// Package admin_system_login_log 提供管理员登录日志服务：写（Record，登录成功/失败落库）与读（List，分页查询）。
package admin_system_login_log

import (
	"context"

	"github.com/gogf/gf/v2/errors/gerror"

	"service.xpcool.com/internal/dao"
	"service.xpcool.com/internal/model/do"
	"service.xpcool.com/internal/model/dto"
	"service.xpcool.com/internal/model/entity"
)

// LoginEvent 管理员登录日志事件。
type LoginEvent struct {
	Username   string
	IP         string
	UserAgent  string
	Status     int    // 1 成功, 0 失败
	FailReason string // 失败原因（成功时为空）
}

// IAdminLoginLog 登录日志服务接口：审计写入 + 分页查询。
type IAdminLoginLog interface {
	Record(context.Context, LoginEvent) error
	List(context.Context, dto.LoginLogQuery) ([]*dto.LoginLogItem, int, error)
}

var localAdminLoginLog IAdminLoginLog

type adminLoginLog struct{}

func AdminLoginLog() IAdminLoginLog {
	if localAdminLoginLog == nil {
		panic("AdminLoginLog implementation not registered")
	}
	return localAdminLoginLog
}
func RegisterAdminLoginLog(i IAdminLoginLog) { localAdminLoginLog = i }

func NewAdminLoginLog() IAdminLoginLog { return &adminLoginLog{} }

// Record 写入一条登录日志（成功或失败）。
func (s *adminLoginLog) Record(ctx context.Context, e LoginEvent) error {
	_, err := dao.AdminLoginLog.Ctx(ctx).Data(do.AdminLoginLog{
		Username: e.Username, Ip: e.IP, UserAgent: e.UserAgent,
		Status: e.Status, FailReason: e.FailReason,
	}).Insert()
	return gerror.Wrap(err, "insert login log")
}

// List 分页查询管理员登录日志，支持账号与结果过滤（Status 为 nil 时不过滤）。
func (s *adminLoginLog) List(ctx context.Context, q dto.LoginLogQuery) ([]*dto.LoginLogItem, int, error) {
	m := dao.AdminLoginLog.Ctx(ctx)
	if q.Username != "" {
		m = m.WhereLike("username", "%"+q.Username+"%")
	}
	if q.Status != nil {
		m = m.Where(do.AdminLoginLog{Status: *q.Status})
	}
	total, err := m.Count()
	if err != nil {
		return nil, 0, gerror.Wrap(err, "count login logs")
	}
	if total == 0 {
		return nil, 0, nil
	}
	var list []entity.AdminLoginLog
	if err = m.Page(q.Page, q.Size).OrderDesc("id").Scan(&list); err != nil {
		return nil, 0, gerror.Wrap(err, "query login logs")
	}
	items := make([]*dto.LoginLogItem, 0, len(list))
	for i := range list {
		l := &list[i]
		items = append(items, &dto.LoginLogItem{
			Id: l.Id, Username: l.Username, IP: l.Ip, UserAgent: l.UserAgent,
			Status: l.Status, FailReason: l.FailReason,
			CreatedAt: l.CreatedAt.Layout("2006-01-02 15:04:05"),
		})
	}
	return items, total, nil
}