import re
from SCons.Script import *

_REPO_NAMES = {
    'default': 'glm',
    'mewin': 'glm_mewin'
}
_REPO_URLS = {
    'default': 'https://github.com/g-truc/glm.git',
    'mewin': 'https://git.mewin.de/mewin/glm.git'
}
_TAG_PATTERN = re.compile(r'^([0-9]+)\.([0-9]+)\.([0-9]+)$')
_TAG_PATTERN_ALT = re.compile(r'^0\.([0-9]+)\.([0-9]+)\.([0-9]+)$')

def _get_repo_name(env: Environment) -> str:
    return _REPO_NAMES[env.get('GLM_REMOTE', 'default')]

def _get_repo_url(env: Environment) -> str:
    return _REPO_URLS[env.get('GLM_REMOTE', 'default')]

def versions(env: Environment, update: bool = False):
    if env.get('GLM_REMOTE') == 'mewin':
        return [(0, 0, 0)]

    tags = env.GitTags(repo_name = _get_repo_name(env), remote_url = _get_repo_url(env), force_fetch=update)
    result = []
    for tag in tags:
        match = _TAG_PATTERN.match(tag)
        if match:
            result.append((int(match.groups()[0]), int(match.groups()[1]), int(match.groups()[2])))
        else:
            match = _TAG_PATTERN_ALT.match(tag)
            if match:
                result.append((0, int(match.groups()[0]), int(match.groups()[1]) * 10 + int(match.groups()[2])))
    return result

def dependencies(env: Environment, version) -> 'dict':
    return {}

def cook(env: Environment, version) -> dict:
    if env.get('GLM_REMOTE') == 'mewin':
      git_ref = 'master'
    elif version[0] == 0:
        git_ref = f'refs/tags/0.{version[1]}.{int(version[2]/10)}.{version[2]%10}'
    else:
        git_ref = f'refs/tags/{version[0]}.{version[1]}.{version[2]}'
    repo = env.GitBranch(repo_name = _get_repo_name(env), remote_url = _get_repo_url(env), git_ref = git_ref)
    checkout_root = repo['checkout_root']
    return {
        'CPPPATH': [checkout_root],
    }