import os

const vexe = os.quoted_path(@VEXE)

fn test_help() {
    res := os.execute(vexe + ' help')
    assert res.exit_code == 0
    assert res.output.starts_with('V is a tool for managing V source code.')
}

fn test_help_as_short_option() {
    res := os.execute(vexe + ' -h')
    assert res.exit_code == 0
    assert res.output.starts_with('V is a tool for managing V source code.')
}

fn test_help_as_long_option() {
    res := os.execute(vexe + ' --help')
    assert res.exit_code == 0
    assert res.output.starts_with('V is a tool for managing V source code.')
}

fn test_run_help_text() {
    res := os.execute(vexe + ' help')
    assert res.exit_code == 0, res.output
    assert res.output.contains('executable if V created it for this run.')
    assert res.output.contains('Compile and run a V program, keeping the')
    assert res.output.contains('executable for reuse.')
}

fn test_run_topic_mentions_conditional_cleanup() {
    res := os.execute(vexe + ' help run')
    assert res.exit_code == 0, res.output
    assert res.output.contains('If `v run` created the executable for this run')
    assert res.output.contains('If the executable already existed before the command')
}

fn test_all_topics() {
    help_dir := os.join_path(@VEXEROOT, 'vlib', 'v', 'help')
    topic_paths := os.walk_ext(help_dir, '.txt')
    topics := topic_paths.map(os.file_name(it).replace('.txt', ''))
    for t in topics {
        res := os.execute(vexe + ' help ${t}')
        assert res.exit_code == 0, res.output
        assert res.output != ''
    }
}

fn test_unknown_topic() {
    res := os.execute(vexe + ' help abc')
    assert res.exit_code == 1, res.output
    assert res.output.starts_with('error: unknown help topic "abc".')
}

fn test_topics_output() {
    res := os.execute(vexe + ' help topics')
    assert res.exit_code == 0, res.output
    assert res.output != '', res.output
    assert !res.output.contains('default')
}

fn test_topic_sub_help() {
    res := os.execute(vexe + ' fmt --help')
    assert res.exit_code == 0, res.output
    assert res.output != ''
}

fn test_help_topic_with_cli_mod() {
    res := os.execute_or_exit(vexe + ' help init')
    assert res.output.contains('Usage: v init [flags]')
    assert res.output.contains('Sets up a V project within the current directory.')
    assert res.output.contains('Flags:')
    assert res.output.contains('--bin               Use the template for an executable application [default]')
    assert res.output.contains('--lib               Use the template for a library project.')
}