import { type PiProviderInfo, type PiThinkingLevel, type PiUpstream, PiUpstreamUpdate } from "@umt/contracts";
import { LoaderCircle, LogOut, Plus, Star, Trash2 } from "lucide-react";
import { useState } from "react";
import { toast } from "sonner";
import {
  useLogoutPiOAuth,
  usePiProviders,
  usePiUpstreamModels,
  usePiUpstreams,
  useRemovePiUpstream,
  useUpdatePiUpstream,
} from "~/api/pi.ts";
import { ConfirmDialog } from "~/components/console/confirm-dialog.tsx";
import { DataTable } from "~/components/console/data-table.tsx";
import { DetailSection, DetailSheet } from "~/components/console/detail-sheet.tsx";
import { FormField, zodFieldErrors } from "~/components/console/form-field.tsx";
import { StatusBadge } from "~/components/console/status-badge.tsx";
import { Button } from "~/components/ui/button.tsx";
import { errorMessage } from "~/lib/api.ts";
import { formatRelative } from "~/lib/labels.ts";
import { formatDateTime } from "~/lib/utils.ts";
import { PiOAuthLogin } from "./pi-oauth.tsx";
import {
  AUTH_LABEL,
  ModelInput,
  providerName,
  THINKING_LABEL,
  THINKING_OPTIONS,
  UpstreamStatusBadge,
} from "./pi-shared.tsx";
import { PiTestPanel } from "./pi-test.tsx";
import { PiUpstreamWizard } from "./pi-wizard.tsx";
import { FieldControl } from "./resource-section.tsx";
import { SettingsBlock } from "./settings-block.tsx";

// Agent 上游列表 + 编辑抽屉(登录、测试、设默认、删除)

export function PiUpstreamsBlock() {
  const list = usePiUpstreams();
  const providers = usePiProviders(false);
  const [wizard, setWizard] = useState(false);
  const [openId, setOpenId] = useState<string | null>(null);
  const open = list.data?.items.find((u) => u.id === openId) ?? null;
  const pv = providers.data?.providers;

  return (
    <SettingsBlock
      section="agent"
      anchor="upstream"
      title="上游"
      description="没指定上游的运行用默认上游。密钥和登录凭证保存后不回显。"
      plain
      actions={
        <Button size="sm" onClick={() => setWizard(true)}>
          <Plus />
          新建上游
        </Button>
      }
    >
      <DataTable
        rows={list.data?.items}
        rowKey={(r) => r.id}
        loading={list.isPending}
        error={list.error}
        onRetry={() => list.refetch()}
        onRowClick={(r) => setOpenId(r.id)}
        empty={{ title: "还没有上游" }}
        columns={[
          {
            key: "name",
            header: "名称",
            cell: (r) => (
              <div className="min-w-0">
                <p className="flex items-center gap-1.5 font-medium">
                  <span className="truncate">{r.name}</span>
                  {r.isDefault ? <StatusBadge tone="success">默认</StatusBadge> : null}
                </p>
                <p className="truncate text-meta text-muted-foreground">{providerName(pv, r.provider)}</p>
              </div>
            ),
          },
          { key: "auth", header: "认证", hideBelow: "md", cell: (r) => AUTH_LABEL[r.authKind] },
          {
            key: "model",
            header: "模型",
            hideBelow: "sm",
            cell: (r) => <code className="text-meta break-all">{r.defaultModel ?? "provider 默认"}</code>,
          },
          { key: "status", header: "状态", cell: (r) => <UpstreamStatusBadge u={r} /> },
        ]}
      />
      <UpstreamDrawer
        key={open?.id ?? "none"}
        upstream={open}
        provider={pv?.find((p) => p.id === open?.provider)}
        onClose={() => setOpenId(null)}
      />
      <PiUpstreamWizard open={wizard} onClose={() => setWizard(false)} />
    </SettingsBlock>
  );
}

function UpstreamDrawer({
  upstream,
  provider,
  onClose,
}: {
  upstream: PiUpstream | null;
  provider: PiProviderInfo | undefined;
  onClose: () => void;
}) {
  const update = useUpdatePiUpstream();
  const remove = useRemovePiUpstream();
  const logout = useLogoutPiOAuth();
  const models = usePiUpstreamModels(upstream?.id ?? null);
  const [deleting, setDeleting] = useState(false);
  const [v, setV] = useState(() => ({
    name: upstream?.name ?? "",
    model: upstream?.defaultModel ?? "",
    thinking: (upstream?.thinkingLevel ?? "medium") as PiThinkingLevel,
    baseUrl: upstream?.baseUrl ?? "",
    apiKey: "",
    enabled: upstream?.enabled ?? true,
    env: { ...(upstream?.extra.env ?? {}) } as Record<string, string>,
  }));
  const [errors, setErrors] = useState<Record<string, string>>({});
  if (!upstream) return null;

