import { useEffect, useMemo, useState } from 'react';
import axios from 'axios';
import { ChevronLeft, ChevronRight, Hammer, RefreshCw, Search, X } from 'lucide-react';
import { APP_ENDPOINTS } from '../../../config/env';
import type { BotSkillMarketItem } from '../../platform/types';
import { LucentIconButton } from '../../../components/lucent/LucentIconButton';
import {
  normalizePlatformPageSize,
  readCachedPlatformPageSize,
  writeCachedPlatformPageSize,
} from '../../../utils/platformPageSize';

interface SkillMarketInstallModalProps {
  isZh: boolean;
  open: boolean;
  items: BotSkillMarketItem[];
  loading: boolean;
  installingId: number | null;
  onClose: () => void;
  onRefresh: () => Promise<void> | void;
  onInstall: (item: BotSkillMarketItem) => Promise<void> | void;
  formatBytes: (bytes: number) => string;
}

export function SkillMarketInstallModal({
  isZh,
  open,
  items,
  loading,
  installingId,
  onClose,
  onRefresh,
  onInstall,
  formatBytes,
}: SkillMarketInstallModalProps) {
  const [search, setSearch] = useState('');
  const [page, setPage] = useState(1);
  const [pageSize, setPageSize] = useState(() => readCachedPlatformPageSize(10));

  useEffect(() => {
    if (!open) return;
    setSearch('');
    setPage(1);
    void onRefresh();
    void (async () => {
      try {
        const res = await axios.get<{ page_size?: number }>(`${APP_ENDPOINTS.apiBase}/platform/settings`);
        const normalized = normalizePlatformPageSize(res.data?.page_size, readCachedPlatformPageSize(10));
        writeCachedPlatformPageSize(normalized);
        setPageSize(normalized);
      } catch {
        setPageSize(readCachedPlatformPageSize(10));
      }
    })();
  }, [open]);

  useEffect(() => {
    setPage(1);
  }, [search, pageSize]);

  const filteredItems = useMemo(() => {
    const keyword = search.trim().toLowerCase();
    if (!keyword) return items;
    return items.filter((item) =>
      [item.display_name, item.skill_key, item.description, item.zip_filename].some((value) =>
        String(value || '').toLowerCase().includes(keyword),
      ),
    );
  }, [items, search]);

  const pageCount = Math.max(1, Math.ceil(filteredItems.length / pageSize));
  const currentPage = Math.min(page, pageCount);
  const pagedItems = useMemo(
    () => filteredItems.slice((currentPage - 1) * pageSize, currentPage * pageSize),
    [currentPage, filteredItems, pageSize],
  );

  if (!open) return null;

  return (
    <div className="modal-mask" onClick={onClose}>
      <div className="modal-card modal-wide platform-modal skill-market-browser-shell" onClick={(event) => event.stopPropagation()}>
        <div className="modal-title-row modal-title-with-close">
          <div className="modal-title-main">
            <h3>{isZh ? '从市场安装技能' : 'Install From Marketplace'}</h3>
          </div>
          <div className="modal-title-actions">
            <LucentIconButton
              className="btn btn-secondary btn-sm icon-btn"
              onClick={() => void onRefresh()}
              tooltip={isZh ? '刷新市场技能' : 'Refresh marketplace skills'}
              aria-label={isZh ? '刷新市场技能' : 'Refresh marketplace skills'}
            >
              <RefreshCw size={14} className={loading ? 'animate-spin' : ''} />
            </LucentIconButton>
            <LucentIconButton className="btn btn-secondary btn-sm icon-btn" onClick={onClose} tooltip={isZh ? '关闭' : 'Close'} aria-label={isZh ? '关闭' : 'Close'}>
              <X size={14} />
            </LucentIconButton>
          </div>
        </div>

        <div className="skill-market-browser-toolbar">
          <div className="ops-searchbar platform-searchbar skill-market-search">
            <input
              className="input ops-search-input ops-search-input-with-icon"
              type="search"
              value={search}
              onChange={(event) => setSearch(event.target.value)}
              placeholder={isZh ? '搜索技能、标识或 ZIP 文件名...' : 'Search skills, keys, or ZIP filenames...'}
              aria-label={isZh ? '搜索技能市场' : 'Search skill marketplace'}
            />
            <button
              type="button"
              className="ops-search-inline-btn"
              onClick={() => setSearch('')}
              title={search.trim() ? (isZh ? '清空搜索' : 'Clear search') : (isZh ? '搜索' : 'Search')}
              aria-label={search.trim() ? (isZh ? '清空搜索' : 'Clear search') : (isZh ? '搜索' : 'Search')}
            >
              {search.trim() ? <X size={14} /> : <Search size={14} />}
            </button>
          </div>
        </div>

