"""Exercise the POSIX entry point with a fake Python; no services or real venv."""
import os
from pathlib import Path
import shutil
import subprocess
import tempfile
import unittest


def shell_path(path):
    value = Path(path).as_posix()
    if len(value) > 1 and value[1] == ':':
        return '/' + value[0].lower() + value[2:]
    return value


class OfflineImportShellTests(unittest.TestCase):
    def setUp(self):
        self.shell = shutil.which('bash') or shutil.which('sh')
        if not self.shell and Path('C:/Program Files/Git/bin/bash.exe').is_file():
            self.shell = 'C:/Program Files/Git/bin/bash.exe'
        if not self.shell:
            self.skipTest('POSIX shell unavailable')
        self.tmp = tempfile.TemporaryDirectory()
        self.addCleanup(self.tmp.cleanup)
        self.root = Path(self.tmp.name)
        self.shell_cwd = subprocess.run([self.shell, '-c', 'pwd'], cwd=self.root,
                                        capture_output=True, text=True, check=True).stdout.strip()
        self.repo = self.root / 'repo with spaces'
        self.repo.mkdir()
        self.script = self.repo / 'deploy-offline.sh'
        self.script.write_bytes((Path(__file__).parents[2]/'deploy-offline.sh').read_bytes().replace(b'\r\n', b'\n'))
        self.capture = self.root/'arguments.txt'
        python = self.repo/'.venv/bin/python'
        python.parent.mkdir(parents=True)
        python.write_text('#!/bin/sh\nprintf "%s\\n" "$@" > "$CAPTURE"\n', encoding='utf-8', newline='\n')
        python.chmod(0o755)
        self.bin = self.root/'bin'
        self.bin.mkdir()
        uname = self.bin/'uname'
        uname.write_text('#!/bin/sh\nprintf "Linux\\n"\n', encoding='utf-8', newline='\n')
        uname.chmod(0o755)

    def run_shell(self, *args):
        env = dict(os.environ, CAPTURE=shell_path(self.capture))
        # An isolated PATH keeps this a syntax/argument test, including on Git Bash.
        return subprocess.run([self.shell, '-c', 'PATH="$1:/usr/bin:/bin"; export PATH; shift; exec /bin/sh "$@"',
                               'test', shell_path(self.bin), shell_path(self.script), *args], cwd=self.root,
                              env=env, capture_output=True, text=True)

    def test_default_custom_relative_absolute_and_library(self):
        for args, tail in [
            ([], ['import-knowledge']),
            (['a path/new.zip'], ['import-knowledge', self.shell_cwd+'/a path/new.zip']),
            (['/transfer/new.zip', 'article'], ['import-knowledge','/transfer/new.zip','article'])]:
            with self.subTest(args=args):
                result = self.run_shell('import-knowledge', *args)
                self.assertEqual(result.returncode,0,result.stderr)
                self.assertEqual(self.capture.read_text().splitlines(),['scripts/deploy.py',*tail])

    def test_invalid_arguments_rejected_before_python(self):
        for args in [('x.zip','wrong'), ('',), ('x.zip','article','extra')]:
            with self.subTest(args=args):
                result = self.run_shell('import-knowledge', *args)
                self.assertEqual(result.returncode,2)
                self.assertFalse(self.capture.exists())