import { useState, useEffect, forwardRef, useImperativeHandle } from 'react';
import { useNavigate } from 'react-router-dom';
import { ExtensionCardVO, ExtensionType } from './ExtensionCardVO';
import ExtensionCardComponent from './ExtensionCardComponent';
import styles from '@/app/home/plugins/plugins.module.css';
import { httpClient } from '@/app/infra/http/HttpClient';
import { getCloudServiceClientSync } from '@/app/infra/http';
import { isNewerVersion } from '@/app/utils/versionCompare';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
  DialogFooter,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Checkbox } from '@/components/ui/checkbox';
import { useTranslation } from 'react-i18next';
import { extractI18nObject } from '@/i18n/I18nProvider';
import { toast } from 'sonner';
import { useAsyncTask, AsyncTaskStatus } from '@/hooks/useAsyncTask';
import { useSidebarData } from '@/app/home/components/home-sidebar/SidebarDataContext';
import { Loader2, Puzzle, Search, Server, Sparkles } from 'lucide-react';
import {
  pluginTaskKey,
  usePluginInstallTasks,
} from '@/app/home/plugins/components/plugin-install-task';

export interface PluginInstalledComponentRef {
  refreshPluginList: () => void;
}

enum ExtensionOperationType {
  DELETE = 'DELETE',
  UPDATE = 'UPDATE',
}

export type FilterType = 'all' | ExtensionType;

export const FilterOptions = [
  {
    value: 'all' as FilterType,
    labelKey: 'market.filters.allFormats',
    icon: null,
  },
  {
    value: 'plugin' as FilterType,
    labelKey: 'market.typePlugin',
    icon: Puzzle,
  },
  {
    value: 'mcp' as FilterType,
    labelKey: 'market.typeMCP',
    icon: Server,
  },
  {
    value: 'skill' as FilterType,
    labelKey: 'market.typeSkill',
    icon: Sparkles,
  },
];

interface PluginInstalledComponentProps {
  filterType: FilterType;
  groupByType: boolean;
  /** Free-text filter over label / name / author / description. */
  searchQuery?: string;
  /** Invoked when the user clears the search from the empty state. */
  onClearSearch?: () => void;
}

const PluginInstalledComponent = forwardRef<
  PluginInstalledComponentRef,
  PluginInstalledComponentProps
>(({ filterType, groupByType, searchQuery = '', onClearSearch }, ref) => {
  const { t } = useTranslation();
  const navigate = useNavigate();
  const { addTask, setSelectedTaskId } = usePluginInstallTasks();
  const { refreshPlugins, refreshMCPServers, refreshSkills } = useSidebarData();
  const [extensionList, setExtensionList] = useState<ExtensionCardVO[]>([]);
  const [loading, setLoading] = useState<boolean>(true);
  const [showOperationModal, setShowOperationModal] = useState(false);
  const [operationType, setOperationType] = useState<ExtensionOperationType>(
    ExtensionOperationType.DELETE,
  );
  const [targetExtension, setTargetExtension] =
    useState<ExtensionCardVO | null>(null);
  const [deleteData, setDeleteData] = useState<boolean>(false);

  const asyncTask = useAsyncTask({
    onSuccess: () => {
      toast.success(t('plugins.deleteSuccess'));
      setShowOperationModal(false);
      getExtensionList();
      refreshPlugins();
      refreshMCPServers();
      refreshSkills();
    },
    onError: () => {},
  });

  useEffect(() => {
    initData();
  }, []);

  function initData() {
    getExtensionList();
  }

  async function getExtensionList(silent = false) {
    if (!silent) setLoading(true);
    try {
      const client = getCloudServiceClientSync();

      const [extensionsResp, marketplaceResp] = await Promise.all([
        httpClient.getExtensions().catch(() => ({ extensions: [] })),
        client.getMarketplacePlugins(1, 100).catch(() => ({ plugins: [] })),
      ]);

      const marketplacePluginMap = new Map<string, any>();
      marketplaceResp.plugins.forEach((plugin: any) => {
        const key = `${plugin.author}/${plugin.name}`;
        marketplacePluginMap.set(key, plugin);
      });

      const extensions: ExtensionCardVO[] = [];

      for (const item of extensionsResp.extensions) {
        if (item.type === 'plugin') {
          const plugin = item.plugin;
          const meta = plugin.manifest.manifest.metadata;
          const author = meta.author ?? '';
          const name = meta.name;
          const marketplaceKey = `${author}/${name}`;
          const marketplacePlugin = marketplacePluginMap.get(marketplaceKey);

