import {
  Body,
  Controller,
  Delete,
  Get,
  HttpCode,
  Param,
  ParseIntPipe,
  Patch,
  Post,
  Query,
} from '@nestjs/common';
import { ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
import { ScenarioService } from './scenario.service';
import { CreateScenarioDto } from './dto/create-scenario.dto';
import { UpdateScenarioDto } from './dto/update-scenario.dto';
import { CreateScenarioStepDto } from './dto/create-scenario-step.dto';
import { UpdateScenarioStepDto } from './dto/update-scenario-step.dto';
import { PaginationQueryDto } from './dto/pagination-query.dto';
import { ScenarioOrderBy } from './scenario.service';
import { RunsQueryDto } from './dto/runs-query.dto';

@ApiTags('scenarios')
@Controller('scenarios')
export class ScenarioController {
  constructor(private readonly scenarioService: ScenarioService) {}

  // ── Scenarios ─────────────────────────────────────────────────────────────

  @Post()
  @ApiOperation({ summary: 'Create a scenario' })
  @ApiResponse({ status: 201, description: 'Scenario created' })
  create(@Body() dto: CreateScenarioDto) {
    return this.scenarioService.create(dto);
  }

  @Get()
  @ApiOperation({ summary: 'List all scenarios (paginated)' })
  @ApiResponse({ status: 200 })
  findAll(@Query() query: PaginationQueryDto<ScenarioOrderBy>) {
    return this.scenarioService.findAll(query);
  }

  @Get(':id')
  @ApiOperation({ summary: 'Get a scenario with its steps' })
  @ApiResponse({ status: 200 })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  findOne(@Param('id', ParseIntPipe) id: number) {
    return this.scenarioService.findOne(id);
  }

  @Patch(':id')
  @ApiOperation({ summary: 'Update a scenario' })
  @ApiResponse({ status: 200 })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  update(@Param('id', ParseIntPipe) id: number, @Body() dto: UpdateScenarioDto) {
    return this.scenarioService.update(id, dto);
  }

  @Delete(':id')
  @HttpCode(204)
  @ApiOperation({ summary: 'Delete a scenario and all its steps' })
  @ApiResponse({ status: 204 })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  remove(@Param('id', ParseIntPipe) id: number) {
    return this.scenarioService.remove(id);
  }

  // ── Steps ─────────────────────────────────────────────────────────────────

  @Post(':id/steps')
  @ApiOperation({ summary: 'Add a step to a scenario' })
  @ApiResponse({ status: 201, description: 'Step created' })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  createStep(
    @Param('id', ParseIntPipe) id: number,
    @Body() dto: CreateScenarioStepDto,
  ) {
    return this.scenarioService.createStep(id, dto);
  }

  @Get(':id/steps/:stepId')
  @ApiOperation({ summary: 'Get a single step' })
  @ApiResponse({ status: 200 })
  @ApiResponse({ status: 404, description: 'Scenario or step not found' })
  findStep(
    @Param('id', ParseIntPipe) id: number,
    @Param('stepId', ParseIntPipe) stepId: number,
  ) {
    return this.scenarioService.findStep(id, stepId);
  }

  @Patch(':id/steps/:stepId')
  @ApiOperation({ summary: 'Update a step' })
  @ApiResponse({ status: 200 })
  @ApiResponse({ status: 404, description: 'Scenario or step not found' })
  updateStep(
    @Param('id', ParseIntPipe) id: number,
    @Param('stepId', ParseIntPipe) stepId: number,
    @Body() dto: UpdateScenarioStepDto,
  ) {
    return this.scenarioService.updateStep(id, stepId, dto);
  }

  @Delete(':id/steps/:stepId')
  @HttpCode(204)
  @ApiOperation({ summary: 'Delete a step' })
  @ApiResponse({ status: 204 })
  @ApiResponse({ status: 404, description: 'Scenario or step not found' })
  removeStep(
    @Param('id', ParseIntPipe) id: number,
    @Param('stepId', ParseIntPipe) stepId: number,
  ) {
    return this.scenarioService.removeStep(id, stepId);
  }

  // ── Runs ──────────────────────────────────────────────────────────────────

  @Get(':id/runs')
  @ApiOperation({ summary: 'List runs for a scenario (paginated, filterable by status)' })
  @ApiResponse({ status: 200 })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  findRuns(
    @Param('id', ParseIntPipe) id: number,
    @Query() query: RunsQueryDto,
  ) {
    return this.scenarioService.findRuns(id, query);
  }

  @Post(':id/run')
  @ApiOperation({ summary: 'Create a new run for a scenario' })
  @ApiResponse({ status: 201, description: 'Run created with step runs' })
  @ApiResponse({ status: 404, description: 'Scenario not found' })
  createRun(@Param('id', ParseIntPipe) id: number) {
    return this.scenarioService.createRun(id);
  }
}