import path from "node:path";
import { type Api, type Model } from "@mariozechner/pi-ai";
import { formatCliCommand } from "../cli/command-format.js";
import { getRuntimeConfigSnapshot, type OpenClawConfig } from "../config/config.js";
import type { ModelProviderAuthMode, ModelProviderConfig } from "../config/types.js";
import { coerceSecretRef } from "../config/types.secrets.js";
import { getShellEnvAppliedKeys } from "../infra/shell-env.js";
import { createSubsystemLogger } from "../logging/subsystem.js";
import {
  buildProviderMissingAuthMessageWithPlugin,
  resolveProviderSyntheticAuthWithPlugin,
  shouldDeferProviderSyntheticProfileAuthWithPlugin,
} from "../plugins/provider-runtime.js";
import { resolveOwningPluginIdsForProvider } from "../plugins/providers.js";
import {
  normalizeLowercaseStringOrEmpty,
  normalizeOptionalLowercaseString,
} from "../shared/string-coerce.js";
import { normalizeOptionalSecretInput } from "../utils/normalize-secret-input.js";
import {
  type AuthProfileStore,
  ensureAuthProfileStore,
  listProfilesForProvider,
  resolveApiKeyForProfile,
  resolveAuthProfileOrder,
  resolveAuthStorePathForDisplay,
} from "./auth-profiles.js";
import { resolveEnvApiKey, type EnvApiKeyResult } from "./model-auth-env.js";
import {
  CUSTOM_LOCAL_AUTH_MARKER,
  isKnownEnvApiKeyMarker,
  isNonSecretApiKeyMarker,
  NON_ENV_SECRETREF_MARKER,
} from "./model-auth-markers.js";
import {
  requireApiKey,
  resolveAwsSdkEnvVarName,
  type ResolvedProviderAuth,
} from "./model-auth-runtime-shared.js";
import { normalizeProviderId } from "./model-selection.js";

export { ensureAuthProfileStore, resolveAuthProfileOrder } from "./auth-profiles.js";
export { requireApiKey, resolveAwsSdkEnvVarName } from "./model-auth-runtime-shared.js";
export type { ResolvedProviderAuth } from "./model-auth-runtime-shared.js";
export type ProviderCredentialPrecedence = "profile-first" | "env-first";

const log = createSubsystemLogger("model-auth");
function resolveProviderConfig(
  cfg: OpenClawConfig | undefined,
  provider: string,
): ModelProviderConfig | undefined {
  const providers = cfg?.models?.providers ?? {};
  const direct = providers[provider] as ModelProviderConfig | undefined;
  if (direct) {
    return direct;
  }
  const normalized = normalizeProviderId(provider);
  if (normalized === provider) {
    const matched = Object.entries(providers).find(
      ([key]) => normalizeProviderId(key) === normalized,
    );
    return matched?.[1];
  }
  return (
    (providers[normalized] as ModelProviderConfig | undefined) ??
    Object.entries(providers).find(([key]) => normalizeProviderId(key) === normalized)?.[1]
  );
}

export function getCustomProviderApiKey(
  cfg: OpenClawConfig | undefined,
  provider: string,
): string | undefined {
  const entry = resolveProviderConfig(cfg, provider);
  return normalizeOptionalSecretInput(entry?.apiKey);
}

type ResolvedCustomProviderApiKey = {
  apiKey: string;
  source: string;
};

export function resolveUsableCustomProviderApiKey(params: {
  cfg: OpenClawConfig | undefined;
  provider: string;
  env?: NodeJS.ProcessEnv;
}): ResolvedCustomProviderApiKey | null {
  const customKey = getCustomProviderApiKey(params.cfg, params.provider);
  if (!customKey) {
    return null;
  }
  if (!isNonSecretApiKeyMarker(customKey)) {
    return { apiKey: customKey, source: "models.json" };
  }
  if (!isKnownEnvApiKeyMarker(customKey)) {
    return null;
  }
  const envValue = normalizeOptionalSecretInput((params.env ?? process.env)[customKey]);
  if (!envValue) {
    return null;
  }
  const applied = new Set(getShellEnvAppliedKeys());
  return {
    apiKey: envValue,
    source: resolveEnvSourceLabel({
      applied,
      envVars: [customKey],
      label: `${customKey} (models.json marker)`,
    }),
  };
}