  const custom = upstream.provider === "openai-compatible";
  const showBaseUrl = (provider?.baseUrlOverridable ?? custom) && upstream.authKind !== "oauth";
  const showThinking = provider?.supportsThinking || custom;
  const envFields = provider?.envFields ?? [];
  const dirty =
    v.name !== upstream.name ||
    v.model !== (upstream.defaultModel ?? "") ||
    v.thinking !== upstream.thinkingLevel ||
    v.baseUrl !== (upstream.baseUrl ?? "") ||
    !!v.apiKey ||
    v.enabled !== upstream.enabled ||
    envFields.some((f) => (v.env[f.name] ?? "") !== (upstream.extra.env?.[f.name] ?? ""));

  const save = async (e: React.FormEvent) => {
    e.preventDefault();
    const env = Object.fromEntries(Object.entries(v.env).filter(([, x]) => x.trim()));
    const parsed = PiUpstreamUpdate.safeParse({
      name: v.name.trim(),
      defaultModel: v.model.trim() || null,
      ...(showThinking ? { thinkingLevel: v.thinking } : {}),
      ...(showBaseUrl ? { baseUrl: v.baseUrl.trim() || null } : {}),
      ...(v.apiKey.trim() ? { apiKey: v.apiKey.trim() } : {}),
      enabled: v.enabled,
      ...(envFields.length ? { extra: { ...upstream.extra, env } } : {}),
    });
    if (!parsed.success) {
      setErrors(zodFieldErrors(parsed.error.issues));
      return;
    }
    setErrors({});
    try {
      await update.mutateAsync({ id: upstream.id, body: parsed.data });
      setV((s) => ({ ...s, apiKey: "" }));
      toast.success(`${v.name.trim()}已保存`);
    } catch (err) {
      toast.error(errorMessage(err, "保存失败"));
    }
  };

  const makeDefault = async () => {
    try {
      await update.mutateAsync({ id: upstream.id, body: { makeDefault: true } });
      toast.success(`${upstream.name}已设为默认上游`);
    } catch (err) {
      toast.error(errorMessage(err, "设置失败"));
    }
  };

  const pending = update.isPending;
  return (
    <DetailSheet
      open
      onOpenChange={(o) => !o && onClose()}
      title={upstream.name}
      description={
        <span className="flex flex-wrap items-center gap-2">
          <UpstreamStatusBadge u={upstream} />
          {upstream.isDefault ? <StatusBadge tone="success">默认上游</StatusBadge> : null}
          <span>
            {provider?.name ?? upstream.provider} · {AUTH_LABEL[upstream.authKind]}
          </span>
        </span>
      }
      width="lg"
      footer={
        <>
          <Button
            variant="ghost"
            className="mr-auto hover:text-destructive"
            onClick={() => setDeleting(true)}
            disabled={pending}
          >
            <Trash2 />
            删除
          </Button>
          {upstream.isDefault ? null : (
            <Button variant="outline" onClick={makeDefault} disabled={pending}>
              <Star />
              设为默认
            </Button>
          )}
          <Button type="submit" form="pi-upstream-form" disabled={pending || !dirty}>
            {pending ? <LoaderCircle className="animate-spin" /> : null}
            保存
          </Button>
        </>
      }
    >
      <dl className="grid grid-cols-[auto_1fr] gap-x-4 gap-y-1 text-caption">
        {upstream.credentialMask ? (
          <>
            <dt className="text-muted-foreground">API Key</dt>
            <dd className="font-mono">{upstream.credentialMask}</dd>
          </>
        ) : null}
        {upstream.account ? (
          <>
            <dt className="text-muted-foreground">账号</dt>
            <dd className="break-all">{upstream.account}</dd>
          </>
        ) : null}
        {upstream.oauthExpiresAt ? (
          <>
            <dt className="text-muted-foreground">令牌到期</dt>
            <dd>{formatDateTime(upstream.oauthExpiresAt)}(到期前自动刷新)</dd>
          </>
        ) : null}
        <dt className="text-muted-foreground">最近验证</dt>
        <dd>{upstream.lastVerifiedAt ? formatRelative(upstream.lastVerifiedAt) : "未验证"}</dd>
        {upstream.lastError ? (
          <>
            <dt className="text-muted-foreground">最近错误</dt>
            <dd className="break-words text-destructive">{upstream.lastError}</dd>
          </>
        ) : null}
      </dl>

