import {
  CameraOutlined,
  ClockCircleOutlined,
  ColumnWidthOutlined,
  CustomerServiceOutlined,
  DashboardOutlined,
  DeleteOutlined,
  EditOutlined,
  HighlightOutlined,
  MessageOutlined,
  SwapOutlined,
  ThunderboltOutlined,
  VideoCameraOutlined,
} from "@ant-design/icons";
import type { CSSProperties, ReactNode } from "react";
import { useCallback, useEffect, useState } from "react";
import "../../styles/pages/more.css";
import type { WebImageWorkbenchTool, WebViewKey } from "../../types";

interface MorePageProps {
  onSelectView?: (view: WebViewKey) => void;
  onOpenImageTool?: (tool: WebImageWorkbenchTool) => void;
}

type ToolCategory = "image" | "video";
type FilterKey = "all" | ToolCategory | "upcoming";

interface MoreTool {
  id: string;
  title: string;
  text: string;
  useCase: string;
  tags: string[];
  icon: ReactNode;
  category: ToolCategory;
  target?: WebViewKey;
  imageTool?: WebImageWorkbenchTool;
  ready: boolean;
  badge?: string;
  featured?: boolean;
}

type CompareScene =
  | "workbench"
  | "inpaint"
  | "camera"
  | "upscale"
  | "watermark"
  | "dialog"
  | "subtitle"
  | "digital-human"
  | "character"
  | "avatar";

const toolCompareScenes: Record<string, CompareScene> = {
  workbench: "workbench",
  inpaint: "inpaint",
  camera: "camera",
  upscale: "upscale",
  watermarkRemoval: "watermark",
  dialogGenerator: "dialog",
  subtitleRemoval: "subtitle",
  digitalHuman: "digital-human",
  characterMix: "character",
  avatarConsole: "avatar",
};

function ToolComparePanel({ scene }: { scene: CompareScene }) {
  return (
    <span className={`more-card__compare more-card__compare--${scene}`} aria-hidden="true">
      <span className="more-card__compare-labels">
        <span>Before</span>
        <span>After</span>
      </span>
      <span className="more-card__compare-stage">
        <span className="more-card__compare-side more-card__compare-side--before">
          <span className="more-card__scene-subject" />
          <span className="more-card__scene-detail" />
          <span className="more-card__scene-overlay" />
        </span>
        <span className="more-card__compare-divider">
          <span />
        </span>
        <span className="more-card__compare-side more-card__compare-side--after">
          <span className="more-card__scene-subject" />
          <span className="more-card__scene-detail" />
          <span className="more-card__scene-overlay" />
        </span>
      </span>
    </span>
  );
}