          let hasUpdate = false;
          if (plugin.install_source === 'marketplace' && marketplacePlugin) {
            if (marketplacePlugin.latest_version) {
              hasUpdate = isNewerVersion(
                marketplacePlugin.latest_version,
                meta.version ?? '',
              );
            }
          }

          extensions.push(
            new ExtensionCardVO({
              id: marketplaceKey,
              author,
              label: extractI18nObject(meta.label) || name,
              name,
              description: extractI18nObject(
                meta.description ?? { en_US: '', zh_Hans: '' },
              ),
              version: meta.version ?? '',
              enabled: plugin.enabled,
              type: marketplacePlugin?.type || 'plugin',
              // Icon is resolved by ExtensionCardComponent through the shared
              // installed-plugin hook (authenticated fetch in multi-Workspace
              // deployments); the public /icon route 404s there.
              install_source: plugin.install_source,
              install_info: plugin.install_info,
              status: plugin.status,
              debug: plugin.debug,
              hasUpdate,
            }),
          );
        } else if (item.type === 'mcp') {
          const server = item.server;
          extensions.push(
            new ExtensionCardVO({
              id: server.name,
              author: '',
              label: server.name.replace(/__/g, '/'),
              name: server.name,
              description: '',
              version: '',
              enabled: server.enable,
              type: 'mcp',
              iconURL: httpClient.getPluginIconURL('mcp', server.name),
              status: server.runtime_info?.status,
              runtimeStatus: server.runtime_info?.status,
              tools: server.runtime_info?.tool_count || 0,
              mode: server.mode,
            }),
          );
        } else if (item.type === 'skill') {
          const skill = item.skill;
          extensions.push(
            new ExtensionCardVO({
              id: skill.name,
              author: '',
              label: skill.display_name || skill.name,
              name: skill.name,
              description: skill.description || '',
              version: '',
              enabled: true,
              type: 'skill',
              iconURL: httpClient.getPluginIconURL('skill', skill.name),
            }),
          );
        }
      }

      setExtensionList(extensions);
    } catch (error) {
      console.error('Failed to fetch extension list:', error);
      if (!silent) setExtensionList([]);
    } finally {
      if (!silent) setLoading(false);
    }
  }

  // While any MCP server is still connecting, poll quietly so the status badge
  // transitions (connecting -> connected/error) without a manual refresh.
  useEffect(() => {
    const hasConnecting = extensionList.some(
      (e) => e.type === 'mcp' && e.enabled && e.runtimeStatus === 'connecting',
    );
    if (!hasConnecting) return;
    const timer = setInterval(() => {
      getExtensionList(true);
    }, 3000);
    return () => clearInterval(timer);
  }, [extensionList]);

  useImperativeHandle(ref, () => ({
    refreshPluginList: getExtensionList,
  }));

  function handleExtensionClick(extension: ExtensionCardVO) {
    if (extension.type === 'mcp') {
      navigate(`/home/mcp?id=${encodeURIComponent(extension.id)}`);
    } else if (extension.type === 'skill') {
      navigate(`/home/skills?id=${encodeURIComponent(extension.id)}`);
    } else {
      const extensionId = `${extension.author}/${extension.name}`;
      navigate(`/home/extensions?id=${encodeURIComponent(extensionId)}`);
    }
  }

  function handleExtensionDelete(extension: ExtensionCardVO) {
    setTargetExtension(extension);
    setOperationType(ExtensionOperationType.DELETE);
    setShowOperationModal(true);
    setDeleteData(false);
    asyncTask.reset();
  }

  function handleExtensionUpdate(extension: ExtensionCardVO) {
    setTargetExtension(extension);
    setOperationType(ExtensionOperationType.UPDATE);
    setShowOperationModal(true);
    asyncTask.reset();
  }

  function executeOperation() {
    if (!targetExtension) return;

    if (targetExtension.type === 'mcp') {
      httpClient
        .deleteMCPServer(targetExtension.name)
        .then(() => {
          toast.success(t('mcp.deleteSuccess'));
          setShowOperationModal(false);
          getExtensionList();
          refreshMCPServers();
        })
        .catch((error) => {
          toast.error(t('mcp.deleteError') + error.message);
        });
      return;
    }

