"use client";

import { useCallback, useEffect, useState } from "react";
import { AdminLayout } from "@/components/layout/admin-layout";
import { PageHeader } from "@/components/layout/page-header";
import { Skeleton } from "@/components/ui/skeleton";
import { ErrorBanner } from "@/components/ui/error-banner";
import { SecondaryButton } from "@/components/ui/primary-button";
import { SelectField } from "@/components/ui/select-field";
import { Card } from "@/components/ui/card";
import { formatDateTime } from "@/lib/frontend/format";
import { adminGetQueryLogs } from "@/lib/frontend/api-client";
import { useAuth } from "@/hooks/use-auth";
import {
  buildQueryLogCargoCopy,
  buildQueryLogDeliveryCopy,
  buildQueryLogFullCopy,
  buildQueryLogPickupCopy,
  buildQueryLogQuotesCopy,
  formatQueryLogQuoteLine,
  preferredAdminAddress,
} from "@/lib/frontend/query-log-copy";
import type {
  DataPageStatus,
  QuoteQueryLogQuotePreview,
  QuoteQueryLogRecord,
  QuoteQueryOutcome,
} from "@/lib/frontend/types";

const PAGE_SIZE = 20;

const OUTCOME_OPTIONS = [
  { value: "", label: "全部结果" },
  { value: "success", label: "成功" },
  { value: "failed", label: "失败" },
  { value: "stale", label: "降级缓存" },
  { value: "processing", label: "进行中" },
];

const OUTCOME_LABEL: Record<QuoteQueryOutcome, string> = {
  success: "成功",
  failed: "失败",
  stale: "降级缓存",
  processing: "进行中",
};

function outcomeBadgeClass(outcome: QuoteQueryOutcome): string {
  if (outcome === "success") return "bg-emerald-50 text-success";
  if (outcome === "failed") return "bg-red-50 text-error";
  if (outcome === "stale") return "bg-amber-50 text-warning";
  return "bg-slate-100 text-text-secondary";
}

function formatQuotedTotal(value: number | null | undefined): string {
  if (typeof value !== "number" || !Number.isFinite(value)) {
    return "—";
  }
  return `USD ${value.toFixed(2)}`;
}

function quotesOf(row: QuoteQueryLogRecord): QuoteQueryLogQuotePreview[] {
  return Array.isArray(row.quotes) ? row.quotes : [];
}

function formatQuotedSummary(row: QuoteQueryLogRecord): {
  primary: string;
  secondary: string | null;
} {
  const quotes = quotesOf(row);
  if (quotes.length > 1) {
    return {
      primary: `${quotes.length} 档`,
      secondary: `最低 ${formatQuotedTotal(row.quoted_total)}`,
    };
  }
  if (quotes.length === 1) {
    return {
      primary: formatQuotedTotal(quotes[0]?.final_total ?? row.quoted_total),
      secondary: quotes[0]?.carrier?.trim() || null,
    };
  }
  return { primary: formatQuotedTotal(row.quoted_total), secondary: null };
}

function displayOrDash(value: string | null | undefined): string {
  const t = (value ?? "").trim();
  return t || "—";
}

async function copyText(value: string): Promise<boolean> {
  const text = value.trim();
  if (!text) return false;
  try {
    await navigator.clipboard.writeText(text);
    return true;
  } catch {
    return false;
  }
}

function CopyButton({
  text,
  label = "复制",
}: {
  text: string;
  label?: string;
}) {
  const [copied, setCopied] = useState(false);
  const disabled = !text.trim();
  return (
    <button
      type="button"
      disabled={disabled}
      onClick={() => {
        void copyText(text).then((ok) => {
          if (!ok) return;
          setCopied(true);
          window.setTimeout(() => setCopied(false), 1600);
        });
      }}
      className="inline-flex h-8 shrink-0 items-center rounded-md border border-border bg-surface px-2.5 text-xs font-medium text-text-primary hover:bg-bg disabled:cursor-not-allowed disabled:opacity-40"
    >
      {copied ? "已复制" : label}
    </button>
  );
}

function DetailField({
  label,
  value,
  copyTextValue,
  copyLabel,
  mono,
}: {
  label: string;
  value: string;
  copyTextValue?: string;
  copyLabel?: string;
  mono?: boolean;
}) {
  return (
    <div className="border-b border-border py-3">
      <div className="flex items-start justify-between gap-3">
        <dt className="text-xs text-text-secondary">{label}</dt>
        {copyTextValue ? (
          <CopyButton text={copyTextValue} label={copyLabel ?? "复制"} />
        ) : null}
      </div>
      <dd
        className={`mt-1 break-words text-sm leading-relaxed text-text-primary ${
          mono ? "font-mono text-xs" : ""
        }`}
      >
        {value}
      </dd>
    </div>
  );
}

