"use client";

import { useEffect, useMemo, useState } from "react";
import useSWR from "swr";
import { toast } from "sonner";
import { KeyRound, Plus, Save, Trash2 } from "lucide-react";
import {
  LocalAiSectionShell,
  LocalAiSectionSummary,
} from "@/app/(admin)/settings/_components/local-ai-section-shell";
import { formatBeijingTime } from "@/lib/utils";
import {
  defaultExternalImageApiConfig,
  EXTERNAL_IMAGE_API_CONFIG_KEY,
  maskExternalImageApiKey,
  normalizeExternalImageApiConfig,
  type ExternalImageApiConfig,
} from "@/lib/external-image-api/config";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Switch } from "@/components/ui/switch";
import { Textarea } from "@/components/ui/textarea";

const fetcher = async (url: string) => {
  const response = await fetch(url);
  if (!response.ok) {
    const payload = await response.json().catch(() => ({}));
    throw new Error(payload?.error || payload?.message || "请求失败");
  }
  return response.json();
};

type AdminExternalImageApiLog = {
  id: string;
  apiKeyId: string | null;
  apiKeyName: string | null;
  ownerUserEmail: string | null;
  modelDisplayName: string | null;
  modelRuntimeId: string | null;
  prompt: string | null;
  negativePrompt: string | null;
  imageCount: number;
  aspectRatio: string | null;
  imageSize: string | null;
  status: string;
  generatedImageUrls: string[] | null;
  errorMessage: string | null;
  durationMs: number | null;
  requesterIp: string | null;
  createdAt: string;
  completedAt: string | null;
};

function buildKeyDraft() {
  return {
    id: `external-key-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`,
    name: "",
    apiKey: "",
    enabled: true,
    notes: "",
  };
}

export function ExternalImageApiSettingsCard({
  expanded,
  onToggle,
  sectionId = "local-ai-section-external-image-api",
}: {
  expanded: boolean;
  onToggle: () => void;
  sectionId?: string;
}) {
  const { data: configData, mutate: mutateConfig } = useSWR<{
    setting?: { value?: unknown };
  }>(`/api/admin/settings?key=${EXTERNAL_IMAGE_API_CONFIG_KEY}`, fetcher);
  const { data: logsData, mutate: mutateLogs } = useSWR<{
    success: boolean;
    data: { logs: AdminExternalImageApiLog[] };
  }>("/api/admin/external-image-api/logs?limit=50", fetcher);

  const [config, setConfig] = useState<ExternalImageApiConfig>(
    defaultExternalImageApiConfig,
  );
  const [isSaving, setIsSaving] = useState(false);

  useEffect(() => {
    setConfig(
      normalizeExternalImageApiConfig(configData?.setting?.value),
    );
  }, [configData]);

  const enabledKeyCount = useMemo(
    () => config.apiKeys.filter((item) => item.enabled).length,
    [config.apiKeys],
  );

  const handleAddKey = () => {
    setConfig((current) => ({
      ...current,
      apiKeys: [...current.apiKeys, buildKeyDraft()],
    }));
  };

  const handleRemoveKey = (id: string) => {
    setConfig((current) => ({
      ...current,
      apiKeys: current.apiKeys.filter((item) => item.id !== id),
    }));
  };

  const handleSave = async () => {
    setIsSaving(true);
    try {
      const response = await fetch("/api/admin/settings", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          key: EXTERNAL_IMAGE_API_CONFIG_KEY,
          value: normalizeExternalImageApiConfig(config),
        }),
      });

      const payload = await response.json().catch(() => ({}));
      if (!response.ok) {
        throw new Error(
          String(payload?.message || payload?.error || "保存失败"),
        );
      }

      toast.success("第三方生图 API 配置已保存");
      await Promise.all([mutateConfig(), mutateLogs()]);
    } catch (error) {
      console.error("[External Image API Settings] Save failed:", error);
      toast.error(error instanceof Error ? error.message : "保存失败");
    } finally {
      setIsSaving(false);
    }
  };

