package tasks

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

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

func handleUpload(handler *Handle) {
	handler.PostAuth("/tasks/start/image", 1, func(c *Context) *Error {

		read_form, err := c.R.MultipartReader()
		if err != nil {
			return c.JsonBadRequest("Please provide a valid form data request!")
		}

		var json_data string
		var file []byte

		for {
			part, err_part := read_form.NextPart()
			if err_part == io.EOF {
				break
			} else if err_part != nil {
				return c.JsonBadRequest("Please provide a valid form data request!")
			}
			if part.FormName() == "json_data" {
				buf := new(bytes.Buffer)
				buf.ReadFrom(part)
				json_data = buf.String()
			}
			if part.FormName() == "file" {
				buf := new(bytes.Buffer)
				buf.ReadFrom(part)
				file = buf.Bytes()
			}
		}

		var requestData struct {
			ModelId string `json:"id" validate:"required"`
		}

        _err := c.ParseJson(&requestData, json_data)
		if _err != nil {
			return _err
		}

		model, err := GetBaseModel(c.Db, requestData.ModelId)
		if err != nil {
			return c.Error500(err)
		}

		switch model.Status {
		case READY:
		case READY_RETRAIN:
		case READY_ALTERATION:
		case READY_ALTERATION_FAILED:
		case READY_RETRAIN_FAILED:
			// Model can run

		default:
			return c.SendJSONStatus(http.StatusBadRequest, "Model not in the correct status to be able to evaludate a model")
		}

		// TODO Check if the user can use this model

		type CreateNewTask struct {
			UserId   string `db:"user_id"`
			ModelId  string `db:"model_id"`
			TaskType int    `db:"task_type"`
			Status   int    `db:"status"`
		}

		newTask := CreateNewTask{
			UserId:  c.User.Id,
			ModelId: model.Id,
			// TODO move this to an enum
			TaskType: 1,
			Status:   0,
		}

		id, err := InsertReturnId(c, &newTask, "tasks", "id")
        if err != nil {
			return c.E500M("Error 500", err)
        }

		save_path := path.Join("savedData", model.Id, "tasks")
		os.MkdirAll(save_path, os.ModePerm)

		img_path := path.Join(save_path, id+"."+model.Format)

		img_file, err := os.Create(img_path)
		if err != nil {
            if _err := UpdateTaskStatus(c,id, -1, "Failed to create the file"); _err != nil {
                c.Logger.Error("Failed to update tasks")
            }
			return c.E500M("Failed to create the file", err)
		}
		defer img_file.Close()
		img_file.Write(file)

		if !TestImgForModel(c, model, img_path) {
            if _err := UpdateTaskStatus(c, id, -1, "The provided image is not a valid image for this model"); _err != nil {
                c.Logger.Error("Failed to update tasks")
            }
			return c.JsonBadRequest(struct {
                Message string `json:"message"`
                Id string `json:"task_id"`
            } { "Provided image does not match the model", id})
		}

        UpdateStatus(c, "tasks", id, 1)

        return c.SendJSON(struct {Id string `json:"id"`}{id})
	})
}