import subprocess
from pathlib import Path

import pytest

import tools.sync.wiki_git as wiki_git


@pytest.mark.parametrize('value', ['', '../master', '-main', 'a..b', 'a b', 'a.lock', 'a/@{x', 'a//b'])
def test_invalid_branch_configuration_is_rejected(monkeypatch, value):
    monkeypatch.setenv('EXPECTED_GITEA_BRANCH', value)
    with pytest.raises(RuntimeError, match='EXPECTED_GITEA_BRANCH'):
        wiki_git.expected_branch()


@pytest.mark.parametrize('url', ['git@git.kemt.fei.tuke.sk:jp170na/zpwiki.git',
    'ssh://git@git.kemt.fei.tuke.sk/jp170na/zpwiki.git', 'https://git.kemt.fei.tuke.sk/jp170na/zpwiki'])
def test_repository_identity_from_transport_url(url):
    assert wiki_git.repository_from_url(url) == 'jp170na/zpwiki'


def test_real_git_fetch_fast_forward_and_local_change_protection(tmp_path, monkeypatch):
    run = subprocess.run
    def git(root, *args):
        return run(['git', '-C', str(root), *args], capture_output=True, text=True, check=True).stdout.strip()
    bare, author, checkout = (tmp_path / name for name in ('remote.git', 'author', 'checkout'))
    run(['git', 'init', '--bare', str(bare)], check=True, capture_output=True)
    run(['git', 'clone', str(bare), str(author)], check=True, capture_output=True)
    git(author, 'checkout', '-b', 'master')
    git(author, 'config', 'user.name', 'Sync test')
    git(author, 'config', 'user.email', 'sync@example.test')
    (author / 'README.md').write_text('old')
    git(author, 'add', '.')
    git(author, 'commit', '-m', 'initial')
    git(author, 'push', 'origin', 'master')
    run(['git', 'clone', str(bare), str(checkout)], check=True, capture_output=True)
    git(checkout, 'remote', 'set-url', 'origin', 'git@example.test:KEMT/zpwiki.git')
    (author / 'README.md').write_text('new')
    git(author, 'commit', '-am', 'update')
    git(author, 'push', 'origin', 'master')
    wanted = git(author, 'rev-parse', 'HEAD')
    # Exercise real Git fetch/merge against a local bare remote. Only transport
    # is redirected, so the production origin/branch validation still runs.
    def local_transport(args, **kw):
        if args[:2] == ['git', 'fetch']:
            args = [str(bare) if arg == 'origin' else arg for arg in args]
        return run(args, **kw)
    monkeypatch.setattr(wiki_git.subprocess, 'run', local_transport)
    wiki_git.update_wiki(checkout)
    assert git(checkout, 'rev-parse', 'HEAD') == wanted
    assert (checkout / 'README.md').read_text() == 'new'
    (checkout / 'untracked.md').write_text('local notes')
    with pytest.raises(RuntimeError, match='lokálne zmeny'):
        wiki_git.update_wiki(checkout)
    (checkout / 'untracked.md').unlink()
    (checkout / 'README.md').write_text('local modification')
    with pytest.raises(RuntimeError, match='lokálne zmeny'):
        wiki_git.update_wiki(checkout)
    assert (checkout / 'README.md').read_text() == 'local modification'
    git(checkout, 'restore', 'README.md')
    monkeypatch.setenv('EXPECTED_GITEA_BRANCH', 'other')
    with pytest.raises(RuntimeError, match='Aktívna Git vetva'):
        wiki_git.update_wiki(checkout)
    monkeypatch.setenv('EXPECTED_GITEA_BRANCH', 'master')
    monkeypatch.setenv('EXPECTED_GITEA_REPOSITORY', 'OTHER/zpwiki')
    with pytest.raises(RuntimeError, match='origin nezodpovedá'):
        wiki_git.update_wiki(checkout)
    monkeypatch.setenv('EXPECTED_GITEA_REPOSITORY', 'KEMT/zpwiki')
    git(checkout, 'config', 'user.name', 'Local author')
    git(checkout, 'config', 'user.email', 'local@example.test')
    (checkout / 'local.md').write_text('local commit')
    git(checkout, 'add', 'local.md')
    git(checkout, 'commit', '-m', 'local')
    local_head = git(checkout, 'rev-parse', 'HEAD')
    (author / 'README.md').write_text('remote update')
    git(author, 'commit', '-am', 'remote')
    git(author, 'push', 'origin', 'master')
    with pytest.raises(RuntimeError, match='Git operácia merge zlyhala'):
        wiki_git.update_wiki(checkout)
    assert git(checkout, 'rev-parse', 'HEAD') == local_head
    assert (checkout / 'local.md').read_text() == 'local commit'