  return (
    <LocalAiSectionShell
      description={
        <>
          对外开放当前系统里已启用的生图模型。第三方先调
          <code className="mx-1 rounded bg-muted px-1 py-0.5 text-[11px]">
            /api/external/image/models
          </code>
          获取模型名称，再调用
          <code className="mx-1 rounded bg-muted px-1 py-0.5 text-[11px]">
            /api/external/image/generate
          </code>
          生图。结果会继续走我们的储存桶并落到数据库。
        </>
      }
      expanded={expanded}
      id={sectionId}
      onToggle={onToggle}
      summary={
        <LocalAiSectionSummary
          items={[
            {
              label: config.enabled ? "开放接口已启用" : "开放接口已关闭",
              tone: config.enabled ? "enabled" : "disabled",
            },
            {
              label: `已配置 ${config.apiKeys.length} 个 Key`,
              tone: config.apiKeys.length > 0 ? "enabled" : "warning",
            },
            {
              label: `启用中 ${enabledKeyCount} 个`,
              tone: enabledKeyCount > 0 ? "enabled" : "neutral",
            },
          ]}
        />
      }
      title={
        <span className="flex items-center gap-2">
          <KeyRound className="h-5 w-5" />
          第三方生图 API
        </span>
      }
    >
      <div className="space-y-6">
        <div className="grid gap-4 lg:grid-cols-[1.2fr_1fr]">
          <div className="space-y-4 rounded-xl border p-4">
            <div className="flex items-center justify-between rounded-lg border p-3">
              <div className="space-y-0.5">
                <Label className="text-sm">启用第三方生图 API</Label>
                <div className="text-xs text-muted-foreground">
                  关闭后第三方 API Key 会全部失效。
                </div>
              </div>
              <div className="flex items-center gap-2">
                <Switch
                  checked={config.enabled}
                  onCheckedChange={(checked) =>
                    setConfig((current) => ({ ...current, enabled: checked }))
                  }
                />
                <span className="min-w-[3rem] text-sm font-medium text-muted-foreground">
                  {config.enabled ? "已开启" : "已关闭"}
                </span>
              </div>
            </div>

            <div className="space-y-2">
              <Label htmlFor="externalImageApiOwnerEmail">
                生成结果归属邮箱
              </Label>
              <Input
                id="externalImageApiOwnerEmail"
                value={config.defaultOwnerEmail}
                onChange={(event) =>
                  setConfig((current) => ({
                    ...current,
                    defaultOwnerEmail: event.target.value,
                  }))
                }
                placeholder="external-image-api@system.local"
              />
              <div className="text-xs text-muted-foreground">
                外部 API 生成图片会统一挂到这个用户下，方便我们保留生成记录、媒体资产和后续分析数据。
              </div>
            </div>

            <div className="rounded-xl border border-dashed p-4 text-sm text-muted-foreground">
              当前共 {config.apiKeys.length} 个 Key，启用中 {enabledKeyCount} 个。
              外部调用支持
              <code className="mx-1 rounded bg-muted px-1 py-0.5 text-[11px]">
                Authorization: Bearer &lt;apiKey&gt;
              </code>
              和
              <code className="mx-1 rounded bg-muted px-1 py-0.5 text-[11px]">
                x-api-key
              </code>
              两种方式。
            </div>

