package order

import (
	"context"
	"fmt"
	"log"
	"time"

	"gitea.urkob.com/urko/btc-pay-checker/internal/domain"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
)

type Repo struct {
	collection *mongo.Collection
}

func NewRepo(collection *mongo.Collection) *Repo {
	return &Repo{
		collection: collection,
	}
}

func (repo *Repo) Insert(ctx context.Context, order *domain.Order) (primitive.ObjectID, error) {
	res, err := repo.collection.InsertOne(ctx, order)
	if err != nil {
		return primitive.NilObjectID, fmt.Errorf("v.collection.InsertOne: %s", err)
	}

	documentID, ok := res.InsertedID.(primitive.ObjectID)
	if !ok {
		return primitive.NilObjectID, fmt.Errorf("res.InsertedID")
	}

	return documentID, nil
}

func (repo *Repo) FromAmount(ctx context.Context, amount float64, timestamp time.Time) (*domain.Order, error) {
	order := &domain.Order{}
	filter := bson.M{
		"amount": amount,
		"expires_at": bson.M{
			"$gte": timestamp,
		},
		"paid_at": time.Time{},
	}

	count, err := repo.collection.CountDocuments(ctx, filter)
	if err != nil {
		return nil, fmt.Errorf("doc.Decode: %s", err)
	}

	if count <= 0 {
		return nil, fmt.Errorf("order not found")
	} else if count > 1 {
		return nil, fmt.Errorf("multiple orders found: %d", count)
	}

	doc := repo.collection.FindOne(ctx, filter)
	if err := doc.Decode(order); err != nil {
		return nil, fmt.Errorf("doc.Decode: %s", err)
	}
	return order, nil
}

func (repo *Repo) OrderCompleted(ctx context.Context, order *domain.Order) (*domain.Order, error) {
	updateOpts, err := repo.collection.UpdateOne(ctx, bson.M{"_id": order.ID},
		bson.M{
			"tx":      order.Tx,
			"block":   order.Block,
			"paid_at": time.Now(),
		},
	)
	if err != nil {
		return nil, fmt.Errorf("collection.UpdateOne: %s", err)
	}
	log.Printf("OrderCompleted update %+v\n", updateOpts)
	return order, nil
}