package models

import (
	"net/http"
	"os"
	"path"

	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/db_types"
	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/utils"
)

func DeleteModel(c BasePack, id string) (err error) {
	c.GetLogger().Warnf("Removing model with id: %s", id)
	_, err = c.GetDb().Exec("delete from models where id=$1;", id)
	if err != nil {
		return
	}

	model_path := path.Join("./savedData", id)
	c.GetLogger().Warnf("Removing folder of model with id: %s at %s", id, model_path)
	err = os.RemoveAll(model_path)
	if err != nil {
		return
	}
	return
}

func deleteModelJSON(c *Context, id string) *Error {
	err := DeleteModel(c, id)
	if err != nil {
		return c.E500M("Failed to delete models", err)
	}
	return c.SendJSON(id)
}

func handleDelete(handle *Handle) {
	type DeleteModel struct {
		Id   string  `json:"id" validate:"required"`
		Name *string `json:"name,omitempty"`
	}
	DeleteAuthJson(handle, "/models/delete", User_Normal, func(c *Context, dat *DeleteModel) *Error {
		var model struct {
			Id     string
			Name   string
			Status int
		}
		err := GetDBOnce(c, &model, "models where id=$1 and user_id=$2;", dat.Id, c.User.Id)
		if err == NotFoundError {
			return c.SendJSONStatus(http.StatusNotFound, "Model not found!")
		} else if err != nil {
			return c.E500M("Faield to get model", err)
		}

		switch model.Status {
		case FAILED_TRAINING:
			fallthrough
		case FAILED_PREPARING_ZIP_FILE:
			fallthrough
		case FAILED_PREPARING_TRAINING:
			fallthrough
		case FAILED_PREPARING:
			return deleteModelJSON(c, dat.Id)

		case READY:
			fallthrough
		case READY_RETRAIN_FAILED:
			fallthrough
		case READY_ALTERATION_FAILED:
			fallthrough
		case CONFIRM_PRE_TRAINING:
			if dat.Name == nil {
				return c.JsonBadRequest("Provided name does not match the model name")
			}

			if *dat.Name != model.Name {
				return c.JsonBadRequest("Provided name does not match the model name")
			}

			return deleteModelJSON(c, dat.Id)
		default:
			c.Logger.Warn("Do not know how to handle model in status", "status", model.Status)
			return c.JsonBadRequest("Model in invalid status")
		}
	})
}