const tools: MoreTool[] = [
  { id: "workbench", title: "图片工作台", text: "融合、修复、局部增强", useCase: "适合商品图精修、创意合成和局部画面重做", tags: ["热门", "一站式", "商品图"], icon: <EditOutlined />, category: "image", imageTool: "workbench", ready: true, featured: true },
  { id: "inpaint", title: "局部重绘", text: "修掉瑕疵、替换物体、重做局部画面", useCase: "适合快速处理商品瑕疵、人物细节和背景杂物", tags: ["新手推荐", "精修"], icon: <HighlightOutlined />, category: "image", imageTool: "inpaint", ready: true },
  { id: "camera", title: "镜头实验室", text: "快速生成俯拍、特写、广角等商业镜头", useCase: "适合做产品主图、种草图和不同机位方案", tags: ["电商常用", "镜头"], icon: <CameraOutlined />, category: "image", imageTool: "camera", ready: true },
  { id: "upscale", title: "分辨率提升", text: "把低清图片或视频提升到可交付质感", useCase: "适合修复旧素材、放大商品图和增强短视频清晰度", tags: ["高清", "交付前"], icon: <ColumnWidthOutlined />, category: "image", target: "resolutionUpscale", ready: true },
  { id: "watermarkRemoval", title: "去水印", text: "智能去除图片水印、文字和遮挡元素", useCase: "适合整理素材、清理参考图和恢复画面干净度", tags: ["素材清理", "高频"], icon: <DeleteOutlined />, category: "image", target: "watermarkRemoval", ready: true },
  { id: "dialogGenerator", title: "交互式对话框生成器", text: "上传背景图，快速制作可拖拽编辑的对话框", useCase: "适合剧情海报、社媒截图和角色对白设计", tags: ["内容创作", "可编辑"], icon: <MessageOutlined />, category: "image", target: "dialogGenerator", ready: true },
  { id: "subtitleRemoval", title: "字幕去除", text: "擦除视频字幕，让画面重新变干净", useCase: "适合二创前素材整理、短视频重剪和画面修复", tags: ["视频增强", "素材清理"], icon: <DeleteOutlined />, category: "video", target: "subtitleRemoval", ready: true },
  { id: "digitalHuman", title: "数字人", text: "用一张人像和音频生成口播视频", useCase: "适合品牌讲解、课程口播和带货短视频", tags: ["热门", "口播", "视频"], icon: <CustomerServiceOutlined />, category: "video", target: "digitalHuman", ready: true, featured: true },
  { id: "characterMix", title: "角色迁移", text: "把人物图迁移到参考视频的动作里", useCase: "适合角色短片、动作复刻和虚拟人内容生产", tags: ["角色视频", "动作"], icon: <SwapOutlined />, category: "video", target: "characterMix", ready: true },
  { id: "avatarConsole", title: "数字人控制台", text: "管理形象、播报、互动与接入配置", useCase: "适合持续运营数字人、配置品牌形象和复用口播模板", tags: ["运营台", "企业"], icon: <DashboardOutlined />, category: "video", target: "avatarConsole", ready: true },
];

interface FeaturedTool {
  id: string;
  title: string;
  desc: string;
  kicker: string;
  steps: string[];
  outcome: string;
  icon: ReactNode;
  imageTool?: WebImageWorkbenchTool;
  target?: WebViewKey;
  category: ToolCategory;
  gradient: string;
}

const featuredTools: FeaturedTool[] = [
  {
    id: "workbench",
    title: "图片工作台",
    desc: "从一张素材开始，完成精修、合成和二次创作。",
    kicker: "图片精修工作流",
    steps: ["上传素材", "局部修复", "高清导出"],
    outcome: "适合商品图、海报图和创意视觉",
    icon: <EditOutlined />,
    imageTool: "workbench",
    category: "image",
    gradient: "linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.06))",
  },
  {
    id: "digitalHuman",
    title: "数字人",
    desc: "用参考人像和音频，快速生成可交付口播视频。",
    kicker: "口播视频工作流",
    steps: ["选择人像", "上传音频", "生成视频"],
    outcome: "适合品牌讲解、课程和带货短视频",
    icon: <CustomerServiceOutlined />,
    target: "digitalHuman",
    category: "video",
    gradient: "linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(6, 182, 212, 0.06))",
  },
];

const categoryLabels: Record<ToolCategory, string> = {
  image: "图像创作",
  video: "视频生成",
};

const categoryIcons: Record<ToolCategory, ReactNode> = {
  image: <EditOutlined />,
  video: <VideoCameraOutlined />,
};

const filters: { key: FilterKey; label: string }[] = [
  { key: "all", label: "全部" },
  { key: "image", label: "图像" },
  { key: "video", label: "视频" },
  { key: "upcoming", label: "即将上线" },
];

const RECENT_STORAGE_KEY = "omniai:more-recent-tools";
const MAX_RECENT = 4;

function getRecentToolIds(): string[] {
  try {
    const raw = localStorage.getItem(RECENT_STORAGE_KEY);
    return raw ? JSON.parse(raw) : [];
  } catch { return []; }
}

