/**
 * Subprocess-only harness submit tools — validate + write artifacts under run_dir.
 * Prefer harness-subagent-governance.ts bundle (AGT + submit) for harness spawns.
 */

import { join } from "node:path";
import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
import { claimHarnessGovernanceLoad } from "../lib/extension-load-guard.js";
import { evaluateAgtHarnessToolCall } from "../lib/harness-agt-tool-guard.js";
import { getHarnessPackageRoot } from "../lib/harness-paths.js";
import {
	isSubprocessHarnessSubmit,
	registerHarnessSubagentSubmitTools,
	resolveHarnessSubmitRunContext,
} from "../lib/harness-subagent-submit-register.js";

// @ts-expect-error pi extensions run as ESM
const MODULE_URL = import.meta.url;

export default function harnessSubagentSubmit(pi: ExtensionAPI) {
	if (!claimHarnessGovernanceLoad("harness-subagent-submit", MODULE_URL))
		return;
	if (process.env.PI_HARNESS_SUBPROCESS !== "1") {
		return;
	}

	const packageRoot = getHarnessPackageRoot(MODULE_URL);
	registerHarnessSubagentSubmitTools(pi, packageRoot);

	pi.on("tool_call", async (event, ctx) => {
		if (!event.toolName.startsWith("submit_")) return undefined;
		if (!isSubprocessHarnessSubmit()) {
			return {
				block: true,
				reason:
					"harness-subagent-submit: submit_* tools are only available in harness subagent subprocesses.",
			};
		}
		const { agentId } = resolveHarnessSubmitRunContext(packageRoot);
		if (!agentId) {
			return {
				block: true,
				reason:
					"harness-subagent-submit: HARNESS_AGENT_ID is required for submit tools.",
			};
		}

		return evaluateAgtHarnessToolCall({
			moduleUrl: MODULE_URL,
			toolName: event.toolName,
			toolInput: event.input as Record<string, unknown>,
			policyState: {
				phase:
					(process.env.HARNESS_SUBAGENT_PHASE_HINT as
						| "plan"
						| "execute"
						| "evaluate"
						| "adversary"
						| "merge") ?? "plan",
				approvedPlan: true,
				planId: null,
				aborted: false,
				budgetBypass: false,
			},
			entries: ctx.sessionManager.getEntries(),
			sessionId: ctx.sessionManager.getSessionId(),
			projectRoot: ctx.cwd,
		});
	});
}

/** Absolute path to the subprocess submit extension (legacy standalone). */
export function harnessSubagentSubmitExtensionPath(
	packageRoot: string,
): string {
	return join(packageRoot, ".pi", "extensions", "harness-subagent-submit.ts");
}