package command

import (
	"fmt"
	"strings"
	"time"

	"github.com/google/uuid"
	"go-mod.ewintr.nl/planner/item"
)

func NewAdd(deps Dependencies, main []string, fields map[string]string) (Command, error) {
	if len(main) == 0 || main[0] != "add" {
		return nil, ErrWrongCommand
	}
	main = main[1:]
	if len(main) == 0 {
		return nil, fmt.Errorf("%w: title is required for add", ErrInvalidArg)
	}

	title := strings.Join(main, ",")

	if val, ok := fields[FieldDate]; ok {
		d := item.NewDateFromString(val)
		if d.IsZero() {
			return nil, fmt.Errorf("%w: could not parse date", ErrInvalidArg)
		}
		params.Date = d
	}
	if val, ok := fields[FieldTime]; ok {
		t := item.NewTimeFromString(val)
		if t.IsZero() {
			return nil, fmt.Errorf("%w: could not parse time", ErrInvalidArg)
		}
		params.Time = t
	}
	if val, ok := fields[FieldDuration]; ok {
		d, err := time.ParseDuration(val)
		if err != nil {
			return nil, fmt.Errorf("%w: could not parse duration", ErrInvalidArg)
		}
		params.Duration = d
	}
	if val, ok := fields[FieldRecurrer]; ok {
		rec := item.NewRecurrer(val)
		if rec == nil {
			return nil, fmt.Errorf("%w: could not parse recurrer", ErrInvalidArg)
		}
		params.Recurrer = rec
	}

	tsk := item.Task{
		ID:       uuid.New().String(),
		Date:     store.params.Date,
		Recurrer: store.params.Recurrer,
		TaskBody: item.TaskBody{
			Title:    store.params.Title,
			Time:     store.params.Time,
			Duration: store.params.Duration,
		},
	}
	if tsk.Recurrer != nil {
		tsk.RecurNext = tsk.Recurrer.First()
	}

	return &Store{
		deps:   deps,
		params: params,
	}, nil
}