    if (targetExtension.type === 'skill') {
      httpClient
        .deleteSkill(targetExtension.name)
        .then(() => {
          toast.success(t('skills.deleteSuccess'));
          setShowOperationModal(false);
          getExtensionList();
          refreshSkills();
        })
        .catch((error) => {
          toast.error(t('skills.deleteError') + error.message);
        });
      return;
    }

    if (operationType === ExtensionOperationType.UPDATE) {
      httpClient
        .upgradePlugin(targetExtension.author, targetExtension.name)
        .then((res) => {
          addTask({
            taskId: res.task_id,
            pluginName: `${targetExtension.author}/${targetExtension.name}`,
            source: 'marketplace',
            extensionType: 'plugin',
            operation: 'upgrade',
          });
          setSelectedTaskId(
            pluginTaskKey(res.task_id, 'marketplace', 'upgrade'),
          );
          setShowOperationModal(false);
          setTargetExtension(null);
          asyncTask.reset();
        })
        .catch((error) => {
          toast.error(t('plugins.updateError') + error.message);
        });
      return;
    }

    httpClient
      .removePlugin(targetExtension.author, targetExtension.name, deleteData)
      .then((res) => {
        asyncTask.startTask(res.task_id);
      })
      .catch((error) => {
        toast.error(t('plugins.deleteError') + error.message);
      });
  }

  // Match the query against the fields a user can actually see on the card
  // (label / name / author) plus the description, case-insensitively.
  const normalizedQuery = searchQuery.trim().toLowerCase();
  const filteredExtensions = extensionList.filter((ext) => {
    if (filterType !== 'all' && ext.type !== filterType) return false;
    if (!normalizedQuery) return true;
    return [ext.label, ext.name, ext.author, ext.description].some((field) =>
      (field || '').toLowerCase().includes(normalizedQuery),
    );
  });

  const clearSearch = () => {
    onClearSearch?.();
  };

  const showGrouped = groupByType && filterType === 'all';
  const groupOrder: ExtensionType[] = ['plugin', 'mcp', 'skill'];
  const groupedExtensions = groupOrder
    .map((type) => ({
      type,
      labelKey: FilterOptions.find((o) => o.value === type)!.labelKey,
      items: filteredExtensions.filter((ext) => ext.type === type),
    }))
    .filter((g) => g.items.length > 0);

  const getDeleteConfirmMessage = () => {
    if (!targetExtension) return '';
    if (targetExtension.type === 'mcp') {
      return t('mcp.confirmDeleteServer');
    }
    if (targetExtension.type === 'skill') {
      return t('skills.deleteConfirmation');
    }
    return t('plugins.confirmDeletePlugin', {
      author: targetExtension.author,
      name: targetExtension.name,
    });
  };

  return (
    <>
      <Dialog
        open={showOperationModal}
        onOpenChange={(open) => {
          if (!open) {
            setShowOperationModal(false);
            setTargetExtension(null);
            asyncTask.reset();
          }
        }}
      >
        <DialogContent>
          <DialogHeader>
            <DialogTitle>
              {operationType === ExtensionOperationType.DELETE
                ? t('plugins.deleteConfirm')
                : t('plugins.updateConfirm')}
            </DialogTitle>
          </DialogHeader>
          <DialogDescription>
            {asyncTask.status === AsyncTaskStatus.WAIT_INPUT && (
              <div className="flex flex-col gap-4">
                <div>{getDeleteConfirmMessage()}</div>
                {operationType === ExtensionOperationType.DELETE &&
                  targetExtension?.type === 'plugin' && (
                    <div className="flex items-center space-x-2">
                      <Checkbox
                        id="delete-data"
                        checked={deleteData}
                        onCheckedChange={(checked) =>
                          setDeleteData(checked === true)
                        }
                      />
                      <label
                        htmlFor="delete-data"
                        className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70 cursor-pointer"
                      >
                        {t('plugins.deleteDataCheckbox')}
                      </label>
                    </div>
                  )}
              </div>
            )}
            {asyncTask.status === AsyncTaskStatus.RUNNING && (
              <div>
                {operationType === ExtensionOperationType.DELETE
                  ? t('plugins.deleting')
                  : t('plugins.updating')}
              </div>
            )}
            {asyncTask.status === AsyncTaskStatus.ERROR && (
              <div>
                {operationType === ExtensionOperationType.DELETE
                  ? t('plugins.deleteError')
                  : t('plugins.updateError')}
                <div className="text-red-500">{asyncTask.error}</div>
              </div>
            )}
          </DialogDescription>
          <DialogFooter>
            {asyncTask.status === AsyncTaskStatus.WAIT_INPUT && (
              <Button
                variant="outline"
                onClick={() => {
                  setShowOperationModal(false);
                  setTargetExtension(null);
                  asyncTask.reset();
                }}
              >
                {t('plugins.cancel')}
              </Button>
            )}
            {asyncTask.status === AsyncTaskStatus.WAIT_INPUT && (
              <Button
                variant={
                  operationType === ExtensionOperationType.DELETE
                    ? 'destructive'
                    : 'default'
                }
                onClick={() => {
                  executeOperation();
                }}
              >
                {operationType === ExtensionOperationType.DELETE
                  ? t('plugins.confirmDelete')
                  : t('plugins.confirmUpdate')}
              </Button>
            )}
            {asyncTask.status === AsyncTaskStatus.RUNNING && (
              <Button
                variant={
                  operationType === ExtensionOperationType.DELETE
                    ? 'destructive'
                    : 'default'
                }
                disabled
              >
                {operationType === ExtensionOperationType.DELETE
                  ? t('plugins.deleting')
                  : t('plugins.updating')}
              </Button>
            )}
            {asyncTask.status === AsyncTaskStatus.ERROR && (
              <Button
                variant="default"
                onClick={() => {
                  setShowOperationModal(false);
                  asyncTask.reset();
                }}
              >
                {t('plugins.close')}
              </Button>
            )}
          </DialogFooter>
        </DialogContent>
      </Dialog>