            <div className="space-y-3">
              {config.apiKeys.map((item, index) => (
                <div
                  key={item.id}
                  className="space-y-3 rounded-xl border p-4"
                >
                  <div className="flex items-center justify-between">
                    <div className="text-sm font-medium">
                      Key #{index + 1}
                    </div>
                    <Button
                      type="button"
                      variant="ghost"
                      size="sm"
                      onClick={() => handleRemoveKey(item.id)}
                    >
                      <Trash2 className="mr-2 h-4 w-4" />
                      删除
                    </Button>
                  </div>
                  <div className="grid gap-3 md:grid-cols-2">
                    <div className="space-y-2">
                      <Label>名称</Label>
                      <Input
                        value={item.name}
                        onChange={(event) =>
                          setConfig((current) => ({
                            ...current,
                            apiKeys: current.apiKeys.map((record) =>
                              record.id === item.id
                                ? { ...record, name: event.target.value }
                                : record,
                            ),
                          }))
                        }
                        placeholder="渠道 A / 合作方 B"
                      />
                    </div>
                    <div className="space-y-2">
                      <Label>Key ID</Label>
                      <Input
                        value={item.id}
                        onChange={(event) =>
                          setConfig((current) => ({
                            ...current,
                            apiKeys: current.apiKeys.map((record) =>
                              record.id === item.id
                                ? { ...record, id: event.target.value }
                                : record,
                            ),
                          }))
                        }
                        placeholder="partner-a"
                      />
                    </div>
                  </div>
                  <div className="space-y-2">
                    <Label>API Key</Label>
                    <Input
                      value={item.apiKey}
                      onChange={(event) =>
                        setConfig((current) => ({
                          ...current,
                          apiKeys: current.apiKeys.map((record) =>
                            record.id === item.id
                              ? { ...record, apiKey: event.target.value }
                              : record,
                          ),
                        }))
                      }
                      placeholder="请输入调用第三方生图 API 的密钥"
                    />
                    <div className="text-xs text-muted-foreground">
                      当前显示：{maskExternalImageApiKey(item.apiKey)}
                    </div>
                  </div>
                  <div className="space-y-2">
                    <Label>备注</Label>
                    <Textarea
                      rows={2}
                      value={item.notes}
                      onChange={(event) =>
                        setConfig((current) => ({
                          ...current,
                          apiKeys: current.apiKeys.map((record) =>
                            record.id === item.id
                              ? { ...record, notes: event.target.value }
                              : record,
                          ),
                        }))
                      }
                      placeholder="可以记录对接方、用途、流量限制等"
                    />
                  </div>
                  <div className="flex items-center justify-between rounded-lg border p-3">
                    <div className="text-xs text-muted-foreground">
                      单独停用后，这个 Key 会立即失效，但不会影响其他 Key。
                    </div>
                    <div className="flex items-center gap-2">
                      <Switch
                        checked={item.enabled}
                        onCheckedChange={(checked) =>
                          setConfig((current) => ({
                            ...current,
                            apiKeys: current.apiKeys.map((record) =>
                              record.id === item.id
                                ? { ...record, enabled: checked }
                                : record,
                            ),
                          }))
                        }
                      />
                      <span className="text-sm text-muted-foreground">
                        {item.enabled ? "已启用" : "已停用"}
                      </span>
                    </div>
                  </div>
                </div>
              ))}
            </div>

            <div className="flex flex-wrap gap-2">
              <Button type="button" variant="outline" onClick={handleAddKey}>
                <Plus className="mr-2 h-4 w-4" />
                新增 API Key
              </Button>
              <Button type="button" onClick={handleSave} disabled={isSaving}>
                <Save className="mr-2 h-4 w-4" />
                {isSaving ? "保存中..." : "保存配置"}
              </Button>
            </div>
          </div>

          <div className="space-y-4 rounded-xl border p-4">
            <div className="space-y-1">
              <div className="text-base font-medium">调用说明</div>
              <div className="text-sm text-muted-foreground">
                这条第三方接口直接复用我们系统里启用的生图模型、模型名称和存储链路。
              </div>
            </div>

            <div className="rounded-xl border border-dashed bg-muted/20 p-4 text-sm">
              <div className="font-medium">接口 1：获取模型</div>
              <code className="mt-2 block rounded bg-background px-3 py-2 text-xs">
                GET /api/external/image/models
              </code>
            </div>

