import os
import sys
import rtconfig

if os.getenv('RTT_ROOT'):
    RTT_ROOT = os.getenv('RTT_ROOT')
else:
    RTT_ROOT = os.path.join(os.getcwd(), '..', '..', '..')

sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
from building import *

TARGET = 'rtthread.' + rtconfig.TARGET_EXT

DefaultEnvironment(tools=[])
env = Environment(tools = ['mingw'],
    AS   = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
    CC   = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,
    CXX  = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
    AR   = rtconfig.AR, ARFLAGS = '-rc',
    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
env['ASCOM'] = env['ASPPCOM']

Export('RTT_ROOT')
Export('rtconfig')

# prepare building environment
objs = PrepareBuilding(env, RTT_ROOT)

def _replace_cortex_r52_with_startup(objects):
    startup_dir = os.path.join(Dir('#').abspath, 'startup')
    startup_names = set(
        name for name in os.listdir(startup_dir)
        if os.path.isfile(os.path.join(startup_dir, name))
    )
    cpu_dir = os.path.abspath(os.path.join(RTT_ROOT, 'libcpu', rtconfig.ARCH, rtconfig.CPU))

    def _source_path(node):
        for attr in ('srcnode', 'rfile'):
            if hasattr(node, attr):
                source = getattr(node, attr)()
                if hasattr(source, 'abspath'):
                    return os.path.abspath(source.abspath)
        if hasattr(node, 'abspath'):
            return os.path.abspath(node.abspath)
        return None

    def _filter(items):
        filtered = []
        for item in items:
            if isinstance(item, list):
                filtered.append(_filter(item))
                continue

            if not hasattr(item, 'abspath'):
                filtered.append(item)
                continue

            item_path = _source_path(item)
            if item_path is None:
                filtered.append(item)
                continue

            item_name = os.path.basename(item_path)
            if item_name in startup_names and item_path.startswith(cpu_dir + os.sep):
                continue

            filtered.append(item)

        return filtered

    return _filter(objects)

objs = _replace_cortex_r52_with_startup(objs)

# make a building
DoBuilding(TARGET, objs)