/**
 * Cloud model providers the user can bring their own key for. Every one of
 * them speaks the OpenAI Chat Completions shape (Anthropic ships an official
 * compatibility layer at the same path), so one adapter covers them all —
 * plus a "custom" entry for any other OpenAI-compatible endpoint.
 *
 * Shared by the client (key inputs, pickers) and the server (routing): no
 * secrets live here.
 */

export type ProviderInfo = {
  id: string;
  label: string;
  /** OpenAI-compatible API base. Empty for the custom provider. */
  baseUrl: string;
  /** Placeholder shown in the key input. */
  keyHint: string;
  /** Where to create a key. */
  docs: string;
  /**
   * Models offered before the live listing arrives (and on providers whose
   * /models needs a paid tier). Free-tier ids first where they exist.
   */
  models: string[];
};

export const PROVIDERS: ProviderInfo[] = [
  {
    id: "openai",
    label: "OpenAI",
    baseUrl: "https://api.openai.com/v1",
    keyHint: "sk-…",
    docs: "https://platform.openai.com/api-keys",
    models: ["gpt-4o-mini", "gpt-4o", "o4-mini"],
  },
  {
    id: "anthropic",
    label: "Anthropic (Claude)",
    baseUrl: "https://api.anthropic.com/v1",
    keyHint: "sk-ant-…",
    docs: "https://console.anthropic.com/settings/keys",
    models: ["claude-sonnet-4-5", "claude-haiku-4-5", "claude-3-5-haiku-latest"],
  },
  {
    id: "deepseek",
    label: "DeepSeek",
    baseUrl: "https://api.deepseek.com/v1",
    keyHint: "sk-…",
    docs: "https://platform.deepseek.com/api_keys",
    models: ["deepseek-chat", "deepseek-reasoner"],
  },
  {
    id: "groq",
    label: "Groq",
    baseUrl: "https://api.groq.com/openai/v1",
    keyHint: "gsk_…",
    docs: "https://console.groq.com/keys",
    models: ["llama-3.3-70b-versatile", "llama-3.1-8b-instant", "openai/gpt-oss-120b"],
  },
  {
    id: "openrouter",
    label: "OpenRouter",
    baseUrl: "https://openrouter.ai/api/v1",
    keyHint: "sk-or-…",
    docs: "https://openrouter.ai/keys",
    models: [
      "meta-llama/llama-3.3-70b-instruct:free",
      "deepseek/deepseek-chat-v3-0324:free",
      "qwen/qwen3-235b-a22b:free",
    ],
  },
  {
    id: "gemini",
    label: "Google Gemini",
    baseUrl: "https://generativelanguage.googleapis.com/v1beta/openai",
    keyHint: "AIza…",
    docs: "https://aistudio.google.com/app/apikey",
    models: ["gemini-2.5-flash", "gemini-2.5-pro", "gemini-2.0-flash"],
  },
  {
    id: "custom",
    label: "Custom (OpenAI-compatible)",
    baseUrl: "",
    keyHint: "key…",
    docs: "",
    models: [],
  },
];

export function providerInfo(id: string): ProviderInfo | undefined {
  return PROVIDERS.find((provider) => provider.id === id);
}

/** Headers the browser sends so the server can reach the picked provider. */
export const PROVIDER_HEADER = "x-freezmo-provider";
export const PROVIDER_KEY_HEADER = "x-freezmo-provider-key";
export const PROVIDER_BASE_HEADER = "x-freezmo-provider-base";