import {
  Body,
  Controller,
  Delete,
  Get,
  Param,
  Put,
  UseGuards,
} from '@nestjs/common';
import {
  ArrayMaxSize,
  IsArray,
  IsString,
  Matches,
  MaxLength,
} from 'class-validator';
import { JwtAuthGuard } from '../auth/jwt-auth.guard';
import { CurrentUser } from '../auth/current-user.decorator';
import { PrismaService } from '../prisma/prisma.service';

const TABLE_KEY_RE = /^[a-z0-9_.-]{1,80}$/i;

class SaveTablePrefDto {
  @IsArray()
  @ArrayMaxSize(80)
  @IsString({ each: true })
  @MaxLength(80, { each: true })
  hiddenColumns!: string[];
}

class TableKeyParam {
  @Matches(TABLE_KEY_RE)
  key!: string;
}

type Actor = { userId: string; organizationId: string };

@Controller('table-prefs')
@UseGuards(JwtAuthGuard)
export class TablePrefsController {
  constructor(private readonly prisma: PrismaService) {}

  @Get()
  async list(@CurrentUser() user: Actor) {
    const rows = await this.prisma.userTablePreference.findMany({
      where: { userId: user.userId, organizationId: user.organizationId },
      select: { tableKey: true, hiddenColumns: true },
    });
    const out: Record<string, string[]> = {};
    for (const row of rows) out[row.tableKey] = row.hiddenColumns;
    return out;
  }

  @Put(':key')
  async save(
    @CurrentUser() user: Actor,
    @Param() params: TableKeyParam,
    @Body() dto: SaveTablePrefDto,
  ) {
    const hiddenColumns = [...new Set(dto.hiddenColumns.map((c) => c.trim()).filter(Boolean))];
    const row = await this.prisma.userTablePreference.upsert({
      where: {
        userId_organizationId_tableKey: {
          userId: user.userId,
          organizationId: user.organizationId,
          tableKey: params.key,
        },
      },
      create: {
        userId: user.userId,
        organizationId: user.organizationId,
        tableKey: params.key,
        hiddenColumns,
      },
      update: { hiddenColumns },
      select: { tableKey: true, hiddenColumns: true },
    });
    return row;
  }

  @Delete(':key')
  async reset(@CurrentUser() user: Actor, @Param() params: TableKeyParam) {
    await this.prisma.userTablePreference.deleteMany({
      where: {
        userId: user.userId,
        organizationId: user.organizationId,
        tableKey: params.key,
      },
    });
    return { ok: true };
  }
}