/*
Copyright (C) 2025 QuantumNous

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

For commercial licensing, please contact support@quantumnous.com
*/

import React, { useEffect, useRef, useState } from 'react';
import { Notification, Button, Space, Toast, Typography, Select } from '@douyinfe/semi-ui';
import { API, showError, getModelCategories, selectFilter } from '../../../helpers';
import CardPro from '../../common/ui/CardPro';
import TokensTable from './TokensTable';
import TokensActions from './TokensActions';
import TokensFilters from './TokensFilters';
import TokensDescription from './TokensDescription';
import EditTokenModal from './modals/EditTokenModal';
import { useTokensData } from '../../../hooks/tokens/useTokensData';
import { useIsMobile } from '../../../hooks/common/useIsMobile';
import { createCardProPagination } from '../../../helpers/utils';

function TokensPage() {
  // Define the function first, then pass it into the hook to avoid TDZ errors
  const openFluentNotificationRef = useRef(null);
  const tokensData = useTokensData((key) => openFluentNotificationRef.current?.(key));
  const isMobile = useIsMobile();
  const latestRef = useRef({ tokens: [], selectedKeys: [], t: (k) => k, selectedModel: '', prefillKey: '' });
  const [modelOptions, setModelOptions] = useState([]);
  const [selectedModel, setSelectedModel] = useState('');
  const [fluentNoticeOpen, setFluentNoticeOpen] = useState(false);
  const [prefillKey, setPrefillKey] = useState('');

  // Keep latest data for handlers inside notifications
  useEffect(() => {
    latestRef.current = {
      tokens: tokensData.tokens,
      selectedKeys: tokensData.selectedKeys,
      t: tokensData.t,
      selectedModel,
      prefillKey,
    };
  }, [tokensData.tokens, tokensData.selectedKeys, tokensData.t, selectedModel, prefillKey]);

  const loadModels = async () => {
    try {
      const res = await API.get('/api/user/models');
      const { success, message, data } = res.data || {};
      if (success) {
        const categories = getModelCategories(tokensData.t);
        const options = (data || []).map((model) => {
          let icon = null;
          for (const [key, category] of Object.entries(categories)) {
            if (key !== 'all' && category.filter({ model_name: model })) {
              icon = category.icon;
              break;
            }
          }
          return {
            label: (
              <span className="flex items-center gap-1">
                {icon}
                {model}
              </span>
            ),
            value: model,
          };
        });
        setModelOptions(options);
      } else {
        showError(tokensData.t(message));
      }
    } catch (e) {
      showError(e.message || 'Failed to load models');
    }
  };

  function openFluentNotification(key) {
    const { t } = latestRef.current;
    const SUPPRESS_KEY = 'fluent_notify_suppressed';
    if (modelOptions.length === 0) {
      // fire-and-forget; a later effect will refresh the notice content
      loadModels()
    }
    if (!key && localStorage.getItem(SUPPRESS_KEY) === '1') return;
    const container = document.getElementById('fluent-new-api-container');
    if (!container) {
      Toast.warning(t('未检测到 FluentRead（流畅阅读），请确认扩展已启用'));
      return;
    }
    setPrefillKey(key || '');
    setFluentNoticeOpen(true);
    Notification.info({
      id: 'fluent-detected',
      title: t('检测到 FluentRead（流畅阅读）'),
      content: (
        <div>
          <div style={{ marginBottom: 8 }}>
            {key
              ? t('请选择模型。')
              : t('选择模型后可一键填充当前选中令牌（或本页第一个令牌）。')}
          </div>
          <div style={{ marginBottom: 8 }}>
            <Select
              placeholder={t('请选择模型')}
              optionList={modelOptions}
              onChange={setSelectedModel}
              filter={selectFilter}
              style={{ width: 320 }}
              showClear
              searchable
              emptyContent={t('暂无数据')}
            />
          </div>
          <Space>
            <Button theme="solid" type="primary" onClick={handlePrefillToFluent}>
              {t('一键填充到 FluentRead')}
            </Button>
            {!key && (
              <Button type="warning" onClick={() => {
                localStorage.setItem(SUPPRESS_KEY, '1');
                Notification.close('fluent-detected');
                Toast.info(t('已关闭后续提醒'));
              }}>
                {t('不再提醒')}
              </Button>
            )}
            <Button type="tertiary" onClick={() => Notification.close('fluent-detected')}>
              {t('关闭')}
            </Button>
          </Space>
        </div>
      ),
      duration: 0,
    });
  }
  // assign after definition so hook callback can call it safely
  openFluentNotificationRef.current = openFluentNotification;

