail", response_model=ApiResponse[ToolCredentialDto])
def get_tool_credential_contract(
    payload: ToolCredentialDetailRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolCredentialDto]:
    entity = service.get_tool_credential_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool credential not found: {payload.credentialId}")
    return ok(ToolCredentialDto.from_entity(entity))


@router.post("/credentials/update", response_model=ApiResponse[ToolCredentialDto])
def update_tool_credential_contract(
    payload: ToolCredentialUpdateRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolCredentialDto]:
    entity = service.update_tool_credential_from_contract(payload)
    if entity is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool credential not found: {payload.credentialId}")
    return ok(ToolCredentialDto.from_entity(entity))


@router.post("/credentials/delete", response_model=ApiResponse[DeleteData])
def delete_tool_credential_contract(
    payload: ToolCredentialDeleteRequestDto,
    service: ToolServiceDep) -> ApiResponse[DeleteData]:
    deleted = service.delete_tool_credential(payload)
    return ok(DeleteData(deleted=deleted, credentialId=payload.credentialId))


@router.post("/credentials/reveal", response_model=ApiResponse[ToolCredentialRevealDto])
def reveal_tool_credential_contract(
    payload: ToolCredentialRevealRequestDto,
    service: ToolServiceDep) -> ApiResponse[ToolCredentialRevealDto]:
    result = service.reveal_tool_credential_from_contract(
        credential_id=payload.credentialId)
    if result is None:
        raise HTTPException(
            status_code=404,
            detail=f"tool credential not found: {payload.credentialId}")
    return ok(result)