      {loading ? (
        <div className="flex flex-col items-center justify-center text-muted-foreground min-h-[60vh] w-full gap-2">
          <Loader2 className="h-[3rem] w-[3rem] animate-spin" />
          <div className="text-lg mb-2">{t('plugins.loadingExtensions')}</div>
        </div>
      ) : filteredExtensions.length === 0 ? (
        <div className="flex flex-col items-center justify-center text-muted-foreground min-h-[60vh] w-full gap-2">
          {normalizedQuery ? (
            <>
              <Search className="h-[3rem] w-[3rem]" />
              <div className="text-lg mb-2">
                {t('plugins.noMatchingExtensions', {
                  query: searchQuery.trim(),
                })}
              </div>
              <Button variant="outline" size="sm" onClick={clearSearch}>
                {t('common.clear')}
              </Button>
            </>
          ) : (
            <>
              <Puzzle className="h-[3rem] w-[3rem]" />
              <div className="text-lg mb-2">
                {t('plugins.noExtensionInstalled')}
              </div>
            </>
          )}
        </div>
      ) : showGrouped ? (
        <div className="flex flex-col gap-4 pb-4">
          {groupedExtensions.map((group) => (
            <div key={group.type} className="flex flex-col">
              <div className="px-[0.8rem] flex items-center gap-2 mb-2">
                <h3 className="text-sm font-semibold text-foreground">
                  {t(group.labelKey)}
                </h3>
                <span className="text-xs text-muted-foreground">
                  ({group.items.length})
                </span>
              </div>
              <div className="px-[0.8rem] grid gap-5 sm:gap-8 [grid-template-columns:repeat(auto-fill,minmax(min(100%,22rem),1fr))] sm:[grid-template-columns:repeat(auto-fill,minmax(min(100%,28rem),1fr))] items-start">
                {group.items.map((vo, index) => (
                  <div key={vo.id || index}>
                    <ExtensionCardComponent
                      cardVO={vo}
                      onCardClick={() => handleExtensionClick(vo)}
                      onDeleteClick={() => handleExtensionDelete(vo)}
                      onUpgradeClick={
                        vo.type === 'plugin'
                          ? () => handleExtensionUpdate(vo)
                          : undefined
                      }
                    />
                  </div>
                ))}
              </div>
            </div>
          ))}
        </div>
      ) : (
        <div className={`${styles.pluginListContainer}`}>
          {filteredExtensions.map((vo, index) => {
            return (
              <div key={vo.id || index}>
                <ExtensionCardComponent
                  cardVO={vo}
                  onCardClick={() => handleExtensionClick(vo)}
                  onDeleteClick={() => handleExtensionDelete(vo)}
                  onUpgradeClick={
                    vo.type === 'plugin'
                      ? () => handleExtensionUpdate(vo)
                      : undefined
                  }
                />
              </div>
            );
          })}
        </div>
      )}
    </>
  );
});

export default PluginInstalledComponent;