import { Body, Controller, Get, Param, ParseUUIDPipe, Post, Query } from '@nestjs/common';
import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
import { CurrentUser } from '@edr/api-common';
import type { TCurrentUser } from '@tria-plc/api-common/modules/auth/types/current-user.type';

import { isSuperAdmin } from '../../../common/freight-permission.util';
import { RuleEngineApprove, RuleEngineCreate, RuleEngineView } from '../../../common/rule-engine-guards';
import { DecideRateChangeDto, SubmitRateChangeDto } from '../dto/rate-change-request.dto';
import { RateChangeStatus } from '../entities/rate-change-request.entity';
import { RateChangeRequestsService } from '../services/rate-change-requests.service';

/**
 * Edits to LIVE rates. Staff with `manage` propose (submit); only holders of
 * `approve` decide. Until a change is approved the live rate keeps its current
 * value, so pricing never moves on an unapproved edit.
 */
@ApiTags('rate-change-requests')
@Controller('rate-change-requests')
@ApiBearerAuth()
export class RateChangeRequestsController {
  constructor(private readonly service: RateChangeRequestsService) {}

  @Post()
  @RuleEngineCreate('rates')
  @ApiOperation({ summary: 'Propose a change to a LIVE rate' })
  submit(@Body() dto: SubmitRateChangeDto, @CurrentUser() user: TCurrentUser) {
    return this.service.submit(dto, user?.id);
  }

  @Get()
  @RuleEngineView('rates')
  @ApiOperation({ summary: 'List rate change requests, optionally by status' })
  list(@Query('status') status?: RateChangeStatus) {
    return this.service.list(status);
  }

  @Post(':id/approve')
  @RuleEngineApprove('rates')
  @ApiOperation({ summary: 'Approve a rate change and put it into effect' })
  approve(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: DecideRateChangeDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.service.approve(id, user?.id, dto.decisionNote, isSuperAdmin(user));
  }

  @Post(':id/reject')
  @RuleEngineApprove('rates')
  @ApiOperation({ summary: 'Reject a rate change — the rate keeps its current value' })
  reject(
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: DecideRateChangeDto,
    @CurrentUser() user: TCurrentUser,
  ) {
    return this.service.reject(id, user?.id, dto.decisionNote);
  }
}