package user

import (
	"context"
	"fmt"
	"strings"

	"github.com/perfect-panel/server/internal/model/user"
	"gorm.io/gorm"
)

func mapFamilyStatus(status uint8) string {
	if status == user.FamilyStatusActive {
		return "active"
	}
	return "disabled"
}

func mapFamilyRoleName(role uint8) string {
	switch role {
	case user.FamilyRoleOwner:
		return "owner"
	case user.FamilyRoleMember:
		return "member"
	default:
		return fmt.Sprintf("role_%d", role)
	}
}

func mapFamilyMemberStatusName(status uint8) string {
	switch status {
	case user.FamilyMemberActive:
		return "active"
	case user.FamilyMemberLeft:
		return "left"
	case user.FamilyMemberRemoved:
		return "removed"
	default:
		return fmt.Sprintf("status_%d", status)
	}
}

func normalizeFamilyStatusInput(status string) (uint8, bool) {
	switch strings.ToLower(strings.TrimSpace(status)) {
	case "", "all":
		return 0, false
	case "active", "1":
		return user.FamilyStatusActive, true
	case "disabled", "0":
		return 0, true
	default:
		return 0, false
	}
}

type identifierInfo struct {
	Identifier string
	AuthType   string
}

func findUserIdentifiers(ctx context.Context, db *gorm.DB, userIDs []int64) (map[int64]identifierInfo, error) {
	identifierMap := make(map[int64]identifierInfo)
	if len(userIDs) == 0 {
		return identifierMap, nil
	}

	type authRow struct {
		UserId         int64
		AuthType       string
		AuthIdentifier string
	}

	var rows []authRow
	err := db.WithContext(ctx).
		Table("user_auth_methods").
		Select("user_id, auth_type, auth_identifier").
		Where("user_id IN ? AND deleted_at IS NULL", userIDs).
		Scan(&rows).Error
	if err != nil {
		return nil, err
	}

	priority := map[string]int{
		"email":    1,
		"mobile":   2,
		"telegram": 3,
		"device":   4,
	}
	selectedPriority := make(map[int64]int, len(userIDs))

	for _, row := range rows {
		currentPriority := priority[row.AuthType]
		if currentPriority == 0 {
			currentPriority = 100
		}
		if previous, exists := selectedPriority[row.UserId]; exists && previous <= currentPriority {
			continue
		}
		selectedPriority[row.UserId] = currentPriority
		identifierMap[row.UserId] = identifierInfo{
			Identifier: row.AuthIdentifier,
			AuthType:   row.AuthType,
		}
	}

	return identifierMap, nil
}

func parseDeviceType(userAgent string) string {
	ua := strings.ToLower(userAgent)
	switch {
	case strings.Contains(ua, "iphone"):
		return "iPhone"
	case strings.Contains(ua, "ipad"):
		return "iPad"
	case strings.Contains(ua, "android"):
		return "Android"
	case strings.Contains(ua, "windows"):
		return "Windows"
	case strings.Contains(ua, "macintosh"), strings.Contains(ua, "mac os"):
		return "Mac"
	case strings.Contains(ua, "linux"):
		return "Linux"
	default:
		return ""
	}
}