  // Prefill to Fluent handler
  const handlePrefillToFluent = () => {
    const { tokens, selectedKeys, t, selectedModel: chosenModel, prefillKey: overrideKey } = latestRef.current;
    const container = document.getElementById('fluent-new-api-container');
    if (!container) {
      Toast.error(t('未检测到 Fluent 容器'));
      return;
    }

    if (!chosenModel) {
      Toast.warning(t('请选择模型'));
      return;
    }

    let status = localStorage.getItem('status');
    let serverAddress = '';
    if (status) {
      try {
        status = JSON.parse(status);
        serverAddress = status.server_address || '';
      } catch (_) { }
    }
    if (!serverAddress) serverAddress = window.location.origin;

    let apiKeyToUse = '';
    if (overrideKey) {
      apiKeyToUse = 'sk-' + overrideKey;
    } else {
      const token = (selectedKeys && selectedKeys.length === 1)
        ? selectedKeys[0]
        : (tokens && tokens.length > 0 ? tokens[0] : null);
      if (!token) {
        Toast.warning(t('没有可用令牌用于填充'));
        return;
      }
      apiKeyToUse = 'sk-' + token.key;
    }

    const payload = {
      id: 'new-api',
      baseUrl: serverAddress,
      apiKey: apiKeyToUse,
      model: chosenModel,
    };

    container.dispatchEvent(new CustomEvent('fluent:prefill', { detail: payload }));
    Toast.success(t('已发送到 Fluent'));
    Notification.close('fluent-detected');
  };

  // Show notification when Fluent container is available
  useEffect(() => {
    const onAppeared = () => {
      openFluentNotification();
    };
    const onRemoved = () => {
      setFluentNoticeOpen(false);
      Notification.close('fluent-detected');
    };

    window.addEventListener('fluent-container:appeared', onAppeared);
    window.addEventListener('fluent-container:removed', onRemoved);
    return () => {
      window.removeEventListener('fluent-container:appeared', onAppeared);
      window.removeEventListener('fluent-container:removed', onRemoved);
    };
  }, []);

  // When modelOptions or language changes while the notice is open, refresh the content
  useEffect(() => {
    if (fluentNoticeOpen) {
      openFluentNotification();
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [modelOptions, selectedModel, tokensData.t, fluentNoticeOpen]);

  useEffect(() => {
    const selector = '#fluent-new-api-container';
    const root = document.body || document.documentElement;

    const existing = document.querySelector(selector);
    if (existing) {
      console.log('Fluent container detected (initial):', existing);
      window.dispatchEvent(new CustomEvent('fluent-container:appeared', { detail: existing }));
    }

    const isOrContainsTarget = (node) => {
      if (!(node && node.nodeType === 1)) return false;
      if (node.id === 'fluent-new-api-container') return true;
      return typeof node.querySelector === 'function' && !!node.querySelector(selector);
    };

    const observer = new MutationObserver((mutations) => {
      for (const m of mutations) {
        // appeared
        for (const added of m.addedNodes) {
          if (isOrContainsTarget(added)) {
            const el = document.querySelector(selector);
            if (el) {
              console.log('Fluent container appeared:', el);
              window.dispatchEvent(new CustomEvent('fluent-container:appeared', { detail: el }));
            }
            break;
          }
        }
        // removed
        for (const removed of m.removedNodes) {
          if (isOrContainsTarget(removed)) {
            const elNow = document.querySelector(selector);
            if (!elNow) {
              console.log('Fluent container removed');
              window.dispatchEvent(new CustomEvent('fluent-container:removed'));
            }
            break;
          }
        }
      }
    });

    observer.observe(root, { childList: true, subtree: true });
    return () => observer.disconnect();
  }, []);

  const {
    // Edit state
    showEdit,
    editingToken,
    closeEdit,
    refresh,

    // Actions state
    selectedKeys,
    setEditingToken,
    setShowEdit,
    batchCopyTokens,
    batchDeleteTokens,
    copyText,

    // Filters state
    formInitValues,
    setFormApi,
    searchTokens,
    loading,
    searching,

    // Description state
    compactMode,
    setCompactMode,

    // Translation
    t,
  } = tokensData;

  return (
    <>
      <EditTokenModal
        refresh={refresh}
        editingToken={editingToken}
        visiable={showEdit}
        handleClose={closeEdit}
      />

      <CardPro
        type="type1"
        descriptionArea={
          <TokensDescription
            compactMode={compactMode}
            setCompactMode={setCompactMode}
            t={t}
          />
        }
        actionsArea={
          <div className="flex flex-col md:flex-row justify-between items-center gap-2 w-full">
            <TokensActions
              selectedKeys={selectedKeys}
              setEditingToken={setEditingToken}
              setShowEdit={setShowEdit}
              batchCopyTokens={batchCopyTokens}
              batchDeleteTokens={batchDeleteTokens}
              copyText={copyText}
              t={t}
            />

            <div className="w-full md:w-full lg:w-auto order-1 md:order-2">
              <TokensFilters
                formInitValues={formInitValues}
                setFormApi={setFormApi}
                searchTokens={searchTokens}
                loading={loading}
                searching={searching}
                t={t}
              />
            </div>
          </div>
        }
        paginationArea={createCardProPagination({
          currentPage: tokensData.activePage,
          pageSize: tokensData.pageSize,
          total: tokensData.tokenCount,
          onPageChange: tokensData.handlePageChange,
          onPageSizeChange: tokensData.handlePageSizeChange,
          isMobile: isMobile,
          t: tokensData.t,
        })}
        t={tokensData.t}
      >
        <TokensTable {...tokensData} />
      </CardPro>
    </>
  );
}

export default TokensPage;