package model

import (
	"app-cloudep-trade-service/internal/domain/order"
	"context"
	"errors"
	"time"

	"github.com/zeromicro/go-zero/core/stores/mon"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

var _ OrderModel = (*customOrderModel)(nil)

type (
	// OrderModel is an interface to be customized, add more methods here,
	// and implement the added methods in customOrderModel.
	OrderModel interface {
		orderModel
		UpdateStatus(ctx context.Context, data UpdateStatusReq) (*mongo.UpdateResult, error)
		UpdateTimeoutOrder(ctx context.Context, req UpdateTimeoutReq) (*mongo.UpdateResult, error)
		DeleteByBusinessID(ctx context.Context, id string) (*mongo.UpdateResult, error)
		FindOneBusinessID(ctx context.Context, id string) (*Order, error)
		ListOrder(ctx context.Context, req GetOrderListReq) ([]Order, int64, error)
	}

	customOrderModel struct {
		*defaultOrderModel
	}
	UpdateStatusReq struct {
		BusinessID string
		Status     int64
	}

	UpdateTimeoutReq struct {
		CreateTimeBefore int64
	}

	GetOrderListReq struct {
		PageIndex int64 `json:"page_index" validate:"required"`
		PageSize  int64 `json:"page_size" validate:"required"`

		ReferenceID   string  `json:"reference_id"`
		ReferenceUID  string  `json:"reference_uid"`
		BusinessID    string  `json:"business_id"`
		UID           string  `json:"uid"`
		OrderType     int     `json:"order_type"`
		DirectionType []int64 `json:"direction_type"`
		OrderStatus   []int64 `json:"order_status"`

		StartCreateTime       int64 `json:"start_create_time"`
		EndCreateTime         int64 `json:"end_create_time"`
		StartUpdateTime       int64 `json:"start_update_time"`
		EndUpdateTime         int64 `json:"end_update_time"`
		StartOrderArrivalTime int64 `json:"start_order_arrival_time"`
		EndOrderArrivalTime   int64 `json:"end_order_arrival_time"`
		StartOrderPaymentTime int64 `json:"start_order_payment_time"`
		EndOrderPaymentTime   int64 `json:"end_order_payment_time"`

		CryptoType string `json:"crypto_type"`
		TxHash     string `json:"tx_hash"`
	}
)

// NewOrderModel returns a model for the mongo.
func NewOrderModel(url, db, collection string, opts ...mon.Option) OrderModel {
	conn := mon.MustNewModel(url, db, collection, opts...)
	return &customOrderModel{
		defaultOrderModel: newDefaultOrderModel(conn),
	}
}

func (m *customOrderModel) UpdateStatus(ctx context.Context, data UpdateStatusReq) (*mongo.UpdateResult, error) {
	// 初始化 updates map
	updates := make(map[string]any)

	// 更新 update_time 和 status
	updates["update_time"] = time.Now().UTC().UnixNano()
	updates["order_status"] = data.Status

	// 使用 updates map 作為 $set 的內容
	res, err := m.conn.UpdateOne(ctx,
		bson.M{
			"business_id": data.BusinessID,
			"$or": []bson.M{
				{"delete_time": bson.M{"$exists": false}},
				{"delete_time": 0},
			},
		},
		bson.M{"$set": updates}, // 使用 updates 而不是整個 data
	)

	return res, err
}

func (m *customOrderModel) UpdateTimeoutOrder(ctx context.Context, req UpdateTimeoutReq) (*mongo.UpdateResult, error) {
	// 構建過濾條件，選擇創建時間在指定時間之前且狀態為 0 (創建) 的項目
	filter := bson.M{
		"create_time": bson.M{"$lt": req.CreateTimeBefore},
		"status":      order.Cancelled,
		"$or": []bson.M{
			{"delete_time": bson.M{"$exists": false}},
			{"delete_time": 0},
		},
	}

	// 更新內容，將狀態設置為 11，並更新 update_time
	updates := bson.M{
		"$set": bson.M{
			"status":      order.TimedOut,
			"update_time": time.Now().UTC().UnixNano(),
		},
	}