function pushRecentToolId(id: string) {
  const ids = getRecentToolIds().filter((x) => x !== id);
  ids.unshift(id);
  localStorage.setItem(RECENT_STORAGE_KEY, JSON.stringify(ids.slice(0, MAX_RECENT)));
}

function MorePage({ onSelectView, onOpenImageTool }: MorePageProps) {
  const [filter, setFilter] = useState<FilterKey>("all");
  const [recentIds, setRecentIds] = useState<string[]>(getRecentToolIds);

  useEffect(() => {
    setRecentIds(getRecentToolIds());
  }, []);

  const openTool = useCallback((tool: MoreTool) => {
    if (!tool.ready) return;
    pushRecentToolId(tool.id);
    setRecentIds(getRecentToolIds());
    if (tool.imageTool && onOpenImageTool) {
      onOpenImageTool(tool.imageTool);
      return;
    }
    if (tool.target && onSelectView) {
      onSelectView(tool.target);
    }
  }, [onOpenImageTool, onSelectView]);

  const openFeaturedTool = useCallback((tool: FeaturedTool) => {
    pushRecentToolId(tool.id);
    setRecentIds(getRecentToolIds());
    if (tool.imageTool && onOpenImageTool) {
      onOpenImageTool(tool.imageTool);
      return;
    }
    if (tool.target && onSelectView) {
      onSelectView(tool.target);
    }
  }, [onOpenImageTool, onSelectView]);

  const filteredTools = tools.filter((t) => {
    if (t.featured) return false;
    if (filter === "all") return true;
    if (filter === "upcoming") return !t.ready;
    return t.category === filter;
  });

  const filterCounts: Record<FilterKey, number> = {
    all: tools.filter((t) => !t.featured).length,
    image: tools.filter((t) => !t.featured && t.category === "image").length,
    video: tools.filter((t) => !t.featured && t.category === "video").length,
    upcoming: tools.filter((t) => !t.featured && !t.ready).length,
  };

  const recentTools = recentIds
    .map((id) => tools.find((t) => t.id === id))
    .filter((t): t is MoreTool => Boolean(t) && (t?.ready ?? false));

  const groupedTools = filteredTools.reduce<Record<ToolCategory, MoreTool[]>>((acc, t) => {
    if (!acc[t.category]) acc[t.category] = [];
    acc[t.category].push(t);
    return acc;
  }, {} as Record<ToolCategory, MoreTool[]>);

  const activeFilterLabel = filters.find((item) => item.key === filter)?.label ?? "全部";
  const hasGroupedTools = (["image", "video"] as ToolCategory[]).some((cat) => groupedTools[cat]?.length);

  return (
    <div className="more-page-v2">
      <header className="more-page-v2__header">
        <div className="more-page-v2__title-group">
          <span className="more-page-v2__eyebrow">AI Tool Hub</span>
          <h1>工具盒</h1>
        </div>
        <div className="more-page-v2__header-meta" aria-label="工具盒概览">
          <span>{tools.filter((tool) => tool.ready).length} 个可用工具</span>
          <span>{featuredTools.length} 个核心入口</span>
        </div>
        <nav className="more-page-v2__filters" aria-label="工具分类筛选">
          {filters.map((f) => (
            <button
              key={f.key}
              type="button"
              className={filter === f.key ? "is-active" : ""}
              aria-pressed={filter === f.key}
              onClick={() => setFilter(f.key)}
            >
              <span>{f.label}</span>
              <em>{filterCounts[f.key]}</em>
            </button>
          ))}
        </nav>
      </header>

