import { useState } from 'react';
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Checkbox } from '@/components/ui/checkbox';
import { Label } from '@/components/ui/label';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { useAppStore } from '@/stores/app-store';
import { useSettingsStore } from '@/stores/settings-store';
import { useExportSource } from '@/hooks/use-export-source';
import { generateHtml } from '@/lib/html-export';
import { ipc } from '@/lib/ipc';
import { toast } from '@/lib/toast';
import { ExportDialogFooter } from './ExportDialogFooter';

export function ExportHtmlDialog({ sourcePath }: { sourcePath: string }) {
  const closeModal = useAppStore((s) => s.closeModal);
  const { htmlHighlightStyle, renderTablesAsAscii } = useSettingsStore();
  const source = useExportSource();
  const [standalone, setStandalone] = useState(true);
  const [highlight, setHighlight] = useState(htmlHighlightStyle);
  const [ascii, setAscii] = useState(renderTablesAsAscii);
  const [submitting, setSubmitting] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const handleSubmit = async () => {
    if (!source) { setError('No file open.'); return; }
    setSubmitting(true);
    setError(null);
    try {
      const html = generateHtml({
        source: source.source,
        title: source.title,
        standalone,
        highlightStyle: highlight,
        renderTablesAsAscii: ascii,
      });
      const saveResult = await ipc.app.showSaveDialog?.({ title: 'Save as HTML', defaultPath: source.path.replace(/\.md$/, '.html') });
      if (!saveResult?.ok || !saveResult.data) {
        setSubmitting(false);
        return;
      }
      const buffer = new TextEncoder().encode(html);
      const writeResult = await ipc.file.writeBuffer({ path: saveResult.data, buffer });
      if (!writeResult.ok) {
        setError(writeResult.error.message);
        setSubmitting(false);
        return;
      }
      toast.success(`Exported ${source.title} to ${saveResult.data}`);
      closeModal();
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      toast.error(`Export failed: ${msg}`);
      setError(msg);
      setSubmitting(false);
    }
  };

  return (
    <Dialog open onOpenChange={(o) => !o && closeModal()}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>Export to HTML</DialogTitle>
          <DialogDescription>{sourcePath}</DialogDescription>
        </DialogHeader>
        <div className="space-y-3 text-sm">
          <label className="flex items-center gap-2">
            <Checkbox checked={standalone} onCheckedChange={(c) => setStandalone(!!c)} aria-label="Standalone" />
            Standalone document (with inline CSS)
          </label>
          <div>
            <Label htmlFor="html-highlight">Syntax highlight style</Label>
            <Select value={highlight} onValueChange={(v) => setHighlight(v as any)}>
              <SelectTrigger id="html-highlight" aria-label="Highlight style"><SelectValue /></SelectTrigger>
              <SelectContent>
                <SelectItem value="github">GitHub</SelectItem>
                <SelectItem value="monokai">Monokai</SelectItem>
                <SelectItem value="nord">Nord</SelectItem>
                <SelectItem value="none">None</SelectItem>
              </SelectContent>
            </Select>
          </div>
          <label className="flex items-center gap-2">
            <Checkbox checked={ascii} onCheckedChange={(c) => setAscii(!!c)} aria-label="ASCII tables" />
            Render tables as ASCII
          </label>
          {error && (
            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
              {error}
            </div>
          )}
        </div>
        <ExportDialogFooter onCancel={closeModal} onSubmit={handleSubmit} submitting={submitting} submitLabel="Export" />
      </DialogContent>
    </Dialog>
  );
}