package ui

import (
	"strings"
	"testing"
)

func TestStatusBarDrawsItsHints(t *testing.T) {
	screen, root := newTestScreen(t, 40, 2)
	bar := NewStatusBar(
		StatusItem{Key: "F1", Label: "Help"},
		StatusItem{Key: "F2", Label: "Save"},
	)
	bar.SetBounds(Rect{X: 0, Y: 1, W: 40, H: 1})

	bar.Draw(root, testTheme(t))
	screen.Show()

	got := screenLines(t, screen)[1]
	if !strings.Contains(got, "F1 Help") || !strings.Contains(got, "F2 Save") {
		t.Errorf("the status bar is %q, want both hints", got)
	}
}

func TestAMessageReplacesTheHints(t *testing.T) {
	screen, root := newTestScreen(t, 40, 2)
	bar := NewStatusBar(StatusItem{Key: "F2", Label: "Save"})
	bar.SetBounds(Rect{X: 0, Y: 1, W: 40, H: 1})

	bar.SetMessage("File saved")
	bar.Draw(root, testTheme(t))
	screen.Show()

	got := screenLines(t, screen)[1]
	if !strings.Contains(got, "File saved") {
		t.Errorf("the status bar is %q, want the message", got)
	}
	if strings.Contains(got, "F2") {
		t.Errorf("the status bar is %q, want the hints hidden while a message shows", got)
	}
	if bar.Message() != "File saved" {
		t.Errorf("Message() = %q", bar.Message())
	}

	bar.SetMessage("")
	bar.Draw(root, testTheme(t))
	screen.Show()
	if !strings.Contains(screenLines(t, screen)[1], "F2") {
		t.Error("clearing the message did not bring the hints back")
	}
}

func TestExtraTextIsRightAligned(t *testing.T) {
	screen, root := newTestScreen(t, 40, 2)
	bar := NewStatusBar(StatusItem{Key: "F1", Label: "Help"})
	bar.SetBounds(Rect{X: 0, Y: 1, W: 40, H: 1})

	bar.SetExtra("12:5")
	bar.Draw(root, testTheme(t))
	screen.Show()

	got := screenLines(t, screen)[1]
	if !strings.HasSuffix(strings.TrimRight(got, " "), "12:5") {
		t.Errorf("the status bar is %q, want the extra text at the right", got)
	}
}

func TestClickingAHintRunsItsAction(t *testing.T) {
	ran := ""
	bar := NewStatusBar(
		StatusItem{Key: "F1", Label: "Help", Action: func() { ran = "help" }},
		StatusItem{Key: "F2", Label: "Save", Action: func() { ran = "save" }},
	)
	bar.SetBounds(Rect{X: 0, Y: 5, W: 40, H: 1})

	// "F1 Help" occupies columns 1..8, so "F2 Save" starts at 10.
	bar.HandleMouse(clickEvent(11, 5))

	if ran != "save" {
		t.Errorf("the action that ran was %q, want save", ran)
	}
}

func TestAClickOffTheStatusBarIsNotItsBusiness(t *testing.T) {
	bar := NewStatusBar(StatusItem{Key: "F1", Label: "Help", Action: func() {}})
	bar.SetBounds(Rect{X: 0, Y: 5, W: 40, H: 1})

	if bar.HandleMouse(clickEvent(3, 0)) {
		t.Error("the status bar claimed a click from another row")
	}
}

func TestClickingPastTheLastHintDoesNothing(t *testing.T) {
	ran := 0
	bar := NewStatusBar(StatusItem{Key: "F1", Label: "Help", Action: func() { ran++ }})
	bar.SetBounds(Rect{X: 0, Y: 5, W: 40, H: 1})

	bar.HandleMouse(clickEvent(35, 5))

	if ran != 0 {
		t.Error("a click on the empty part of the bar ran an action")
	}
}

func TestSetItemsReplacesTheHints(t *testing.T) {
	screen, root := newTestScreen(t, 40, 2)
	bar := NewStatusBar(StatusItem{Key: "F1", Label: "Help"})
	bar.SetBounds(Rect{X: 0, Y: 1, W: 40, H: 1})

	bar.SetItems(StatusItem{Key: "Esc", Label: "Cancel"})
	bar.Draw(root, testTheme(t))
	screen.Show()

	got := screenLines(t, screen)[1]
	if strings.Contains(got, "Help") || !strings.Contains(got, "Esc Cancel") {
		t.Errorf("the status bar is %q, want only the new hint", got)
	}
}