package service

import (
	"errors"
	"strconv"

	"github.com/flipped-aurora/gin-vue-admin/server/global"
	"github.com/flipped-aurora/gin-vue-admin/server/plugin/wechat-integration/model"
	"github.com/silenceper/wechat/v2/officialaccount/menu"
	"gorm.io/gorm"
)

type MpMenuService struct{}

// GetMenuList 获取菜单列表
func (m *MpMenuService) GetMenuList() ([]model.MpMenu, error) {
	var menus []model.MpMenu
	err := global.GVA_DB.Order("id asc").Find(&menus).Error
	if err != nil {
		return nil, err
	}
	return menus, nil
}

// CreateMenu 创建菜单
func (m *MpMenuService) CreateMenu(menuData *model.MpMenu) error {
	err := global.GVA_DB.Create(menuData).Error
	if err != nil {
		global.GVA_LOG.Error("创建菜单失败: " + err.Error())
		return err
	}
	return nil
}

// UpdateMenu 更新菜单
func (m *MpMenuService) UpdateMenu(menuData *model.MpMenu) error {
	err := global.GVA_DB.Save(menuData).Error
	if err != nil {
		global.GVA_LOG.Error("更新菜单失败: " + err.Error())
		return err
	}
	return nil
}

// DeleteMenu 删除菜单
func (m *MpMenuService) DeleteMenu(id uint) error {
	err := global.GVA_DB.Delete(&model.MpMenu{}, id).Error
	if err != nil {
		global.GVA_LOG.Error("删除菜单失败: " + err.Error())
		return err
	}
	return nil
}

// GetMenuByID 根据ID获取菜单
func (m *MpMenuService) GetMenuByID(id uint) (*model.MpMenu, error) {
	var menuItem model.MpMenu
	err := global.GVA_DB.Where("id = ?", id).First(&menuItem).Error
	if err != nil {
		return nil, err
	}
	return &menuItem, nil
}

// PublishMenu 发布菜单到微信服务器
func (m *MpMenuService) PublishMenu() error {
	// 获取所有菜单
	menus, err := m.GetMenuList()
	if err != nil {
		return err
	}

	// 构建微信菜单结构
	wechatMenus := m.buildWechatMenus(menus)

	// 获取微信公众号实例
	mpUserService := &MpUserService{}
	oa, err := mpUserService.GetOfficialAccount()
	if err != nil {
		return err
	}

	// 发布菜单
	err = oa.GetMenu().SetMenu(wechatMenus)
	if err != nil {
		global.GVA_LOG.Error("发布菜单到微信服务器失败: " + err.Error())
		return err
	}

	global.GVA_LOG.Info("菜单发布成功")
	return nil
}

// DeleteWechatMenu 删除微信服务器上的菜单
func (m *MpMenuService) DeleteWechatMenu() error {
	mpUserService := &MpUserService{}
	oa, err := mpUserService.GetOfficialAccount()
	if err != nil {
		return err
	}

	err = oa.GetMenu().DeleteMenu()
	if err != nil {
		global.GVA_LOG.Error("删除微信菜单失败: " + err.Error())
		return err
	}

	global.GVA_LOG.Info("微信菜单删除成功")
	return nil
}

// buildWechatMenus 构建微信菜单结构
func (m *MpMenuService) buildWechatMenus(menus []model.MpMenu) []*menu.Button {
	var buttons []*menu.Button

	// 找出一级菜单
	for _, menuItem := range menus {
		if !menuItem.HasParent() {
			button := &menu.Button{
				Name: *menuItem.Name,
				Type: menuItem.Type,
			}

			// 设置菜单属性
			if menuItem.IsClickType() && menuItem.MenuKey != nil {
				button.Key = *menuItem.MenuKey
			} else if menuItem.IsViewType() && menuItem.URL != nil {
				button.URL = *menuItem.URL
			} else if menuItem.IsMiniProgramType() {
				if menuItem.URL != nil {
					button.URL = *menuItem.URL
				}
				if menuItem.MiniProgramAppID != nil {
					button.AppID = *menuItem.MiniProgramAppID
				}
				if menuItem.MiniProgramPagePath != nil {
					button.PagePath = *menuItem.MiniProgramPagePath
				}
			}

			// 查找子菜单
			subButtons := m.findSubMenus(menus, menuItem.ID)
			if len(subButtons) > 0 {
				button.SubButtons = subButtons
				// 有子菜单时，清除父菜单的类型和属性
				button.Type = ""
				button.Key = ""
				button.URL = ""
			}

			buttons = append(buttons, button)
		}
	}

	return buttons
}

// findSubMenus 查找子菜单
func (m *MpMenuService) findSubMenus(menus []model.MpMenu, parentID uint) []*menu.Button {
	var subButtons []*menu.Button
	parentIDStr := strconv.FormatUint(uint64(parentID), 10)

	for _, menuItem := range menus {
		if menuItem.ParentID != nil && *menuItem.ParentID == parentIDStr {
			button := &menu.Button{
				Name: *menuItem.Name,
				Type: menuItem.Type,
			}

			// 设置菜单属性
			if menuItem.IsClickType() && menuItem.MenuKey != nil {
				button.Key = *menuItem.MenuKey
			} else if menuItem.IsViewType() && menuItem.URL != nil {
				button.URL = *menuItem.URL
			} else if menuItem.IsMiniProgramType() {
				if menuItem.URL != nil {
					button.URL = *menuItem.URL
				}
				if menuItem.MiniProgramAppID != nil {
					button.AppID = *menuItem.MiniProgramAppID
				}
				if menuItem.MiniProgramPagePath != nil {
					button.PagePath = *menuItem.MiniProgramPagePath
				}
			}

			subButtons = append(subButtons, button)
		}
	}

	return subButtons
}

// ProcessMenuClick 处理菜单点击事件
func (m *MpMenuService) ProcessMenuClick(openid, menuKey string) error {
	// 查找菜单项
	var menuItem model.MpMenu
	err := global.GVA_DB.Where("menu_key = ?", menuKey).First(&menuItem).Error
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			global.GVA_LOG.Warn("未找到菜单项: " + menuKey)
			return nil
		}
		return err
	}

	// 如果有回复内容，发送回复
	if menuItem.ReplyMessageType != nil && menuItem.ReplyContent != nil {
		messageService := &MpMessageService{}

		switch *menuItem.ReplyMessageType {
		case "text":
			err = messageService.SendTextMessage(openid, *menuItem.ReplyContent)
			if err != nil {
				global.GVA_LOG.Error("发送菜单回复失败: " + err.Error())
				return err
			}
		}
	}

	return nil
}