//go:build brlapi && cgo

package braille

import "testing"

func TestContractedWordWrapAndPartialSelection(t *testing.T) {
	v := viewport{width: 4}
	if err := v.setFrame(Frame{Text: "the cat", Cursor: -1, Contract: true,
		Table: "en-us-g2.ctb", WordWrap: true, Dots: []byte{0, 0x40, 0, 0, 0, 0, 0}}); err != nil {
		t.Fatal(err)
	}
	if v.frame() != "⠮⠀  " || v.displayDots()[0] != 0x40 {
		t.Fatalf("wrapped contraction=%q dots=%v", v.frame(), v.displayDots())
	}
	if _, ok := v.route(RouteBase + 2); ok {
		t.Fatal("padding cell was routed into undisplayed text")
	}
	if !v.pan(PanRight) || v.frame() != "⠉⠁⠞ " || v.offset != 2 {
		t.Fatalf("panned word=%q offset=%d", v.frame(), v.offset)
	}
	if !v.pan(PanLeft) || v.offset != 0 {
		t.Fatal("wrapped pan left did not restore its page")
	}
}

func TestContractionMapsCursorAndRouting(t *testing.T) {
	for _, cursor := range []int{-1, 0, 4, len([]rune("the cat"))} {
		v := viewport{width: 4}
		if err := v.setFrame(Frame{ID: 7, Text: "the cat", Cursor: cursor, Contract: true, Table: "en-us-g2.ctb"}); err != nil {
			t.Fatal(err)
		}
		if cursor == -1 && (string(v.text) != "⠮⠀⠉⠁⠞" || v.inputPositions[0] != 0 || v.inputPositions[1] != 3) {
			t.Fatalf("unexpected translation %q, positions %v", string(v.text), v.inputPositions)
		}
		if cursor == -1 {
			if event, ok := v.route(RouteBase + 1); !ok || event != (RoutingEvent{ID: 7, Offset: 3}) {
				t.Fatalf("contracted route = %+v, %v", event, ok)
			}
			if !v.pan(PanRight) {
				t.Fatal("contracted line did not pan")
			}
			if event, ok := v.route(RouteBase); !ok || event != (RoutingEvent{ID: 7, Offset: 6}) {
				t.Fatalf("panned contracted route = %+v, %v", event, ok)
			}
		}
		if len(v.text) >= len([]rune("the cat")) && cursor < 0 {
			t.Fatalf("text was not contracted: %q", string(v.text))
		}
		for cell, original := range v.inputPositions {
			if original < 0 || original > len([]rune("the cat")) {
				t.Fatalf("cell %d has invalid source offset %d", cell, original)
			}
		}
		if cursor == len([]rune("the cat")) && v.cursor != len(v.text)-1 {
			t.Fatalf("end cursor %d, text %q", v.cursor, string(v.text))
		}
	}
	if _, _, _, err := translate("the", "missing-table.ctb", -1, false); err == nil {
		t.Fatal("missing table accepted")
	}
	plain, _, _, err := translate("the cat", "en-us-g2.ctb", 0, false)
	if err != nil {
		t.Fatal(err)
	}
	expanded, _, _, err := translate("the cat", "en-us-g2.ctb", 0, true)
	if err != nil {
		t.Fatal(err)
	}
	if plain == expanded {
		t.Fatalf("computer braille at cursor did not expand word: %q", expanded)
	}
}