package ical

import (
	"encoding/json"
	"github.com/pocketbase/dbx"
	"github.com/pocketbase/pocketbase"
	"htwkalender/model"
)

//update ical feed json
//add uuid field
//remove module name field

func MigrateFeedJson(app *pocketbase.PocketBase) {

	var feeds []model.Feed

	err := app.Dao().DB().Select("*").From("feed").All(&feeds)
	if err != nil {
		return
	}

	for _, feed := range feeds {

		var modules []model.FeedCollection

		err := json.Unmarshal([]byte(feed.Modules), &modules)
		if err != nil {
			return
		}

		var uuidFeedCollection model.UUIDFeedCollection

		for _, module := range modules {
			uuid := searchUUIDForModule(app, module.Name)

			if uuid != "" {
				uuidFeedCollection = model.UUIDFeedCollection{UUID: uuid, Name: module.Name, Course: module.Course, UserDefinedName: module.UserDefinedName}
				app.Dao().DB().Update("feed", dbx.Params{"modules": uuidFeedCollection}, dbx.NewExp("id = {:id}", dbx.Params{"id": feed.Id}))
			}
		}

	}

}

func searchUUIDForModule(app *pocketbase.PocketBase, module string) string {
	var uuid string
	err := app.Dao().DB().Select("uuid").From("module").Where(dbx.NewExp("name = {:name}", dbx.Params{"name": module})).One(&uuid)
	if err != nil {
		return ""
	}
	return uuid
}