import "server-only";

import {
  getAiProvidersByType,
  updateAiProvider,
} from "@/lib/db/queries";
import type { WorldLabsProviderConfig } from "./types";

const DEFAULT_WORLDLABS_BASE_URL = "https://api.worldlabs.ai";
let worldLabsProviderCursor = 0;

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

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

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

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

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

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

  return [
    {
      apiKey: envApiKey,
      baseUrl:
        sanitizeWorldLabsBaseUrl(String(process.env.WORLDLABS_BASE_URL || "")) ||
        DEFAULT_WORLDLABS_BASE_URL,
      providerName: "WORLDLABS_API_KEY",
    },
  ];
}

export async function getWorldLabsProviderConfig(
  preferredProviderId?: string | null
): Promise<WorldLabsProviderConfig> {
  const providers = await getWorldLabsProviderConfigs();
  const preferredId = String(preferredProviderId || "").trim();
  if (preferredId) {
    const matchedProvider =
      providers.find((item) => item.providerId === preferredId) || null;
    if (matchedProvider) {
      return matchedProvider;
    }
  }

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

  if (worldLabsProvider) {
    return worldLabsProvider;
  }

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

export async function disableWorldLabsProvider(
  providerId?: string | null,
  reason?: string
) {
  const normalizedProviderId = String(providerId || "").trim();
  if (!normalizedProviderId) return;

  try {
    await updateAiProvider({
      id: normalizedProviderId,
      isEnabled: false,
    });
    console.warn(
      `[WorldLabsPool] Disabled provider ${normalizedProviderId}${
        reason ? `: ${reason}` : ""
      }`
    );
  } catch (error) {
    console.error("[WorldLabsPool] Failed to disable provider:", {
      providerId: normalizedProviderId,
      reason,
      error: error instanceof Error ? error.message : String(error),
    });
  }
}