"""Shared install inventory and configurable POSIX directory layout."""
from pathlib import Path

KEYS = ('bindir', 'libdir', 'includedir', 'docdir', 'licensedir', 'examplesdir', 'desktopdir', 'pkgconfigdir')

def arguments(parser):
    parser.add_argument('--prefix', default='/usr/local')
    parser.add_argument('--destdir', default='')
    for key in KEYS:
        parser.add_argument('--' + key)


def layout(args):
    prefix = directory(args.prefix)
    defaults = dict(bindir=prefix / 'bin', libdir=prefix / 'lib', includedir=prefix / 'include',
                    docdir=prefix / 'share/doc/xtc', licensedir=prefix / 'share/licenses/xtc',
                    examplesdir=prefix / 'share/xtc/examples', desktopdir=prefix / 'share/applications',
                    pkgconfigdir=prefix / 'lib/pkgconfig')
    return {key: directory(getattr(args, key) or value) for key, value in defaults.items()}


def directory(value):
    text = str(value)
    path = Path(text)
    if not path.is_absolute() or '..' in path.parts or any(c in text for c in '\n\r\0"$\\'):
        raise ValueError('Install directories must be absolute without .., controls, quotes, $, or backslashes')
    return path


def inventory(source, paths):
    entries = [('libdir', 'libxtc.a', None), ('pkgconfigdir', 'xtc.pc', None),
               ('bindir', 'xtc-check', None), ('bindir', 'xtc', None),
               ('bindir', 'xtc-juce', None),
               ('desktopdir', 'xtc.desktop', source / 'packaging/xtc.desktop'),
               ('licensedir', 'LICENSE', source / 'LICENSE'),
               ('licensedir', 'CLAP-LICENSE', source / 'third_party/clap/LICENSE'),
               ('licensedir', 'VST3-C-API-LICENSE', source / 'third_party/vst3/LICENSE.txt'),
               ('docdir', 'README.md', source / 'README.md'),
               ('docdir', 'BINARY_MANIFEST.json', None)]
    entries += [('includedir', 'xtc/' + p.name, p) for p in sorted((source / 'include/xtc').glob('*.h'))]
    entries += [('docdir', p.name, p) for p in sorted((source / 'docs').glob('*.md'))]
    entries += [('docdir', p.name, p) for p in sorted((source / 'docs').glob('*performance*.json'))]
    entries += [('docdir', 'decisions/' + p.name, p) for p in sorted((source / 'docs/decisions').glob('*.md'))]
    entries += [('examplesdir', p.name, p) for p in sorted((source / 'examples/projects').glob('*')) if p.is_file()]
    result = [(paths[key] / name, original) for key, name, original in entries]
    if len({path for path, _ in result}) != len(result):
        raise ValueError('Install layout has overlapping file destinations')
    return result


def staged(path, destdir):
    if not destdir:
        return path
    root = directory(destdir).resolve()
    result = root / path.relative_to('/')
    if not result.parent.resolve().is_relative_to(root):
        raise ValueError(f'Install directory symlink escapes DESTDIR: {result}')
    return result