import { tmdbImageUrl } from "@umt/contracts";
import type { LucideIcon } from "lucide-react";
import { Clapperboard, Film, Layers, Tv } from "lucide-react";
import { type ReactNode, useState } from "react";
import { StatusBadge, type StatusTone } from "~/components/console/status-badge.tsx";
import { cn } from "~/lib/utils.ts";

// W3-2 页面内的小零件:区块卡片、标签胶囊、多选胶囊、封面占位。

/** 内容卡:pg-slab + 标题行。卡内子块用 border 分隔,不再叠玻璃 */
export function Panel({
  title,
  description,
  actions,
  children,
  className,
  bodyClassName,
}: {
  title?: ReactNode;
  description?: ReactNode;
  actions?: ReactNode;
  children: ReactNode;
  className?: string;
  bodyClassName?: string;
}) {
  return (
    <section className={cn("pg-slab min-w-0 rounded-xl", className)}>
      {title || actions ? (
        <header className="flex flex-wrap items-start justify-between gap-2 border-b border-border/60 px-4 py-3 sm:px-5">
          <div className="min-w-0">
            {title ? <h2 className="text-body font-semibold text-foreground">{title}</h2> : null}
            {description ? <p className="mt-0.5 text-meta text-muted-foreground">{description}</p> : null}
          </div>
          {actions ? <div className="flex flex-wrap items-center gap-2">{actions}</div> : null}
        </header>
      ) : null}
      <div className={cn("px-4 py-4 sm:px-5", bodyClassName)}>{children}</div>
    </section>
  );
}

/** 中性小标签(规则摘要、别名等),不是状态 */
export function Chip({ children, className, mono }: { children: ReactNode; className?: string; mono?: boolean }) {
  return (
    <span
      className={cn(
        "inline-flex max-w-full items-center gap-1 rounded-full border border-border bg-foreground/[0.03] px-2 py-0.5 text-meta break-all text-foreground",
        mono && "font-mono",
        className,
      )}
    >
      {children}
    </span>
  );
}

export function ChipList({ items, empty = "未设置" }: { items: ReactNode[]; empty?: string }) {
  if (items.length === 0) return <span className="text-meta text-muted-foreground">{empty}</span>;
  return (
    <div className="flex flex-wrap gap-1.5">
      {items.map((it, i) => (
        <Chip key={i}>{it}</Chip>
      ))}
    </div>
  );
}

/** 语气 + 文案的状态徽章(label 映射表里的 {label,tone}) */
export function Tone({ v, className }: { v: { label: string; tone: StatusTone } | undefined; className?: string }) {
  if (!v) return <StatusBadge className={className}>未知</StatusBadge>;
  return (
    <StatusBadge tone={v.tone} className={className}>
      {v.label}
    </StatusBadge>
  );
}

/** 多选胶囊:选中用静态 pill-selected;ordered 时显示选择顺序(软偏好"越靠前越好") */
export function ChipToggleGroup<T extends string>({
  options,
  value,
  onChange,
  ordered = false,
  label,
}: {
  options: readonly { value: T; label: string }[];
  value: readonly T[];
  onChange: (v: T[]) => void;
  ordered?: boolean;
  label: string;
}) {
  return (
    <fieldset aria-label={label} className="m-0 flex min-w-0 flex-wrap gap-1.5 border-0 p-0">
      {options.map((o) => {
        const idx = value.indexOf(o.value);
        const on = idx >= 0;
        return (
          <button
            key={o.value}
            type="button"
            aria-pressed={on}
            onClick={() => onChange(on ? value.filter((v) => v !== o.value) : [...value, o.value])}
            className={cn(
              "inline-flex h-7 cursor-pointer items-center gap-1 rounded-full border px-2.5 text-meta font-medium transition-[background-color,color,transform] duration-micro active:scale-[0.96]",
              on
                ? "pill-selected text-foreground"
                : "border-border text-muted-foreground hover:bg-foreground/[0.06] hover:text-foreground",
            )}
          >
            {ordered && on ? <span className="tabular-nums text-muted-foreground">{idx + 1}.</span> : null}
            {o.label}
          </button>
        );
      })}
    </fieldset>
  );
}

const KIND_ICON: Record<string, LucideIcon> = { movie: Film, series: Tv, variety: Clapperboard, collection: Layers };

/** media_entity.metadata 里的最终海报路径(metadata.posterPath.value) */
export function posterPathOf(metadata: unknown): string | null {
  const v = (metadata as { posterPath?: { value?: unknown } } | null)?.posterPath?.value;
  return typeof v === "string" && v ? v : null;
}

/**
 * 封面:有 TMDB 海报路径时经图片代理显示海报,加载失败或没有海报时回退无彩占位(类型图标 + 首字)。
 */
export function CoverPlaceholder({
  title,
  kind,
  small = false,
  className,
  posterPath,
}: {
  title: string;
  kind: string;
  /** 列表缩略:只显示首字,不叠类型图标 */
  small?: boolean;
  className?: string;
  /** TMDB poster_path */
  posterPath?: string | null | undefined;
}) {
  const [failed, setFailed] = useState(false);
  const src = failed ? null : tmdbImageUrl(posterPath, small ? "w154" : "w342");
  if (src) {
    return (
      <img
        src={src}
        alt=""
        loading="lazy"
        onError={() => setFailed(true)}
        className={cn("shrink-0 rounded-lg border border-border bg-foreground/[0.05] object-cover", className)}
      />
    );
  }
  const Icon = KIND_ICON[kind] ?? Film;
  const glyph = title.replace(/^w32-/, "").trim().charAt(0) || "?";
  return (
    <div
      aria-hidden
      className={cn(
        "relative grid shrink-0 place-items-center overflow-hidden rounded-lg border border-border bg-foreground/[0.05] text-muted-foreground",
        className,
      )}
    >
      <span className={cn("font-semibold text-foreground/35", small ? "text-lead" : "text-title")}>{glyph}</span>
      {small ? null : <Icon className="absolute right-1.5 bottom-1.5 h-3.5 w-3.5 opacity-60" />}
    </div>
  );
}

/** 细线进度(不做实心填充) */
export function ProgressLine({ value, className }: { value: number; className?: string }) {
  const pct = Math.max(0, Math.min(1, value)) * 100;
  return (
    <div className={cn("h-1 w-full overflow-hidden rounded-full bg-foreground/[0.08]", className)}>
      <div className="h-full rounded-full bg-foreground/60" style={{ width: `${pct}%` }} />
    </div>
  );
}

/** 相对时间("3 小时前"),给列表用;详情仍用 formatDateTime */
export function relTime(iso: string | null | undefined): string {
  if (!iso) return "—";
  const t = new Date(iso).getTime();
  if (Number.isNaN(t)) return iso;
  const s = Math.round((Date.now() - t) / 1000);
  const abs = Math.abs(s);
  const suffix = s >= 0 ? "前" : "后";
  if (abs < 60) return "刚刚";
  if (abs < 3600) return `${Math.round(abs / 60)} 分钟${suffix}`;
  if (abs < 86400) return `${Math.round(abs / 3600)} 小时${suffix}`;
  if (abs < 86400 * 30) return `${Math.round(abs / 86400)} 天${suffix}`;
  return new Date(iso).toLocaleDateString("zh-CN");
}

/** 逗号/顿号/空白分隔的列表 */
export const splitList = (s: string) =>
  s
    .split(/[,，、\s]+/)
    .map((x) => x.trim())
    .filter(Boolean);