export function hasUsableCustomProviderApiKey(
  cfg: OpenClawConfig | undefined,
  provider: string,
  env?: NodeJS.ProcessEnv,
): boolean {
  return Boolean(resolveUsableCustomProviderApiKey({ cfg, provider, env }));
}

export function shouldPreferExplicitConfigApiKeyAuth(
  cfg: OpenClawConfig | undefined,
  provider: string,
): boolean {
  const providerConfig = resolveProviderConfig(cfg, provider);
  return (
    resolveProviderAuthOverride(cfg, provider) === "api-key" &&
    providerConfig !== undefined &&
    hasExplicitProviderApiKeyConfig(providerConfig)
  );
}

function resolveProviderAuthOverride(
  cfg: OpenClawConfig | undefined,
  provider: string,
): ModelProviderAuthMode | undefined {
  const entry = resolveProviderConfig(cfg, provider);
  const auth = entry?.auth;
  if (auth === "api-key" || auth === "aws-sdk" || auth === "oauth" || auth === "token") {
    return auth;
  }
  return undefined;
}

function isLocalBaseUrl(baseUrl: string): boolean {
  try {
    const host = normalizeLowercaseStringOrEmpty(new URL(baseUrl).hostname);
    return (
      host === "localhost" ||
      host === "127.0.0.1" ||
      host === "0.0.0.0" ||
      host === "[::1]" ||
      host === "[::ffff:7f00:1]" ||
      host === "[::ffff:127.0.0.1]"
    );
  } catch {
    return false;
  }
}

function hasExplicitProviderApiKeyConfig(providerConfig: ModelProviderConfig): boolean {
  return (
    normalizeOptionalSecretInput(providerConfig.apiKey) !== undefined ||
    coerceSecretRef(providerConfig.apiKey) !== null
  );
}

function isCustomLocalProviderConfig(providerConfig: ModelProviderConfig): boolean {
  return (
    typeof providerConfig.baseUrl === "string" &&
    providerConfig.baseUrl.trim().length > 0 &&
    typeof providerConfig.api === "string" &&
    providerConfig.api.trim().length > 0 &&
    Array.isArray(providerConfig.models) &&
    providerConfig.models.length > 0
  );
}

function isManagedSecretRefApiKeyMarker(apiKey: string | undefined): boolean {
  return apiKey?.trim() === NON_ENV_SECRETREF_MARKER;
}

type SyntheticProviderAuthResolution = {
  auth?: ResolvedProviderAuth;
  blockedOnManagedSecretRef?: boolean;
};

function resolveProviderSyntheticRuntimeAuth(params: {
  cfg: OpenClawConfig | undefined;
  provider: string;
}): SyntheticProviderAuthResolution {
  const resolveFromConfig = (
    config: OpenClawConfig | undefined,
  ): ResolvedProviderAuth | undefined => {
    const providerConfig = resolveProviderConfig(config, params.provider);
    return resolveProviderSyntheticAuthWithPlugin({
      provider: params.provider,
      config,
      context: {
        config,
        provider: params.provider,
        providerConfig,
      },
    });
  };

  const directAuth = resolveFromConfig(params.cfg);
  if (!directAuth) {
    return {};
  }
  if (!isManagedSecretRefApiKeyMarker(directAuth.apiKey)) {
    return { auth: directAuth };
  }

  const runtimeConfig = getRuntimeConfigSnapshot();
  if (!runtimeConfig || runtimeConfig === params.cfg) {
    return { blockedOnManagedSecretRef: true };
  }

  const runtimeAuth = resolveFromConfig(runtimeConfig);
  const runtimeApiKey = runtimeAuth?.apiKey;
  if (!runtimeAuth || !runtimeApiKey || isNonSecretApiKeyMarker(runtimeApiKey)) {
    return { blockedOnManagedSecretRef: true };
  }
  return {
    auth: runtimeAuth,
  };
}

