package ticket

import (
	"time"
	"unicode"
)

// Status represents the workflow state of a ticket.
type Status string

const (
	StatusTodo       Status = "todo"
	StatusInProgress Status = "in_progress"
	StatusDone       Status = "done"
)

// AllStatuses is the ordered list shown in the status picker.
var AllStatuses = []Status{StatusTodo, StatusInProgress, StatusDone}

// Label returns a short display label for the status.
func (s Status) Label() string {
	switch s {
	case StatusTodo:
		return "OPEN"
	case StatusInProgress:
		return "WIP"
	case StatusDone:
		return "DONE"
	default:
		return string(s)
	}
}

// Shortcut returns the status-menu hotkey (first letter of the label).
func (s Status) Shortcut() rune {
	label := s.Label()
	if label == "" {
		return 0
	}
	return unicode.ToLower([]rune(label)[0])
}

// Index returns the position in AllStatuses, or 0 if unknown.
func (s Status) Index() int {
	for i, st := range AllStatuses {
		if st == s {
			return i
		}
	}
	return 0
}

const (
	// SourceYouTrack marks tickets imported from YouTrack.
	SourceYouTrack = "youtrack"
)

// Ticket is the domain model for a work item.
// Title (headline) and Description are Markdown.
type Ticket struct {
	ID          string    `json:"id"`
	Title       string    `json:"title"`
	Description string    `json:"description,omitempty"`
	Status      Status    `json:"status"`
	ProjectID   string    `json:"projectId"`
	CreatedAt   time.Time `json:"createdAt"`
	UpdatedAt   time.Time `json:"updatedAt"`

	// External sync (optional). Local UUID stays in ID.
	Source      string    `json:"source,omitempty"`
	ExternalID  string    `json:"externalId,omitempty"`
	ExternalURL string    `json:"externalUrl,omitempty"`
	SyncedAt    time.Time `json:"syncedAt,omitempty"`
}