import { useCallback, useState } from "react";
import { useTranslation } from "react-i18next";
import { Plus } from "lucide-react";
import { toast } from "sonner";
import { Button } from "@/components/ui/button";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { FullScreenPanel } from "@/components/common/FullScreenPanel";
import type { Provider, CustomEndpoint, UniversalProvider } from "@/types";
import type { AppId } from "@/lib/api";
import { universalProvidersApi } from "@/lib/api";
import {
  ProviderForm,
  type ProviderFormValues,
} from "@/components/providers/forms/ProviderForm";
import { UniversalProviderFormModal } from "@/components/universal/UniversalProviderFormModal";
import { UniversalProviderPanel } from "@/components/universal";
import { providerPresets } from "@/config/claudeProviderPresets";
import { codexProviderPresets } from "@/config/codexProviderPresets";
import { geminiProviderPresets } from "@/config/geminiProviderPresets";
// Note: opencodeProviderPresets is loaded via ProviderForm, not needed here
import type { UniversalProviderPreset } from "@/config/universalProviderPresets";

interface AddProviderDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  appId: AppId;
  onSubmit: (provider: Omit<Provider, "id"> & { providerKey?: string }) => Promise<void> | void;
}

export function AddProviderDialog({
  open,
  onOpenChange,
  appId,
  onSubmit,
}: AddProviderDialogProps) {
  const { t } = useTranslation();
  // OpenCode doesn't support universal providers
  const showUniversalTab = appId !== "opencode";
  const [activeTab, setActiveTab] = useState<"app-specific" | "universal">(
    "app-specific",
  );
  const [universalFormOpen, setUniversalFormOpen] = useState(false);
  const [selectedUniversalPreset, setSelectedUniversalPreset] =
    useState<UniversalProviderPreset | null>(null);

  // Handle universal provider save
  const handleUniversalProviderSave = useCallback(
    async (provider: UniversalProvider) => {
      try {
        await universalProvidersApi.upsert(provider);
        toast.success(
          t("universalProvider.addSuccess", {
            defaultValue: "统一供应商添加成功",
          }),
        );
        setUniversalFormOpen(false);
        setSelectedUniversalPreset(null);
        onOpenChange(false);
      } catch (error) {
        console.error(
          "[AddProviderDialog] Failed to save universal provider",
          error,
        );
        toast.error(
          t("universalProvider.addFailed", {
            defaultValue: "统一供应商添加失败",
          }),
        );
      }
    },
    [t, onOpenChange],
  );

  // Close universal form and return to main dialog
  const handleUniversalFormClose = useCallback(() => {
    setUniversalFormOpen(false);
    setSelectedUniversalPreset(null);
  }, []);

  const handleSubmit = useCallback(
    async (values: ProviderFormValues) => {
      const parsedConfig = JSON.parse(values.settingsConfig) as Record<
        string,
        unknown
      >;

      // 构造基础提交数据
      const providerData: Omit<Provider, "id"> & { providerKey?: string } = {
        name: values.name.trim(),
        notes: values.notes?.trim() || undefined,
        websiteUrl: values.websiteUrl?.trim() || undefined,
        settingsConfig: parsedConfig,
        icon: values.icon?.trim() || undefined,
        iconColor: values.iconColor?.trim() || undefined,
        ...(values.presetCategory ? { category: values.presetCategory } : {}),
        ...(values.meta ? { meta: values.meta } : {}),
      };

      // OpenCode: pass providerKey for ID generation
      if (appId === "opencode" && values.providerKey) {
        providerData.providerKey = values.providerKey;
      }

      const hasCustomEndpoints =
        providerData.meta?.custom_endpoints &&
        Object.keys(providerData.meta.custom_endpoints).length > 0;

      if (!hasCustomEndpoints) {
        // 收集端点候选（仅在缺少自定义端点时兜底）
        const urlSet = new Set<string>();

        const addUrl = (rawUrl?: string) => {
          const url = (rawUrl || "").trim().replace(/\/+$/, "");
          if (url && url.startsWith("http")) {
            urlSet.add(url);
          }
        };

        if (values.presetId) {
          if (appId === "claude") {
            const presets = providerPresets;
            const presetIndex = parseInt(
              values.presetId.replace("claude-", ""),
            );
            if (
              !isNaN(presetIndex) &&
              presetIndex >= 0 &&
              presetIndex < presets.length
            ) {
              const preset = presets[presetIndex];
              if (preset?.endpointCandidates) {
                preset.endpointCandidates.forEach(addUrl);
              }
            }
          } else if (appId === "codex") {
            const presets = codexProviderPresets;
            const presetIndex = parseInt(values.presetId.replace("codex-", ""));
            if (
              !isNaN(presetIndex) &&
              presetIndex >= 0 &&
              presetIndex < presets.length
            ) {
              const preset = presets[presetIndex];
              if (Array.isArray(preset.endpointCandidates)) {
                preset.endpointCandidates.forEach(addUrl);
              }
            }
          } else if (appId === "gemini") {
            const presets = geminiProviderPresets;
            const presetIndex = parseInt(
              values.presetId.replace("gemini-", ""),
            );
            if (
              !isNaN(presetIndex) &&
              presetIndex >= 0 &&
              presetIndex < presets.length
            ) {
              const preset = presets[presetIndex];
              if (Array.isArray(preset.endpointCandidates)) {
                preset.endpointCandidates.forEach(addUrl);
              }
            }
          }
          // Note: OpenCode doesn't use endpointCandidates - it handles endpoints internally
        }

