package models

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
	"strconv"
	"strings"
)

type PaperSize string

const (
	A3   PaperSize = "A3"
	A4   PaperSize = "A4"
	A5   PaperSize = "A5"
	SRA3 PaperSize = "SRA3"
)

func ParseSize(s string) (c PaperSize, err error) {
	s = strings.ToUpper(s)
	if s == "A3" {
		return A3, nil
	} else if s == "A4" {
		return A4, nil
	} else if s == "A5" {
		return A5, nil
	} else if s == "SRA3" {
		return SRA3, nil
	}

	return c, fmt.Errorf("Cannot parse category %s", s)
}

type Paper struct {
	gorm.Model
	Name   string    `json:"name" binding:"required" gorm:"not null"`
	Brand  string    `json:"brand" binding:"required"`
	Size   PaperSize `json:"size" binding:"required"`
	Weight int       `json:"weight" binding:"required"`
	Price  float64   `json:"price" binding:"required"`
}

func NewPaper(ctx *gin.Context) (Paper, error) {
	name := ctx.PostForm("name")
	brand := ctx.PostForm("brand")
	sizeTmp := ctx.PostForm("size")
	weightTmp := ctx.PostForm("weight")
	priceTmp := ctx.PostForm("price")

	size, err := ParseSize(sizeTmp)

	if err != nil {
		return Paper{}, fmt.Errorf("Couldnt parse Size")
	}

	weight, err := strconv.Atoi(weightTmp)

	if err != nil {
		return Paper{}, fmt.Errorf("Couldnt parse Weight")
	}

	price, err := strconv.ParseFloat(priceTmp, 64)

	if err != nil {
		return Paper{}, fmt.Errorf("Couldnt parse Price")
	}

	if name == "" || brand == "" {
		return Paper{}, fmt.Errorf("Name or brand empty")
	}

	// Convert the price string to float64
	tag := Paper{
		Name:   name,
		Brand:  brand,
		Size:   size,
		Weight: weight,
		Price:  price,
	}

	return tag, nil
}