package resources

import (
	"fmt"
	"strconv"
	"strings"
	"time"

	"git.bissendorf.co/bissendorf/unifood/m/v2/model/external/stwbremen"
	"git.bissendorf.co/bissendorf/unifood/m/v2/util"
)

func DishFromDTO(dish stwbremen.Dish) (*Dish, error) {
	date, err := time.Parse(time.DateOnly, dish.Date)
	if err != nil {
		return nil, fmt.Errorf("unable to parse dish date: %w", err)
	}

	return &Dish{
		Title:    dish.Title,
		Location: dish.Location,
		Date:     date,
		Tags:     strings.Split(strings.Replace(dish.Tags, " ", "", -1), ","),
		Counter:  dish.Counter,
		Prices: util.Map(dish.Prices, func(i *stwbremen.Price) (string, float32) {
			p, err := strconv.ParseFloat(strings.Trim(i.Price, " "), 32)
			if err != nil {
				p = 0
			}
			return i.Label, float32(p)
		}),
		Ingredients: util.Select(util.Transform(dish.Ingredients, func(i *stwbremen.Ingredient) ingredient {
			return ingredient{
				Name:        i.Label,
				Additionals: i.Additionals,
			}
		}), func(i *ingredient) bool { return i.Name != "" }),
	}, nil
}

const ResourceDish = "dish"

type Dish struct {
	Title       string
	Location    string
	Ingredients []ingredient
	Prices      map[string]float32
	Date        time.Time
	Counter     string
	Tags        []string
}

type ingredient struct {
	Name        string
	Additionals []string
}

func (d *Dish) Kind() string { return ResourceDish }
func (d *Dish) Name() string { return d.Title }

func (d *Dish) ColumnNames() []string { return []string{"Location", "Date", "Counter", "Price"} }
func (d *Dish) Columns() []any {
	return []any{d.Location, d.Date.Format(time.DateOnly), d.Counter, d.Prices["Studierende"]}
}