import {
  Body, Controller, Delete, Get, HttpCode, HttpStatus,
  Param, ParseUUIDPipe, Patch, Post, Query,
} from '@nestjs/common';
import { RuleEngineCreate, RuleEngineDelete, RuleEngineUpdate, RuleEngineView } from '../../../common/rule-engine-guards';
import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
import { CreateApprovalRuleDto } from '../dto/create-approval-rule.dto';
import { ListApprovalRulesQueryDto } from '../dto/list-rule-engine-query.dto';
import { MoveOrderDto } from '../dto/move-order.dto';
import { ReorderItemsDto } from '../dto/reorder-items.dto';
import { UpdateApprovalRuleDto } from '../dto/update-approval-rule.dto';
import { ApprovalRulesService } from '../services/approval-rules.service';

@ApiTags('approval-rules')
@Controller('approval-rules')
@ApiBearerAuth()
export class ApprovalRulesController {
  constructor(private readonly service: ApprovalRulesService) {}

  @Get()
  @RuleEngineView('approval-rules')
  @ApiOperation({ summary: 'List approval rules' })
  findAll(@Query() query: ListApprovalRulesQueryDto) {
    return this.service.findAll(query);
  }

  @Get('chain')
  @RuleEngineView('approval-rules')
  @ApiOperation({ summary: 'Get approval chain for cargo routing flag' })
  findChain(@Query('requiresDirectorApproval') flag: string) {
    return this.service.findChain(flag === 'true');
  }

  @Get('position-types')
  @RuleEngineView('approval-rules')
  @ApiOperation({
    summary: 'IAM position types to choose from when building an approval chain',
  })
  listPositionTypes() {
    return this.service.listPositionTypes();
  }

  @Post('reorder')
  @RuleEngineUpdate('approval-rules')
  @HttpCode(HttpStatus.NO_CONTENT)
  @ApiOperation({ summary: 'Bulk reorder approval steps within a chain' })
  reorder(@Body() dto: ReorderItemsDto) {
    return this.service.reorder(dto);
  }

  @Post(':id/move-order')
  @RuleEngineUpdate('approval-rules')
  @HttpCode(HttpStatus.NO_CONTENT)
  @ApiOperation({ summary: 'Move an approval step up or down within its chain' })
  moveOrder(@Param('id', ParseUUIDPipe) id: string, @Body() dto: MoveOrderDto) {
    return this.service.moveOrder(id, dto.direction);
  }

  @Get(':id')
  @RuleEngineView('approval-rules')
  @ApiOperation({ summary: 'Get an approval rule by ID' })
  findOne(@Param('id', ParseUUIDPipe) id: string) {
    return this.service.findById(id);
  }

  @Post()
  @RuleEngineCreate('approval-rules')
  @ApiOperation({ summary: 'Create an approval rule step' })
  create(@Body() dto: CreateApprovalRuleDto) {
    return this.service.create(dto);
  }

  @Patch(':id')
  @RuleEngineUpdate('approval-rules')
  @ApiOperation({ summary: 'Update an approval rule' })
  update(@Param('id', ParseUUIDPipe) id: string, @Body() dto: UpdateApprovalRuleDto) {
    return this.service.update(id, dto);
  }

  @Delete(':id')
  @RuleEngineDelete('approval-rules')
  @HttpCode(HttpStatus.NO_CONTENT)
  @ApiOperation({ summary: 'Soft-delete an approval rule' })
  remove(@Param('id', ParseUUIDPipe) id: string) {
    return this.service.remove(id);
  }
}