export default function QueryLogsPage() {
  const { token } = useAuth();
  const [status, setStatus] = useState<DataPageStatus>("loading");
  const [rows, setRows] = useState<QuoteQueryLogRecord[]>([]);
  const [total, setTotal] = useState(0);
  const [page, setPage] = useState(1);
  const [outcomeFilter, setOutcomeFilter] = useState("");
  const [detail, setDetail] = useState<QuoteQueryLogRecord | null>(null);

  const load = useCallback(
    async (p: number, outcome: string) => {
      if (!token) return;
      setStatus("loading");
      const res = await adminGetQueryLogs(
        "",
        token,
        p,
        PAGE_SIZE,
        undefined,
        undefined,
        outcome || undefined,
      );
      if (res.code !== 0) {
        setStatus("error");
        return;
      }
      setRows(res.data.list);
      setTotal(res.data.total);
      setStatus(res.data.total === 0 ? "empty" : "success");
    },
    [token],
  );

  useEffect(() => {
    void load(page, outcomeFilter);
  }, [load, page, outcomeFilter]);

  const totalPages = Math.max(1, Math.ceil(total / PAGE_SIZE));

  return (
    <AdminLayout>
      <PageHeader
        title="查价记录"
        subtitle="最近 1000 条询价流水。列表只看结果，完整地址与货物参数在详情中复制。"
        action={
          <div className="w-36">
            <SelectField
              label=""
              aria-label="查询结果"
              name="outcome"
              value={outcomeFilter}
              options={OUTCOME_OPTIONS}
              onChange={(e) => {
                setPage(1);
                setOutcomeFilter(e.target.value);
              }}
            />
          </div>
        }
      />

      {status === "loading" && (
        <div className="space-y-2">
          {Array.from({ length: 6 }).map((_, i) => (
            <Skeleton key={i} className="h-16 w-full" />
          ))}
        </div>
      )}
      {status === "error" && (
        <ErrorBanner
          action={
            <SecondaryButton onClick={() => void load(page, outcomeFilter)}>
              重试
            </SecondaryButton>
          }
        >
          加载查价记录失败
        </ErrorBanner>
      )}
      {status === "empty" && (
        <Card>
          <p className="text-sm text-text-secondary">暂无查价记录</p>
        </Card>
      )}

      {status === "success" && (
        <div className="space-y-4">
          <div className="overflow-hidden rounded-lg border border-border bg-surface">
            <table className="w-full table-fixed text-sm">
              <colgroup>
                <col className="w-[10.5rem]" />
                <col className="w-[7.5rem]" />
                <col />
                <col className="w-[5.75rem]" />
                <col className="w-[7.25rem]" />
                <col className="w-[4.75rem]" />
              </colgroup>
              <thead className="border-b border-border bg-bg text-left text-text-secondary">
                <tr>
                  <th className="px-4 py-3 font-medium">查询时间</th>
                  <th className="px-4 py-3 font-medium">客户</th>
                  <th className="px-4 py-3 font-medium">线路</th>
                  <th className="px-4 py-3 font-medium">结果</th>
                  <th className="px-4 py-3 font-medium">报价</th>
                  <th className="px-4 py-3 font-medium">操作</th>
                </tr>
              </thead>
              <tbody>
                {rows.map((row) => {
                  const pickup = preferredAdminAddress(
                    row.pickup_selected,
                    row.pickup_customer,
                  );
                  const delivery = preferredAdminAddress(
                    row.delivery_selected,
                    row.delivery_customer,
                  );
                  return (
                    <tr
                      key={row.quote_id}
                      className="border-b border-border last:border-b-0"
                    >
                      <td className="px-4 py-3 align-middle text-text-secondary">
                        {formatDateTime(row.created_at)}
                      </td>
                      <td className="px-4 py-3 align-middle font-mono text-xs">
                        <span className="block truncate" title={row.customer_id}>
                          {row.customer_id}
                        </span>
                      </td>
                      <td className="px-4 py-3 align-middle">
                        <p
                          className="truncate text-text-primary"
                          title={pickup || "—"}
                        >
                          提 {pickup || "—"}
                        </p>
                        <p
                          className="mt-0.5 truncate text-text-secondary"
                          title={delivery || "—"}
                        >
                          送 {delivery || "—"}
                        </p>
                      </td>
                      <td className="px-4 py-3 align-middle">
                        <span
                          className={`inline-flex rounded-full px-2 py-0.5 text-xs font-medium ${outcomeBadgeClass(row.outcome)}`}
                        >
                          {OUTCOME_LABEL[row.outcome]}
                        </span>
                      </td>
                      <td className="px-4 py-3 align-middle text-text-primary">
                        {(() => {
                          const summary = formatQuotedSummary(row);
                          return (
                            <>
                              <p>{summary.primary}</p>
                              {summary.secondary ? (
                                <p className="mt-0.5 truncate text-xs text-text-secondary">
                                  {summary.secondary}
                                </p>
                              ) : null}
                            </>
                          );
                        })()}
                      </td>
                      <td className="px-4 py-3 align-middle">
                        <button
                          type="button"
                          onClick={() => setDetail(row)}
                          className="text-sm font-medium text-primary hover:underline"
                        >
                          详情
                        </button>
                      </td>
                    </tr>
                  );
                })}
              </tbody>
            </table>
          </div>
          <div className="flex items-center justify-between text-sm">
            <span className="text-text-secondary">
              共 {total} 条（系统最多保留 1000 条）
            </span>
            <div className="flex gap-2">
              <SecondaryButton
                disabled={page <= 1}
                onClick={() => setPage((p) => p - 1)}
              >
                上一页
              </SecondaryButton>
              <span className="px-2 py-2 text-text-secondary">
                {page} / {totalPages}
              </span>
              <SecondaryButton
                disabled={page >= totalPages}
                onClick={() => setPage((p) => p + 1)}
              >
                下一页
              </SecondaryButton>
            </div>
          </div>
        </div>
      )}

