import {
  FileImageOutlined,
  PlusOutlined,
  ThunderboltOutlined,
  VideoCameraOutlined,
} from "@ant-design/icons";
import { useMemo, useRef, useState, type ChangeEvent, type DragEvent, type KeyboardEvent, type MouseEvent as ReactMouseEvent, type RefObject } from "react";
import { createPortal } from "react-dom";
import EcommerceVideoWorkspace from "../EcommerceVideoWorkspace";

interface CloneImageItem {
  id: string;
  src: string;
  name: string;
  file?: File;
}

type CloneVideoQualityKey = "standard" | "high" | "ultra";

interface EcommerceOneClickVideoPanelProps {
  onClose: () => void;
  isAuthenticated: boolean;
  onRequestLogin: () => void;
  productImages: CloneImageItem[];
  productInputRef: RefObject<HTMLInputElement>;
  isProductUploadDragging: boolean;
  setIsProductUploadDragging: (value: boolean) => void;
  handleProductDrop: (event: DragEvent<HTMLDivElement>) => void;
  handleProductUpload: (event: ChangeEvent<HTMLInputElement>) => void;
  removeProductImage: (imageId: string) => void;
  maxProductImages: number;
  requirement: string;
  onRequirementChange: (value: string) => void;
  platform: string;
  platformOptions: string[];
  onPlatformChange: (value: string) => void;
  ratio: string;
  ratioOptions: string[];
  onRatioChange: (value: string) => void;
  videoQuality: CloneVideoQualityKey;
  videoQualityOptions: Array<{ key: CloneVideoQualityKey; label: string; desc: string }>;
  onVideoQualityChange: (value: CloneVideoQualityKey) => void;
  videoDuration: number;
  videoDurationMin: number;
  videoDurationMax: number;
  onVideoDurationChange: (value: number) => void;
  videoSmart: boolean;
  onVideoSmartChange: (value: boolean) => void;
  onOpenHistory: () => void;
}

function getVideoAspectRatio(ratio: string): string {
  if (ratio.includes("9:16")) return "9:16";
  if (ratio.includes("16:9")) return "16:9";
  if (ratio.includes("3:4")) return "3:4";
  return "9:16";
}

function openQuickUploadWithKeyboard(
  event: KeyboardEvent<HTMLDivElement>,
  inputRef: { current: HTMLInputElement | null },
) {
  if (event.key !== "Enter" && event.key !== " ") return;
  event.preventDefault();
  inputRef.current?.click();
}

export default function EcommerceOneClickVideoPanel({
  onClose,
  isAuthenticated,
  onRequestLogin,
  productImages,
  productInputRef,
  isProductUploadDragging,
  setIsProductUploadDragging,
  handleProductDrop,
  handleProductUpload,
  removeProductImage,
  maxProductImages,
  requirement,
  onRequirementChange,
  platform,
  platformOptions,
  onPlatformChange,
  ratio,
  ratioOptions,
  onRatioChange,
  videoQuality,
  videoQualityOptions,
  onVideoQualityChange,
  videoDuration,
  videoDurationMin,
  videoDurationMax,
  onVideoDurationChange,
  videoSmart,
  onVideoSmartChange,
  onOpenHistory,
}: EcommerceOneClickVideoPanelProps) {
  const [openSelect, setOpenSelect] = useState<"platform" | "ratio" | null>(null);
  const [planTrigger, setPlanTrigger] = useState(0);
  const [hoverZoom, setHoverZoom] = useState<{ src: string; x: number; y: number; placement: "right" | "left" } | null>(null);
  const selectAnchorRef = useRef<HTMLDivElement>(null);

  const productImageDataUrls = useMemo(() => productImages.map((img) => img.src), [productImages]);
  const productImageFiles = useMemo(() => productImages.map((img) => img.file), [productImages]);

  const canGenerate = productImages.length > 0 || requirement.trim().length > 0;

  const handleGenerate = () => {
    if (!isAuthenticated) {
      onRequestLogin();
      return;
    }
    setPlanTrigger((value) => value + 1);
  };

  const handlePlatformSelect = (value: string) => {
    onPlatformChange(value);
    setOpenSelect(null);
  };

  const handleRatioSelect = (value: string) => {
    onRatioChange(value);
    setOpenSelect(null);
  };

  const toggleSelect = (key: "platform" | "ratio") => {
    setOpenSelect((current) => (current === key ? null : key));
  };

