import React, { useCallback, useEffect, useState } from 'react';

import { ipcChannels, type SessionState } from '../../shared/ipc/contracts';
import type { MaterialId } from '../../shared/types';
import { MaterialsBrowser } from '../editor/MaterialsBrowser';
import matStyles from '../editor/MaterialsModals.module.css';
import { useEditorI18n } from '../editor/i18n/EditorI18nContext';
import { getDndApi } from '../shared/dndApi';
import { useMaterialsOverlayState } from '../shared/materials/useMaterialsOverlayState';
import { Button } from '../shared/ui/controls';

import styles from './MaterialsApp.module.css';

function ZoomInIcon() {
  return (
    <svg viewBox="0 0 24 24" width="20" height="20" aria-hidden>
      <circle cx="10.5" cy="10.5" r="6.25" fill="none" stroke="currentColor" strokeWidth="1.8" />
      <path d="M15.2 15.2 20 20" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" />
      <path
        d="M10.5 7.8v5.4M7.8 10.5h5.4"
        fill="none"
        stroke="currentColor"
        strokeWidth="1.8"
        strokeLinecap="round"
      />
    </svg>
  );
}

function ZoomOutIcon() {
  return (
    <svg viewBox="0 0 24 24" width="20" height="20" aria-hidden>
      <circle cx="10.5" cy="10.5" r="6.25" fill="none" stroke="currentColor" strokeWidth="1.8" />
      <path d="M15.2 15.2 20 20" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" />
      <path d="M7.8 10.5h5.4" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" />
    </svg>
  );
}

export function MaterialsApp() {
  const { t } = useEditorI18n();
  const api = getDndApi();
  const [session, setSession] = useState<SessionState | null>(null);
  const [overlay, overlayApi] = useMaterialsOverlayState();
  const [selectedId, setSelectedId] = useState<MaterialId | null>(null);
  const onSelect = useCallback((id: MaterialId | null) => setSelectedId(id), []);

  useEffect(() => {
    void api.invoke(ipcChannels.project.get, {}).then(({ project }) => {
      setSession({ project, currentSceneId: project?.currentSceneId ?? null });
      const mats = project?.materials ?? [];
      setSelectedId(mats[0]?.id ?? null);
    });
    return api.on(ipcChannels.session.stateChanged, ({ state }) => {
      setSession(state);
    });
  }, [api]);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      if (e.key === 'Escape') {
        if (overlay?.activeMaterialId) {
          void overlayApi.dispatch({ kind: 'hide' });
          return;
        }
        if (overlay?.zoomTool) {
          void overlayApi.dispatch({ kind: 'zoomTool.set', tool: null });
          return;
        }
        window.close();
      }
    };
    window.addEventListener('keydown', onKey);
    return () => window.removeEventListener('keydown', onKey);
  }, [overlay?.activeMaterialId, overlay?.zoomTool, overlayApi]);

  const materials = session?.project?.materials ?? [];
  const activeId = overlay?.activeMaterialId ?? null;
  const zoomTool = overlay?.zoomTool ?? null;

  return (
    <div className={styles.page}>
      <MaterialsBrowser
        mode="runtime"
        fillHeight
        listOnly
        className={styles.browser}
        materials={materials}
        selectedId={selectedId}
        onSelect={onSelect}
        activeMaterialId={activeId}
        onTileActivate={(id) => {
          const mat = materials.find((m) => m.id === id);
          void overlayApi.dispatch({
            kind: 'toggle',
            materialId: id,
            rotationDeg: mat?.rotationDeg ?? 0,
          });
        }}
        toolbar={
          <>
            <div className={matStyles.browserToolbarRow}>
              <Button
                variant={zoomTool === 'zoomIn' ? 'primary' : 'ghost'}
                iconOnly
                title={t('materials.zoomIn')}
                ariaLabel={t('materials.zoomIn')}
                tooltipPlacement="bottom"
                onClick={() => {
                  void overlayApi.dispatch({
                    kind: 'zoomTool.set',
                    tool: zoomTool === 'zoomIn' ? null : 'zoomIn',
                  });
                }}
              >
                <ZoomInIcon />
              </Button>
              <Button
                variant={zoomTool === 'zoomOut' ? 'primary' : 'ghost'}
                iconOnly
                title={t('materials.zoomOut')}
                ariaLabel={t('materials.zoomOut')}
                tooltipPlacement="bottom"
                onClick={() => {
                  void overlayApi.dispatch({
                    kind: 'zoomTool.set',
                    tool: zoomTool === 'zoomOut' ? null : 'zoomOut',
                  });
                }}
              >
                <ZoomOutIcon />
              </Button>
            </div>
            {activeId ? (
              <Button
                title={t('materials.closeOverlay')}
                ariaLabel={t('materials.closeOverlay')}
                tooltipPlacement="bottom"
                onClick={() => {
                  void overlayApi.dispatch({ kind: 'hide' });
                }}
              >
                {t('materials.closeOverlay')}
              </Button>
            ) : null}
            <div className={matStyles.browserToolbarHint}>
              {zoomTool === 'zoomIn'
                ? t('materials.zoomInHint')
                : zoomTool === 'zoomOut'
                  ? t('materials.zoomOutHint')
                  : t('materials.zoomIdleHint')}
            </div>
          </>
        }
      />
    </div>
  );
}