"use client";

import Link from "next/link";
import { Coins, Flame, Gift, TrendingUp } from "lucide-react";
import type { EconomyStats } from "@/lib/api";
import { postTypeLabel } from "@/lib/postMeta";
import { pointReasonLabel } from "@/lib/points";
import { formatRelative } from "@/lib/format";
import { AdminPageHeader, AdminStatCard } from "@/components/admin";
import {
  AdminChartCard,
  DeltaBarChart,
  NamedBarChart,
  NamedPieChart,
  SingleAreaChart,
} from "@/components/admin/charts";

const fmt = (n: number) => n.toLocaleString("zh-CN");

function netDeltaLabel(n: number) {
  if (n > 0) return `+${fmt(n)}`;
  return fmt(n);
}

export default function EconomyClient({ stats }: { stats: EconomyStats }) {
  const checkinSeries = (stats.checkin_series || []).map((d) => ({
    date: d.date,
    count: d.count,
  }));

  const ledgerByReason = (stats.ledger_by_reason || []).map((r) => ({
    label: pointReasonLabel(r.key || r.label),
    count: r.count,
  }));

  const deltaSeries = stats.delta_series || [];

  const postsByType = Object.entries(stats.posts_by_type || {})
    .map(([t, n]) => ({ label: postTypeLabel(t), count: Number(n) || 0 }))
    .filter((d) => d.count > 0)
    .sort((a, b) => b.count - a.count);

  const net = stats.net_delta_7d ?? 0;

  return (
    <div>
      <AdminPageHeader
        icon={Coins}
        title="积分与类型帖看板"
        description="观察全站积分流通、悬赏托管与帖子类型分布"
      />

      <div className="grid grid-cols-1 sm:grid-cols-2 xl:grid-cols-4 gap-3 mb-5">
        <AdminStatCard
          label="用户余额合计"
          value={fmt(stats.total_balance)}
          hint="全站可用积分之和"
          icon={<Coins size={16} />}
        />
        <AdminStatCard
          label="今日签到"
          value={fmt(stats.checkin_today)}
          hint="今日已签到人数"
          icon={<Flame size={16} />}
          color="var(--clay)"
          soft="var(--clay-soft)"
        />
        <AdminStatCard
          label="托管中悬赏"
          value={`${fmt(stats.open_bounties)} / ${fmt(stats.escrowed_points)}`}
          hint="未结算帖数 / 托管积分"
          icon={<Gift size={16} />}
          color="var(--gold)"
          soft="var(--gold-soft)"
        />
        <AdminStatCard
          label="近 7 日净变动"
          value={netDeltaLabel(net)}
          hint="发放减去消耗"
          icon={<TrendingUp size={16} />}
          color={net >= 0 ? "var(--ok)" : "var(--danger)"}
          soft={net >= 0 ? "var(--ok-soft)" : "var(--danger-soft)"}
        />
      </div>

      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4 mb-4">
        <AdminChartCard title="签到趋势" hint="近 14 日每日签到人数">
          {checkinSeries.length === 0 ? (
            <p className="meta text-center py-16">暂无签到数据</p>
          ) : (
            <SingleAreaChart
              data={checkinSeries}
              dataKey="count"
              name="签到"
              color="var(--clay)"
            />
          )}
        </AdminChartCard>

        <AdminChartCard title="流水原因分布" hint="按入账原因聚合条数">
          {ledgerByReason.length === 0 ? (
            <p className="meta text-center py-16">暂无流水</p>
          ) : (
            <NamedBarChart data={ledgerByReason} layout="horizontal" />
          )}
        </AdminChartCard>

        <AdminChartCard title="发放 / 消耗" hint="近 14 日积分进出">
          {deltaSeries.length === 0 ? (
            <p className="meta text-center py-16">暂无数据</p>
          ) : (
            <DeltaBarChart data={deltaSeries} />
          )}
        </AdminChartCard>

        <AdminChartCard title="帖子类型分布" hint="全站帖子按类型占比">
          {postsByType.length === 0 ? (
            <p className="meta text-center py-16">暂无数据</p>
          ) : (
            <NamedPieChart data={postsByType} />
          )}
        </AdminChartCard>
      </div>

      <section className="panel overflow-hidden">
        <div
          className="px-5 py-3.5 font-medium text-[15px]"
          style={{ borderBottom: "1px solid var(--line)", color: "var(--ink)" }}
        >
          最近流水
        </div>
        {(stats.recent_ledger || []).length === 0 ? (
          <p className="meta text-center py-10">暂无流水</p>
        ) : (
          <ul>
            {stats.recent_ledger.map((it, idx) => (
              <li
                key={it.id}
                className="px-5 py-3 flex items-start justify-between gap-3"
                style={idx === 0 ? undefined : { borderTop: "1px solid var(--line)" }}
              >
                <div className="min-w-0">
                  <p className="text-[13.5px] truncate" style={{ color: "var(--ink)" }}>
                    {pointReasonLabel(it.reason)}
                    {it.note ? ` · ${it.note}` : ""}
                  </p>
                  <p className="meta text-[12px] mt-0.5">{formatRelative(it.created_at)}</p>
                </div>
                <span
                  className="tabular-nums font-medium shrink-0"
                  style={{ color: it.delta >= 0 ? "var(--accent)" : "var(--danger)" }}
                >
                  {it.delta >= 0 ? `+${it.delta}` : it.delta}
                </span>
              </li>
            ))}
          </ul>
        )}
      </section>

      <p className="meta text-[12.5px] mt-5">
        用户可在{" "}
        <Link href="/points" className="hover:text-[var(--accent)]">
          /points
        </Link>{" "}
        查看个人流水。
      </p>
    </div>
  );
}