import type { AIProviderAdapter, ProviderId } from "@/lib/ai/core/types";
import { anthropicAdapter } from "./anthropic";
import { openaiAdapter } from "./openai";
import { geminiAdapter } from "./gemini";
import { xaiAdapter } from "./xai";
import { mistralAdapter } from "./mistral";
import { deepseekAdapter } from "./deepseek";
import { kimiAdapter } from "./kimi";
import { openrouterAdapter } from "./openrouter";
import { cerebrasAdapter } from "./cerebras";
import { customPlaceholderAdapter } from "./custom";

const ADAPTERS: Record<ProviderId, AIProviderAdapter> = {
  openai: openaiAdapter,
  anthropic: anthropicAdapter,
  gemini: geminiAdapter,
  xai: xaiAdapter,
  mistral: mistralAdapter,
  deepseek: deepseekAdapter,
  kimi: kimiAdapter,
  openrouter: openrouterAdapter,
  cerebras: cerebrasAdapter,
  // Per-endpoint adapters are built by `resolveCustomEndpoint()` (lib/endpoints/service); this entry only keeps the map exhaustive.
  custom: customPlaceholderAdapter,
};

export function getAdapter(provider: ProviderId): AIProviderAdapter {
  const a = ADAPTERS[provider];
  if (!a) throw new Error(`Unknown provider: ${provider}`);
  return a;
}

export function listAdapters(): AIProviderAdapter[] {
  return Object.values(ADAPTERS);
}

/** Static, client-safe provider metadata. */
export const PROVIDER_META: Record<ProviderId, { name: string; shortName: string; keyDocsUrl: string; keyPrefixHint: string; color: string; description: string; consoleUrl: string }> = {
  openai: {
    name: "OpenAI",
    shortName: "OpenAI",
    keyDocsUrl: "https://platform.openai.com/api-keys",
    keyPrefixHint: "sk-",
    color: "var(--p-openai)",
    description: "GPT-5.x, o-series reasoning models, GPT-4.1 — via the Responses API.",
    consoleUrl: "https://platform.openai.com",
  },
  anthropic: {
    name: "Anthropic",
    shortName: "Anthropic",
    keyDocsUrl: "https://platform.claude.com/settings/keys",
    keyPrefixHint: "sk-ant-",
    color: "var(--p-anthropic)",
    description: "Claude Fable, Opus, Sonnet and Haiku — adaptive thinking, 1M context.",
    consoleUrl: "https://platform.claude.com",
  },
  gemini: {
    name: "Google Gemini",
    shortName: "Gemini",
    keyDocsUrl: "https://aistudio.google.com/apikey",
    keyPrefixHint: "AIza / AQ.",
    color: "var(--p-gemini)",
    description: "Gemini 3.x Flash and Pro, 2.5 family — Gemini Developer API.",
    consoleUrl: "https://aistudio.google.com",
  },
  xai: {
    name: "xAI",
    shortName: "xAI",
    keyDocsUrl: "https://console.x.ai",
    keyPrefixHint: "xai-",
    color: "var(--p-xai)",
    description: "Grok 4.x reasoning and non-reasoning models with live search.",
    consoleUrl: "https://console.x.ai",
  },
  mistral: { name: "Mistral AI", shortName: "Mistral", keyDocsUrl: "https://console.mistral.ai/api-keys", keyPrefixHint: "", color: "var(--p-mistral)", description: "Mistral Large / Medium / Small, Ministral, Magistral, Codestral.", consoleUrl: "https://console.mistral.ai" },
  deepseek: { name: "DeepSeek", shortName: "DeepSeek", keyDocsUrl: "https://platform.deepseek.com/api_keys", keyPrefixHint: "sk-", color: "var(--p-deepseek)", description: "DeepSeek V4 Flash / Pro with thinking mode.", consoleUrl: "https://platform.deepseek.com" },
  kimi: { name: "Kimi (Moonshot AI)", shortName: "Kimi", keyDocsUrl: "https://platform.moonshot.ai/console/api-keys", keyPrefixHint: "sk-", color: "var(--p-kimi)", description: "Kimi K2.6 / K2.7 Code / K3.", consoleUrl: "https://platform.moonshot.ai" },
  openrouter: { name: "OpenRouter", shortName: "OpenRouter", keyDocsUrl: "https://openrouter.ai/settings/keys", keyPrefixHint: "sk-or-v1-", color: "var(--p-openrouter)", description: "Hundreds of models behind one key.", consoleUrl: "https://openrouter.ai" },
  cerebras: { name: "Cerebras", shortName: "Cerebras", keyDocsUrl: "https://cloud.cerebras.ai/", keyPrefixHint: "csk-", color: "var(--p-cerebras)", description: "Ultra-fast inference for open models.", consoleUrl: "https://cloud.cerebras.ai" },
  custom: { name: "Custom endpoints", shortName: "Custom", keyDocsUrl: "/app/settings/endpoints", keyPrefixHint: "", color: "var(--p-custom)", description: "Your own OpenAI-compatible servers — Ollama, LM Studio, vLLM, llama.cpp, MLX.", consoleUrl: "/app/settings/endpoints" },
};