package dishes

import (
	"context"
	"fmt"
	"time"

	"git.bissendorf.co/bissendorf/unifood/m/v2/core/interfaces"
	"git.bissendorf.co/bissendorf/unifood/m/v2/core/interfaces/params"
	"git.bissendorf.co/bissendorf/unifood/m/v2/model/external/stwbremen"
	"git.bissendorf.co/bissendorf/unifood/m/v2/model/resources"
	"git.bissendorf.co/bissendorf/unifood/m/v2/util"
)

type DishesHandler struct {
	interfaces.ResourceHandler
	interfaces.GetHandler

	QueryClient interfaces.QueryClient[[]stwbremen.Dish]
}

const (
	paramDate     = "date"
	paramLocation = "location"
)

func (h *DishesHandler) Get(ctx context.Context, params params.Container) ([]any, error) {
	// Read parameters
	p, err := params.GetValue(paramDate)
	if err != nil {
		return nil, fmt.Errorf("unable to parse date parameter: %w", err)
	}
	date := p.(time.Time)

	location, err := params.GetValue(paramLocation)
	if err != nil {
		return nil, fmt.Errorf("unable to parse location parameter: %w", err)
	}

	// Build query
	query := fmt.Sprintf(
		`page('meals').children.filterBy('location', '%s').filterBy('date', '%s').filterBy('printonly', 0)`,
		location,
		date.Format(time.DateOnly),
	)

	// Run query
	dishes, err := h.QueryClient.Get(ctx,
		query,
		`{"title":true,"ingredients":"page.ingredients.toObject","prices":"page.prices.toObject","location":true,"counter":true,"date":true,"mealadds":true,"mark":true,"frei3":true,"printonly":true,"kombicategory":true,"categories":"page.categories.split"}`,
		false,
	)
	if err != nil {
		return nil, fmt.Errorf("querying menu failed: %w", err)
	}

	// Return
	return util.Transform(*dishes, func(i *stwbremen.Dish) any {
		d, err := resources.DishFromDTO(*i)
		if err != nil {
			return resources.Dish{}
		}

		return *d
	}), nil

}

func (h *DishesHandler) GetParametersForVerb(verb interfaces.Verb) []params.Registration {
	return []params.Registration{
		{
			Name:        paramDate,
			ShortHand:   "d",
			Description: "Menu date",
			DefaultFunc: func() string { return time.Now().Format(time.DateOnly) },
			ParseFunc:   func(value string) (any, error) { return time.Parse(time.DateOnly, value) },
		},
		{
			Name:        paramLocation,
			ShortHand:   "l",
			Description: "Define the restaurant",
			DefaultFunc: func() string { return "330" },
			ParseFunc:   params.ParseString,
		},
	}
}