package controllers

import (
	"opsxloki/dto"
	"opsxloki/services"
	"opsxloki/utils"

	"github.com/gin-gonic/gin"
)

// LdapController LDAP 配置与用户导入(配置读写仅 admin)
type LdapController struct{}

func NewLdapController() *LdapController {
	return &LdapController{}
}

// GetConfig LDAP 配置(密码剔除,附 hasPassword/configured)
func (ctrl *LdapController) GetConfig(c *gin.Context) {
	utils.Success(c, services.GetLDAPPublicConfig())
}

// UpdateConfig 保存配置(bindPassword 空则保留旧值)
func (ctrl *LdapController) UpdateConfig(c *gin.Context) {
	var req dto.LdapConfigRequest
	if !utils.BindAndValidate(c, &req) {
		return
	}
	cfg := &services.LDAPConfig{
		Enabled: req.Enabled, Host: req.Host, Port: req.Port, UseSSL: req.UseSSL,
		BindDN: req.BindDN, BindPassword: req.BindPassword, BaseDN: req.BaseDN,
		UserFilter: req.UserFilter, UsernameAttr: req.UsernameAttr,
		NameAttr: req.NameAttr, EmailAttr: req.EmailAttr,
	}
	if err := services.SaveLDAPConfig(cfg); err != nil {
		utils.Error(c, 400, err.Error())
		return
	}
	utils.Success(c, services.GetLDAPPublicConfig())
}

// TestConnection 用表单参数测试(未保存也可测;密码空回退已存;可选用户级验证)
func (ctrl *LdapController) TestConnection(c *gin.Context) {
	var req dto.LdapConfigRequest
	if !utils.BindAndValidate(c, &req) {
		return
	}
	cfg := &services.LDAPConfig{
		Enabled: req.Enabled, Host: req.Host, Port: req.Port, UseSSL: req.UseSSL,
		BindDN: req.BindDN, BindPassword: req.BindPassword, BaseDN: req.BaseDN,
		UserFilter: req.UserFilter, UsernameAttr: req.UsernameAttr,
		NameAttr: req.NameAttr, EmailAttr: req.EmailAttr,
	}
	if cfg.Port == 0 {
		cfg.Port = 389
	}
	result := services.TestLDAPConnection(cfg, req.TestUsername, req.TestPassword)
	utils.Success(c, result)
}

// ListUsers 导入预览:按 ouDN(空用 baseDN)搜索用户
func (ctrl *LdapController) ListUsers(c *gin.Context) {
	var req dto.LdapUsersRequest
	if !utils.BindAndValidate(c, &req) {
		return
	}
	cfg := services.GetLDAPConfig()
	if !cfg.Enabled || cfg.Host == "" {
		utils.Error(c, 400, "LDAP 未启用或未配置")
		return
	}
	if req.BindPassword != "" {
		cfg.BindPassword = req.BindPassword
	}
	users, err := services.SearchLDAPUsersForImport(cfg, req.OUDN)
	if err != nil {
		utils.Error(c, 400, err.Error())
		return
	}
	utils.Success(c, users)
}