package sys

import (
	"SciencesServer/app/api/admin/model"
	"SciencesServer/app/basic/controller"
	model2 "SciencesServer/app/common/model"
	"SciencesServer/app/session"
	"SciencesServer/config"
	"SciencesServer/utils"
	"errors"
	"strings"
)

type Banner struct {
	*session.Admin
}

type BannerHandle func(session *session.Admin) *Banner

type (
	// BannerInfo 轮播图信息
	BannerInfo struct {
		ID       string `json:"id"`
		TenantID string `json:"tenant_id"`
		*model2.SysBanner
		Area   string `json:"area"`
		Images string `json:"images"`
	}
	// BannerLocalInfo 轮播图位置信息
	BannerLocalInfo struct {
		Title    string             `json:"title"`
		Children []*BannerLocalInfo `json:"children"`
	}
	// BannerMarkLocalInfo 轮播图临时位置信息
	BannerMarkLocalInfo struct {
		Title    string   `json:"title"`
		Children []string `json:"children"`
	}
	// BannerParams 轮播图参数信息
	BannerParams struct {
		ID, TenantID                       uint64
		Title, Local, Size, Images, Remark string
		IsMultiple                         int
	}
)

const (
	defaultFirstLevelKey string = "+home"
)

// tree 树状
func (c *Banner) tree(src map[string][]string, key string) []*BannerLocalInfo {
	out := make([]*BannerLocalInfo, 0)

	data, has := src[key]

	if !has {
		return nil
	}
	for _, v := range data {
		out = append(out, &BannerLocalInfo{
			Title:    v,
			Children: c.tree(src, v),
		})
	}
	return out
}

// merge 合并
func (c *Banner) merge(obj, parentObj string, out map[string][]string) {
	if _, has := out[parentObj]; !has {
		out[parentObj] = []string{obj}
		return
	}
	if !utils.InArray(obj, out[parentObj]) {
		out[parentObj] = append(out[parentObj], obj)
	}
}

// filter 筛选
func (c *Banner) filter(src []string, sep string) map[string][]string {
	// 解决方案>中小型企业
	// 解决方案>政府区域
	out := make(map[string][]string, 0)

	for _, v := range src {
		objs := strings.Split(v, sep)

		for i := 0; i < len(objs); i++ {
			parent := defaultFirstLevelKey

			if i > 0 {
				parent = objs[i-1]
			}
			c.merge(objs[i], parent, out)
		}
	}
	return out
}

// Instance 列表信息
func (c *Banner) Instance(tenantID uint64, title, local string, page, pageSize int) (*controller.ReturnPages, error) {
	mSysBanner := model.NewSysBanner()

	where := make([]*model2.ModelWhere, 0)

	if c.TenantID > 0 {
		where = append(where, model2.NewWhere("b.tenant_id", c.TenantID))
	}
	if tenantID > 0 {
		where = append(where, model2.NewWhere("b.tenant_id", tenantID))
	}
	if title != "" {
		where = append(where, model2.NewWhereLike("b.title", title))
	}
	if local != "" {
		where = append(where, model2.NewWhereLike("b.local", local))
	}
	var count int64

	out, err := mSysBanner.Banner(page, pageSize, &count, where...)

	if err != nil {
		return nil, err
	}
	list := make([]*BannerInfo, 0)

	for _, v := range out {
		list = append(list, &BannerInfo{
			ID: v.GetEncodeID(), TenantID: v.GetEncodeTenantID(),
			SysBanner: v.SysBanner,
			Area:      v.FormatBasic(),
			Images:    v.Images.AnalysisSlice(config.SettingInfo.Domain),
		})
	}
	return &controller.ReturnPages{Data: list, Count: count}, nil
}

// Form 数据操作
func (c *Banner) Form(params *BannerParams) error {
	mSysBanner := model.NewSysBanner()

	if params.ID > 0 {
		mSysBanner.ID = params.ID

		isExist, err := model2.FirstField(mSysBanner.SysBanner, []string{"id", "tenant_id", "created_at"})

		if err != nil {
			return err
		} else if !isExist {
			return errors.New("操作错误，轮播图信息不存在或已被删除")
		}
		if c.TenantID > 0 && c.TenantID != mSysBanner.TenantID {
			return errors.New("操作错误，无权限操作")
		}
	}
	mSysBanner.Title = params.Title
	mSysBanner.Local = params.Local
	mSysBanner.Images.Images = params.Images
	mSysBanner.Size = params.Size
	mSysBanner.IsMultiple = params.IsMultiple
	mSysBanner.Remark = params.Remark

	if mSysBanner.ID > 0 {
		if c.TenantID <= 0 {
			mSysBanner.TenantID = params.TenantID
		}
		return model2.Updates(mSysBanner.SysBanner, mSysBanner.SysBanner)
	}
	mSysBanner.TenantID = params.TenantID

	if c.TenantID > 0 {
		mSysBanner.TenantID = c.TenantID
	}
	return model2.Create(mSysBanner.SysBanner)
}

// Local 位置信息
func (c *Banner) Local(tenantID uint64) ([]*BannerLocalInfo, error) {
	mSysBanner := model.NewSysBanner()

	out := make([]string, 0)

	where := make([]*model2.ModelWhere, 0)

	if tenantID > 0 {
		where = append(where, model2.NewWhere("tenant_id", tenantID))
	}
	if err := model2.Pluck(mSysBanner.SysBanner, "local", &out, where...); err != nil {
		return nil, err
	}

	return c.tree(c.filter(out, ">"), defaultFirstLevelKey), nil
}

// Delete 删除操作
func (c *Banner) Delete(id uint64) error {
	mSysBanner := model.NewSysBanner()
	mSysBanner.ID = id

	isExist, err := model2.FirstField(mSysBanner.SysBanner, []string{"id", "tenant_id"})

	if err != nil {
		return err
	} else if !isExist {
		return errors.New("操作错误，轮播图信息不存在或已被删除")
	} else if c.TenantID > 0 && mSysBanner.TenantID != c.TenantID {
		return errors.New("操作错误，无权限操作")
	}
	return model2.Delete(mSysBanner.SysBanner)
}

func NewBanner() BannerHandle {
	return func(session *session.Admin) *Banner {
		return &Banner{session}
	}
}