import os
import platform
import re
from SCons.Script import *


def _git_cook(env: Environment, repo: dict) -> dict:
    checkout_root = repo['checkout_root']

    if os.path.exists(os.path.join(repo['checkout_root'], 'cmake', 'GetGitRevisionDescription.cmake')):
        try:
            recipe_folder = os.path.dirname(__file__)
            repo['repo'].git.apply('--unsafe-paths', '--directory', repo['checkout_root'], os.path.join(recipe_folder, 'fix_sdl3_from_worktree.patch'))
        except:
            # either already applied or not applicable anymore
            pass

    build_result = env.CMakeProject(project_root=checkout_root, generate_args = ['-DSDL_STATIC=ON', '-DSDL_SHARED=OFF'])
    libs = []
    if platform.system() == 'Windows':
        if env['BUILD_TYPE'] == 'debug':
            lib_names = ['SDL2-staticd', 'SDL3-static']
        else:
            lib_names = ['SDL2-static', 'SDL3-static']
        libs.extend(('kernel32', 'user32', 'gdi32', 'winmm', 'imm32', 'ole32', 'oleaut32', 'version', 'uuid', 'advapi32', 'setupapi', 'shell32', 'dinput8'))
    else:
        if env['BUILD_TYPE'] == 'debug':
            lib_names = ['SDL2d', 'SDL3']
        else:
            lib_names = ['SDL2', 'SDL3']
    lib_file = None
    is_sdl3 = False
    for lib_name in lib_names:
        lib_file = env.FindLib(lib_name, paths=build_result['LIBPATH'], allow_fail=True)
        if lib_file:
            is_sdl3 = "SDL3" in lib_name
            break
    if not lib_file:
        env.Error('Could not find SDL lib file.')
    libs.insert(0, lib_file)
    return {
        'CPPPATH': [os.path.join(build_result['install_dir'], (is_sdl3 and 'include' or 'include/SDL2'))], # SDL is really weird about include paths ...
        'LIBS': libs
    }


env.GitRecipe(
    globals = globals(),
    repo_name = 'SDL',
    repo_url = 'https://github.com/libsdl-org/SDL.git',
    tag_pattern = re.compile(r'^release-([0-9]+)\.([0-9]+)\.([0-9]+)$'),
    tag_fn = lambda version: f'release-{version[0]}.{version[1]}.{version[2]}',
    cook_fn = _git_cook
)