#include "document_test_helpers.hpp"
#include "pdfengine/pdf_document.hpp"
#include "pdfengine/edit_session.hpp"
#include <string>
#include <vector>

namespace pdfengine {

TEST(EditSessionTest, StartEditSessionAndBasics) {
    SKIP_IF_NO_PDFIUM();

    auto path = getCorpusPath("basic", "hello_world.pdf");
    if (!std::filesystem::exists(path)) {
        GTEST_SKIP() << "hello_world.pdf not found in corpus.";
    }

    auto docRes = PdfDocument::loadFromFile(path.string());
    ASSERT_TRUE(docRes.has_value());
    auto doc = *docRes;

    auto session = EditSession::StartEditSession(doc, 0, "para_1");
    ASSERT_NE(session, nullptr);

    // Initial Layout check (Mocked initial text: "Mock initial text for paragraph.")
    auto layout = session->GetLayoutView();
    EXPECT_FALSE(layout.lines.empty()); 
    EXPECT_FALSE(layout.glyphs.empty());

    // HitTest against mocked coordinates
    // We mocked columnLeft at 100.0, advance 6.0 per char
    // Char 0 at x=100.0
    int hit = session->HitTest(102.0, 700.0);
    EXPECT_EQ(hit, 0); // Closest to first cluster

    // Char 1 at x=106.0
    hit = session->HitTest(108.0, 700.0);
    EXPECT_EQ(hit, 1); // Closest to second cluster

    // GetCaretRect
    Rect caret0 = session->GetCaretRect(0);
    EXPECT_EQ(caret0.x, 100.0);
    EXPECT_EQ(caret0.y, 690.0); // 700 - 10(ascent)

    Rect caret1 = session->GetCaretRect(1);
    EXPECT_EQ(caret1.x, 106.0);

    // ApplyEdit sets dirty flag
    session->ApplyEdit("append:!");
    
    auto layout2 = session->GetLayoutView();
    EXPECT_GT(layout2.glyphs.size(), layout.glyphs.size()); // Appended '!'

    bool committed = session->CommitEdit();
    EXPECT_TRUE(committed);
}

} // namespace pdfengine