import {
  Body,
  Controller,
  Delete,
  Get,
  Param,
  ParseUUIDPipe,
  Post,
  Put,
  Query,
  UseGuards,
} from '@nestjs/common';
import {
  IsArray,
  IsDateString,
  IsEnum,
  IsInt,
  IsNumber,
  IsOptional,
  IsString,
  IsUUID,
  Min,
  ValidateNested,
} from 'class-validator';
import { Type, Transform } from 'class-transformer';
import { PurchaseOrderStatus, RobotUsageType } from '@prisma/client';
import { JwtAuthGuard } from '@modules/organization/auth/guards/jwt-auth.guard';
import { PermissionsGuard } from '@modules/organization/auth/guards/permissions.guard';
import { RequirePermissions } from '@common/decorators/permissions.decorator';
import { CurrentUser } from '@common/decorators/current-user.decorator';
import type { CurrentUserPayload } from '@common/decorators/current-user.decorator';
import { NIL_ORG_ID } from '@common/constants/nil-uuid';
import { Auditable, Sensitive, Financial } from '@core/observability/audit/decorators/auditable.decorator';
import { PurchaseOrderService } from './purchase-order.service';

class CreatePurchaseOrderLineDto {
  @IsInt() @Min(1) lineNo!: number;
  @IsUUID() skuId!: string;
  @IsInt() @Min(1) quantity!: number;
  @IsNumber() unitPrice!: number;
  @IsString() currencyCode!: string;
  @IsOptional() @IsEnum(RobotUsageType) defaultUsageType?: RobotUsageType;
  @IsOptional() @IsString() placeholderPattern?: string;
  @IsOptional() @IsDateString() expectedAt?: string;
}

class CreatePurchaseOrderDto {
  @IsString() poNo!: string;
  @IsUUID() supplierId!: string;
  @IsString() currencyCode!: string;
  @IsDateString() orderedAt!: string;
  @IsOptional() @IsDateString() expectedAt?: string;
  @IsOptional() @IsString() notes?: string;
  @IsArray() @ValidateNested({ each: true }) @Type(() => CreatePurchaseOrderLineDto)
  lines!: CreatePurchaseOrderLineDto[];
}

class UpdatePurchaseOrderDto {
  @IsOptional() @IsEnum(PurchaseOrderStatus) status?: PurchaseOrderStatus;
  @IsOptional() @IsDateString() expectedAt?: string;
  @IsOptional() @IsDateString() closedAt?: string;
  @IsOptional() @IsString() notes?: string;
  @IsOptional() @IsString() sapPoNo?: string;
}

class QueryPurchaseOrderDto {
  @IsOptional() @IsString() search?: string;
  @IsOptional() @IsEnum(PurchaseOrderStatus) status?: PurchaseOrderStatus;
  @IsOptional() @IsUUID() supplierId?: string;
  @IsOptional() @Transform(({ value }) => value === 'true') includeDeleted?: boolean;
  @IsOptional() @IsInt() @Type(() => Number) @Min(1) page?: number;
  @IsOptional() @IsInt() @Type(() => Number) @Min(1) limit?: number;
}

@Controller('robot-manager/purchase-orders')
@UseGuards(JwtAuthGuard, PermissionsGuard)
export class PurchaseOrderController {
  constructor(private readonly service: PurchaseOrderService) {}

  @Get()
  @RequirePermissions('robot-manager:read')
  list(@Query() q: QueryPurchaseOrderDto) {
    return this.service.findAll(q);
  }

  @Get(':id')
  @RequirePermissions('robot-manager:read')
  findOne(@Param('id', new ParseUUIDPipe()) id: string) {
    return this.service.findOne(id);
  }

  @Post()
  @Auditable()
  @Financial()
  @RequirePermissions('robot-manager:create')
  async create(@Body() dto: CreatePurchaseOrderDto, @CurrentUser() user: CurrentUserPayload) {
    return this.service.create(dto, user.userId, NIL_ORG_ID);
  }

  @Put(':id')
  @Auditable()
  @Financial()
  @RequirePermissions('robot-manager:update')
  update(
    @Param('id', new ParseUUIDPipe()) id: string,
    @Body() dto: UpdatePurchaseOrderDto,
    @CurrentUser() user: CurrentUserPayload,
  ) {
    return this.service.update(id, dto, user.userId);
  }

  @Delete(':id')
  @Auditable()
  @Sensitive()
  @RequirePermissions('robot-manager:delete')
  remove(@Param('id', new ParseUUIDPipe()) id: string, @CurrentUser() user: CurrentUserPayload) {
    return this.service.softDelete(id, user.userId);
  }
}