package handlers

import (
	"context"
	"encoding/json"
	"fmt"

	"lone-services/pkg/utils"
	"lone-services/pkg/wecom/message"
	"lone-services/services/wecom/internal/dao"
	"lone-services/services/wecom/internal/logic/message/builder"
	msgutil "lone-services/services/wecom/internal/logic/message/utils"
)

type AddressNotifySecondHandler struct{}

func (h AddressNotifySecondHandler) Build(ctx context.Context, job dao.WeComJob) ([]*message.SendRequest, error) {
	change, err := msgutil.GetLatestReviewChange(job.BizType, int64(job.BizId))
	if err != nil {
		return nil, err
	}

	fields := []dao.FieldConfig{
		{Field: "type_name", Label: "门店名称"},
		{Field: "name", Label: "收货人"},
		{Field: "address", Label: "地址"},
		{Field: "district", Label: "地区"},
		{Field: "mobile", Label: "收货人电话"},
	}

	content, err := BuildAddressDiff(msgutil.DiffContent(change), fields)
	if err != nil {
		return nil, err
	}

	card := builder.TextCardParams{
		ToUser:  utils.GetConfigString("wecom.address_reviewer_ids"),
		Desc:    "地址通知",
		Title:   "地址审核通知",
		Content: content,
	}

	req, err := builder.TextCard(card)
	if err != nil {
		return nil, err
	}
	return []*message.SendRequest{req}, nil
}

func BuildAddressDiff(content string, fields []dao.FieldConfig) ([]message.HorizontalContent, error) {
	var data struct {
		Old map[string]interface{} `json:"old"`
		New map[string]interface{} `json:"new"`
	}
	if err := json.Unmarshal([]byte(content), &data); err != nil {
		return nil, err
	}

	result := make([]message.HorizontalContent, 0)
	districtOld := msgutil.GetMapString(data.Old, "district")
	districtNew := msgutil.GetMapString(data.New, "district")

	for _, field := range fields {
		if field.Field == "district" {
			continue
		}

		oldValue := msgutil.GetMapString(data.Old, field.Field)
		newValue := msgutil.GetMapString(data.New, field.Field)

		if field.Field == "type_name" && newValue == utils.StringEmpty {
			newValue = oldValue
		}

		if field.Field == "address" {
			if districtOld != utils.StringEmpty {
				oldValue = districtOld + oldValue
			}
			if districtNew != utils.StringEmpty {
				newValue = districtNew + newValue
			}
		}

		if field.Field == "mobile" && oldValue != utils.StringEmpty {
			if decryptOld, err := utils.Decrypt(oldValue); err == nil {
				oldValue = decryptOld
			}
		}

		value := newValue
		if oldValue != utils.StringEmpty &&
			oldValue != utils.StringZero &&
			oldValue != newValue {
			value = fmt.Sprintf("%s → %s", oldValue, newValue)
		}

		result = append(result, message.HorizontalContent{
			KeyName: field.Label,
			Value:   value,
		})
	}
	return result, nil
}