import { ChevronDown, ImageIcon, X } from 'lucide-react';
import {
  type CSSProperties,
  type Dispatch,
  type ReactNode,
  type SetStateAction,
  useCallback,
  useRef,
  useState,
} from 'react';

import type {
  EditorCharacterAnimationRatio,
  EditorCharacterAnimationResolution,
} from '../../services/image-editor/editorProjectClient';
import { AutoGrowTextArea } from '../common/AutoGrowTextArea';
import { PlatformActionButton } from '../common/PlatformActionButton';
import { PlatformFloatingMenu } from '../common/PlatformFloatingMenu';
import { PlatformInlineOptionButton } from '../common/PlatformInlineOptionButton';
import { PlatformStatusMessage } from '../common/PlatformStatusMessage';
import { ImageCanvasEditorPortal } from './ImageCanvasEditorPortal';
import { EditorIconButton } from './ImageCanvasEditorPrimitives';
import type {
  CanvasLayer,
  CharacterAnimationPanelState,
} from './ImageCanvasEditorTypes';
import {
  CHARACTER_ANIMATION_ACTION_PROMPTS,
  CHARACTER_ANIMATION_DURATION_OPTIONS,
  CHARACTER_ANIMATION_RATIO_OPTIONS,
} from './ImageCanvasGenerationModel';
import { ImageCanvasReferenceSlot } from './ImageCanvasReferenceSlot';
import { useImageCanvasFloatingOptionDismiss } from './useImageCanvasFloatingOptionDismiss';

type ImageCanvasCharacterAnimationPanelViewProps = {
  panel: CharacterAnimationPanelState;
  sourceLayer: CanvasLayer;
  style: CSSProperties;
  price: number;
  setCharacterAnimationPanel: Dispatch<
    SetStateAction<CharacterAnimationPanelState | null>
  >;
  onUpdateDuration: (frameCountValue: string) => void;
  onSubmit: () => void;
  /**
   * 比例 / 时长 / 清晰度入口是否渲染，默认 `true`，与美术画布一致。
   *
   * 传 `false` 的宿主必须自己说清这三个值由谁决定：它们不在该宿主的提交载荷里时，
   * 渲染出来就是点了不生效的假控件（改了 1080p 实际仍按固定档出图）。
   */
  showParameters?: boolean;
};

function resetFailedPanelStatus<
  T extends { status: string; errorMessage?: string },
>(panel: T) {
  return {
    ...panel,
    status: panel.status === 'failed' ? 'idle' : panel.status,
    errorMessage: panel.status === 'failed' ? undefined : panel.errorMessage,
  };
}

function buildLocalMenuStyle(anchor: HTMLElement | null): CSSProperties {
  const rect = anchor?.getBoundingClientRect();
  if (!rect) {
    return {
      position: 'fixed',
      left: 0,
      top: 0,
      right: 'auto',
      bottom: 'auto',
      zIndex: 70,
    };
  }

  return {
    position: 'fixed',
    left: Math.round(rect.left),
    top: Math.round(rect.top),
    right: 'auto',
    bottom: 'auto',
    zIndex: 70,
    transform: 'translateY(calc(-100% - 0.45rem))',
  };
}

function renderPanelPortal(node: ReactNode) {
  // 中文注释：参数菜单挂到页面级，避免被角色动画面板滚动边界裁切。
  return <ImageCanvasEditorPortal>{node}</ImageCanvasEditorPortal>;
}

function getRatioLabel(value: EditorCharacterAnimationRatio) {
  return value === 'same' ? '同图尺寸' : value;
}

function AnimationOptionChoice({
  children,
  selected,
  className,
  ariaLabel,
  disabled,
  onClick,
}: {
  children: ReactNode;
  selected: boolean;
  className?: string;
  ariaLabel?: string;
  disabled?: boolean;
  onClick?: () => void;
}) {
  return (
    <button
      type="button"
      className={['image-canvas-editor__option-popover-choice', className]
        .filter(Boolean)
        .join(' ')}
      aria-label={ariaLabel}
      aria-pressed={selected}
      disabled={disabled}
      onClick={onClick}
    >
      {children}
    </button>
  );
}

