import {
  BadRequestException,
  Body,
  Controller,
  Delete,
  Get,
  Param,
  Patch,
  Post,
  Query,
  Res,
  StreamableFile,
  UploadedFile,
  UseGuards,
  UseInterceptors,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { memoryStorage } from 'multer';
import type { Response } from 'express';
import ExcelJS from 'exceljs';
import { JwtAuthGuard } from '../auth/jwt-auth.guard';
import { RolesGuard } from '../auth/roles.guard';
import { Roles } from '../auth/roles.decorator';
import { CurrentUser } from '../auth/current-user.decorator';
import type { Actor } from '../common/record-scope';
import { OrgModuleGuard } from '../billing/org-module.guard';
import { RequireOrgModule } from '../billing/org-module.decorator';
import { brand } from '@mento/shared';
import {
  AssignLeadsDto,
  AutoAssignLeadsDto,
  BulkLeadStageDto,
  ConvertLeadDto,
  CreateLeadDto,
  CreateLeadStageDto,
  ImportLeadsDto,
  LeadCallLogDto,
  LeadFollowUpDto,
  LeadNoteDto,
  LeadSmsDto,
  MoveLeadDto,
  ReorderLeadStagesDto,
  UpdateLeadDto,
  UpdateLeadStageDto,
} from './dto';
import { LeadStagesService } from './lead-stages.service';
import { LeadsImportService } from './leads-import.service';
import { LeadsService } from './leads.service';

@Controller('leads')
@UseGuards(JwtAuthGuard, OrgModuleGuard)
@RequireOrgModule('leads')
export class LeadsController {
  constructor(
    private readonly leads: LeadsService,
    private readonly stages: LeadStagesService,
    private readonly imports: LeadsImportService,
  ) {}

  @Get('stats')
  stats(@CurrentUser() user: Actor) {
    return this.leads.stats(user);
  }

  @Get('board')
  board(@CurrentUser() user: Actor) {
    return this.leads.board(user);
  }

  @Get('stages')
  listStages(@CurrentUser() user: Actor) {
    return this.stages.list(user.organizationId);
  }

  @Post('stages')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  createStage(@CurrentUser() user: Actor, @Body() dto: CreateLeadStageDto) {
    return this.stages.create(user.organizationId, dto);
  }

  @Patch('stages/reorder')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  reorderStages(@CurrentUser() user: Actor, @Body() dto: ReorderLeadStagesDto) {
    return this.stages.reorder(user.organizationId, dto.stageIds);
  }

  @Patch('stages/:id')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  updateStage(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: UpdateLeadStageDto,
  ) {
    return this.stages.update(user.organizationId, id, dto);
  }

  @Delete('stages/:id')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  async removeStage(@CurrentUser() user: Actor, @Param('id') id: string) {
    try {
      await this.stages.remove(user.organizationId, id);
      return { ok: true };
    } catch (e) {
      throw new BadRequestException(
        e instanceof Error ? e.message : 'حذف مرحله ناموفق بود',
      );
    }
  }

  @Get('duplicate-check')
  checkDuplicate(
    @CurrentUser() user: Actor,
    @Query('mobile') mobile: string,
  ) {
    return this.leads.checkDuplicate(user, mobile ?? '');
  }

  @Get('imports/:id')
  getImport(@CurrentUser() user: Actor, @Param('id') id: string) {
    return this.imports.getJob(user.organizationId, id);
  }

  @Post('import')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  importRows(@CurrentUser() user: Actor, @Body() dto: ImportLeadsDto) {
    if (!dto.rows?.length) {
      throw new BadRequestException('ردیفی برای ایمپورت نیست');
    }
    return this.imports.enqueue(
      user.organizationId,
      user.userId,
      dto.rows,
      dto.fileName,
    );
  }

  @Post('import/preview')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  @UseInterceptors(
    FileInterceptor('file', {
      storage: memoryStorage(),
      limits: { fileSize: 15_000_000 },
    }),
  )
  importPreview(@UploadedFile() file?: Express.Multer.File) {
    if (!file?.buffer?.length) {
      throw new BadRequestException('فایل ارسال نشده');
    }
    return this.imports.preview(file);
  }

  @Post('import/file')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  @UseInterceptors(
    FileInterceptor('file', {
      storage: memoryStorage(),
      limits: { fileSize: 15_000_000 },
    }),
  )
  async importFile(
    @CurrentUser() user: Actor,
    @UploadedFile() file?: Express.Multer.File,
    @Body('mapping') mapping?: string,
  ) {
    if (!file?.buffer?.length) {
      throw new BadRequestException('فایل ارسال نشده');
    }
    const rows = await this.imports.rowsFromFile(file, mapping);
    if (!rows.length) {
      throw new BadRequestException('ردیفی برای ایمپورت نیست');
    }
    return this.imports.enqueue(
      user.organizationId,
      user.userId,
      rows,
      file.originalname,
    );
  }