	// 執行更新操作
	res, err := m.conn.UpdateOne(ctx, filter, updates)
	return res, err
}

func (m *customOrderModel) DeleteByBusinessID(ctx context.Context, id string) (*mongo.UpdateResult, error) {
	filter := bson.M{
		"business_id": id,
		"$or": []bson.M{
			{"delete_time": bson.M{"$exists": false}},
			{"delete_time": 0},
		},
	}

	updates := bson.M{
		"$set": bson.M{
			"delete_time": time.Now().UTC().UnixNano(),
			"update_time": time.Now().UTC().UnixNano(),
		},
	}
	// 執行更新操作
	res, err := m.conn.UpdateOne(ctx, filter, updates)

	return res, err
}

func (m *defaultOrderModel) FindOneBusinessID(ctx context.Context, id string) (*Order, error) {
	var data Order
	filter := bson.M{"delete_time": bson.M{"$in": []any{0, nil}}}
	filter["business_id"] = id

	err := m.conn.FindOne(ctx, &data, filter)
	switch {
	case err == nil:
		return &data, nil
	case errors.Is(err, mon.ErrNotFound):
		return nil, ErrNotFound
	default:
		return nil, err
	}
}

func (m *customOrderModel) ListOrder(ctx context.Context, req GetOrderListReq) ([]Order, int64, error) {
	// 定義查詢過濾器
	filter := bson.M{
		"delete_time": bson.M{"$in": []any{0, nil}},
	}

	// 添加查詢條件
	if req.ReferenceID != "" {
		filter["reference_id"] = req.ReferenceID
	}
	if req.ReferenceUID != "" {
		filter["reference_uid"] = req.ReferenceUID
	}
	if req.BusinessID != "" {
		filter["business_id"] = req.BusinessID
	}
	if req.UID != "" {
		filter["order_uid"] = req.UID
	}
	if req.OrderType != 0 {
		filter["order_type"] = req.OrderType
	}
	if len(req.DirectionType) > 0 {
		filter["direction_type"] = bson.M{"$in": req.DirectionType}
	}
	if len(req.OrderStatus) > 0 {
		filter["order_status"] = bson.M{"$in": req.OrderStatus}
	}
	// 處理時間範圍
	if req.StartCreateTime != 0 {
		filter["create_time"] = bson.M{"$gte": req.StartCreateTime}
	}
	if req.EndCreateTime != 0 {
		filter["create_time"] = bson.M{"$lte": req.EndCreateTime}
	}
	if req.StartUpdateTime != 0 {
		filter["update_time"] = bson.M{"$gte": req.StartUpdateTime}
	}
	if req.EndUpdateTime != 0 {
		filter["update_time"] = bson.M{"$lte": req.EndUpdateTime}
	}
	if req.StartOrderArrivalTime != 0 {
		filter["order_arrival_time"] = bson.M{"$gte": req.StartOrderArrivalTime}
	}
	if req.EndOrderArrivalTime != 0 {
		filter["order_arrival_time"] = bson.M{"$lte": req.EndOrderArrivalTime}
	}
	if req.StartOrderPaymentTime != 0 {
		filter["order_payment_time"] = bson.M{"$gte": req.StartOrderPaymentTime}
	}
	if req.EndOrderPaymentTime != 0 {
		filter["order_payment_time"] = bson.M{"$lte": req.EndOrderPaymentTime}
	}
	if req.CryptoType != "" {
		filter["crypto_type"] = req.CryptoType
	}
	if req.TxHash != "" {
		filter["tx_hash"] = req.TxHash
	}

	// 計算符合條件的總數量
	totalCount, err := m.conn.CountDocuments(ctx, filter)
	if err != nil {
		return nil, 0, err
	}

	// 設定查詢選項，包含分頁
	findOptions := options.Find()
	findOptions.SetSkip((req.PageIndex - 1) * req.PageSize)
	findOptions.SetLimit(req.PageSize)

	// 執行查詢
	var orders []Order
	err = m.conn.Find(ctx, &orders, filter, findOptions)
	if err != nil {
		return nil, 0, err
	}

	return orders, totalCount, nil
}