/**
 * @module plugin-github
 * @description elizaOS plugin for GitHub integration.
 *
 * Actions:
 *   - GITHUB (PR, issue, and notification operations)
 *
 * Auth: role-tagged account records with legacy PAT fallback.
 *   - GITHUB_ACCOUNTS   — JSON account records ({accountId, role, token})
 *   - GITHUB_USER_PAT   — legacy user acting on their own behalf
 *   - GITHUB_AGENT_PAT  — legacy agent acting on its own behalf
 *   E2E fallbacks: ELIZA_E2E_GITHUB_USER_PAT / ELIZA_E2E_GITHUB_AGENT_PAT.
 *
 * Each action takes an `as: "user" | "agent"` option and may take accountId
 * to select a specific account. GITHUB_PR_OP review and
 * GITHUB_NOTIFICATION_TRIAGE default to `"user"`; the other ops default to
 * `"agent"`.
 */

import type http from "node:http";
import type { IAgentRuntime, Plugin, Route } from "@elizaos/core";
import {
  getConnectorAccountManager,
  logger,
  promoteSubactionsToActions,
} from "@elizaos/core";
import { githubAction } from "./actions/github.js";
import { createGitHubConnectorAccountProvider } from "./connector-account-provider.js";
import { handleGitHubRoutes } from "./routes/github-routes.js";
import { registerGitHubSearchCategory } from "./search-category.js";
import { GitHubService } from "./services/github-service.js";

/**
 * Remove the GitHub token from the live runtime's per-agent settings.
 * `runtime.setSetting` has no delete form (null values are ignored by
 * design), so disconnect clears the two per-agent records `getSetting`
 * consults: `character.secrets` and `character.settings.secrets`.
 */
function clearRuntimeGitHubToken(runtime: IAgentRuntime): void {
  const secrets = runtime.character.secrets;
  if (secrets && "GITHUB_TOKEN" in secrets) {
    delete secrets.GITHUB_TOKEN;
  }
  const settings = runtime.character.settings;
  const nestedSecrets =
    settings &&
    typeof settings === "object" &&
    "secrets" in settings &&
    typeof settings.secrets === "object" &&
    settings.secrets !== null
      ? (settings.secrets as Record<string, unknown>)
      : undefined;
  if (nestedSecrets && "GITHUB_TOKEN" in nestedSecrets) {
    delete nestedSecrets.GITHUB_TOKEN;
  }
}

function createGitHubRouteHandler(method: "GET" | "POST" | "DELETE") {
  return async (
    req: unknown,
    res: unknown,
    runtime: unknown,
  ): Promise<void> => {
    const httpReq = req as http.IncomingMessage;
    const httpRes = res as http.ServerResponse;
    const url = new URL(httpReq.url ?? "/api/github/token", "http://localhost");
    const agentRuntime = runtime as IAgentRuntime;
    await handleGitHubRoutes({
      req: httpReq,
      res: httpRes,
      method,
      pathname: url.pathname,
      // Device flows are scoped to the agent that started them.
      agentKey: String(agentRuntime.agentId),
      getOauthClientId: () => {
        const clientId = agentRuntime.getSetting("GITHUB_OAUTH_CLIENT_ID");
        return typeof clientId === "string" ? clientId : undefined;
      },
      // Per-agent settings (character.secrets), NOT process.env — env would
      // leak the token to every agent on a multi-tenant host. The on-disk
      // credential record still re-applies at next boot via
      // `applySavedTokenToEnv` for gh/git subprocess inheritance.
      applyRuntimeToken: (token) =>
        agentRuntime.setSetting("GITHUB_TOKEN", token, true),
      clearRuntimeToken: () => clearRuntimeGitHubToken(agentRuntime),
    });
  };
}

export * from "./accounts.js";
export { githubAction } from "./actions/github.js";
export { issueOpAction } from "./actions/issue-op.js";
export {
  notificationTriageAction,
  scoreNotification,
  type TriagedNotification,
} from "./actions/notification-triage.js";
export { prOpAction } from "./actions/pr-op.js";
export { createGitHubConnectorAccountProvider } from "./connector-account-provider.js";
export { GitHubService } from "./services/github-service.js";
export * from "./types.js";

const githubRoutes: Route[] = [
  {
    type: "GET",
    path: "/api/github/token",
    rawPath: true,
    handler: createGitHubRouteHandler("GET"),
  },
  {
    type: "POST",
    path: "/api/github/token",
    rawPath: true,
    handler: createGitHubRouteHandler("POST"),
  },
  {
    type: "DELETE",
    path: "/api/github/token",
    rawPath: true,
    handler: createGitHubRouteHandler("DELETE"),
  },
  {
    type: "POST",
    path: "/api/github/device/start",
    rawPath: true,
    handler: createGitHubRouteHandler("POST"),
  },
  {
    type: "POST",
    path: "/api/github/device/poll",
    rawPath: true,
    handler: createGitHubRouteHandler("POST"),
  },
];

export const githubPlugin: Plugin = {
  name: "github",
  description:
    "GitHub integration for pull requests, issues, and notification triage",
  services: [GitHubService],
  actions: [...promoteSubactionsToActions(githubAction)],
  routes: githubRoutes,
  init: async (_config: Record<string, string>, runtime: IAgentRuntime) => {
    registerGitHubSearchCategory(runtime);
    try {
      const manager = getConnectorAccountManager(runtime);
      manager.registerProvider(createGitHubConnectorAccountProvider(runtime));
    } catch (err) {
      logger.warn(
        {
          src: "plugin:github",
          err: err instanceof Error ? err.message : String(err),
        },
        "Failed to register GitHub provider with ConnectorAccountManager",
      );
    }
  },
  async dispose(runtime: IAgentRuntime) {
    const svc = runtime.getService<GitHubService>(GitHubService.serviceType);
    await svc?.stop();
  },
};

export default githubPlugin;