// frontend/src/pages/SettingsPage.jsx
import { useRef } from 'react';
import {
  CheckCircle2, Download, RefreshCw, Upload, XCircle
} from 'lucide-react';
import useSettingsForm from '../hooks/useSettingsForm';
import CorePathsSection from '../components/settings/CorePathsSection';
import AdvancedStrategySection from '../components/settings/AdvancedStrategySection';
import ScheduleSection from '../components/settings/ScheduleSection';
import NotificationSection from '../components/settings/NotificationSection';
import MetadataServicesSection from '../components/settings/MetadataServicesSection';
import ConfigExportDialog from '../components/settings/ConfigExportDialog';
import ConfigImportDialog from '../components/settings/ConfigImportDialog';

export default function SettingsPage({ config, setConfig, setTaskState }) {
  const {
    localConfig, netStatus, toast, isSaving,
    isExportDialogOpen, isExporting, exportPassword, exportPasswordConfirm,
    importDialog, fileInputRef,
    updateField,
    handleSave,
    setExportPassword, setExportPasswordConfirm,
    handleOpenExportDialog, handleCloseExportDialog, handleExportConfig,
    handleImportButtonClick, handleImportFileChange,
    handleCloseImportDialog, handleImportDecrypt, handleImportConfirm
  } = useSettingsForm({ config, setConfig, setTaskState });

  const updateNested = (section, value) => {
    // Create a new localConfig with the nested section updated
    // useSettingsForm doesn't have updateNestedField exposed directly,
    // so we use updateField for top-level fields, and for nested
    // sections we pass the merged object directly.
    // The section components call onUpdate with the section name and
    // the full merged object for that section.
  };

  return (
    <div className="w-full py-6">
      {/* Header */}
      <div className="mb-8 flex flex-col gap-4 lg:flex-row lg:items-center lg:justify-between">
        <div>
          <h2 className="mb-2 text-2xl font-bold text-white">系统运行配置</h2>
          <p className="text-slate-400">全局基础目录设定及核心入库引擎的高级策略配置。</p>
        </div>
        <div className="flex flex-wrap items-center gap-3">
          <button type="button" onClick={handleImportButtonClick} disabled={isSaving}
            className="flex items-center whitespace-nowrap rounded-lg border border-slate-700 bg-slate-900 px-4 py-2.5 text-sm font-medium text-slate-200 transition hover:border-blue-500/50 hover:bg-slate-800 disabled:cursor-not-allowed disabled:opacity-60">
            <Upload className="mr-2 h-4 w-4" />导入配置
          </button>
          <button type="button" onClick={handleOpenExportDialog} disabled={isSaving}
            className="flex items-center whitespace-nowrap rounded-lg border border-slate-700 bg-slate-900 px-4 py-2.5 text-sm font-medium text-slate-200 transition hover:border-emerald-500/50 hover:bg-slate-800 disabled:cursor-not-allowed disabled:opacity-60">
            <Download className="mr-2 h-4 w-4" />导出配置
          </button>
          <button type="button" onClick={handleSave} disabled={isSaving}
            className="flex items-center whitespace-nowrap rounded-lg bg-blue-600 px-6 py-2.5 text-sm font-medium text-white shadow-lg shadow-blue-900/20 transition hover:bg-blue-500 disabled:cursor-not-allowed disabled:opacity-70">
            {isSaving ? <RefreshCw className="mr-2 h-4 w-4 animate-spin" /> : <CheckCircle2 className="mr-2 h-4 w-4" />}
            {isSaving ? '校验并保存...' : '保存系统配置'}
          </button>
        </div>
      </div>

      {/* Hidden file input for import */}
      <input ref={fileInputRef} type="file" accept=".json,application/json"
        className="hidden" onChange={handleImportFileChange} />

      {/* Toast notification */}
      {toast && (
        <div className={`fixed left-1/2 top-6 z-[100] flex -translate-x-1/2 items-center rounded-xl border px-5 py-3 shadow-2xl backdrop-blur-md animate-in slide-in-from-top-4 fade-in duration-300 ${
          toast.type === 'success' ? 'border-emerald-500/50 bg-emerald-950/90 text-emerald-400' : 'border-rose-500/50 bg-rose-950/90 text-rose-400'
        }`}>
          {toast.type === 'success' ? <CheckCircle2 className="mr-2 h-5 w-5" /> : <XCircle className="mr-2 h-5 w-5" />}
          <span className="text-sm font-medium">{toast.message}</span>
        </div>
      )}

      {/* Configuration Sections */}
      <div className="mb-8 space-y-6">
        <CorePathsSection
          input={localConfig.input}
          output={localConfig.output}
          trash={localConfig.trash}
          onUpdate={(field, value) => updateField(field, value)}
        />

        <AdvancedStrategySection
          advancedStrategy={localConfig.advancedStrategy || {}}
          onUpdate={(section, value) => updateField(section, value)}
        />

        <ScheduleSection
          schedule={localConfig.schedule || {}}
          onUpdate={(section, value) => updateField(section, value)}
        />

        <NotificationSection
          notifications={localConfig.notifications || {}}
          onUpdate={(section, value) => updateField(section, value)}
        />

        <MetadataServicesSection
          metadata={localConfig.metadata || {}}
          netStatus={netStatus}
          onUpdate={(section, value) => updateField(section, value)}
        />
      </div>

      {/* Dialogs */}
      <ConfigExportDialog
        isOpen={isExportDialogOpen}
        isExporting={isExporting}
        password={exportPassword}
        passwordConfirm={exportPasswordConfirm}
        onClose={handleCloseExportDialog}
        onExport={handleExportConfig}
        onPasswordChange={setExportPassword}
        onPasswordConfirmChange={setExportPasswordConfirm}
      />

      <ConfigImportDialog
        importDialog={importDialog}
        onClose={handleCloseImportDialog}
        onDecrypt={handleImportDecrypt}
        onConfirm={handleImportConfirm}
      />
    </div>
  );
}