export function ImageCanvasCharacterAnimationPanelView({
  panel,
  sourceLayer,
  style,
  price,
  setCharacterAnimationPanel,
  onUpdateDuration,
  onSubmit,
  showParameters = true,
}: ImageCanvasCharacterAnimationPanelViewProps) {
  const [isParameterMenuOpen, setIsParameterMenuOpen] = useState(false);
  const parameterButtonRef = useRef<HTMLButtonElement | null>(null);
  const isGenerating = panel.status === 'generating';
  const ratioLabel = getRatioLabel(panel.ratio);
  const dismissParameterMenu = useCallback(() => {
    setIsParameterMenuOpen(false);
  }, []);

  useImageCanvasFloatingOptionDismiss({
    isOpen: isParameterMenuOpen,
    boundaryRefs: [parameterButtonRef],
    onDismiss: dismissParameterMenu,
  });

  const updatePanel = (patch: Partial<CharacterAnimationPanelState>) => {
    setCharacterAnimationPanel((currentPanel) =>
      currentPanel
        ? {
            ...resetFailedPanelStatus(currentPanel),
            ...patch,
          }
        : currentPanel,
    );
  };
  const closePanel = () => {
    setCharacterAnimationPanel((currentPanel) =>
      currentPanel && isGenerating ? currentPanel : null,
    );
  };

