#include <XCEditor/Shell/UIEditorPanelRegistry.h>

#include <unordered_set>
#include <utility>

namespace XCEngine::UI::Editor {

namespace {

UIEditorPanelRegistryValidationResult MakeValidationError(
    UIEditorPanelRegistryValidationCode code,
    std::string message) {
    UIEditorPanelRegistryValidationResult result = {};
    result.code = code;
    result.message = std::move(message);
    return result;
}

} // namespace

UIEditorPanelRegistry BuildDefaultEditorShellPanelRegistry() {
    UIEditorPanelRegistry registry = {};
    registry.panels = {
        {
            "editor-foundation-root",
            "Root Surface",
            UIEditorPanelPresentationKind::Placeholder,
            true,
            false,
            false
        }
    };
    return registry;
}

const UIEditorPanelDescriptor* FindUIEditorPanelDescriptor(
    const UIEditorPanelRegistry& registry,
    std::string_view panelId) {
    for (const UIEditorPanelDescriptor& descriptor : registry.panels) {
        if (descriptor.panelId == panelId) {
            return &descriptor;
        }
    }

    return nullptr;
}

UIEditorPanelRegistryValidationResult ValidateUIEditorPanelRegistry(
    const UIEditorPanelRegistry& registry) {
    std::unordered_set<std::string> panelIds = {};
    for (const UIEditorPanelDescriptor& descriptor : registry.panels) {
        if (descriptor.panelId.empty()) {
            return MakeValidationError(
                UIEditorPanelRegistryValidationCode::EmptyPanelId,
                "Panel registry entry must define a panelId.");
        }

        if (descriptor.defaultTitle.empty()) {
            return MakeValidationError(
                UIEditorPanelRegistryValidationCode::EmptyDefaultTitle,
                "Panel descriptor '" + descriptor.panelId + "' must define a defaultTitle.");
        }

        if (!panelIds.insert(descriptor.panelId).second) {
            return MakeValidationError(
                UIEditorPanelRegistryValidationCode::DuplicatePanelId,
                "Panel descriptor '" + descriptor.panelId + "' is duplicated in the registry.");
        }
    }

    return {};
}

} // namespace XCEngine::UI::Editor