      <div className="more-page-v2__scroll">
        {recentTools.length > 0 && filter === "all" && (
          <section className="more-page-v2__section">
            <h2 className="more-page-v2__section-title">
              <ClockCircleOutlined /> 最近使用
              <span>继续使用</span>
            </h2>
            <div className="more-page-v2__recent-row">
              {recentTools.map((tool) => (
                <button
                  key={tool.id}
                  type="button"
                  className="more-card more-card--recent"
                  aria-label={`打开最近使用工具：${tool.title}`}
                  onClick={() => openTool(tool)}
                >
                  <span className="more-card__icon">{tool.icon}</span>
                  <span className="more-card__recent-body">
                    <strong>{tool.title}</strong>
                    <small>{categoryLabels[tool.category]}</small>
                  </span>
                </button>
              ))}
            </div>
          </section>
        )}

        {filter === "all" && (
          <section className="more-page-v2__section more-page-v2__featured">
            <h2 className="more-page-v2__section-title">
              <ThunderboltOutlined /> 核心工具
            </h2>
            <div className="more-page-v2__featured-grid">
              {featuredTools.map((tool) => (
                <button
                  key={tool.id}
                  type="button"
                  className="more-card more-card--featured"
                  style={{ "--card-gradient": tool.gradient } as CSSProperties}
                  aria-label={`打开核心工具：${tool.title}，${tool.desc}`}
                  onClick={() => openFeaturedTool(tool)}
                >
                  <span className="more-card__featured-icon">{tool.icon}</span>
                  <div className="more-card__featured-body">
                    <span className="more-card__featured-kicker">{tool.kicker}</span>
                    <strong>{tool.title}</strong>
                    <ToolComparePanel scene={toolCompareScenes[tool.id]} />
                    <span className="more-card__featured-desc">{tool.desc}</span>
                    <span className="more-card__steps" aria-hidden="true">
                      {tool.steps.map((step) => (
                        <span key={step}>{step}</span>
                      ))}
                    </span>
                    <span className="more-card__outcome">{tool.outcome}</span>
                    <span className="more-card__cta">开始使用 →</span>
                  </div>
                </button>
              ))}
            </div>
          </section>
        )}

        {(["image", "video"] as ToolCategory[]).map((cat) => {
          const group = groupedTools[cat];
          if (!group || group.length === 0) return null;
          return (
            <section key={cat} className="more-page-v2__section">
              <h2 className="more-page-v2__section-title">
                {categoryIcons[cat]} {categoryLabels[cat]}
                <span>{group.length}</span>
              </h2>
              <div className="more-page-v2__grid">
                {group.map((tool) => (
                  <button
                    key={tool.id}
                    type="button"
                    className={`more-card${tool.ready ? " more-card--ready" : " more-card--pending"}`}
                    aria-label={tool.ready ? `打开工具：${tool.title}，${tool.text}` : `${tool.title}暂未开放`}
                    onClick={() => openTool(tool)}
                    disabled={!tool.ready}
                  >
                    <span className="more-card__icon">{tool.icon}</span>
                    <span className="more-card__topline">
                      {tool.tags.slice(0, 2).map((tag) => (
                        <span key={tag}>{tag}</span>
                      ))}
                    </span>
                    <strong>{tool.title}</strong>
                    <ToolComparePanel scene={toolCompareScenes[tool.id]} />
                    <span className="more-card__desc">{tool.text}</span>
                    <span className="more-card__use-case">{tool.useCase}</span>
                    <span className="more-card__action">打开工具 →</span>
                    {tool.badge && <span className="more-card__badge">{tool.badge}</span>}
                  </button>
                ))}
              </div>
            </section>
          );
        })}

        {!hasGroupedTools && (
          <section className="more-page-v2__section">
            <div className="more-page-v2__empty">
              <span className="more-page-v2__empty-icon">
                <ClockCircleOutlined />
              </span>
              <strong>{activeFilterLabel}工具正在整理中</strong>
              <p>当前分类暂无可展示入口，后续能力上线后会在这里集中呈现。</p>
              <button type="button" className="more-page-v2__empty-action" onClick={() => setFilter("all")}>
                查看全部可用工具
              </button>
            </div>
          </section>
        )}
      </div>
    </div>
  );
}

export default MorePage;
