export interface QuietToolsConfig {
	enabled: boolean;
	maxChars: number;
	maxLines: number;
	headLines: number;
	tailLines: number;
	errorHeadLines: number;
	errorTailLines: number;
	artifactDir: string;
	indexFile: string;
	compactRead: boolean;
	compactBash: boolean;
	compactSubagent: boolean;
	readDefaultLimit: number;
}

export interface QuietToolsState {
	enabled: boolean;
	bypassNext: boolean;
}

function boolEnv(name: string, fallback: boolean): boolean {
	const value = process.env[name];
	if (value === undefined || value === "") return fallback;
	return ["1", "true", "yes", "on"].includes(value.toLowerCase());
}

function intEnv(name: string, fallback: number): number {
	const value = process.env[name];
	if (value === undefined || value === "") return fallback;
	const parsed = Number.parseInt(value, 10);
	return Number.isFinite(parsed) && parsed >= 0 ? parsed : fallback;
}

export function loadConfig(): QuietToolsConfig {
	return {
		enabled: boolEnv("QUIET_TOOLS_ENABLED", true),
		maxChars: intEnv("QUIET_TOOLS_MAX_CHARS", 12000),
		maxLines: intEnv("QUIET_TOOLS_MAX_LINES", 240),
		headLines: intEnv("QUIET_TOOLS_HEAD_LINES", 100),
		tailLines: intEnv("QUIET_TOOLS_TAIL_LINES", 60),
		errorHeadLines: intEnv("QUIET_TOOLS_ERROR_HEAD_LINES", 160),
		errorTailLines: intEnv("QUIET_TOOLS_ERROR_TAIL_LINES", 120),
		artifactDir: process.env.QUIET_TOOLS_ARTIFACT_DIR || ".pi/quiet-tools/outputs",
		indexFile: process.env.QUIET_TOOLS_INDEX || ".pi/quiet-tools/index.jsonl",
		compactRead: boolEnv("QUIET_TOOLS_COMPACT_READ", true),
		compactBash: boolEnv("QUIET_TOOLS_COMPACT_BASH", true),
		compactSubagent: boolEnv("QUIET_TOOLS_COMPACT_SUBAGENT", true),
		readDefaultLimit: intEnv("QUIET_TOOLS_READ_DEFAULT_LIMIT", 120),
	};
}