function resolveSyntheticLocalProviderAuth(params: {
  cfg: OpenClawConfig | undefined;
  provider: string;
}): ResolvedProviderAuth | null {
  const syntheticProviderAuth = resolveProviderSyntheticRuntimeAuth(params);
  if (syntheticProviderAuth.auth) {
    return syntheticProviderAuth.auth;
  }
  if (syntheticProviderAuth.blockedOnManagedSecretRef) {
    return null;
  }

  const providerConfig = resolveProviderConfig(params.cfg, params.provider);
  if (!providerConfig) {
    return null;
  }

  const hasApiConfig =
    Boolean(providerConfig.api?.trim()) ||
    Boolean(providerConfig.baseUrl?.trim()) ||
    (Array.isArray(providerConfig.models) && providerConfig.models.length > 0);
  if (!hasApiConfig) {
    return null;
  }

  const authOverride = resolveProviderAuthOverride(params.cfg, params.provider);
  if (authOverride && authOverride !== "api-key") {
    return null;
  }
  if (!isCustomLocalProviderConfig(providerConfig)) {
    return null;
  }
  if (hasExplicitProviderApiKeyConfig(providerConfig)) {
    return null;
  }

  // Custom providers pointing at a local server (e.g. llama.cpp, vLLM, LocalAI)
  // typically don't require auth. Synthesize a local key so the auth resolver
  // doesn't reject them when the user left the API key blank during setup.
  if (providerConfig.baseUrl && isLocalBaseUrl(providerConfig.baseUrl)) {
    return {
      apiKey: CUSTOM_LOCAL_AUTH_MARKER,
      source: `models.providers.${params.provider} (synthetic local key)`,
      mode: "api-key",
    };
  }

  return null;
}

function resolveEnvSourceLabel(params: {
  applied: Set<string>;
  envVars: string[];
  label: string;
}): string {
  const shellApplied = params.envVars.some((envVar) => params.applied.has(envVar));
  const prefix = shellApplied ? "shell env: " : "env: ";
  return `${prefix}${params.label}`;
}

function resolveAwsSdkAuthInfo(): { mode: "aws-sdk"; source: string } {
  const applied = new Set(getShellEnvAppliedKeys());
  if (process.env.AWS_BEARER_TOKEN_BEDROCK?.trim()) {
    return {
      mode: "aws-sdk",
      source: resolveEnvSourceLabel({
        applied,
        envVars: ["AWS_BEARER_TOKEN_BEDROCK"],
        label: "AWS_BEARER_TOKEN_BEDROCK",
      }),
    };
  }
  if (process.env.AWS_ACCESS_KEY_ID?.trim() && process.env.AWS_SECRET_ACCESS_KEY?.trim()) {
    return {
      mode: "aws-sdk",
      source: resolveEnvSourceLabel({
        applied,
        envVars: ["AWS_ACCESS_KEY_ID", "AWS_SECRET_ACCESS_KEY"],
        label: "AWS_ACCESS_KEY_ID + AWS_SECRET_ACCESS_KEY",
      }),
    };
  }
  if (process.env.AWS_PROFILE?.trim()) {
    return {
      mode: "aws-sdk",
      source: resolveEnvSourceLabel({
        applied,
        envVars: ["AWS_PROFILE"],
        label: "AWS_PROFILE",
      }),
    };
  }
  return { mode: "aws-sdk", source: "aws-sdk default chain" };
}

function shouldDeferSyntheticProfileAuth(params: {
  cfg: OpenClawConfig | undefined;
  provider: string;
  resolvedApiKey: string | undefined;
}): boolean {
  const providerConfig = resolveProviderConfig(params.cfg, params.provider);
  return (
    shouldDeferProviderSyntheticProfileAuthWithPlugin({
      provider: params.provider,
      config: params.cfg,
      context: {
        config: params.cfg,
        provider: params.provider,
        providerConfig,
        resolvedApiKey: params.resolvedApiKey,
      },
    }) === true
  );
}

