'use strict';

const { test } = require('node:test');
const assert = require('node:assert/strict');
const {
    isUnset,
    requireEnv,
    normalizeBetaFlag,
    loadConfig,
} = require('../config');

test('isUnset 對未設定值回傳 true', () => {
    assert.equal(isUnset(undefined), true);
    assert.equal(isUnset(null), true);
    assert.equal(isUnset(''), true);
    assert.equal(isUnset('null'), true);
});

test('isUnset 對有效值回傳 false', () => {
    assert.equal(isUnset('value'), false);
    assert.equal(isUnset('false'), false);
});

test('requireEnv 對未設定值丟出錯誤', () => {
    assert.throws(() => requireEnv('NAME', ''), /NAME 未設定/);
    assert.throws(() => requireEnv('NAME', 'null'), /NAME 未設定/);
});

test('requireEnv 對有效值回傳原值', () => {
    assert.equal(requireEnv('NAME', 'value'), 'value');
});

test('normalizeBetaFlag 僅將字面值 "true" 視為啟用', () => {
    assert.equal(normalizeBetaFlag('true'), true);
    assert.equal(normalizeBetaFlag('false'), false);
    assert.equal(normalizeBetaFlag('yes'), false);
    assert.equal(normalizeBetaFlag(undefined), false);
    assert.equal(normalizeBetaFlag('null'), false);
    assert.equal(normalizeBetaFlag('TRUE'), false);
});

test('loadConfig 從環境變數組出設定', () => {
    const config = loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo',
        GITEA_TOKEN: 'secret',
        IS_BETA: 'true',
    });
    assert.deepEqual(config, {
        serverUrl: 'https://gitea.example.com',
        repository: 'owner/repo',
        token: 'secret',
        isBeta: true,
    });
});

test('loadConfig 將未提供或字面 "null" 的 token 正規化為 null，beta 預設 false', () => {
    const omitted = loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo',
    });
    assert.equal(omitted.token, null);
    assert.equal(omitted.isBeta, false);

    const literalNull = loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo',
        GITEA_TOKEN: 'null',
    });
    assert.equal(literalNull.token, null);
});

test('loadConfig 在缺少必填環境變數時丟出錯誤', () => {
    assert.throws(() => loadConfig({ GITEA_REPOSITORY: 'owner/repo' }), /GITEA_SERVER_URL 未設定/);
    assert.throws(() => loadConfig({ GITEA_SERVER_URL: 'https://x' }), /GITEA_REPOSITORY 未設定/);
});

test('loadConfig 於 GITEA_SERVER_URL 非合法 URL 時拋錯', () => {
    assert.throws(() => loadConfig({
        GITEA_SERVER_URL: 'not-a-url',
        GITEA_REPOSITORY: 'owner/repo',
    }), /GITEA_SERVER_URL 格式錯誤/);
});

test('loadConfig 於 GITEA_SERVER_URL 使用非 http(s) 協定時拋錯', () => {
    assert.throws(() => loadConfig({
        GITEA_SERVER_URL: 'ftp://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo',
    }), /必須使用 http 或 https/);
});

test('loadConfig 於 GITEA_REPOSITORY 非 owner/repo 形式或含路徑穿越時拋錯', () => {
    const base = { GITEA_SERVER_URL: 'https://gitea.example.com' };
    assert.throws(() => loadConfig({ ...base, GITEA_REPOSITORY: 'no-slash' }), /GITEA_REPOSITORY 格式錯誤/);
    assert.throws(() => loadConfig({ ...base, GITEA_REPOSITORY: 'owner/repo/extra' }), /GITEA_REPOSITORY 格式錯誤/);
    assert.throws(() => loadConfig({ ...base, GITEA_REPOSITORY: '../owner/repo' }), /GITEA_REPOSITORY 格式錯誤/);
    assert.throws(() => loadConfig({ ...base, GITEA_REPOSITORY: 'owner/..' }), /GITEA_REPOSITORY 格式錯誤/);
});

test('loadConfig 接受含點號的合法 owner/repo', () => {
    const config = loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'my.org/my.repo',
    });
    assert.equal(config.repository, 'my.org/my.repo');
});