import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Patch,
  Body,
  Param,
  Query,
  UseGuards,
} from '@nestjs/common';
import { PolicyEngineService } from './policy-engine.service';
import { PolicyEvaluationService } from './policy-evaluation.service';
import type { EvaluationInput } from './services/master-value-resolver.service';
import { CreatePolicyDto } from './dto/create-policy.dto';
import { UpdatePolicyDto } from './dto/update-policy.dto';
import { PolicyStatus, AudienceType } from './entities/policy.enums';
import { PermissionsGuard } from '../auth/guards/permissions.guard';
import { RequirePermissions } from '../auth/decorators/permissions.decorator';

@Controller('policy-engine')
@UseGuards(PermissionsGuard)
export class PolicyEngineController {
  constructor(
    private readonly policyEngineService: PolicyEngineService,
    private readonly policyEvaluationService: PolicyEvaluationService,
  ) { }

  @Post('evaluate')
  @RequirePermissions('simulation:execute', 'recovery:evaluate')
  async evaluate(@Body() input: EvaluationInput) {
    return this.policyEvaluationService.evaluateIncident(input);
  }

  @Post('evaluate-batch')
  @RequirePermissions('simulation:execute', 'recovery:evaluate')
  async evaluateBatch(@Body() inputs: EvaluationInput[]) {
    const list = Array.isArray(inputs) ? inputs : [inputs];
    return Promise.all(
      list.map((item) => this.policyEvaluationService.evaluateIncident(item)),
    );
  }

  @Post()
  @RequirePermissions('policy_engine:create')
  async create(@Body() createPolicyDto: CreatePolicyDto) {
    return this.policyEngineService.create(createPolicyDto);
  }

  @Get()
  @RequirePermissions('policy_engine:view')
  async findAll(
    @Query('page') page: string = '1',
    @Query('limit') limit: string = '10',
    @Query('status') status?: PolicyStatus,
    @Query('audienceType') audienceType?: AudienceType,
  ) {
    return this.policyEngineService.findAll(
      Number(page),
      Number(limit),
      status,
      audienceType,
    );
  }

  @Get(':id')
  @RequirePermissions('policy_engine:view')
  async findOne(@Param('id') id: string) {
    return this.policyEngineService.findOne(id);
  }

  @Put(':id')
  @RequirePermissions('policy_engine:edit')
  async update(
    @Param('id') id: string,
    @Body() updatePolicyDto: UpdatePolicyDto,
  ) {
    return this.policyEngineService.update(id, updatePolicyDto);
  }

  @Patch(':id/status')
  @RequirePermissions('policy_engine:publish', 'policy_engine:edit')
  async updateStatus(
    @Param('id') id: string,
    @Body('status') status: PolicyStatus,
  ) {
    return this.policyEngineService.updateStatus(id, status);
  }

  @Delete(':id')
  @RequirePermissions('policy_engine:delete')
  async remove(@Param('id') id: string) {
    return this.policyEngineService.remove(id);
  }
}