package ticket

// BoardList is a project-scoped view/filter over tickets by status.
type BoardList string

const (
	BoardAll        BoardList = "all"
	BoardBacklog    BoardList = "backlog"
	BoardInProgress BoardList = "in_progress"
	BoardDone       BoardList = "done"
)

// AllBoardLists is the ordered picker list.
var AllBoardLists = []BoardList{BoardAll, BoardBacklog, BoardInProgress, BoardDone}

// Label returns a display name for the board list.
func (b BoardList) Label() string {
	switch b {
	case BoardAll:
		return "All"
	case BoardBacklog:
		return "Backlog"
	case BoardInProgress:
		return "In Progress"
	case BoardDone:
		return "Done"
	default:
		return string(b)
	}
}

// Index returns the position in AllBoardLists.
func (b BoardList) Index() int {
	for i, bl := range AllBoardLists {
		if bl == b {
			return i
		}
	}
	return 0
}

// ParseBoardList validates a board list id; invalid values become BoardAll.
func ParseBoardList(s string) BoardList {
	b := BoardList(s)
	switch b {
	case BoardAll, BoardBacklog, BoardInProgress, BoardDone:
		return b
	default:
		return BoardAll
	}
}

// Matches reports whether a ticket belongs on this board list.
func (b BoardList) Matches(status Status) bool {
	switch b {
	case BoardAll:
		return true
	case BoardBacklog:
		return status == StatusTodo
	case BoardInProgress:
		return status == StatusInProgress
	case BoardDone:
		return status == StatusDone
	default:
		return true
	}
}

// DefaultStatus is the status used when creating a ticket on this list.
func (b BoardList) DefaultStatus() Status {
	switch b {
	case BoardInProgress:
		return StatusInProgress
	case BoardDone:
		return StatusDone
	default:
		return StatusTodo
	}
}