package v1

import (
	"encoding/json"
	"git.mowie.cc/konrad/Library/models"
	"github.com/labstack/echo"
	"net/http"
	"strconv"
	"strings"
)

type bookPayload struct {
	Book models.Book `json:"book" form:"book"`
}

// BookAddOrUpdate is the handler to add a book
func BookAddOrUpdate(c echo.Context) error {
	// Check for Request Content
	bookFromString := c.FormValue("book")
	var datBook models.Book

	if bookFromString == "" {
		b := new(bookPayload)
		if err := c.Bind(b); err != nil {
			return c.JSON(http.StatusBadRequest, models.Message{"No book model provided"})
		}
		datBook = b.Book
	} else {
		// Decode the JSON
		dec := json.NewDecoder(strings.NewReader(bookFromString))
		err := dec.Decode(&datBook)

		if err != nil {
			return c.JSON(http.StatusInternalServerError, models.Message{"Error decoding book: " + err.Error()})
		}
	}

	// Check if we have an ID other than the one in the struct
	id := c.Param("id")
	if id != "" {
		// Make int
		bookID, err := strconv.ParseInt(id, 10, 64)

		if err != nil {
			return c.JSON(http.StatusInternalServerError, models.Message{"Could not get book id"})
		}
		datBook.ID = bookID
	}

	// Check if we have at least a title
	if datBook.Title == "" && datBook.ID == 0 {
		return c.JSON(http.StatusBadRequest, models.Message{"You need at least a title to insert a new book!"})
	}

	// Insert or update the book
	newBook, err := models.AddOrUpdateBook(datBook)

	if err != nil {
		return c.JSON(http.StatusInternalServerError, models.Message{"Error"})
	}

	return c.JSON(http.StatusOK, newBook)
}