package controllers

import (
	"go_blog/models"
	"go_blog/utils"
	"net/http"

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

// getThemeManager 从上下文中获取主题管理器
func getThemeManager(c *gin.Context) (*utils.ThemeManager, bool) {
	tm, exists := c.Get("ThemeManager")
	if !exists {
		return nil, false
	}
	themeManager, ok := tm.(*utils.ThemeManager)
	return themeManager, ok
}

// getDB 从上下文中获取数据库实例
func getDB(c *gin.Context) (*gorm.DB, bool) {
	dbInterface, exists := c.Get("DB")
	if !exists {
		return nil, false
	}
	db, ok := dbInterface.(*gorm.DB)
	return db, ok
}

// Home 首页
func Home(c *gin.Context) {
	themeManager, ok := getThemeManager(c)
	if !ok {
		c.String(http.StatusInternalServerError, "Theme manager not found")
		return
	}

	db, ok := getDB(c)
	if !ok {
		c.String(http.StatusInternalServerError, "DB not found")
		return
	}

	var items []models.Content
	result := db.Select("*").Limit(5).Find(&items, "type = ?", "post")
	if result.Error != nil {
		c.String(http.StatusInternalServerError, "Database error: "+result.Error.Error())
		return
	}

	tpl := themeManager.GetTemplate("index")
	if tpl == nil {
		c.String(http.StatusInternalServerError, "Template 'index' not found")
		return
	}

	data := gin.H{
		"Items": items,
		"Title": "首页",
	}

	c.Header("Content-Type", "text/html; charset=utf-8")
	if err := tpl.Execute(c.Writer, data); err != nil {
		c.String(http.StatusInternalServerError, "Template render error: "+err.Error())
	}
}