#include "EditorContext.h"

#include "Composition/EditorShellAssetBuilder.h"

#include <sstream>
#include <utility>

namespace XCEngine::UI::Editor::App {

namespace {

using ::XCEngine::UI::Editor::BuildEditorShellShortcutManager;

std::string ComposeStatusText(
    std::string_view status,
    std::string_view message) {
    if (status.empty()) {
        return std::string(message);
    }

    if (message.empty()) {
        return std::string(status);
    }

    return std::string(status) + ": " + std::string(message);
}

} // namespace

bool EditorContext::Initialize(const std::filesystem::path& repoRoot) {
    m_shellAsset = BuildEditorShellAsset(repoRoot);
    m_shellValidation = ValidateEditorShellAsset(m_shellAsset);
    if (!m_shellValidation.IsValid()) {
        return false;
    }

    m_session = {};
    m_session.repoRoot = repoRoot;
    m_session.projectRoot = (repoRoot / "project").lexically_normal();
    m_hostCommandBridge.BindSession(m_session);
    m_shortcutManager = BuildEditorShellShortcutManager(m_shellAsset);
    m_shortcutManager.SetHostCommandHandler(&m_hostCommandBridge);
    m_shellServices = {};
    m_shellServices.commandDispatcher = &m_shortcutManager.GetCommandDispatcher();
    m_shellServices.shortcutManager = &m_shortcutManager;
    SetReadyStatus();
    return true;
}

void EditorContext::AttachTextMeasurer(
    const UIEditorTextMeasurer& textMeasurer) {
    m_shellServices.textMeasurer = &textMeasurer;
}

void EditorContext::SetExitRequestHandler(std::function<void()> handler) {
    m_hostCommandBridge.SetExitRequestHandler(std::move(handler));
}

void EditorContext::SyncSessionFromWorkspace(
    const UIEditorWorkspaceController& workspaceController) {
    SyncEditorSessionFromWorkspace(m_session, workspaceController);
}

bool EditorContext::IsValid() const {
    return m_shellValidation.IsValid();
}

const std::string& EditorContext::GetValidationMessage() const {
    return m_shellValidation.message;
}

const EditorShellAsset& EditorContext::GetShellAsset() const {
    return m_shellAsset;
}

const EditorSession& EditorContext::GetSession() const {
    return m_session;
}

void EditorContext::SetSelection(EditorSelectionState selection) {
    m_session.selection = std::move(selection);
}

void EditorContext::ClearSelection() {
    m_session.selection = {};
}

UIEditorWorkspaceController EditorContext::BuildWorkspaceController() const {
    return UIEditorWorkspaceController(
        m_shellAsset.panelRegistry,
        m_shellAsset.workspace,
        m_shellAsset.workspaceSession);
}

const UIEditorShellInteractionServices& EditorContext::GetShellServices() const {
    return m_shellServices;
}

UIEditorShellInteractionDefinition EditorContext::BuildShellDefinition(
    const UIEditorWorkspaceController& workspaceController,
    std::string_view captureText,
    EditorShellVariant variant) const {
    return BuildEditorShellInteractionDefinition(
        m_shellAsset,
        workspaceController,
        ComposeStatusText(m_lastStatus, m_lastMessage),
        captureText,
        variant);
}

std::string EditorContext::DescribeWorkspaceState(
    const UIEditorWorkspaceController& workspaceController,
    const UIEditorShellInteractionState& interactionState) const {
    std::ostringstream stream = {};
    stream << "active=" << workspaceController.GetWorkspace().activePanelId;
    const auto visiblePanels =
        CollectUIEditorWorkspaceVisiblePanels(
            workspaceController.GetWorkspace(),
            workspaceController.GetSession());
    stream << " visible=[";
    for (std::size_t index = 0; index < visiblePanels.size(); ++index) {
        if (index > 0u) {
            stream << ',';
        }
        stream << visiblePanels[index].panelId;
    }
    stream << ']';

    const auto& dockState =
        interactionState.workspaceInteractionState.dockHostInteractionState;
    stream << " dragNode=" << dockState.activeTabDragNodeId;
    stream << " dragPanel=" << dockState.activeTabDragPanelId;
    if (dockState.dockHostState.dropPreview.visible) {
        stream << " dropTarget=" << dockState.dockHostState.dropPreview.targetNodeId;
    }
    return stream.str();
}

} // namespace XCEngine::UI::Editor::App