  return (
    <>
      <div
        className="image-canvas-editor__character-animation-panel image-canvas-editor__generation-composer image-canvas-editor__generation-composer--image image-canvas-editor__generation-composer--character-animation"
        style={style}
        role="dialog"
        aria-label="角色动画生成面板"
        onPointerDown={(event) => event.stopPropagation()}
      >
        <div className="image-canvas-editor__reference-strip">
          <ImageCanvasReferenceSlot
            tone="character"
            icon={<ImageIcon className="h-4 w-4" aria-hidden="true" />}
            imageSrc={sourceLayer.src}
            objectKey={sourceLayer.objectKey}
            label={sourceLayer.title}
            ariaLabel={sourceLayer.title}
            title={sourceLayer.title}
          />
        </div>
        <EditorIconButton
          className="image-canvas-editor__generation-close"
          label="关闭角色动画生成面板"
          title="关闭"
          icon={X}
          variant="surfaceFloating"
          disabled={isGenerating}
          onClick={closePanel}
        />
        <AutoGrowTextArea
          aria-label="动画描述"
          value={panel.promptText}
          maxLength={4000}
          disabled={isGenerating}
          placeholder="你希望角色做什么动作？"
          className="max-h-64 image-canvas-editor__generation-prompt image-canvas-editor__character-animation-textarea"
          onValueChange={(value) => updatePanel({ promptText: value })}
        />
        <div className="image-canvas-editor__character-animation-presets">
          {CHARACTER_ANIMATION_ACTION_PROMPTS.map((preset) => (
            <button
              key={preset.label}
              type="button"
              className="image-canvas-editor__character-animation-preset"
              disabled={isGenerating}
              onClick={() =>
                setCharacterAnimationPanel((currentPanel) =>
                  currentPanel
                    ? {
                        ...currentPanel,
                        promptText: preset.text,
                        status: 'idle',
                        errorMessage: undefined,
                      }
                    : currentPanel,
                )
              }
            >
              {preset.label}
            </button>
          ))}
        </div>
        <div className="image-canvas-editor__character-animation-footer">
          {showParameters ? (
            <div className="image-canvas-editor__option-popover-anchor image-canvas-editor__option-popover-anchor--dimensions">
              <PlatformInlineOptionButton
                ref={parameterButtonRef}
                className="image-canvas-editor__option-cluster image-canvas-editor__option-cluster--dimensions"
                aria-label={`动画参数 ${ratioLabel} · ${panel.durationSeconds}秒 · ${panel.resolution}`}
                aria-expanded={isParameterMenuOpen}
                disabled={isGenerating}
                trailingIcon={<ChevronDown className="h-3 w-3" />}
                onClick={() => setIsParameterMenuOpen((open) => !open)}
              >
                {ratioLabel} · {panel.durationSeconds}秒 · {panel.resolution}
              </PlatformInlineOptionButton>
            </div>
          ) : null}
          <PlatformActionButton
            type="button"
            tone="secondary"
            size="xs"
            shape="pill"
            className="image-canvas-editor__character-animation-submit"
            disabled={isGenerating}
            onClick={() => {
              if (!isGenerating) {
                onSubmit();
              }
            }}
          >
            {isGenerating ? '生成中' : `生成${price}泥点`}
          </PlatformActionButton>
        </div>
        <span
          className="image-canvas-editor__character-animation-summary-text"
          title={panel.promptText.trim() || undefined}
          aria-label={`生成文本：${panel.promptText.trim() || '动画描述'}`}
        >
          {panel.promptText.trim() ? panel.promptText.trim() : '动画描述'}
        </span>
        {panel.status === 'completed' && panel.result ? (
          <PlatformStatusMessage
            tone="success"
            surface="platform"
            size="xs"
            role="status"
          >
            已生成 {panel.result.frameCount} 帧
          </PlatformStatusMessage>
        ) : null}
        {panel.status === 'failed' ? (
          <PlatformStatusMessage
            tone="error"
            surface="platform"
            size="xs"
            role="alert"
          >
            {panel.errorMessage}
          </PlatformStatusMessage>
        ) : null}
      </div>
      {showParameters && isParameterMenuOpen
        ? renderPanelPortal(
            <PlatformFloatingMenu
              className="image-canvas-editor__option-popover image-canvas-editor__portal-menu"
              label="动画参数选项"
              placement="top-start"
              style={buildLocalMenuStyle(parameterButtonRef.current)}
              onPointerDown={(event) => event.stopPropagation()}
            >
              <div className="image-canvas-editor__option-popover-sections">
                <section className="image-canvas-editor__option-popover-section">
                  <span className="image-canvas-editor__option-popover-title">
                    比例
                  </span>
                  <div className="image-canvas-editor__option-popover-items image-canvas-editor__option-popover-items--card">
                    {CHARACTER_ANIMATION_RATIO_OPTIONS.map((option) => (
                      <AnimationOptionChoice
                        key={option.value}
                        selected={panel.ratio === option.value}
                        disabled={isGenerating}
                        className="image-canvas-editor__option-popover-choice--ratio"
                        ariaLabel={`比例 ${getRatioLabel(option.value)}`}
                        onClick={() => updatePanel({ ratio: option.value })}
                      >
                        <span
                          className="image-canvas-editor__ratio-wireframe"
                          data-ratio={option.value}
                          aria-hidden="true"
                        />
                        <span>{getRatioLabel(option.value)}</span>
                      </AnimationOptionChoice>
                    ))}
                  </div>
                </section>
                <section className="image-canvas-editor__option-popover-section">
                  <span className="image-canvas-editor__option-popover-title">
                    时长
                  </span>
                  <div className="image-canvas-editor__option-popover-items">
                    {CHARACTER_ANIMATION_DURATION_OPTIONS.map((option) => (
                      <AnimationOptionChoice
                        key={option.frameCount}
                        selected={panel.frameCount === option.frameCount}
                        disabled={isGenerating}
                        ariaLabel={`时长 ${option.label}`}
                        onClick={() =>
                          onUpdateDuration(String(option.frameCount))
                        }
                      >
                        {option.label}
                      </AnimationOptionChoice>
                    ))}
                  </div>
                </section>
                <section className="image-canvas-editor__option-popover-section">
                  <span className="image-canvas-editor__option-popover-title">
                    清晰度
                  </span>
                  <div className="image-canvas-editor__option-popover-items">
                    {(
                      ['480p', '720p'] as EditorCharacterAnimationResolution[]
                    ).map((resolution) => (
                      <AnimationOptionChoice
                        key={resolution}
                        selected={panel.resolution === resolution}
                        disabled={isGenerating}
                        ariaLabel={`清晰度 ${resolution}`}
                        onClick={() => updatePanel({ resolution })}
                      >
                        {resolution}
                      </AnimationOptionChoice>
                    ))}
                  </div>
                </section>
              </div>
            </PlatformFloatingMenu>,
          )
        : null}
    </>
  );
}