using Aisu.SIM1.Face.Core;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Aisu.SIM1.Face.UI.Common
{
    /// <summary>
    /// Demo 场景运行时构建器。
    /// </summary>
    public sealed class FaceModuleDemoBootstrap : MonoBehaviour
    {
        #region Unity API

        /// <summary>
        /// 执行 Awake 方法。
        /// </summary>
        private void Awake()
        {
            Build();
        }

        #endregion

        /// <summary>
        /// 构建完整 UGUI 页面。
        /// </summary>
        public void Build()
        {
            if (FindObjectOfType<EventSystem>() == null)
            {
                var eventSystem = new GameObject("EventSystem");
                eventSystem.AddComponent<EventSystem>();
                eventSystem.AddComponent<StandaloneInputModule>();
            }

            var font = Resources.GetBuiltinResource<Font>("Arial.ttf");
            var builder = new FaceModuleUiBuilder(font);
            var manager = FindObjectOfType<FaceModuleManager>() ?? new GameObject("FaceModuleManager").AddComponent<FaceModuleManager>();

            var canvasGo = FaceModuleUiBuilder.Create("Canvas", transform);
            var canvas = canvasGo.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            canvasGo.AddComponent<GraphicRaycaster>();
            var scaler = canvasGo.AddComponent<CanvasScaler>();
            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            scaler.referenceResolution = new Vector2(1920, 1080);

            var safe = FaceModuleUiBuilder.Create("SafeArea", canvasGo.transform);
            FaceModuleUiBuilder.Stretch(safe.GetComponent<RectTransform>());
            var safeLayout = safe.AddComponent<VerticalLayoutGroup>();
            safeLayout.padding = new RectOffset(16, 16, 16, 16);
            safeLayout.spacing = 12;
            safeLayout.childControlWidth = true;
            safeLayout.childForceExpandWidth = true;

            var top = FaceModuleUiBuilder.Create("TopStatusBar", safe.transform);
            top.AddComponent<Image>().color = new Color(0.9f, 0.94f, 0.97f);
            var topLayoutElement = top.AddComponent<LayoutElement>();
            topLayoutElement.preferredHeight = 54;
            var topLayout = top.AddComponent<HorizontalLayoutGroup>();
            topLayout.padding = new RectOffset(12, 12, 8, 8);
            topLayout.spacing = 20;
            var statusBar = top.AddComponent<FaceModuleStatusBar>();
            statusBar.Bind(
                builder.Text(top.transform, "未连接", 20),
                builder.Text(top.transform, "未 READY", 20),
                builder.Text(top.transform, "状态: Invalid", 20),
                builder.Text(top.transform, "命令:", 20),
                builder.Text(top.transform, "错误:", 20));

            var body = FaceModuleUiBuilder.Create("Body", safe.transform);
            var bodyLayoutElement = body.AddComponent<LayoutElement>();
            bodyLayoutElement.flexibleHeight = 1;
            var bodyLayout = body.AddComponent<HorizontalLayoutGroup>();
            bodyLayout.spacing = 12;
            bodyLayout.childControlHeight = true;
            bodyLayout.childForceExpandHeight = true;

            var navigation = FaceModuleUiBuilder.Create("NavigationPanel", body.transform).AddComponent<FaceModuleNavigationPanel>();
            navigation.gameObject.AddComponent<Image>().color = new Color(0.86f, 0.9f, 0.94f);
            var navLayoutElement = navigation.gameObject.AddComponent<LayoutElement>();
            navLayoutElement.preferredWidth = 240;
            var navLayout = navigation.gameObject.AddComponent<VerticalLayoutGroup>();
            navLayout.padding = new RectOffset(10, 10, 10, 10);
            navLayout.spacing = 8;

            var pageContainer = FaceModuleUiBuilder.Create("PageContainer", body.transform);
            pageContainer.AddComponent<Image>().color = new Color(0.98f, 0.99f, 1f);
            pageContainer.AddComponent<LayoutElement>().flexibleWidth = 1;

            var bottom = FaceModuleUiBuilder.Create("BottomLogPanel", safe.transform);
            bottom.AddComponent<Image>().color = new Color(0.08f, 0.09f, 0.1f);
            bottom.AddComponent<LayoutElement>().preferredHeight = 220;
            var bottomLayout = bottom.AddComponent<VerticalLayoutGroup>();
            bottomLayout.padding = new RectOffset(8, 8, 8, 8);
            bottomLayout.spacing = 6;
            var logPanel = bottom.AddComponent<FaceModuleLogPanel>();
            var autoScroll = builder.Toggle(bottom.transform, "自动滚动", true);
            var scroll = builder.ScrollView(bottom.transform, out var logText);
            logText.color = Color.white;
            logPanel.Bind(logText, scroll, autoScroll);
            var logButtons = builder.Row(bottom.transform);
            builder.Button(logButtons.transform, "清空日志", logPanel.Clear);
            builder.Button(logButtons.transform, "保存日志", logPanel.Save);

