import React, { useState, useCallback, useRef, CSSProperties } from 'react';
import { useEditor } from '@craftjs/core';
import {
  RADIUS_PRESETS,
} from '../../../constants/presets';
import {
  StylePanelProps,
  SectionLabel,
  PresetButtonGrid,
  TextInputField,
  uploadToWhp,
} from './shared';

/* ---------- IMAGE (with upload/browse/drop) ---------- */
export const ImageStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps }) => {
  const { actions } = useEditor();
  const style: CSSProperties = nodeProps.style || {};
  const fileInputRef = useRef<HTMLInputElement>(null);
  const [showBrowser, setShowBrowser] = useState(false);
  const [browserAssets, setBrowserAssets] = useState<any[]>([]);
  const [browserLoading, setBrowserLoading] = useState(false);
  const [imgUrl, setImgUrl] = useState(nodeProps.src || '');

  const PLACEHOLDER_SRC = "data:image/svg+xml,%3Csvg";
  const isPlaceholder = !nodeProps.src || nodeProps.src.startsWith('data:image/svg');

  const setPropStyle = useCallback(
    (property: string, value: string) => {
      actions.setProp(selectedId, (props: any) => {
        props.style = { ...props.style, [property]: value };
      });
    },
    [actions, selectedId],
  );

  const handleUpload = useCallback(async (file: File) => {
    const url = await uploadToWhp(file);
    if (url) {
      actions.setProp(selectedId, (props: any) => { props.src = url; });
      setImgUrl(url);
    }
  }, [actions, selectedId]);

  const handleBrowse = useCallback(async () => {
    if (showBrowser) { setShowBrowser(false); return; }
    const cfg = (window as any).WHP_CONFIG;
    if (!cfg) return;
    setBrowserLoading(true);
    try {
      const resp = await fetch(`${cfg.apiUrl}?action=list_assets&site_id=${cfg.siteId}`);
      const data = await resp.json();
      if (data.success && Array.isArray(data.assets)) {
        const images = data.assets.filter((a: any) => (a.type || '').startsWith('image'));
        setBrowserAssets(images);
        setShowBrowser(true);
      }
    } catch (e) {
      console.error('Browse failed:', e);
    } finally {
      setBrowserLoading(false);
    }
  }, [showBrowser]);

  const maxWidthPresets = [
    { label: '25%', value: '25%' },
    { label: '50%', value: '50%' },
    { label: '75%', value: '75%' },
    { label: '100%', value: '100%' },
  ];

  const getFriendlyName = (src: string) => {
    const match = src.match(/filename=([^&]+)/);
    if (match) return decodeURIComponent(match[1]).replace(/^\d+_[a-f0-9]+_/, '');
    return src.split('/').pop() || 'image';
  };

  return (
    <>
      {/* Image source with upload/browse */}
      <div className="guided-section">
        <SectionLabel>Image Source</SectionLabel>

        {!isPlaceholder && nodeProps.src ? (
          <>
            <div style={{ marginBottom: 8, borderRadius: 6, overflow: 'hidden', border: '1px solid #3f3f46', position: 'relative' }}>
              <img src={nodeProps.src} alt="" style={{ width: '100%', height: 'auto', display: 'block', maxHeight: 150, objectFit: 'cover' }} />
              <button
                onClick={() => { actions.setProp(selectedId, (props: any) => { props.src = ''; }); setImgUrl(''); }}
                style={{ position: 'absolute', top: 4, right: 4, width: 24, height: 24, borderRadius: '50%', background: 'rgba(0,0,0,0.7)', border: 'none', color: '#fff', cursor: 'pointer', fontSize: 12, display: 'flex', alignItems: 'center', justifyContent: 'center' }}
                title="Remove image"
              >
                <i className="fa fa-times" />
              </button>
            </div>
            <div style={{ fontSize: 11, color: '#a1a1aa', marginBottom: 8, display: 'flex', alignItems: 'center', gap: 4 }}>
              <i className="fa fa-check-circle" style={{ color: '#10b981' }} />
              <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{getFriendlyName(nodeProps.src || '')}</span>
            </div>
          </>
        ) : (
          <div
            style={{ padding: '20px 12px', border: '2px dashed #3f3f46', borderRadius: 6, textAlign: 'center', color: '#71717a', fontSize: 12, cursor: 'pointer', marginBottom: 8, transition: 'border-color 0.15s' }}
            onDragOver={(e) => { e.preventDefault(); e.currentTarget.style.borderColor = '#3b82f6'; }}
            onDragLeave={(e) => { e.currentTarget.style.borderColor = '#3f3f46'; }}
            onDrop={async (e) => {
              e.preventDefault();
              e.currentTarget.style.borderColor = '#3f3f46';
              const file = e.dataTransfer.files?.[0];
              if (file && file.type.startsWith('image/')) await handleUpload(file);
            }}
            onClick={() => fileInputRef.current?.click()}
          >
            <i className="fa fa-cloud-upload" style={{ fontSize: 24, display: 'block', marginBottom: 6, color: '#3b82f6' }} />
            Drop image here or click to upload
          </div>
        )}

