package repository

import (
	"codeword/internal/models"
	"context"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"time"
)

type StatsRepository struct {
	mdb *mongo.Collection
}

func NewStatsRepository(deps Deps) *StatsRepository {

	return &StatsRepository{mdb: deps.Mdb}
}

func (r *StatsRepository) UpdateStatistics(ctx context.Context, key, userID string) error {
	update := bson.M{
		"$inc":  bson.M{"usageCount." + userID: 1},
		"$push": bson.M{"usageHistory." + userID: time.Now()},
	}

	opts := options.Update().SetUpsert(true)
	filter := bson.M{"_id": key}

	_, err := r.mdb.UpdateOne(ctx, filter, update, opts)
	return err
}

func (r *StatsRepository) GetAllStatistics(ctx context.Context) ([]models.PromoCodeStats, error) {
	filter := bson.M{}

	opts := options.Find()

	cursor, err := r.mdb.Find(ctx, filter, opts)
	if err != nil {
		return nil, err
	}
	defer cursor.Close(ctx)

	var promoCodeStatsList []models.PromoCodeStats
	for cursor.Next(ctx) {
		var promoCodeStats models.PromoCodeStats
		if err := cursor.Decode(&promoCodeStats); err != nil {
			return nil, err
		}
		promoCodeStatsList = append(promoCodeStatsList, promoCodeStats)
	}

	if err := cursor.Err(); err != nil {
		return nil, err
	}

	return promoCodeStatsList, nil
}