  const handleThumbMouseEnter = (src: string, event: ReactMouseEvent<HTMLElement>) => {
    const rect = event.currentTarget.getBoundingClientRect();
    const previewWidth = 300;
    const previewHeight = 190;
    const gap = 12;
    const viewportWidth = window.innerWidth || document.documentElement.clientWidth;
    const viewportHeight = window.innerHeight || document.documentElement.clientHeight;
    const canShowRight = rect.right + gap + previewWidth <= viewportWidth - gap;
    const placement: "right" | "left" = canShowRight ? "right" : "left";
    const x = placement === "right" ? rect.right + gap : Math.max(gap, rect.left - gap);
    const y = Math.min(
      Math.max(rect.top + rect.height / 2, previewHeight / 2 + gap),
      Math.max(previewHeight / 2 + gap, viewportHeight - previewHeight / 2 - gap),
    );
    setHoverZoom({ src, x, y, placement });
  };

  const renderThumbs = () => (
    <div className="ecom-quick-upload-thumbs" aria-label="已上传商品原图">
      {productImages.map((item) => (
        <figure
          key={item.id}
          className="ecom-command-asset-thumb ecom-quick-upload-thumb"
          onMouseEnter={(event) => handleThumbMouseEnter(item.src, event)}
          onMouseLeave={() => setHoverZoom(null)}
        >
          <img src={item.src} alt={item.name} />
          <button
            type="button"
            className="ecom-hot-material-delete"
            aria-label="删除图片"
            onClick={(event) => {
              event.stopPropagation();
              setHoverZoom(null);
              removeProductImage(item.id);
            }}
          >
            ×
          </button>
        </figure>
      ))}
    </div>
  );

  return (
    <main className="ecom-one-click-video-page ecom-quick-hot-page ecom-quick-set-page ecom-tool-page-enter" aria-label="一键视频">
      <div className="ecom-quick-set-body">
        <aside className="ecom-quick-set-panel" aria-label="一键视频设置">
          <header className="ecom-quick-set-panel-head">
            <strong className="ecom-quick-set-page-title">
              <VideoCameraOutlined /> 一键视频
            </strong>
            <button type="button" className="ecom-quick-set-back" onClick={onClose}>
              首页
            </button>
            <button type="button" className="ecom-quick-set-back" onClick={onClose}>
              上一页
            </button>
          </header>

          <section>
            <strong><FileImageOutlined /> 上传商品原图</strong>
            {productImages.length ? (
              <div
                role="button"
                tabIndex={0}
                className={`ecom-quick-set-upload ecom-quick-hot-material has-images${isProductUploadDragging ? " is-dragging" : ""}`}
                onClick={() => productInputRef.current?.click()}
                onKeyDown={(event) => openQuickUploadWithKeyboard(event, productInputRef)}
                onDragOver={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  if (event.dataTransfer.types.includes("Files")) setIsProductUploadDragging(true);
                }}
                onDragLeave={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  if (event.currentTarget === event.target || !event.currentTarget.contains(event.relatedTarget as Node)) {
                    setIsProductUploadDragging(false);
                  }
                }}
                onDrop={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  setIsProductUploadDragging(false);
                  handleProductDrop(event);
                }}
              >
                {renderThumbs()}
                {productImages.length < maxProductImages ? (
                  <button
                    type="button"
                    className="ecom-quick-hot-add-btn"
                    aria-label="添加更多素材"
                    onClick={(event) => {
                      event.stopPropagation();
                      productInputRef.current?.click();
                    }}
                  >
                    <PlusOutlined />
                  </button>
                ) : null}
              </div>
            ) : (
              <div
                role="button"
                tabIndex={0}
                className={`ecom-quick-set-upload ecom-quick-hot-material${isProductUploadDragging ? " is-dragging" : ""}`}
                onClick={() => productInputRef.current?.click()}
                onKeyDown={(event) => openQuickUploadWithKeyboard(event, productInputRef)}
                onDragOver={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  if (event.dataTransfer.types.includes("Files")) setIsProductUploadDragging(true);
                }}
                onDragLeave={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  if (event.currentTarget === event.target || !event.currentTarget.contains(event.relatedTarget as Node)) {
                    setIsProductUploadDragging(false);
                  }
                }}
                onDrop={(event) => {
                  event.preventDefault();
                  event.stopPropagation();
                  setIsProductUploadDragging(false);
                  handleProductDrop(event);
                }}
              >
                <FileImageOutlined />
                <span>拖拽或点击上传</span>
                <em>上传商品素材图，最多 {maxProductImages} 张</em>
                <b>+ 上传图片</b>
              </div>
            )}
            <input
              ref={productInputRef}
              type="file"
              accept="image/*"
              multiple
              className="ecom-command-hidden-file"
              onChange={handleProductUpload}
              aria-label="上传商品图片"
            />
          </section>

          <section className="ecom-quick-hot-requirement">
            <div className="ecom-quick-hot-requirement__head">
              <strong>视频需求</strong>
            </div>
            <div className="ecom-quick-hot-requirement__input">
              <textarea
                value={requirement}
                onChange={(event) => onRequirementChange(event.target.value.slice(0, 500))}
                placeholder="建议包含以下信息：产品名称、核心卖点、期望场景、口播风格、具体参数"
                maxLength={500}
                rows={4}
              />
              <span>{requirement.length}/500</span>
            </div>
          </section>