        {/* Upload + Browse buttons */}
        <div style={{ display: 'flex', gap: 4 }}>
          <button
            onClick={() => fileInputRef.current?.click()}
            style={{ flex: 1, padding: '8px 10px', fontSize: 12, borderRadius: 4, cursor: 'pointer', border: '1px solid #3f3f46', background: '#3b82f6', color: '#fff', fontWeight: 500 }}
          >
            <i className="fa fa-upload" style={{ marginRight: 4 }} /> Upload
          </button>
          <button
            onClick={handleBrowse}
            style={{ flex: 1, padding: '8px 10px', fontSize: 12, borderRadius: 4, cursor: 'pointer', border: '1px solid #3f3f46', background: showBrowser ? '#3b82f6' : '#27272a', color: showBrowser ? '#fff' : '#e4e4e7' }}
          >
            <i className={`fa ${browserLoading ? 'fa-spinner fa-spin' : 'fa-folder-open'}`} style={{ marginRight: 4 }} /> Browse
          </button>
        </div>

        {/* Inline asset browser grid */}
        {showBrowser && (
          <div style={{ maxHeight: 200, overflowY: 'auto', display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: 4, marginTop: 8, background: '#18181b', borderRadius: 6, padding: 4 }}>
            {browserAssets.map((asset) => (
              <div
                key={asset.name}
                onClick={() => {
                  actions.setProp(selectedId, (props: any) => { props.src = asset.url; });
                  setImgUrl(asset.url);
                  setShowBrowser(false);
                }}
                style={{ cursor: 'pointer', borderRadius: 4, overflow: 'hidden', border: '2px solid transparent', aspectRatio: '1', transition: 'border-color 0.15s' }}
                onMouseEnter={(e) => { e.currentTarget.style.borderColor = '#3b82f6'; }}
                onMouseLeave={(e) => { e.currentTarget.style.borderColor = 'transparent'; }}
              >
                <img src={asset.url} alt={asset.name} style={{ width: '100%', height: '100%', objectFit: 'cover', display: 'block' }} />
              </div>
            ))}
            {browserAssets.length === 0 && (
              <p style={{ gridColumn: '1 / -1', textAlign: 'center', color: '#71717a', fontSize: 11, padding: '12px 0', margin: 0 }}>No images uploaded yet. Use Upload above.</p>
            )}
          </div>
        )}

        <input ref={fileInputRef} type="file" accept="image/*" style={{ display: 'none' }}
          onChange={(e) => { const file = e.target.files?.[0]; if (file) handleUpload(file); e.target.value = ''; }} />

        {/* URL input for advanced users */}
        <div style={{ marginTop: 6 }}>
          <div className="guided-input-row">
            <input
              type="text"
              className="guided-input"
              value={imgUrl}
              placeholder="Or paste image URL..."
              onChange={(e) => setImgUrl(e.target.value)}
              style={{ fontSize: 11 }}
            />
            <button
              className="preset-btn apply-btn"
              onClick={() => {
                actions.setProp(selectedId, (props: any) => { props.src = imgUrl; });
              }}
            >
              Apply
            </button>
          </div>
        </div>
      </div>

      {/* Alt Text */}
      <TextInputField
        label="Alt Text"
        value={nodeProps.alt || ''}
        placeholder="Describe the image..."
        onChange={(v) => {
          actions.setProp(selectedId, (props: any) => { props.alt = v; });
        }}
      />

      {/* Border Radius */}
      <div className="guided-section">
        <SectionLabel>Border Radius</SectionLabel>
        <PresetButtonGrid
          presets={RADIUS_PRESETS}
          activeValue={style.borderRadius as string}
          onSelect={(v) => setPropStyle('borderRadius', v)}
        />
      </div>

      {/* Max Width */}
      <div className="guided-section">
        <SectionLabel>Max Width</SectionLabel>
        <PresetButtonGrid
          presets={maxWidthPresets}
          activeValue={style.maxWidth as string}
          onSelect={(v) => setPropStyle('maxWidth', v)}
        />
      </div>
    </>
  );
};