import "server-only";

import { getAiProvidersByType } from "@/lib/db/queries";
import type { TripoProviderConfig } from "./types";

const DEFAULT_TRIPO_BASE_URL = "https://api.tripo3d.ai/v2/openapi";
let tripoProviderCursor = 0;

function sanitizeTripoApiKey(value: string): string {
  return String(value || "")
    .replace(/[\u2028\u2029]/g, "")
    .replace(/[\u0000-\u001F\u007F]/g, "")
    .replace(/\s+/g, "")
    .trim();
}

function sanitizeTripoBaseUrl(value: string): string {
  return String(value || "")
    .replace(/[\u2028\u2029]/g, "")
    .replace(/[\u0000-\u001F\u007F]/g, "")
    .trim();
}

export async function getTripoProviderConfigs(): Promise<TripoProviderConfig[]> {
  const providers = await getAiProvidersByType({
    type: "tripo-3d",
    enabledOnly: true,
  });

  const normalizedProviders = providers
    .map((provider): TripoProviderConfig | null => {
      const providerApiKey = sanitizeTripoApiKey(String(provider.apiKey || ""));
      if (!providerApiKey) return null;
      return {
        apiKey: providerApiKey,
        baseUrl:
          sanitizeTripoBaseUrl(String(provider.baseUrl || "")) ||
          DEFAULT_TRIPO_BASE_URL,
        providerId: provider.id,
        providerName: provider.name,
      };
    })
    .filter((item): item is TripoProviderConfig => Boolean(item));

  if (normalizedProviders.length > 0) {
    return normalizedProviders;
  }

  const envApiKey = sanitizeTripoApiKey(String(process.env.TRIPO_API_KEY || ""));
  if (!envApiKey) {
    return [];
  }

  return [
    {
      apiKey: envApiKey,
      baseUrl:
        sanitizeTripoBaseUrl(String(process.env.TRIPO_BASE_URL || "")) ||
        DEFAULT_TRIPO_BASE_URL,
      providerName: "TRIPO_API_KEY",
    },
  ];
}

export async function getTripoProviderConfig(
  preferredProviderId?: string | null,
): Promise<TripoProviderConfig> {
  const providers = await getTripoProviderConfigs();
  const normalizedPreferredProviderId = String(preferredProviderId || "").trim();

  if (normalizedPreferredProviderId) {
    const matchedProvider = providers.find(
      (provider) => provider.providerId === normalizedPreferredProviderId,
    );
    if (matchedProvider) return matchedProvider;
  }

  const tripoProvider =
    providers.length > 0
      ? providers[tripoProviderCursor % providers.length]
      : null;
  if (providers.length > 0) {
    tripoProviderCursor = (tripoProviderCursor + 1) % providers.length;
  }
  if (tripoProvider) return tripoProvider;

  throw new Error("未配置 Tripo3D API，请在系统设置-本地AI新增 Tripo3D 提供商");
}