export async function resolveApiKeyForProvider(params: {
  provider: string;
  cfg?: OpenClawConfig;
  profileId?: string;
  preferredProfile?: string;
  store?: AuthProfileStore;
  agentDir?: string;
  /** When true, treat profileId as a user-locked selection that must not be
   *  silently overridden by env/config credentials (e.g. ollama-local). */
  lockedProfile?: boolean;
  credentialPrecedence?: ProviderCredentialPrecedence;
}): Promise<ResolvedProviderAuth> {
  const { provider, cfg, profileId, preferredProfile } = params;

  if (profileId) {
    const store = params.store ?? ensureAuthProfileStore(params.agentDir);
    const resolved = await resolveApiKeyForProfile({
      cfg,
      store,
      profileId,
      agentDir: params.agentDir,
    });
    if (!resolved) {
      throw new Error(`No credentials found for profile "${profileId}".`);
    }
    const mode = store.profiles[profileId]?.type;
    const result: ResolvedProviderAuth = {
      apiKey: resolved.apiKey,
      profileId,
      source: `profile:${profileId}`,
      mode: mode === "oauth" ? "oauth" : mode === "token" ? "token" : "api-key",
    };
    // When the resolved key is a provider-owned synthetic profile marker and
    // the caller has not locked this profile, fall through to env/config
    // resolution so provider-owned real credentials take precedence. The auth
    // controller iterates profile candidates and passes each as an explicit
    // profileId, so we cannot assume explicit === user-locked.
    if (
      !params.lockedProfile &&
      shouldDeferSyntheticProfileAuth({
        cfg,
        provider,
        resolvedApiKey: resolved.apiKey,
      })
    ) {
      return resolveApiKeyForProvider({ ...params, profileId: undefined, lockedProfile: true }) //
        .catch(() => result);
    }
    return result;
  }

  const authOverride = resolveProviderAuthOverride(cfg, provider);
  if (authOverride === "aws-sdk") {
    return resolveAwsSdkAuthInfo();
  }
  if (shouldPreferExplicitConfigApiKeyAuth(cfg, provider)) {
    const customKey = resolveUsableCustomProviderApiKey({ cfg, provider });
    if (customKey) {
      return {
        apiKey: customKey.apiKey,
        source: customKey.source,
        mode: "api-key",
      };
    }
  }
  const normalized = normalizeProviderId(provider);
  if (authOverride === undefined && normalized === "amazon-bedrock") {
    return resolveAwsSdkAuthInfo();
  }

  if (params.credentialPrecedence === "env-first") {
    const envResolved = resolveEnvApiKey(provider);
    if (envResolved) {
      const resolvedMode: ResolvedProviderAuth["mode"] = envResolved.source.includes("OAUTH_TOKEN")
        ? "oauth"
        : "api-key";
      return {
        apiKey: envResolved.apiKey,
        source: envResolved.source,
        mode: resolvedMode,
      };
    }
  }

  const providerConfig = resolveProviderConfig(cfg, provider);
  const store = params.store ?? ensureAuthProfileStore(params.agentDir);
  const order = resolveAuthProfileOrder({
    cfg,
    store,
    provider,
    preferredProfile,
  });
  let deferredAuthProfileResult: ResolvedProviderAuth | null = null;
  for (const candidate of order) {
    try {
      const resolved = await resolveApiKeyForProfile({
        cfg,
        store,
        profileId: candidate,
        agentDir: params.agentDir,
      });
      if (resolved) {
        const mode = store.profiles[candidate]?.type;
        const resolvedMode: ResolvedProviderAuth["mode"] =
          mode === "oauth" ? "oauth" : mode === "token" ? "token" : "api-key";
        const result: ResolvedProviderAuth = {
          apiKey: resolved.apiKey,
          profileId: candidate,
          source: `profile:${candidate}`,
          mode: resolvedMode,
        };
        if (
          shouldDeferSyntheticProfileAuth({
            cfg,
            provider,
            resolvedApiKey: resolved.apiKey,
          })
        ) {
          deferredAuthProfileResult ??= result;
          continue;
        }
        return result;
      }
    } catch (err) {
      log.debug?.(`auth profile "${candidate}" failed for provider "${provider}": ${String(err)}`);
    }
  }

