// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package ocr

import "testing"

func TestCursorUnicodeLinesAndEngineWordOrder(t *testing.T) {
	result := Result{Text: "é e\u0301\n\nאב 42", Words: []Word{
		{Text: "é", Span: Span{0, 1}}, {Text: "e\u0301", Span: Span{2, 4}},
		{Text: "אב", Span: Span{6, 8}}, {Text: "42", Span: Span{9, 11}},
	}}
	cursor := NewCursor(result)
	if got := cursor.Current(LineUnit); got.Text != "é e\u0301" || got.Offset != 0 || got.Cursor != 0 {
		t.Fatalf("initial: %+v", got)
	}
	if got := cursor.Move(WordUnit, 1); got.Text != "e\u0301" || got.Offset != 2 || got.Cursor != 2 {
		t.Fatalf("combining word: %+v", got)
	}
	if got := cursor.Move(Character, 1); got.Text != "\u0301" || got.Offset != 3 {
		t.Fatalf("combining character: %+v", got)
	}
	if got := cursor.Move(LineUnit, 1); got.Text != "" || got.Offset != 5 || got.Cursor != 0 {
		t.Fatalf("blank paragraph: %+v", got)
	}
	if got := cursor.Move(LineUnit, 1); got.Text != "אב 42" || got.Offset != 9 || got.Cursor != 3 {
		t.Fatalf("preserved column: %+v", got)
	}
	if got := cursor.Move(WordUnit, -1); got.Text != "אב" || got.Offset != 6 {
		t.Fatalf("RTL engine order: %+v", got)
	}
	if got := cursor.Move(DocumentEnd, 0); got.Offset != 11 || got.Cursor != 5 || got.Text != "אב 42" {
		t.Fatalf("end: %+v", got)
	}
	if got := cursor.Move(Character, 1); got.Moved || got.Offset != 11 {
		t.Fatalf("past end: %+v", got)
	}
	cursor.Move(DocumentStart, 0)
	if got := cursor.Move(Character, -1); got.Moved || got.Offset != 0 {
		t.Fatalf("before start: %+v", got)
	}
}

func TestCursorLineEndsSeparatorsAndEmptyDocument(t *testing.T) {
	cursor := NewCursor(Result{Text: "one\ntwo\n"})
	if got := cursor.Move(LineEnd, 0); got.Offset != 3 || got.Text != "\n" || got.Cursor != 3 {
		t.Fatalf("line end: %+v", got)
	}
	if got := cursor.Move(Character, 1); got.Offset != 4 || got.Text != "t" || got.Line != "two" || got.Cursor != 0 {
		t.Fatalf("cross separator: %+v", got)
	}
	if got := cursor.Move(DocumentEnd, 0); got.Offset != 8 || got.Line != "" || got.Cursor != 0 {
		t.Fatalf("trailing blank: %+v", got)
	}
	if got := NewCursor(Result{}).Move(Character, 1); got.Offset != 0 || got.Text != "" || got.Moved {
		t.Fatalf("empty: %+v", got)
	}
}