package command

import (
	"fmt"
	"time"

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

type AddCmd struct {
	localIDRepo storage.LocalID
	eventRepo   storage.Event
	syncRepo    storage.Sync
}

func NewAddCmd(localRepo storage.LocalID, eventRepo storage.Event, syncRepo storage.Sync) Command {
	return &AddCmd{
		localIDRepo: localRepo,
		eventRepo:   eventRepo,
		syncRepo:    syncRepo,
	}
}

func (add *AddCmd) Do(args []string) (bool, error) {
	if len(args) == 0 || args[0] != "add" {
		return false, nil
	}
	title, flags, err := ParseArgs(args[1:])
	if err != nil {
		return false, err
	}

	if nameStr == "" {
		return fmt.Errorf("%w: name is required", ErrInvalidArg)
	}
	if onStr == "" {
		return fmt.Errorf("%w: date is required", ErrInvalidArg)
	}
	if atStr == "" && frStr != "" {
		return fmt.Errorf("%w: can not have duration without start time", ErrInvalidArg)
	}
	if atStr == "" && frStr == "" {
		frStr = "24h"
	}
	if err := add.Action(title, flags); err != nil {
		return false, err
	}

	return true, nil
}

func (add *AddCmd) Action(nameStr, onStr, atStr, frStr string) error {

	startFormat := "2006-01-02"
	startStr := onStr
	if atStr != "" {
		startFormat = fmt.Sprintf("%s 15:04", startFormat)
		startStr = fmt.Sprintf("%s %s", startStr, atStr)
	}
	start, err := time.Parse(startFormat, startStr)
	if err != nil {
		return fmt.Errorf("%w: could not parse start time and date: %v", ErrInvalidArg, err)
	}

	e := item.Event{
		ID: uuid.New().String(),
		EventBody: item.EventBody{
			Title: nameStr,
			Start: start,
		},
	}

	if frStr != "" {
		fr, err := time.ParseDuration(frStr)
		if err != nil {
			return fmt.Errorf("%w: could not parse duration: %s", ErrInvalidArg, err)
		}
		e.Duration = fr
	}
	if err := eventRepo.Store(e); err != nil {
		return fmt.Errorf("could not store event: %v", err)
	}

	localID, err := localIDRepo.Next()
	if err != nil {
		return fmt.Errorf("could not create next local id: %v", err)
	}
	if err := localIDRepo.Store(e.ID, localID); err != nil {
		return fmt.Errorf("could not store local id: %v", err)
	}

	it, err := e.Item()
	if err != nil {
		return fmt.Errorf("could not convert event to sync item: %v", err)
	}
	if err := syncRepo.Store(it); err != nil {
		return fmt.Errorf("could not store sync item: %v", err)
	}

	return nil
}