import { Controller, Post, Param, Body, HttpCode, HttpStatus } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse, ApiParam } from '@nestjs/swagger';
import { CallAckResponseDto } from './dto/call-response.dto';
import { CreateCallLinkDto } from './dto/create-call-link.dto';
import { CallLinkResponseDto } from './dto/call-link-response.dto';
import { CallService } from './call.service';
import { RequireRole } from '../auth/decorators/auth.decorators';
import { ApiKeyRole } from '../auth/entities/api-key.entity';
import { ENGINE_NOT_READY_409 } from '../../common/openapi/engine-status-responses';

@ApiTags('calls')
@Controller('sessions/:sessionId/calls')
export class CallController {
  constructor(private readonly callService: CallService) {}

  @Post('link')
  @RequireRole(ApiKeyRole.OPERATOR)
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Generate a shareable WhatsApp call link' })
  @ApiParam({ name: 'sessionId', description: 'Session ID' })
  @ApiResponse({ status: 200, description: 'The generated link', type: CallLinkResponseDto })
  @ApiResponse({ status: 400, description: 'Session is not started, or an invalid type / startTime' })
  @ApiResponse({ status: 403, description: 'WhatsApp generated no link for this request' })
  @ApiResponse({
    status: 503,
    description:
      'WhatsApp did not answer within the request budget. The link may or may not have been created — ' +
      'the gateway stopped waiting for a reply that never came.',
  })
  @ApiResponse({ status: 409, description: ENGINE_NOT_READY_409 })
  async createLink(
    @Param('sessionId') sessionId: string,
    @Body() dto: CreateCallLinkDto,
  ): Promise<CallLinkResponseDto> {
    const link = await this.callService.createCallLink(sessionId, dto.type, dto.startTime);
    return { link };
  }

  @Post(':callId/reject')
  @RequireRole(ApiKeyRole.OPERATOR)
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Reject a ringing incoming call' })
  @ApiParam({ name: 'sessionId', description: 'Session ID' })
  @ApiParam({ name: 'callId', description: 'Call ID from the call.received event' })
  @ApiResponse({ status: 200, description: 'Call rejected', type: CallAckResponseDto })
  @ApiResponse({ status: 400, description: 'Session is not started' })
  @ApiResponse({ status: 404, description: 'Call not found or no longer ringing' })
  @ApiResponse({
    status: 503,
    description:
      'WhatsApp did not answer within the request budget. The change may or may not have been applied — ' +
      'the gateway stopped waiting for a confirmation that never came.',
  })
  @ApiResponse({ status: 409, description: ENGINE_NOT_READY_409 })
  async reject(@Param('sessionId') sessionId: string, @Param('callId') callId: string) {
    await this.callService.rejectCall(sessionId, callId);
    return { success: true };
  }
}