  @Get('export')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  async export(
    @CurrentUser() user: Actor,
    @Res({ passthrough: true }) res: Response,
  ) {
    const data = await this.leads.list(user, { page: 1, limit: 5000 });
    const wb = new ExcelJS.Workbook();
    const sheet = wb.addWorksheet('leads');
    sheet.addRow([
      'نام',
      'موبایل',
      'مالک',
      'شهر',
      'منطقه',
      'صنف',
      'وضعیت',
      'کارشناس',
      'منبع',
      'پیگیری بعدی',
      'آخرین تماس',
    ]);
    for (const l of data.items) {
      sheet.addRow([
        l.title,
        l.mobile,
        l.contactName,
        l.city,
        l.region,
        l.trade,
        l.stageName,
        l.assigneeName,
        l.source,
        l.nextFollowUpAt,
        l.lastContactAt,
      ]);
    }
    const buffer = Buffer.from(await wb.xlsx.writeBuffer());
    res.set({
      'Content-Type':
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
      'Content-Disposition': `attachment; filename="${brand.filePrefix}-leads.xlsx"`,
    });
    return new StreamableFile(buffer);
  }

  @Get()
  list(
    @CurrentUser() user: Actor,
    @Query('q') q?: string,
    @Query('page') page?: string,
    @Query('limit') limit?: string,
    @Query('stageId') stageId?: string,
    @Query('assigneeId') assigneeId?: string,
    @Query('city') city?: string,
    @Query('trade') trade?: string,
    @Query('source') source?: string,
    @Query('unassigned') unassigned?: string,
    @Query('archived') archived?: string,
    @Query('sort') sort?: string,
  ) {
    return this.leads.list(user, {
      q,
      page: page ? Number(page) : 1,
      limit: limit ? Number(limit) : 20,
      stageId,
      assigneeId,
      city,
      trade,
      source,
      unassigned: unassigned === '1' || unassigned === 'true',
      archived: archived === '1' || archived === 'true',
      sort,
    });
  }

  @Post()
  create(@CurrentUser() user: Actor, @Body() dto: CreateLeadDto) {
    return this.leads.create(user, dto);
  }

  @Post('assign')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  assign(@CurrentUser() user: Actor, @Body() dto: AssignLeadsDto) {
    return this.leads
      .assign(user, dto.leadIds, dto.assigneeId)
      .then((count) => ({ count }));
  }

  @Post('bulk-stage')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  bulkStage(@CurrentUser() user: Actor, @Body() dto: BulkLeadStageDto) {
    return this.leads
      .bulkStage(user, dto.leadIds, dto.stageId)
      .then((count) => ({ count }));
  }

  @Post('auto-assign')
  @UseGuards(RolesGuard)
  @Roles('owner', 'admin')
  autoAssign(@CurrentUser() user: Actor, @Body() dto: AutoAssignLeadsDto) {
    return this.leads.autoAssign(user, dto);
  }

  @Post('archive')
  archive(@CurrentUser() user: Actor, @Body() body: { leadIds: string[] }) {
    return this.leads
      .archive(user, body.leadIds ?? [])
      .then((count) => ({ count }));
  }

  @Get(':id')
  get(@CurrentUser() user: Actor, @Param('id') id: string) {
    return this.leads.get(user, id);
  }

  @Get(':id/logo')
  async logo(@CurrentUser() user: Actor, @Param('id') id: string) {
    const file = await this.leads.openLogo(user, id);
    return new StreamableFile(file.stream, { type: file.mimeType });
  }

  @Post(':id/logo')
  @UseInterceptors(
    FileInterceptor('file', {
      storage: memoryStorage(),
      limits: { fileSize: 2 * 1024 * 1024 },
    }),
  )
  uploadLogo(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @UploadedFile() file: Express.Multer.File,
  ) {
    return this.leads.saveLogo(user, id, file);
  }

  @Delete(':id/logo')
  removeLogo(@CurrentUser() user: Actor, @Param('id') id: string) {
    return this.leads.removeLogo(user, id);
  }

  @Patch(':id')
  update(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: UpdateLeadDto,
  ) {
    return this.leads.update(user, id, dto as unknown as Record<string, unknown>);
  }

  @Patch(':id/move')
  move(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: MoveLeadDto,
  ) {
    return this.leads.move(user, id, dto.stageId, dto.position);
  }

  @Post(':id/sms')
  sms(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: LeadSmsDto,
  ) {
    return this.leads.sendSms(user, id, dto.text);
  }

  @Post(':id/call')
  logCall(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: LeadCallLogDto,
  ) {
    return this.leads.logCall(user, id, dto);
  }

  @Post(':id/notes')
  addNote(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: LeadNoteDto,
  ) {
    return this.leads.addNote(user, id, dto.body);
  }

  @Post(':id/follow-up')
  followUp(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: LeadFollowUpDto,
  ) {
    return this.leads.setFollowUp(user, id, dto.nextFollowUpAt, dto.body);
  }

  @Post(':id/convert')
  convert(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: ConvertLeadDto,
  ) {
    return this.leads.convert(user, id, dto);
  }
}