  const envResolved = resolveEnvApiKey(provider);
  if (envResolved) {
    const resolvedMode: ResolvedProviderAuth["mode"] = envResolved.source.includes("OAUTH_TOKEN")
      ? "oauth"
      : "api-key";
    const result: ResolvedProviderAuth = {
      apiKey: envResolved.apiKey,
      source: envResolved.source,
      mode: resolvedMode,
    };
    return result;
  }

  const customKey = resolveUsableCustomProviderApiKey({ cfg, provider });
  if (customKey) {
    const result = { apiKey: customKey.apiKey, source: customKey.source, mode: "api-key" as const };
    return result;
  }

  if (deferredAuthProfileResult) {
    return deferredAuthProfileResult;
  }

  const syntheticLocalAuth = resolveSyntheticLocalProviderAuth({ cfg, provider });
  if (syntheticLocalAuth) {
    return syntheticLocalAuth;
  }

  const hasInlineConfiguredModels =
    Array.isArray(providerConfig?.models) && providerConfig.models.length > 0;
  const owningPluginIds = !hasInlineConfiguredModels
    ? resolveOwningPluginIdsForProvider({
        provider,
        config: cfg,
      })
    : undefined;
  if (owningPluginIds?.length) {
    const pluginMissingAuthMessage = buildProviderMissingAuthMessageWithPlugin({
      provider,
      config: cfg,
      context: {
        config: cfg,
        agentDir: params.agentDir,
        env: process.env,
        provider,
        listProfileIds: (providerId) => listProfilesForProvider(store, providerId),
      },
    });
    if (pluginMissingAuthMessage) {
      throw new Error(pluginMissingAuthMessage);
    }
  }

  const authStorePath = resolveAuthStorePathForDisplay(params.agentDir);
  const resolvedAgentDir = path.dirname(authStorePath);
  throw new Error(
    [
      `No API key found for provider "${provider}".`,
      `Auth store: ${authStorePath} (agentDir: ${resolvedAgentDir}).`,
      `Configure auth for this agent (${formatCliCommand("openclaw agents add <id>")}) or copy auth-profiles.json from the main agentDir.`,
    ].join(" "),
  );
}

export type ModelAuthMode = "api-key" | "oauth" | "token" | "mixed" | "aws-sdk" | "unknown";

export { resolveEnvApiKey } from "./model-auth-env.js";
export type { EnvApiKeyResult } from "./model-auth-env.js";

export function resolveModelAuthMode(
  provider?: string,
  cfg?: OpenClawConfig,
  store?: AuthProfileStore,
): ModelAuthMode | undefined {
  const resolved = provider?.trim();
  if (!resolved) {
    return undefined;
  }

  const authOverride = resolveProviderAuthOverride(cfg, resolved);
  if (authOverride === "aws-sdk") {
    return "aws-sdk";
  }

  const authStore = store ?? ensureAuthProfileStore();
  const profiles = listProfilesForProvider(authStore, resolved);
  if (profiles.length > 0) {
    const modes = new Set(
      profiles
        .map((id) => authStore.profiles[id]?.type)
        .filter((mode): mode is "api_key" | "oauth" | "token" => Boolean(mode)),
    );
    const distinct = ["oauth", "token", "api_key"].filter((k) =>
      modes.has(k as "oauth" | "token" | "api_key"),
    );
    if (distinct.length >= 2) {
      return "mixed";
    }
    if (modes.has("oauth")) {
      return "oauth";
    }
    if (modes.has("token")) {
      return "token";
    }
    if (modes.has("api_key")) {
      return "api-key";
    }
  }

  if (authOverride === undefined && normalizeProviderId(resolved) === "amazon-bedrock") {
    return "aws-sdk";
  }

  const envKey = resolveEnvApiKey(resolved);
  if (envKey?.apiKey) {
    return envKey.source.includes("OAUTH_TOKEN") ? "oauth" : "api-key";
  }

  if (hasUsableCustomProviderApiKey(cfg, resolved)) {
    return "api-key";
  }

  return "unknown";
}

export async function hasAvailableAuthForProvider(params: {
  provider: string;
  cfg?: OpenClawConfig;
  preferredProfile?: string;
  store?: AuthProfileStore;
  agentDir?: string;
}): Promise<boolean> {
  const { provider, cfg, preferredProfile } = params;

