import { Controller, Get, Render, UseGuards, Req, Query } from '@nestjs/common';
import { AuthenticatedGuard } from '../auth/guards/authenticated.guard';
import { UtilsService } from '../utils/utils.service';

@Controller('progress')
@UseGuards(AuthenticatedGuard)
export class ProgressController {
  constructor(private utilsService: UtilsService) {}

  @Get()
  @Render('progress')
  async getProgress(@Req() req, @Query('days') daysQuery: string) {
    try {
      const days = parseInt(daysQuery) || 30;

      const weightTrend = await this.utilsService.getWeightTrend(req.user.id, days);
      const calorieTrend = await this.utilsService.getCalorieTrend(req.user.id, days);

      let avgCalories = 0,
        avgProtein = 0,
        avgCarbs = 0,
        avgFat = 0;

      if (calorieTrend.length > 0) {
        avgCalories = calorieTrend.reduce((sum, d) => sum + d.calories, 0) / calorieTrend.length;
        avgProtein = calorieTrend.reduce((sum, d) => sum + d.protein, 0) / calorieTrend.length;
        avgCarbs = calorieTrend.reduce((sum, d) => sum + d.carbs, 0) / calorieTrend.length;
        avgFat = calorieTrend.reduce((sum, d) => sum + d.fat, 0) / calorieTrend.length;
      }

      let weightChange = null;
      if (weightTrend.length >= 2) {
        weightChange = weightTrend[weightTrend.length - 1].weight_kg - weightTrend[0].weight_kg;
      }

      return {
        user: req.user,
        weight_trend: weightTrend,
        calorie_trend: calorieTrend,
        avg_calories: Math.round(avgCalories),
        avg_protein: Math.round(avgProtein),
        avg_carbs: Math.round(avgCarbs),
        avg_fat: Math.round(avgFat),
        weight_change: weightChange,
        days,
      };
    } catch (err) {
      console.error(err);
      req.flash('error_msg', 'Error loading progress');
      return {
        user: req.user,
        weight_trend: [],
        calorie_trend: [],
        avg_calories: 0,
        avg_protein: 0,
        avg_carbs: 0,
        avg_fat: 0,
        weight_change: null,
        days: 30,
      };
    }
  }
}