        if (appId === "claude") {
          const env = parsedConfig.env as Record<string, any> | undefined;
          if (env?.ANTHROPIC_BASE_URL) {
            addUrl(env.ANTHROPIC_BASE_URL);
          }
        } else if (appId === "codex") {
          const config = parsedConfig.config as string | undefined;
          if (config) {
            const baseUrlMatch = config.match(
              /base_url\s*=\s*["']([^"']+)["']/,
            );
            if (baseUrlMatch?.[1]) {
              addUrl(baseUrlMatch[1]);
            }
          }
        } else if (appId === "gemini") {
          const env = parsedConfig.env as Record<string, any> | undefined;
          if (env?.GOOGLE_GEMINI_BASE_URL) {
            addUrl(env.GOOGLE_GEMINI_BASE_URL);
          }
        } else if (appId === "opencode") {
          // OpenCode uses options.baseURL
          const options = parsedConfig.options as Record<string, any> | undefined;
          if (options?.baseURL) {
            addUrl(options.baseURL);
          }
        }

        const urls = Array.from(urlSet);
        if (urls.length > 0) {
          const now = Date.now();
          const customEndpoints: Record<string, CustomEndpoint> = {};
          urls.forEach((url) => {
            customEndpoints[url] = {
              url,
              addedAt: now,
              lastUsed: undefined,
            };
          });

          providerData.meta = {
            ...(providerData.meta ?? {}),
            custom_endpoints: customEndpoints,
          };
        }
      }

      await onSubmit(providerData);
      onOpenChange(false);
    },
    [appId, onSubmit, onOpenChange],
  );

  // 动态 footer：根据当前 Tab 显示不同按钮
  const footer =
    !showUniversalTab || activeTab === "app-specific" ? (
      <>
        <Button
          variant="outline"
          onClick={() => onOpenChange(false)}
          className="border-border/20 hover:bg-accent hover:text-accent-foreground"
        >
          {t("common.cancel")}
        </Button>
        <Button
          type="submit"
          form="provider-form"
          className="bg-primary text-primary-foreground hover:bg-primary/90"
        >
          <Plus className="h-4 w-4 mr-2" />
          {t("common.add")}
        </Button>
      </>
    ) : (
      <>
        <Button
          variant="outline"
          onClick={() => onOpenChange(false)}
          className="border-border/20 hover:bg-accent hover:text-accent-foreground"
        >
          {t("common.cancel")}
        </Button>
        <Button
          onClick={() => setUniversalFormOpen(true)}
          className="bg-primary text-primary-foreground hover:bg-primary/90"
        >
          <Plus className="h-4 w-4 mr-2" />
          {t("universalProvider.add")}
        </Button>
      </>
    );

  return (
    <FullScreenPanel
      isOpen={open}
      title={t("provider.addNewProvider")}
      onClose={() => onOpenChange(false)}
      footer={footer}
    >
      {showUniversalTab ? (
        <Tabs
          value={activeTab}
          onValueChange={(v) => setActiveTab(v as "app-specific" | "universal")}
        >
          <TabsList className="grid w-full grid-cols-2 mb-6">
            <TabsTrigger value="app-specific">
              {t(`apps.${appId}`)} {t("provider.tabProvider")}
            </TabsTrigger>
            <TabsTrigger value="universal">
              {t("provider.tabUniversal")}
            </TabsTrigger>
          </TabsList>

          <TabsContent value="app-specific" className="mt-0">
            <ProviderForm
              appId={appId}
              submitLabel={t("common.add")}
              onSubmit={handleSubmit}
              onCancel={() => onOpenChange(false)}
              showButtons={false}
            />
          </TabsContent>

          <TabsContent value="universal" className="mt-0">
            <UniversalProviderPanel />
          </TabsContent>
        </Tabs>
      ) : (
        // OpenCode: directly show form without tabs
        <ProviderForm
          appId={appId}
          submitLabel={t("common.add")}
          onSubmit={handleSubmit}
          onCancel={() => onOpenChange(false)}
          showButtons={false}
        />
      )}

      {/* Universal Provider Form Modal */}
      {showUniversalTab && (
        <UniversalProviderFormModal
          isOpen={universalFormOpen}
          onClose={handleUniversalFormClose}
          onSave={handleUniversalProviderSave}
          initialPreset={selectedUniversalPreset}
        />
      )}
    </FullScreenPanel>
  );
}