import { existsSync, readFileSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
function parseEnvLine(line) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#'))
        return null;
    const equalsIndex = trimmed.indexOf('=');
    if (equalsIndex === -1)
        return null;
    const key = trimmed.slice(0, equalsIndex).trim();
    let value = trimmed.slice(equalsIndex + 1).trim();
    if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(key))
        return null;
    if ((value.startsWith('"') && value.endsWith('"')) ||
        (value.startsWith("'") && value.endsWith("'"))) {
        value = value.slice(1, -1);
    }
    return { key, value };
}
function loadEnvFile(path) {
    if (!existsSync(path))
        return;
    const content = readFileSync(path, 'utf8');
    for (const line of content.split(/\r?\n/)) {
        const parsed = parseEnvLine(line);
        if (!parsed || process.env[parsed.key] !== undefined)
            continue;
        process.env[parsed.key] = parsed.value;
    }
}
export function loadEnv() {
    const moduleDir = dirname(fileURLToPath(import.meta.url));
    const candidatePaths = [
        resolve(process.cwd(), '.env'),
        resolve(process.cwd(), '..', '.env'),
        resolve(moduleDir, '..', '.env'),
        resolve(moduleDir, '..', '..', '.env')
    ];
    for (const path of [...new Set(candidatePaths)]) {
        loadEnvFile(path);
    }
}
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