#include <gtest/gtest.h>

#include "XCUIBackend/NullXCUIPanelCanvasHost.h"

namespace {

using XCEngine::Editor::XCUIBackend::CreateNullXCUIPanelCanvasHost;
using XCEngine::Editor::XCUIBackend::BuildPassiveXCUIPanelCanvasSession;
using XCEngine::Editor::XCUIBackend::IXCUIPanelCanvasHost;
using XCEngine::Editor::XCUIBackend::ResolveXCUIPanelCanvasChildId;
using XCEngine::Editor::XCUIBackend::XCUIPanelCanvasRequest;
using XCEngine::Editor::XCUIBackend::XCUIPanelCanvasSession;

TEST(NewEditorXCUIPanelCanvasHostTest, NullHostProvidesStableDebugNameAndSafePassiveSessions) {
    std::unique_ptr<IXCUIPanelCanvasHost> host = CreateNullXCUIPanelCanvasHost();
    ASSERT_NE(host, nullptr);

    EXPECT_STREQ(host->GetDebugName(), "NullXCUIPanelCanvasHost");

    const XCUIPanelCanvasSession session = host->BeginCanvas({});
    EXPECT_FALSE(session.validCanvas);
    EXPECT_FALSE(session.hovered);
    EXPECT_FALSE(session.windowFocused);
    EXPECT_FLOAT_EQ(session.hostRect.width, 0.0f);
    EXPECT_FLOAT_EQ(session.hostRect.height, 0.0f);
    host->EndCanvas();
}

TEST(NewEditorXCUIPanelCanvasHostTest, ResolveChildIdFallsBackToStableDefaultForMissingNames) {
    XCUIPanelCanvasRequest request = {};
    EXPECT_STREQ(ResolveXCUIPanelCanvasChildId(request), "XCUIPanelCanvasHost");
    EXPECT_STREQ(ResolveXCUIPanelCanvasChildId(request, "FallbackCanvas"), "FallbackCanvas");

    request.childId = "";
    EXPECT_STREQ(ResolveXCUIPanelCanvasChildId(request), "XCUIPanelCanvasHost");

    request.childId = "CanvasHost";
    EXPECT_STREQ(ResolveXCUIPanelCanvasChildId(request, "FallbackCanvas"), "CanvasHost");
}

TEST(NewEditorXCUIPanelCanvasHostTest, PassiveSessionClampsRequestGeometryIntoSafeDefaultState) {
    XCUIPanelCanvasRequest request = {};
    request.height = -18.0f;
    request.topInset = 42.0f;

    XCUIPanelCanvasSession session = BuildPassiveXCUIPanelCanvasSession(request);
    EXPECT_FALSE(session.validCanvas);
    EXPECT_FALSE(session.hovered);
    EXPECT_FALSE(session.windowFocused);
    EXPECT_FLOAT_EQ(session.hostRect.width, 0.0f);
    EXPECT_FLOAT_EQ(session.hostRect.height, 0.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.y, 0.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.height, 0.0f);

    request.height = 120.0f;
    request.topInset = 180.0f;
    session = BuildPassiveXCUIPanelCanvasSession(request);
    EXPECT_FLOAT_EQ(session.hostRect.height, 120.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.y, 120.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.height, 0.0f);
}

TEST(NewEditorXCUIPanelCanvasHostTest, NullHostBeginCanvasReturnsSafePassiveSessionAndDrawCallsAreNoops) {
    std::unique_ptr<IXCUIPanelCanvasHost> host = CreateNullXCUIPanelCanvasHost();
    ASSERT_NE(host, nullptr);

    XCUIPanelCanvasRequest request = {};
    request.childId = "NullCanvas";
    request.height = 280.0f;
    request.topInset = 24.0f;
    request.bordered = true;
    request.showSurfaceImage = true;
    request.drawPreviewFrame = true;
    request.placeholderTitle = "Placeholder";
    request.badgeTitle = "Badge";

    const XCUIPanelCanvasSession session = host->BeginCanvas(request);
    EXPECT_FALSE(session.validCanvas);
    EXPECT_FALSE(session.hovered);
    EXPECT_FALSE(session.windowFocused);
    EXPECT_FLOAT_EQ(session.hostRect.width, 0.0f);
    EXPECT_FLOAT_EQ(session.hostRect.height, 280.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.width, 0.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.y, 24.0f);
    EXPECT_FLOAT_EQ(session.canvasRect.height, 256.0f);
    EXPECT_FLOAT_EQ(session.pointerPosition.x, 0.0f);
    EXPECT_FLOAT_EQ(session.pointerPosition.y, 0.0f);

    host->DrawFilledRect(
        XCEngine::UI::UIRect(10.0f, 12.0f, 48.0f, 64.0f),
        XCEngine::UI::UIColor(1.0f, 0.0f, 0.0f, 1.0f),
        6.0f);
    host->DrawOutlineRect(
        XCEngine::UI::UIRect(5.0f, 6.0f, 100.0f, 40.0f),
        XCEngine::UI::UIColor(0.0f, 1.0f, 0.0f, 1.0f),
        2.0f,
        8.0f);
    host->DrawText(
        XCEngine::UI::UIPoint(8.0f, 14.0f),
        "Null host should ignore text draws",
        XCEngine::UI::UIColor(1.0f, 1.0f, 1.0f, 1.0f),
        16.0f);
    host->EndCanvas();

    const XCUIPanelCanvasSession secondSession = host->BeginCanvas({});
    EXPECT_FLOAT_EQ(secondSession.hostRect.height, 0.0f);
    EXPECT_FLOAT_EQ(secondSession.canvasRect.height, 0.0f);
    host->EndCanvas();
}

} // namespace