        <div className="skill-market-browser-grid">
          {loading ? (
            <div className="ops-empty-inline skill-market-empty-card">{isZh ? '正在读取技能市场...' : 'Loading marketplace skills...'}</div>
          ) : pagedItems.length === 0 ? (
            <div className="ops-empty-inline skill-market-empty-card">
              {filteredItems.length === 0
                ? (isZh ? '没有匹配的技能。' : 'No matching skills found.')
                : (isZh ? '当前页没有技能。' : 'No skills on this page.')}
            </div>
          ) : (
            pagedItems.map((skill) => {
              const isInstalled = Boolean(skill.installed);
              const isInstalling = installingId === skill.id;
              return (
                <article key={skill.id} className={`skill-market-card skill-market-browser-card ${isInstalled ? 'is-active' : ''}`}>
                  <div className="skill-market-card-top">
                    <div className="skill-market-card-title-wrap">
                      <h4>{skill.display_name || skill.skill_key}</h4>
                      <div className="skill-market-card-key mono">{skill.skill_key}</div>
                    </div>
                    <span className={`badge ${isInstalled ? 'badge-ok' : 'badge-unknown'} skill-market-browser-badge`}>
                      {isInstalled ? (isZh ? '已安装' : 'Installed') : (isZh ? '未安装' : 'Not installed')}
                    </span>
                  </div>
                  <p className="skill-market-card-desc skill-market-browser-desc">{skill.description || (isZh ? '暂无简介。' : 'No description yet.')}</p>
                  <div className="skill-market-card-meta skill-market-browser-meta">
                    <span>{isZh ? 'ZIP' : 'ZIP'}: {skill.zip_filename}</span>
                    <span>{isZh ? '体积' : 'Size'}: {formatBytes(skill.zip_size_bytes)}</span>
                    <span>{isZh ? '安装次数' : 'Installs'}: {skill.install_count}</span>
                  </div>
                  {skill.install_error && !isInstalled ? (
                    <div className="field-label" style={{ color: 'var(--err)' }}>
                      {skill.install_error}
                    </div>
                  ) : null}
                  <div className="skill-market-card-footer skill-market-browser-footer">
                    <span className={skill.zip_exists ? 'skill-market-card-status is-ok' : 'skill-market-card-status is-missing'}>
                      {skill.zip_exists ? (isZh ? '市场包可用' : 'Package ready') : (isZh ? '市场包缺失' : 'Package missing')}
                    </span>
                    <button
                      className="btn btn-primary btn-sm skill-market-install-btn"
                      disabled={isInstalled || isInstalling || !skill.zip_exists}
                      onClick={() => void onInstall(skill)}
                    >
                      {isInstalling ? <RefreshCw size={14} className="animate-spin" /> : <Hammer size={14} />}
                      <span style={{ marginLeft: 6 }}>
                        {isInstalling ? (isZh ? '安装中...' : 'Installing...') : isInstalled ? (isZh ? '已安装' : 'Installed') : (isZh ? '一键安装' : 'Install')}
                      </span>
                    </button>
                  </div>
                </article>
              );
            })
          )}
        </div>

        <div className="skill-market-pager">
          <span className="pager-status">
            {isZh
              ? `第 ${currentPage} / ${pageCount} 页，共 ${filteredItems.length} 个技能`
              : `Page ${currentPage} / ${pageCount}, ${filteredItems.length} skills`}
          </span>
          <div className="platform-usage-pager-actions">
            <LucentIconButton
              className="btn btn-secondary btn-sm icon-btn pager-icon-btn"
              type="button"
              disabled={currentPage <= 1}
              onClick={() => setPage((value) => Math.max(1, value - 1))}
              tooltip={isZh ? '上一页' : 'Previous'}
              aria-label={isZh ? '上一页' : 'Previous'}
            >
              <ChevronLeft size={16} />
            </LucentIconButton>
            <LucentIconButton
              className="btn btn-secondary btn-sm icon-btn pager-icon-btn"
              type="button"
              disabled={currentPage >= pageCount}
              onClick={() => setPage((value) => Math.min(pageCount, value + 1))}
              tooltip={isZh ? '下一页' : 'Next'}
              aria-label={isZh ? '下一页' : 'Next'}
            >
              <ChevronRight size={16} />
            </LucentIconButton>
          </div>
        </div>
      </div>
    </div>
  );
}