package handlers

import (
	"net/http"

	"github.com/gin-contrib/sessions"
	"github.com/gin-gonic/gin"
	"lan-manager/server/config"
	"lan-manager/server/middleware"
	"lan-manager/server/models"
)

type AuthHandler struct {
	Cfg *config.Config
}

func NewAuthHandler(cfg *config.Config) *AuthHandler {
	return &AuthHandler{Cfg: cfg}
}

func (h *AuthHandler) Login(c *gin.Context) {
	var req models.LoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	if req.Username != h.Cfg.AdminUser || req.Password != h.Cfg.AdminPass {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid credentials"})
		return
	}
	session := sessions.Default(c)
	session.Set(middleware.AdminSessionKey, req.Username)
	if err := session.Save(); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"username": req.Username, "is_admin": true})
}

func (h *AuthHandler) Logout(c *gin.Context) {
	session := sessions.Default(c)
	session.Delete(middleware.AdminSessionKey)
	_ = session.Save()
	c.JSON(http.StatusOK, gin.H{"message": "logged out"})
}

func (h *AuthHandler) Me(c *gin.Context) {
	session := sessions.Default(c)
	user := session.Get(middleware.AdminSessionKey)
	if user == nil {
		c.JSON(http.StatusOK, gin.H{"is_admin": false, "ui_refresh_interval": h.Cfg.UIRefreshInterval})
		return
	}
	c.JSON(http.StatusOK, gin.H{"is_admin": true, "username": user.(string), "ui_refresh_interval": h.Cfg.UIRefreshInterval})
}