import { Body, Controller, Get, Param, Patch, Post, Query, StreamableFile, UploadedFile, UseGuards, UseInterceptors } from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { memoryStorage } from 'multer';
import { JwtAuthGuard } from '../auth/jwt-auth.guard';
import { CurrentUser } from '../auth/current-user.decorator';
import { OrgModuleGuard } from '../billing/org-module.guard';
import { RequireOrgModule } from '../billing/org-module.decorator';
import { TreasuryAccessGuard } from './treasury-access.guard';
import type { Actor } from '../common/record-scope';
import { TreasuryOpsService } from './treasury-ops.service';
import { TreasuryReceivablesService } from './treasury-receivables.service';
import { TreasuryService } from './treasury.service';

@Controller('treasury')
@UseGuards(JwtAuthGuard, OrgModuleGuard, TreasuryAccessGuard)
@RequireOrgModule('treasury')
export class TreasuryController {
  constructor(
    private readonly treasury: TreasuryService,
    private readonly receivables: TreasuryReceivablesService,
    private readonly ops: TreasuryOpsService,
  ) {}

  @Get('dashboard')
  dashboard(
    @CurrentUser() user: Actor,
    @Query('from') from?: string,
    @Query('to') to?: string,
  ) {
    return this.treasury.dashboard(user, { from, to });
  }

  @Get('categories')
  categories(@CurrentUser() user: Actor, @Query('kind') kind?: string) {
    return this.treasury.listCategories(user, kind);
  }

  @Post('categories')
  createCategory(
    @CurrentUser() user: Actor,
    @Body() body: { name: string; kind: 'income' | 'expense' },
  ) {
    return this.treasury.createCategory(user, body);
  }

  @Get('accounts')
  accounts(
    @CurrentUser() user: Actor,
    @Query('from') from?: string,
    @Query('to') to?: string,
  ) {
    return this.treasury.listAccounts(user, { from, to });
  }

  @Post('accounts')
  createAccount(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryService['createAccount']>[1]) {
    return this.treasury.createAccount(user, body);
  }

  @Patch('accounts/:id')
  updateAccount(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() body: { name?: string; notes?: string | null; isActive?: boolean; responsibleName?: string | null },
  ) {
    return this.treasury.updateAccount(user, id, body);
  }

  @Get('accounts/:id/ledger')
  ledger(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Query('from') from?: string,
    @Query('to') to?: string,
  ) {
    return this.treasury.ledger(user, id, { from, to });
  }

  @Post('transfers')
  transfer(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryService['transfer']>[1]) {
    return this.treasury.transfer(user, body);
  }

  @Get('documents')
  documents(
    @CurrentUser() user: Actor,
    @Query('kind') kind: 'income' | 'expense',
    @Query('q') q?: string,
  ) {
    return this.treasury.listDocuments(user, kind === 'expense' ? 'expense' : 'income', q);
  }

  @Post('documents')
  createDocument(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryService['createDocument']>[1]) {
    return this.treasury.createDocument(user, body);
  }

  @Post('documents/:id/attachments')
  @UseInterceptors(FileInterceptor('file', { storage: memoryStorage(), limits: { fileSize: 8_000_000 } }))
  addAttachment(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @UploadedFile() file: { originalname: string; mimetype: string; buffer: Buffer },
  ) {
    return this.treasury.addAttachment(user, id, file);
  }

  @Post('documents/:id/settle')
  settle(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() body: { amount: string | number; accountId: string; occurredAt?: string; reference?: string | null },
  ) {
    return this.treasury.settleDocument(user, id, body);
  }

  @Get('receivables')
  receivablesList(@CurrentUser() user: Actor) {
    return this.receivables.list(user);
  }

  @Post('receivables')
  createReceivable(
    @CurrentUser() user: Actor,
    @Body() body: Parameters<TreasuryReceivablesService['create']>[1],
  ) {
    return this.receivables.create(user, body);
  }

  @Post('installments/:id/collect')
  collectInstallment(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() body: Parameters<TreasuryReceivablesService['collect']>[2],
  ) {
    return this.receivables.collect(user, id, body);
  }

  @Get('payroll')
  payroll(@CurrentUser() user: Actor) {
    return this.ops.listPayroll(user);
  }

  @Post('payroll')
  createPayroll(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryOpsService['createPayroll']>[1]) {
    return this.ops.createPayroll(user, body);
  }

  @Post('payroll/:id/pay')
  payPayroll(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() body: Parameters<TreasuryOpsService['payPayroll']>[2],
  ) {
    return this.ops.payPayroll(user, id, body);
  }

  @Get('recurring')
  recurring(@CurrentUser() user: Actor) {
    return this.ops.listRecurring(user);
  }

  @Post('recurring')
  createRecurring(
    @CurrentUser() user: Actor,
    @Body() body: Parameters<TreasuryOpsService['createRecurring']>[1],
  ) {
    return this.ops.createRecurring(user, body);
  }

  @Get('reports')
  report(
    @CurrentUser() user: Actor,
    @Query('from') from?: string,
    @Query('to') to?: string,
  ) {
    return this.ops.report(user, from, to);
  }

  @Get('reports/export')
  async exportReport(
    @CurrentUser() user: Actor,
    @Query('from') from?: string,
    @Query('to') to?: string,
  ) {
    const buffer = await this.ops.reportExcel(user, from, to);
    return new StreamableFile(buffer, {
      type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
      disposition: 'attachment; filename="treasury-report.xlsx"',
    });
  }

  @Post('reconciliations')
  reconcile(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryOpsService['reconcile']>[1]) {
    return this.ops.reconcile(user, body);
  }

  @Post('adjustments')
  adjust(@CurrentUser() user: Actor, @Body() body: Parameters<TreasuryOpsService['adjust']>[1]) {
    return this.ops.adjust(user, body);
  }

  @Post('documents/:id/void')
  voidDoc(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() body: { reason?: string },
  ) {
    return this.treasury.voidDocument(user, id, body.reason);
  }
}