import { useEffect, useState } from "react";
import type { BillingSummary, Product, Project } from "../types";
import type { Page } from "./route-config";
import { api } from "../api";
import { SkeletonRows } from "../components/loading";
import { money, stageMeta, statusPill } from "./stage-config";
import { Progress } from "../components/pipeline-stage";
import { IconKitSvg } from "../components/IconKitSvg";

export function Dashboard({ products, projects, productTotal, projectTotal, billing, userName, loading = false, navigate }: {
  products: Product[];
  projects: Project[];
  productTotal?: number; // 后端真实总数(分页 count),用于「N 个/SKU」展示
  projectTotal?: number;
  billing: BillingSummary | null;
  userName?: string;
  loading?: boolean;
  navigate: (page: Page) => void;
}) {
  const projCount = projectTotal ?? projects.length;
  const prodCount = productTotal ?? products.length;
  // 资产总数:走轻量 summary 接口(各 tab 计数之和),不再吃全局 assets 全量数组
  const [assetCount, setAssetCount] = useState<number | null>(null);
  useEffect(() => {
    let alive = true;
    api.assetSummary()
      .then((c) => { if (alive) setAssetCount(Object.values(c).reduce((a, b) => a + b, 0)); })
      .catch(() => {});
    return () => { alive = false; };
  }, []);
  const completed = projects.filter((project) => project.status === "completed").length;
  const running = projects.filter((project) => !["completed", "failed"].includes(project.status)).length;
  const productTitle = (id: string) => products.find((product) => product.id === id)?.title || "商品";

  // 日期 mono:`// 06.19 · 周四`(对齐 V1 mono 注释风,补零到两位)
  const now = new Date();
  const pad2 = (n: number) => String(n).padStart(2, "0");
  const weekdays = ["日", "一", "二", "三", "四", "五", "六"];
  const dateMono = `${pad2(now.getMonth() + 1)}.${pad2(now.getDate())} · 周${weekdays[now.getDay()]}`;

  // 「总项目」delta = 本月新建数(真实,按 created_at 算)。
  // 但 projects 仅首页分页数据;当存在未加载的项目(projCount > 已加载)时,本月数会少算 → 宁可不显示也不显假值。
  const monthStart = new Date(now.getFullYear(), now.getMonth(), 1).getTime();
  const newThisMonth = projects.filter((p) => p.created_at && new Date(p.created_at).getTime() >= monthStart).length;
  const allProjectsLoaded = projects.length >= projCount;
  const totalDelta = allProjectsLoaded && newThisMonth > 0 ? `↑ 本月 +${newThisMonth}` : undefined;

  // 余额 mini progress:真实冻结占比 = 冻结 /(可用 + 冻结);无 budget/已用字段,故不复刻 V1「已用 ¥X/¥Y」,改显真实「冻结 ¥X / 共 ¥Y」。
  const balanceNum = Number(billing?.account.balance ?? 0);
  const reservedNum = Number(billing?.account.reserved_balance ?? 0);
  const fundsTotal = balanceNum + reservedNum;
  const reservedPct = fundsTotal > 0 ? Math.min(100, Math.round((reservedNum / fundsTotal) * 100)) : 0;
  return (
    <>
      <div className="page-head">
        <div>
          <h1>欢迎回来{userName ? `，${userName.split("@")[0]}` : ""}</h1>
          <div className="sub"><span className="mono">// {dateMono}</span><span>·</span><span>你有 <b>{running} 个项目</b> 正在进行中</span></div>
        </div>
        <div className="actions">
          <button className="btn" type="button" onClick={() => navigate("products")}>
            <IconKitSvg name="productPlus" size={16} />
            新建商品
          </button>
          <button className="btn btn-primary btn-lg btn-create" type="button" onClick={() => navigate("projectWizard")}>
            <IconKitSvg name="clapperboard" size={16} />
            新建项目
          </button>
        </div>
      </div>
      <div className="stats with-corners"><span className="corner-tr">+</span><span className="corner-bl">+</span><KpiStat label="总项目" badge="ALL" value={projCount} delta={totalDelta} /><KpiStat label="进行中" badge="WIP" value={running} /><KpiStat label="成片" badge="DONE" value={completed} /><button className="stat" type="button" onClick={() => navigate("account")}><div className="lbl">余额 <span className="badge">¥</span></div><div className="v">{money(billing?.account.balance)}</div><div className="bar"><span style={{ width: `${reservedPct}%` }} /></div><div className="sub">冻结 {money(reservedNum)} / 共 {money(fundsTotal)}</div></button></div>
      <div className="dash-grid"><div><div className="section-h"><h2>最近项目</h2><button className="more" type="button" onClick={() => navigate("projects")}>[ ALL · {projCount} ] →</button></div><div className="card-hard">{loading && projects.length === 0 ? <SkeletonRows count={4} /> : projects.slice(0, 6).map((project) => <button className="recent-row" key={project.id} type="button" onClick={() => navigate("pipeline")}><div className="placeholder thumb"><span className="ph-frame">9:16</span></div><div className="recent-meta"><div className="name">{project.name}</div><div className="sub">{[productTitle(project.product), "AI 全生", project.video_segment_count ? `${project.video_segment_count} 镜` : null].filter(Boolean).join(" / ")}</div></div><Progress status={project.current_stage} /><span className={`pill ${statusPill(project.status)}`}><span className="dot" />{stageMeta[project.current_stage]?.label || project.current_stage}</span><span className="btn btn-sm">继续</span></button>)}</div></div><div style={{ display: "flex", flexDirection: "column", gap: 24 }}><div><div className="section-h"><h2>快捷入口</h2><span className="more">[ /shortcuts ]</span></div><div className="shortcuts"><Shortcut name="package" title="商品库" desc={`${prodCount} SKU`} onClick={() => navigate("products")} /><Shortcut name="images" title="资产库" desc={`${assetCount ?? "…"} 资产`} onClick={() => navigate("library")} /><Shortcut name="creditCard" title="充值" desc={money(billing?.account.balance)} onClick={() => navigate("account")} /><Shortcut name="clapperboard" title="所有项目" desc={`${projCount} 个`} onClick={() => navigate("projects")} /></div></div><div><div className="section-h"><h2>提示</h2><span className="more">[ FAQ ]</span></div><div className="tip"><strong>扣费规则</strong>生成失败、超时、用户重跑 — 均不扣费。仅在你点 <span className="mono">[ 确认通过 ]</span> 时按 token 实际结算。</div></div></div></div>
    </>
  );
}

export function KpiStat({ label, badge, value, delta }: { label: string; badge: string; value: string | number; delta?: string }) {
  return <div className="stat"><div className="lbl">{label} <span className="badge">{badge}</span></div><div className="v">{value}</div>{delta ? <div className="delta up">{delta}</div> : null}</div>;
}

export function Shortcut({ name, title, desc, onClick }: { name: string; title: string; desc: string; onClick: () => void }) {
  return <a className="shortcut" onClick={onClick}><div className="ic"><IconKitSvg name={name} size={16} /></div><div><div className="t">{title}</div><div className="d">{desc}</div></div></a>;
}