            var loadingGo = FaceModuleUiBuilder.Create("LoadingView", canvasGo.transform);
            loadingGo.AddComponent<Image>().color = new Color(0, 0, 0, 0.25f);
            FaceModuleUiBuilder.Stretch(loadingGo.GetComponent<RectTransform>());
            var loadingLayout = loadingGo.AddComponent<VerticalLayoutGroup>();
            loadingLayout.childAlignment = TextAnchor.MiddleCenter;
            var loading = loadingGo.AddComponent<FaceModuleLoadingView>();
            loading.Bind(builder.Text(loadingGo.transform, "处理中...", 28, TextAnchor.MiddleCenter), builder.Slider(loadingGo.transform));

            var dialogGo = FaceModuleUiBuilder.Create("ConfirmDialog", canvasGo.transform);
            dialogGo.AddComponent<Image>().color = new Color(0, 0, 0, 0.35f);
            FaceModuleUiBuilder.Stretch(dialogGo.GetComponent<RectTransform>());
            var dialogLayout = dialogGo.AddComponent<VerticalLayoutGroup>();
            dialogLayout.childAlignment = TextAnchor.MiddleCenter;
            dialogLayout.spacing = 12;
            var dialog = dialogGo.AddComponent<FaceModuleConfirmDialog>();
            var dialogText = builder.Text(dialogGo.transform, "确认操作？", 26, TextAnchor.MiddleCenter);
            var dialogButtons = builder.Row(dialogGo.transform);
            var confirmButton = builder.Button(dialogButtons.transform, "确认", () => { });
            var cancelButton = builder.Button(dialogButtons.transform, "取消", () => { });
            dialog.Bind(dialogText, confirmButton, cancelButton);

            var mainPanel = canvasGo.AddComponent<FaceModuleMainPanel>();
            mainPanel.Bind(statusBar, navigation, logPanel, loading);

            BuildPages(pageContainer.transform, builder, mainPanel);
            mainPanel.Init(manager);
            mainPanel.ShowPage("Connect");
        }

        /// <summary>
        /// 构建 Demo 功能页面。
        /// </summary>
        private void BuildPages(Transform pageContainer, FaceModuleUiBuilder builder, FaceModuleMainPanel mainPanel)
        {
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceConnectPage>(pageContainer, builder, mainPanel, "Connect", "连接");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceProtocolDebugPage>(pageContainer, builder, mainPanel, "ProtocolDebug", "协议调试");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceVerifyPage>(pageContainer, builder, mainPanel, "Verify", "人脸验证");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceEnrollPage>(pageContainer, builder, mainPanel, "Enroll", "人脸录入");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceUserManagePage>(pageContainer, builder, mainPanel, "UserManage", "用户管理");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceQrCodePage>(pageContainer, builder, mainPanel, "QrCode", "二维码");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceImagePage>(pageContainer, builder, mainPanel, "Image", "图片抓拍");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FacePhotoEnrollPage>(pageContainer, builder, mainPanel, "PhotoEnroll", "照片注册");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceFeaturePage>(pageContainer, builder, mainPanel, "Feature", "特征管理");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceUvcSettingsPage>(pageContainer, builder, mainPanel, "Uvc", "UVC 设置");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceAdvancedSettingsPage>(pageContainer, builder, mainPanel, "Advanced", "高级设置");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceEncryptionPage>(pageContainer, builder, mainPanel, "Encryption", "加密");
            AddPage<global::Aisu.SIM1.Face.UI.Pages.FaceFirmwarePage>(pageContainer, builder, mainPanel, "Firmware", "固件升级");
        }

        /// <summary>
        /// 添加 Demo 功能页面。
        /// </summary>
        private void AddPage<T>(Transform parent, FaceModuleUiBuilder builder, FaceModuleMainPanel mainPanel, string pageName, string label) where T : FaceModulePageBase
        {
            var pageGo = FaceModuleUiBuilder.Create(pageName + "Page", parent);
            FaceModuleUiBuilder.Stretch(pageGo.GetComponent<RectTransform>());
            var layout = pageGo.AddComponent<VerticalLayoutGroup>();
            layout.padding = new RectOffset(16, 16, 16, 16);
            layout.spacing = 10;
            layout.childControlWidth = true;
            layout.childForceExpandWidth = true;
            var page = pageGo.AddComponent<T>();
            page.Build(builder);
            mainPanel.RegisterPage(pageName, label, page, builder);
        }
    }
}