'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');

const {
    isUnset,
    requireEnv,
    normalizeBetaFlag,
    loadConfig,
} = require('../config');

test('isUnset 對 undefined/null/空字串/字面 "null" 視為未設定', () => {
    assert.equal(isUnset(undefined), true);
    assert.equal(isUnset(null), true);
    assert.equal(isUnset(''), true);
    assert.equal(isUnset('null'), true);
});

test('isUnset 對其他非空值視為已設定', () => {
    assert.equal(isUnset('value'), false);
    assert.equal(isUnset('false'), false);
    assert.equal(isUnset('0'), false);
});

test('requireEnv 未設定時拋錯', () => {
    assert.throws(() => requireEnv('FOO', ''), /FOO 未設定/);
    assert.throws(() => requireEnv('FOO', undefined), /FOO 未設定/);
});

test('requireEnv 有值時回傳原值', () => {
    assert.equal(requireEnv('FOO', 'bar'), 'bar');
});

test('normalizeBetaFlag 僅 "true" 視為啟用', () => {
    assert.equal(normalizeBetaFlag('true'), true);
    assert.equal(normalizeBetaFlag('false'), false);
    assert.equal(normalizeBetaFlag(undefined), false);
    assert.equal(normalizeBetaFlag('TRUE'), false);
});

test('loadConfig 解析完整設定', () => {
    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 缺少 token 視為匿名（null）', () => {
    const config = loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo',
        GITEA_TOKEN: 'null',
    });

    assert.equal(config.token, null);
    assert.equal(config.isBeta, false);
});

test('loadConfig 缺少必填項目時拋錯', () => {
    assert.throws(() => loadConfig({ GITEA_REPOSITORY: 'owner/repo' }), /GITEA_SERVER_URL 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 格式錯誤或含路徑穿越時拋錯', () => {
    assert.throws(() => loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: '../evil',
    }), /GITEA_REPOSITORY 格式錯誤/);
    assert.throws(() => loadConfig({
        GITEA_SERVER_URL: 'https://gitea.example.com',
        GITEA_REPOSITORY: 'owner/repo/extra',
    }), /GITEA_REPOSITORY 格式錯誤/);
});

test('loadConfig 於 GITEA_REPOSITORY 邊界格式（空段/缺斜線/多段）皆拋錯', () => {
    for (const repo of ['noslash', 'owner/', '/repo', 'a/b/c', 'owner//repo']) {
        assert.throws(() => loadConfig({
            GITEA_SERVER_URL: 'https://gitea.example.com',
            GITEA_REPOSITORY: repo,
        }), /GITEA_REPOSITORY 格式錯誤/, `應拒絕：${repo}`);
    }
});

test('loadConfig 於 GITEA_REPOSITORY 含非法字元或超長段時拋錯', () => {
    const bad = [
        'ow ner/repo',
        'owner/re*po',
        'owner/re:po',
        `${'a'.repeat(101)}/repo`,
    ];
    for (const repo of bad) {
        assert.throws(() => loadConfig({
            GITEA_SERVER_URL: 'https://gitea.example.com',
            GITEA_REPOSITORY: repo,
        }), /GITEA_REPOSITORY 格式錯誤/, `應拒絕：${repo}`);
    }
});

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');
});