import { UlwLoopError } from "./runtime.js";
import type { UlwLoopToolkitSurface } from "./surface.js";

export const ULW_LOOP_CREATE_GOALS_COMMAND = 'omo-agent-toolkit ulw-loop create-goals --brief "<brief>" --json';

export function createGoalsAction(surface: UlwLoopToolkitSurface): string {
	return surface === "omo-senpi" ? 'agentToolkit.createGoals({ brief: "<brief>" })' : ULW_LOOP_CREATE_GOALS_COMMAND;
}

export interface PlanMissingRecovery {
	readonly message: string;
	readonly details?: { readonly existingSessionIds: readonly string[] };
}

/**
 * A missing plan is either "never bootstrapped" or "bootstrapped under a different
 * session id"; the recovery text has to answer both without the caller guessing.
 */
export function planMissingRecovery(
	existingSessionIds: readonly string[],
	surface: UlwLoopToolkitSurface = "lazycodex",
): PlanMissingRecovery {
	const lines = [`Recovery: bootstrap the plan with \`${createGoalsAction(surface)}\`.`];
	if (existingSessionIds.length === 0) return { message: lines.join("\n") };
	lines.push(
		surface === "omo-senpi"
			? `Existing ulw-loop session ids under .omo/ulw-loop/: ${existingSessionIds.join(", ")}. The SDK is bound to the current session; resume the owning session to target its plan.`
			: `Existing ulw-loop session ids under .omo/ulw-loop/: ${existingSessionIds.join(", ")}. Re-run with \`--session-id <id>\` to target one of them.`,
	);
	return { message: lines.join("\n"), details: { existingSessionIds } };
}

export function planMissingError(
	planPath: string,
	existingSessionIds: readonly string[],
	surface: UlwLoopToolkitSurface = "lazycodex",
): UlwLoopError {
	const recovery = planMissingRecovery(existingSessionIds, surface);
	return new UlwLoopError(`No ulw-loop plan found at ${planPath}.\n${recovery.message}`, "ULW_LOOP_PLAN_MISSING", {
		...(recovery.details === undefined ? {} : { details: recovery.details }),
	});
}

export function sessionScopeRequiredMessage(flag: string, existingSessionIds: readonly string[]): string {
	const lines = [
		"No ulw-loop session scope: neither the session env (OMO_ULW_LOOP_SESSION_ID / CODEX_SESSION_ID / CODEX_THREAD_ID / PI_SESSION_ID) nor the flag names this run, and the shared .omo/ulw-loop root is never used implicitly because every session in this directory would read and overwrite it.",
		`Recovery: pass the scope explicitly: \`${flag} <id>\` (subprocess, eval, and hook contexts do not inherit the session env).`,
	];
	if (existingSessionIds.length > 0) {
		lines.push(`Existing ulw-loop session ids under .omo/ulw-loop/: ${existingSessionIds.join(", ")}.`);
	}
	return lines.join("\n");
}

export function sessionIdRequiredMessage(flag: string): string {
	return [
		`${flag} requires a non-empty value.`,
		"Recovery: subprocess, eval, and hook contexts do not inherit the ulw-loop session env (OMO_ULW_LOOP_SESSION_ID / CODEX_SESSION_ID / CODEX_THREAD_ID / PI_SESSION_ID),",
		`so pass the scope explicitly: \`${flag} <id>\` (for example \`${flag} 01a05b8a-6763-7780-834f-319423b071ce\`).`,
	].join("\n");
}