          <section className="ecom-quick-set-basic-section">
            <span className="ecom-quick-set-label">基础设置</span>
            <div className="ecom-quick-set-select-anchor" ref={selectAnchorRef}>
              <div className="ecom-quick-set-selects">
                <button
                  type="button"
                  className={openSelect === "platform" ? "is-active" : ""}
                  onClick={() => toggleSelect("platform")}
                >
                  <span>平台</span>
                  <strong>{platform}</strong>
                  <em>⌄</em>
                </button>
                <button
                  type="button"
                  className={openSelect === "ratio" ? "is-active" : ""}
                  onClick={() => toggleSelect("ratio")}
                >
                  <span>尺寸比例</span>
                  <strong>{ratio.replace(/\s+/g, " ").trim()}</strong>
                  <em>⌄</em>
                </button>
              </div>
              {openSelect ? (
                <div
                  className="ecom-quick-set-dropdown"
                  role="listbox"
                  aria-label={openSelect === "platform" ? "平台" : "尺寸比例"}
                >
                  {(openSelect === "platform" ? platformOptions : ratioOptions).map((option) => (
                    <button
                      key={option}
                      type="button"
                      className={
                        (openSelect === "platform" ? platform === option : ratio === option) ? "is-active" : ""
                      }
                      role="option"
                      aria-selected={openSelect === "platform" ? platform === option : ratio === option}
                      onClick={() => {
                        if (openSelect === "platform") {
                          handlePlatformSelect(option);
                        } else {
                          handleRatioSelect(option);
                        }
                      }}
                    >
                      {option.replace(/\s+/g, " ").trim()}
                    </button>
                  ))}
                </div>
              ) : null}
            </div>
          </section>

          <section>
            <strong>视频画质</strong>
            <div className="ecom-quick-detail-modules">
              {videoQualityOptions.map((option) => (
                <button
                  key={option.key}
                  type="button"
                  className={videoQuality === option.key ? "is-active" : ""}
                  aria-pressed={videoQuality === option.key}
                  onClick={() => onVideoQualityChange(option.key)}
                >
                  <strong>{option.label}</strong>
                  <span>{option.desc}</span>
                </button>
              ))}
            </div>
          </section>

          <section>
            <strong>视频时长</strong>
            <div className="ecom-one-click-video-duration">
              <span>{videoDuration} 秒</span>
              <input
                type="range"
                className="ecom-one-click-video-range"
                min={videoDurationMin}
                max={videoDurationMax}
                step={5}
                value={videoDuration}
                onChange={(event) => onVideoDurationChange(Number(event.target.value))}
                aria-label="视频时长"
              />
              <div className="ecom-one-click-video-duration-scale" aria-hidden="true">
                <span>{videoDurationMin}秒</span>
                <span>{videoDurationMax}秒</span>
              </div>
            </div>
          </section>

          <section>
            <button
              type="button"
              className={`ecom-one-click-video-smart${videoSmart ? " is-on" : ""}`}
              aria-pressed={videoSmart}
              onClick={() => onVideoSmartChange(!videoSmart)}
            >
              <span>
                <strong>智能优化</strong>
                <em>根据平台、商品图和尺寸自动匹配推荐参数</em>
              </span>
              <i aria-hidden="true" />
            </button>
          </section>

          <div className="ecom-quick-hot-actions">
            <button
              type="button"
              className="ecom-quick-set-primary ecom-one-click-video-generate"
              onClick={handleGenerate}
              disabled={!canGenerate}
            >
              <ThunderboltOutlined /> {isAuthenticated ? "一键生成视频" : "登录后生成"}
            </button>
          </div>
        </aside>
        {hoverZoom && typeof document !== "undefined"
          ? createPortal(
              <div
                className={`ecom-hot-material-zoom-portal is-${hoverZoom.placement}`}
                style={{ left: hoverZoom.x, top: hoverZoom.y }}
              >
                <img src={hoverZoom.src} alt="" />
              </div>,
              document.body,
            )
          : null}

        <section className="ecom-quick-set-stage">
          <EcommerceVideoWorkspace
            isAuthenticated={isAuthenticated}
            productImageDataUrls={productImageDataUrls}
            productImageFiles={productImageFiles}
            requirement={requirement}
            platform={platform}
            aspectRatio={getVideoAspectRatio(ratio)}
            durationSeconds={videoDuration}
            resolution={videoQuality === "standard" ? "720P" : "1080P"}
            onRequestLogin={onRequestLogin}
            onOpenHistory={onOpenHistory}
            triggerPlan={planTrigger}
          />
        </section>
      </div>
    </main>
  );
}