package controller

import (
	"errors"
	"strconv"
	"time"

	"github.com/mhsanaei/3x-ui/v3/util/crypto"
	"github.com/mhsanaei/3x-ui/v3/web/entity"
	"github.com/mhsanaei/3x-ui/v3/web/service"
	"github.com/mhsanaei/3x-ui/v3/web/session"

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

// updateUserForm represents the form for updating user credentials.
type updateUserForm struct {
	OldUsername string `json:"oldUsername" form:"oldUsername"`
	OldPassword string `json:"oldPassword" form:"oldPassword"`
	NewUsername string `json:"newUsername" form:"newUsername"`
	NewPassword string `json:"newPassword" form:"newPassword"`
}

// SettingController handles settings and user management operations.
type SettingController struct {
	settingService  service.SettingService
	userService     service.UserService
	panelService    service.PanelService
	apiTokenService service.ApiTokenService
}

// NewSettingController creates a new SettingController and initializes its routes.
func NewSettingController(g *gin.RouterGroup) *SettingController {
	a := &SettingController{}
	a.initRouter(g)
	return a
}

// initRouter sets up the routes for settings management.
func (a *SettingController) initRouter(g *gin.RouterGroup) {
	g = g.Group("/setting")

	g.POST("/all", a.getAllSetting)
	g.POST("/defaultSettings", a.getDefaultSettings)
	g.POST("/update", a.updateSetting)
	g.POST("/updateUser", a.updateUser)
	g.POST("/restartPanel", a.restartPanel)
	g.GET("/getDefaultJsonConfig", a.getDefaultXrayConfig)
	g.GET("/apiTokens", a.listApiTokens)
	g.POST("/apiTokens/create", a.createApiToken)
	g.POST("/apiTokens/delete/:id", a.deleteApiToken)
	g.POST("/apiTokens/setEnabled/:id", a.setApiTokenEnabled)
}

// getAllSetting retrieves all current settings.
func (a *SettingController) getAllSetting(c *gin.Context) {
	allSetting, err := a.settingService.GetAllSetting()
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.getSettings"), err)
		return
	}
	jsonObj(c, allSetting, nil)
}

// getDefaultSettings retrieves the default settings based on the host.
func (a *SettingController) getDefaultSettings(c *gin.Context) {
	result, err := a.settingService.GetDefaultSettings(c.Request.Host)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.getSettings"), err)
		return
	}
	jsonObj(c, result, nil)
}

// updateSetting updates all settings with the provided data.
func (a *SettingController) updateSetting(c *gin.Context) {
	allSetting := &entity.AllSetting{}
	err := c.ShouldBind(allSetting)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	oldTwoFactor, twoFactorErr := a.settingService.GetTwoFactorEnable()
	err = a.settingService.UpdateAllSetting(allSetting)
	if err == nil && twoFactorErr == nil && !oldTwoFactor && allSetting.TwoFactorEnable {
		if bumpErr := a.userService.BumpLoginEpoch(); bumpErr != nil {
			err = bumpErr
		}
	}
	jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
}

// updateUser updates the current user's username and password.
func (a *SettingController) updateUser(c *gin.Context) {
	form := &updateUserForm{}
	err := c.ShouldBind(form)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	user := session.GetLoginUser(c)
	if user.Username != form.OldUsername || !crypto.CheckPasswordHash(user.Password, form.OldPassword) {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifyUserError"), errors.New(I18nWeb(c, "pages.settings.toasts.originalUserPassIncorrect")))
		return
	}
	if form.NewUsername == "" || form.NewPassword == "" {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifyUserError"), errors.New(I18nWeb(c, "pages.settings.toasts.userPassMustBeNotEmpty")))
		return
	}
	err = a.userService.UpdateUser(user.Id, form.NewUsername, form.NewPassword)
	if err == nil {
		user.Username = form.NewUsername
		user.Password, _ = crypto.HashPasswordAsBcrypt(form.NewPassword)
		if saveErr := session.SetLoginUser(c, user); saveErr != nil {
			err = saveErr
		}
	}
	jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifyUser"), err)
}

// restartPanel restarts the panel service after a delay.
func (a *SettingController) restartPanel(c *gin.Context) {
	err := a.panelService.RestartPanel(time.Second * 3)
	jsonMsg(c, I18nWeb(c, "pages.settings.restartPanelSuccess"), err)
}

// getDefaultXrayConfig retrieves the default Xray configuration.
func (a *SettingController) getDefaultXrayConfig(c *gin.Context) {
	defaultJsonConfig, err := a.settingService.GetDefaultXrayConfig()
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.getSettings"), err)
		return
	}
	jsonObj(c, defaultJsonConfig, nil)
}

type apiTokenCreateForm struct {
	Name string `json:"name" form:"name"`
}

type apiTokenEnabledForm struct {
	Enabled bool `json:"enabled" form:"enabled"`
}

func (a *SettingController) listApiTokens(c *gin.Context) {
	rows, err := a.apiTokenService.List()
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.getSettings"), err)
		return
	}
	jsonObj(c, rows, nil)
}

func (a *SettingController) createApiToken(c *gin.Context) {
	form := &apiTokenCreateForm{}
	if err := c.ShouldBind(form); err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	row, err := a.apiTokenService.Create(form.Name)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	jsonObj(c, row, nil)
}

func (a *SettingController) deleteApiToken(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), a.apiTokenService.Delete(id))
}

func (a *SettingController) setApiTokenEnabled(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), err)
		return
	}
	form := &apiTokenEnabledForm{}
	if bindErr := c.ShouldBind(form); bindErr != nil {
		jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), bindErr)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.settings.toasts.modifySettings"), a.apiTokenService.SetEnabled(id, form.Enabled))
}
