import { BadRequestException, Body, Controller, Delete, Get, Param, ParseBoolPipe, ParseEnumPipe, ParseIntPipe, Patch, Post, Query, UseGuards, UsePipes, ValidationPipe } from "@nestjs/common";
import { LeaveRequestsService } from "../services/leave-requests.service";
import { CreateLeaveRequestsDto } from "../dtos/create-leave-requests.dto";
import { LeaveRequests } from "@prisma/client";
import { UpdateLeaveRequestsDto } from "../dtos/update-leave-requests.dto";
import { RolesAllowed } from "src/common/decorators/roles.decorators";
import { LeaveApprovalStatus, Roles as RoleEnum } from '.prisma/client';
import { ApiBearerAuth, ApiOperation, ApiResponse, ApiTags } from "@nestjs/swagger";
import { LeaveRequestEntity } from "../dtos/swagger-entities/leave-requests.entity";
import { SearchLeaveRequestsDto } from "../dtos/search-leave-requests.dto";

@ApiTags('Leave Requests')
@ApiBearerAuth('access-token')
// @UseGuards()
@Controller('leave-requests')
export class LeaveRequestController {
    constructor(private readonly leaveRequetsService: LeaveRequestsService){}

    @Post()
    @RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.EMPLOYEE, RoleEnum.HR, RoleEnum.SUPERVISOR)
    @ApiOperation({summary: 'Create leave request' })
    @ApiResponse({ status: 201, description: 'Leave request created',type: LeaveRequestEntity })
    @ApiResponse({ status: 400, description: 'Incomplete task or invalid data' })
    create(@Body() dto: CreateLeaveRequestsDto): Promise<LeaveRequests> {
        return this. leaveRequetsService.create(dto);
    }

    @Get()
    @RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.HR, RoleEnum.SUPERVISOR)
    @ApiOperation({summary: 'Find all leave request' })
    @ApiResponse({ status: 201, description: 'List of Leave requests found',type: LeaveRequestEntity, isArray: true })
    @ApiResponse({ status: 400, description: 'List of leave request not found' })
    @UsePipes(new ValidationPipe({transform: true, whitelist: true}))
    findAll(@Query() filters: SearchLeaveRequestsDto): Promise<(LeaveRequests & {daysRequested:number; cost: number})[]> {
        return this.leaveRequetsService.findAll(filters);
    }

    @Get(':id')
    @RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.EMPLOYEE, RoleEnum.HR, RoleEnum.SUPERVISOR)
    @ApiOperation({summary: 'Find leave request' })
    @ApiResponse({ status: 201, description: 'Leave request found',type: LeaveRequestEntity })
    @ApiResponse({ status: 400, description: 'Leave request not found' })
    findOne(@Param('id', ParseIntPipe) id: number): Promise<LeaveRequests> {
        return this.leaveRequetsService.findOne(id);
    }

    @Patch(':id')
    @RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.EMPLOYEE, RoleEnum.HR, RoleEnum.SUPERVISOR)
    @ApiOperation({summary: 'Update leave request' })
    @ApiResponse({ status: 201, description: 'Leave request updated',type: LeaveRequestEntity })
    @ApiResponse({ status: 400, description: 'Leave request not found' })
    update(@Param('id', ParseIntPipe) id: number,@Body() dto: UpdateLeaveRequestsDto): Promise<LeaveRequests> {
        return this.leaveRequetsService.update(id, dto);
    }

    @Delete(':id')
    @RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.EMPLOYEE, RoleEnum.HR, RoleEnum.SUPERVISOR)
    @ApiOperation({summary: 'Delete leave request' })
    @ApiResponse({ status: 201, description: 'Leave request deleted',type: LeaveRequestEntity })
    @ApiResponse({ status: 400, description: 'Leave request not found' })
    remove(@Param('id', ParseIntPipe) id: number): Promise<LeaveRequests> {
        return this.leaveRequetsService.remove(id);
    }

    @Patch(':id/approval')
    updateApproval( @Param('id', ParseIntPipe) id: number,
                    @Body('is_approved', ParseBoolPipe) isApproved: boolean): Promise<LeaveRequests> {
            const approvalStatus = isApproved ? 
                 LeaveApprovalStatus.APPROVED : LeaveApprovalStatus.DENIED;
            return this.leaveRequetsService.update(id, { approval_status: approvalStatus });
        }

    }