      {detail && (
        <div
          className="fixed inset-0 z-50 flex justify-end bg-black/30"
          onClick={() => setDetail(null)}
        >
          <div
            className="flex h-full w-full max-w-lg flex-col bg-surface shadow-modal"
            onClick={(e) => e.stopPropagation()}
            role="dialog"
            aria-modal
            aria-labelledby="query-log-detail-title"
          >
            <div className="flex items-start justify-between gap-3 border-b border-border px-6 py-4">
              <div>
                <h3
                  id="query-log-detail-title"
                  className="text-lg font-semibold text-text-primary"
                >
                  询价详情
                </h3>
                <p className="mt-1 text-xs text-text-secondary">
                  可复制完整地址与货物参数
                </p>
              </div>
              <CopyButton text={buildQueryLogFullCopy(detail)} label="复制全部" />
            </div>
            <div className="flex-1 overflow-y-auto px-6 py-4">
              <dl>
                <DetailField
                  label="报价单号"
                  value={detail.quote_id}
                  copyTextValue={detail.quote_id}
                  mono
                />
                <DetailField
                  label="客户"
                  value={detail.customer_id}
                  copyTextValue={detail.customer_id}
                  mono
                />
                <DetailField
                  label="查询时间"
                  value={formatDateTime(detail.created_at)}
                />
                <DetailField
                  label="完成时间"
                  value={
                    detail.completed_at
                      ? formatDateTime(detail.completed_at)
                      : "—"
                  }
                />
                <DetailField
                  label="结果"
                  value={
                    detail.failure_reason && detail.outcome !== "success"
                      ? `${OUTCOME_LABEL[detail.outcome]}：${detail.failure_reason}`
                      : OUTCOME_LABEL[detail.outcome]
                  }
                />
                <DetailField
                  label="提货地址"
                  value={displayOrDash(
                    preferredAdminAddress(
                      detail.pickup_selected,
                      detail.pickup_customer,
                    ),
                  )}
                  copyTextValue={buildQueryLogPickupCopy(detail)}
                  copyLabel="复制地址"
                />
                <DetailField
                  label="派送地址"
                  value={displayOrDash(
                    preferredAdminAddress(
                      detail.delivery_selected,
                      detail.delivery_customer,
                    ),
                  )}
                  copyTextValue={buildQueryLogDeliveryCopy(detail)}
                  copyLabel="复制地址"
                />
                <DetailField
                  label="货物参数"
                  value={displayOrDash(detail.cargo_summary)}
                  copyTextValue={buildQueryLogCargoCopy(detail)}
                  copyLabel="复制参数"
                />
                <div className="border-b border-border py-3">
                  <div className="flex items-start justify-between gap-3">
                    <dt className="text-xs text-text-secondary">
                      报价列表
                      {quotesOf(detail).length > 0
                        ? `（${quotesOf(detail).length} 档）`
                        : ""}
                    </dt>
                    {quotesOf(detail).length > 0 ? (
                      <CopyButton
                        text={buildQueryLogQuotesCopy(quotesOf(detail))}
                        label="复制报价"
                      />
                    ) : null}
                  </div>
                  <dd className="mt-2 space-y-1.5">
                    {quotesOf(detail).length === 0 ? (
                      <p className="text-sm text-text-secondary">
                        {detail.quoted_total != null
                          ? `${displayOrDash(detail.quoted_carrier)} · ${formatQuotedTotal(detail.quoted_total)}`
                          : "—"}
                      </p>
                    ) : (
                      quotesOf(detail).map((q, i) => (
                        <p
                          key={`${q.carrier}-${q.service_level}-${q.rate_option}-${i}`}
                          className="text-sm leading-relaxed text-text-primary"
                        >
                          {formatQueryLogQuoteLine(q)}
                        </p>
                      ))
                    )}
                  </dd>
                </div>
              </dl>
            </div>
            <div className="border-t border-border px-6 py-4">
              <SecondaryButton onClick={() => setDetail(null)}>
                关闭
              </SecondaryButton>
            </div>
          </div>
        </div>
      )}
    </AdminLayout>
  );
}