  const authOverride = resolveProviderAuthOverride(cfg, provider);
  if (authOverride === "aws-sdk") {
    return true;
  }
  if (resolveEnvApiKey(provider)) {
    return true;
  }
  if (resolveUsableCustomProviderApiKey({ cfg, provider })) {
    return true;
  }
  if (resolveSyntheticLocalProviderAuth({ cfg, provider })) {
    return true;
  }
  if (authOverride === undefined && normalizeProviderId(provider) === "amazon-bedrock") {
    return true;
  }

  const store = params.store ?? ensureAuthProfileStore(params.agentDir);
  const order = resolveAuthProfileOrder({
    cfg,
    store,
    provider,
    preferredProfile,
  });
  for (const candidate of order) {
    try {
      const resolved = await resolveApiKeyForProfile({
        cfg,
        store,
        profileId: candidate,
        agentDir: params.agentDir,
      });
      if (resolved) {
        return true;
      }
    } catch (err) {
      log.debug?.(`auth profile "${candidate}" failed for provider "${provider}": ${String(err)}`);
    }
  }
  return false;
}

export async function getApiKeyForModel(params: {
  model: Model<Api>;
  cfg?: OpenClawConfig;
  profileId?: string;
  preferredProfile?: string;
  store?: AuthProfileStore;
  agentDir?: string;
  lockedProfile?: boolean;
  credentialPrecedence?: ProviderCredentialPrecedence;
}): Promise<ResolvedProviderAuth> {
  return resolveApiKeyForProvider({
    provider: params.model.provider,
    cfg: params.cfg,
    profileId: params.profileId,
    preferredProfile: params.preferredProfile,
    store: params.store,
    agentDir: params.agentDir,
    lockedProfile: params.lockedProfile,
    credentialPrecedence: params.credentialPrecedence,
  });
}

export function applyLocalNoAuthHeaderOverride<T extends Model<Api>>(
  model: T,
  auth: ResolvedProviderAuth | null | undefined,
): T {
  if (auth?.apiKey !== CUSTOM_LOCAL_AUTH_MARKER || model.api !== "openai-completions") {
    return model;
  }

  // OpenAI's SDK always generates Authorization from apiKey. Keep the non-secret
  // placeholder so construction succeeds, then clear the header at request build
  // time for local servers that intentionally do not require auth.
  const headers = {
    ...model.headers,
    Authorization: null,
  } as unknown as Record<string, string>;

  return {
    ...model,
    headers,
  };
}

/**
 * When the provider config sets `authHeader: true`, inject an explicit
 * `Authorization: Bearer <apiKey>` header into the model so downstream SDKs
 * (e.g. `@google/genai`) send credentials via the standard HTTP Authorization
 * header instead of vendor-specific headers like `x-goog-api-key`.
 *
 * This is a no-op when `authHeader` is not `true`, when no API key is
 * available, or when the API key is a synthetic marker (e.g. local-server
 * placeholders) rather than a real credential.
 */
export function applyAuthHeaderOverride<T extends Model<Api>>(
  model: T,
  auth: ResolvedProviderAuth | null | undefined,
  cfg: OpenClawConfig | undefined,
): T {
  if (!auth?.apiKey) {
    return model;
  }
  // Reject synthetic marker values that are not real credentials.
  if (isNonSecretApiKeyMarker(auth.apiKey)) {
    return model;
  }
  const providerConfig = resolveProviderConfig(cfg, model.provider);
  if (!providerConfig?.authHeader) {
    return model;
  }

  // Strip any existing authorization header (case-insensitive) before
  // injecting the canonical one so we don't produce a comma-joined value.
  const headers: Record<string, string> = {};
  if (model.headers) {
    for (const [key, value] of Object.entries(model.headers)) {
      if (normalizeOptionalLowercaseString(key) !== "authorization") {
        headers[key] = value;
      }
    }
  }
  headers.Authorization = `Bearer ${auth.apiKey}`;

  return {
    ...model,
    headers,
  };
}
