package controller

import (
	"SciencesServer/app/api/website/model"
	"SciencesServer/app/basic/controller"
	model2 "SciencesServer/app/common/model"
	"SciencesServer/app/session"
	"errors"
)

type Activity struct {
	*session.Enterprise
	local string
}

type ActivityHandle func(session *session.Enterprise, local string) *Activity

type (
	// ActivityInfo 活动信息
	ActivityInfo struct {
		ID string `json:"id"`
		*model.ActivityInstanceInfo
		JoinStatus bool `json:"join_status"`
	}
	// ActivityDetail 详细信息
	ActivityDetail struct {
		ID string `json:"id"`
		*model.ActivityInstanceDetail
		JoinStatus bool `json:"join_status"`
	}
)

// Instance 活动信息
func (c *Activity) Instance(title string, mode, page, pageSize int) (*controller.ReturnPages, error) {
	mActivityInstance := model.NewActivityInstance()

	var count int64

	var identityUID uint64

	if c.Enterprise != nil {
		identityUID = c.IdentityUID
	}
	where := make([]*model2.ModelWhere, 0)

	if title != "" {
		where = append(where, model2.NewWhereLike("a.title", title))
	}
	if mode > 0 {
		where = append(where, model2.NewWhere("a.mode", mode))
	}
	out, err := mActivityInstance.Activity(identityUID, page, pageSize, &count)

	if err != nil {
		return nil, err
	}

	list := make([]*ActivityInfo, 0)

	for _, v := range out {
		list = append(list, &ActivityInfo{
			ID:                   v.GetEncodeID(),
			ActivityInstanceInfo: v,
			JoinStatus:           v.JoinID > 0,
		})
	}
	return &controller.ReturnPages{Data: list, Count: count}, nil
}

// Detail 详细信息
func (c *Activity) Detail(id uint64) (*ActivityDetail, error) {
	mActivityInstance := model.NewActivityInstance()

	var identityUID uint64

	if c.Enterprise != nil {
		identityUID = c.IdentityUID
	}
	out, err := mActivityInstance.Detail(id, identityUID)

	if err != nil {
		return nil, err
	}
	return &ActivityDetail{
		ID:                     out.GetEncodeID(),
		ActivityInstanceDetail: out,
		JoinStatus:             out.JoinID > 0.,
	}, nil
}

// Join 加入活动
func (c *Activity) Join(id uint64) error {
	mActivityInstance := model.NewActivityInstance()

	isExist, err := model2.FirstField(mActivityInstance.ActivityInstance, []string{"id", "mode", "join_deadline"},
		model2.NewWhere("status", model2.NewWhere("id", id)),
		model2.NewWhere("status", model2.ActivityInstanceStatusForShow))

	if err != nil {
		return err
	} else if !isExist {
		return errors.New("操作错误，活动信息不存在或已被删除")
	}
	if !mActivityInstance.IsCanJoin() {
		return errors.New("操作错误，当前活动信息不可报名")
	}

	return nil
}

func NewActivity() ActivityHandle {
	return func(session *session.Enterprise, local string) *Activity {
		return &Activity{
			Enterprise: session,
			local:      local,
		}
	}
}