            <div className="rounded-xl border border-dashed bg-muted/20 p-4 text-sm">
              <div className="font-medium">接口 2：发起生图</div>
              <code className="mt-2 block whitespace-pre-wrap rounded bg-background px-3 py-2 text-xs">
                {`POST /api/external/image/generate
{
  "model": "模型 UUID / 模型ID / 显示名称",
  "prompt": "请生成一张暖色家居客厅图",
  "negativePrompt": "不要出现人物",
  "imageCount": 2,
  "aspectRatio": "16:9",
  "imageSize": "2K"
}`}
              </code>
            </div>

            <div className="rounded-xl border border-dashed bg-muted/20 p-4 text-sm text-muted-foreground">
              返回图片地址会优先上传到我们的储存桶，然后再写入
              <code className="mx-1 rounded bg-background px-1 py-0.5 text-[11px]">
                GeneratedImage
              </code>
              和媒体资产表。
            </div>
          </div>
        </div>

        <div className="space-y-3 rounded-xl border p-4">
          <div className="space-y-1">
            <div className="text-base font-medium">最近 50 条请求日志</div>
            <div className="text-sm text-muted-foreground">
              这里会记录 API Key、模型、提示词、生成张数、耗时和结果地址，方便排查对接问题。
            </div>
          </div>

          <div className="space-y-3">
            {logsData?.data?.logs?.length ? (
              logsData.data.logs.map((log) => (
                <div key={log.id} className="rounded-lg border p-4">
                  <div className="flex flex-wrap items-center gap-2">
                    <div className="font-medium">
                      {log.modelDisplayName || log.modelRuntimeId || "未记录模型"}
                    </div>
                    <span
                      className={
                        log.status === "succeeded"
                          ? "rounded-full bg-emerald-500/10 px-2 py-0.5 text-xs text-emerald-600"
                          : log.status === "failed"
                            ? "rounded-full bg-rose-500/10 px-2 py-0.5 text-xs text-rose-600"
                            : "rounded-full bg-slate-500/10 px-2 py-0.5 text-xs text-slate-600"
                      }
                    >
                      {log.status}
                    </span>
                    <span className="rounded-full bg-muted px-2 py-0.5 text-xs text-muted-foreground">
                      {log.apiKeyName || log.apiKeyId || "未命名 Key"}
                    </span>
                  </div>
                  <div className="mt-2 text-sm text-muted-foreground">
                    {log.prompt || "无提示词"}
                  </div>
                  <div className="mt-3 grid gap-2 text-xs text-muted-foreground md:grid-cols-2 xl:grid-cols-4">
                    <div>归属用户：{log.ownerUserEmail || "-"}</div>
                    <div>生成张数：{log.imageCount}</div>
                    <div>
                      规格：{log.aspectRatio || "-"} / {log.imageSize || "-"}
                    </div>
                    <div>
                      耗时：{typeof log.durationMs === "number" ? `${log.durationMs}ms` : "-"}
                    </div>
                    <div>请求 IP：{log.requesterIp || "-"}</div>
                    <div>生成图片：{log.generatedImageUrls?.length || 0} 张</div>
                    <div>开始时间：{formatBeijingTime(log.createdAt)}</div>
                    <div>
                      完成时间：
                      {log.completedAt ? formatBeijingTime(log.completedAt) : "-"}
                    </div>
                  </div>
                  {log.errorMessage ? (
                    <div className="mt-3 rounded-lg bg-rose-500/5 px-3 py-2 text-sm text-rose-600">
                      {log.errorMessage}
                    </div>
                  ) : null}
                </div>
              ))
            ) : (
              <div className="rounded-lg border border-dashed p-6 text-center text-sm text-muted-foreground">
                还没有第三方生图 API 请求记录。
              </div>
            )}
          </div>
        </div>
      </div>
    </LocalAiSectionShell>
  );
}