      {upstream.authKind === "oauth" ? (
        <DetailSection
          title="登录"
          actions={
            upstream.hasCredential ? (
              <Button
                variant="ghost"
                size="xs"
                disabled={logout.isPending}
                onClick={async () => {
                  try {
                    await logout.mutateAsync(upstream.id);
                    toast.success("已退出登录");
                  } catch (err) {
                    toast.error(errorMessage(err, "退出失败"));
                  }
                }}
              >
                <LogOut />
                退出登录
              </Button>
            ) : null
          }
        >
          {upstream.hasCredential && upstream.status === "ok" ? (
            <p className="text-caption text-muted-foreground">已登录。退出只删除本地令牌,不会撤销提供方侧的授权。</p>
          ) : (
            <PiOAuthLogin upstream={upstream} provider={provider} />
          )}
        </DetailSection>
      ) : null}

      <DetailSection title="配置">
        <form id="pi-upstream-form" onSubmit={save} noValidate className="grid gap-x-4 gap-y-1 sm:grid-cols-2">
          <FieldControl
            spec={{ name: "name", label: "名称", kind: "text", required: true }}
            value={v.name}
            error={errors.name}
            onChange={(x) => setV((s) => ({ ...s, name: String(x) }))}
            disabled={pending}
          />
          <FieldControl
            spec={{ name: "enabled", label: "启用", kind: "switch", hint: "停用后,使用它的运行会失败" }}
            value={v.enabled}
            onChange={(x) => setV((s) => ({ ...s, enabled: x === true }))}
            disabled={pending}
          />
          <FormField
            label="默认模型"
            htmlFor="pu-model"
            error={errors.defaultModel}
            hint={models.data?.refreshError ? `模型列表刷新失败:${models.data.refreshError}` : "可从列表选,也可手填"}
            className="sm:col-span-2"
          >
            <ModelInput
              id="pu-model"
              value={v.model}
              onChange={(x) => setV((s) => ({ ...s, model: x }))}
              models={models.data?.items ?? []}
              disabled={pending}
            />
          </FormField>
          {showThinking ? (
            <FieldControl
              spec={{
                name: "thinking",
                label: "思考档位",
                kind: "select",
                options: THINKING_OPTIONS,
                hint: `当前 ${THINKING_LABEL[upstream.thinkingLevel]};运行时按模型支持的档位取近`,
              }}
              value={v.thinking}
              onChange={(x) => setV((s) => ({ ...s, thinking: x as PiThinkingLevel }))}
              disabled={pending}
            />
          ) : null}
          {showBaseUrl ? (
            <FieldControl
              spec={{
                name: "baseUrl",
                label: "Base URL",
                kind: "url",
                wide: true,
                placeholder: provider?.defaultBaseUrl ?? undefined,
                hint: custom ? undefined : "留空用官方地址",
              }}
              value={v.baseUrl}
              error={errors.baseUrl}
              onChange={(x) => setV((s) => ({ ...s, baseUrl: String(x) }))}
              disabled={pending}
            />
          ) : null}
          {upstream.authKind === "api_key" ? (
            <FieldControl
              spec={{
                name: "apiKey",
                label: upstream.hasCredential ? "替换 API Key" : "API Key",
                kind: "password",
                wide: true,
                hint: upstream.hasCredential ? "留空不修改" : undefined,
              }}
              value={v.apiKey}
              error={errors.apiKey}
              onChange={(x) => setV((s) => ({ ...s, apiKey: String(x) }))}
              disabled={pending}
            />
          ) : null}
          {envFields.map((f) => (
            <FieldControl
              key={f.name}
              spec={{ name: `env-${f.name}`, label: f.label, kind: "text", hint: f.hint ?? f.name }}
              value={v.env[f.name] ?? ""}
              onChange={(x) => setV((s) => ({ ...s, env: { ...s.env, [f.name]: String(x) } }))}
              disabled={pending}
            />
          ))}
        </form>
      </DetailSection>

      <DetailSection title="测试">
        <PiTestPanel upstream={upstream} model={v.model.trim() || null} />
      </DetailSection>

      <ConfirmDialog
        open={deleting}
        onOpenChange={setDeleting}
        title={`删除上游「${upstream.name}」?`}
        description={
          upstream.isDefault ? "它是默认上游,删除后没有默认上游;凭证一并删除,无法恢复。" : "凭证一并删除,无法恢复。"
        }
        confirmLabel="删除上游"
        destructive
        onConfirm={async () => {
          try {
            await remove.mutateAsync(upstream.id);
            toast.success(`${upstream.name}已删除`);
            onClose();
          } catch (err) {
            toast.error(errorMessage(err, "删除失败"));
            throw err;
          }
        }}
      />
    </DetailSheet>
  );
}