# -*- coding: utf-8 -*-




import os
import sys
import time
from create_lambda_fun import search_lambda


'''

修改编译脚本之后需要全编译一次

'''


CC = 'gcc'
# CC = 'C:\\ARM_GCC\\bin\\arm-none-eabi-gcc'

# AS = CC + ' -x assembler-with-cpp'

# HEX = 'C:\\ARM_GCC\\bin\\arm-none-eabi-objcopy' + ' -O ihex'
# BIN = 'C:\\ARM_GCC\\bin\\arm-none-eabi-objcopy' + ' -O binary -S'

CSRC = ["main.c","test/lambda_test.c"]

CINC = ['-Isoft',"-Icpu", "-I./"]

CDEF = ["-DTEST","-DLINUX"]

ASRC = []

BUILD_DIR = 'build'

TARGET = 'hello'

# CFLAG = ["-Wall -pedantic -specs=nano.specs -mcpu=cortex-m3 -mthumb -lc -lm -lnosys -Og -Tstm32_boot.ld",
#          f"-Wl,-Map={BUILD_DIR}/{TARGET}.map,--cref -Wl,--gc-sections"]
# -pedantic 这一项是ISO语法检验
CFLAG = ["-Wall -g","-pthread"]


# 找到指定后缀的文件
def find_type(path:str,fix:list):
  dlist=os.listdir(path)
  file_list=[]
  for i in dlist:
    ps=os.path.join(path, i)
    if os.path.isdir(ps):
      file_list+=find_type(ps,fix)
    else:
      suf=ps.split('.')[-1]
      if(suf in fix):
        file_list.append(ps)
  return file_list



'''
将.c编译为.o文件，
编译脚本需要实现 如果.c文件有修改 则重新编译对应文件的.o文件
gcc -c test.c -o test.o

输出依赖关系到.d文件
gcc -MM main.c -o build/main.d





'''


def tran_path(path:str):
  p=path.replace('\\','/')
  p=p.replace('/','_')
  if(p[0]=='.'):
    return p[1:]
  else:
    return p


# 判断是否需要重新生成
def check_rebuild(dst:str,src:list):
  # print(f"src:{src}")
  if(not os.path.exists(dst)):
    return True
  dst_time=os.path.getmtime(dst)
  src_time=[]
  for i in src:
    src_time.append(os.path.getmtime(i))
  src_time.sort()
  if(src_time[-1]>dst_time):
    return True
  # for item in src_time:
  #   if(item>dst_time):
  #     return True
  return False



# 读取.d文件，返回依赖文件列表
def read_depend_files(name:str):
  with open(name) as f:
    lines=f.readlines()
    t=''
    for line in lines:
      line=line.strip()
      if(line[-1]=='\\'):
        t+=line[:-1]
      else:
        t+=line
    t=t.split(':')[-1].strip()
    t=t.split(' ')
    # print(f"依赖列表{t}")
    return t


# 生成依赖关系
def build_depend(src:list):
  flags=f"{' '.join(CINC)} {' '.join(CDEF)} {' '.join(CFLAG)}"
  for i in src:
    name=tran_path(i).split('.')[0]
    dst='.'.join([name,'d'])
    dst=os.path.join(BUILD_DIR,dst)
    if(check_rebuild(dst,[i])):
      cmd=f"{CC} -MM {i} -o {dst} {flags}"
      print(cmd)
      ret=os.system(cmd)
      if(ret):
        exit()
    else:
      # print(f"{i} 没有更新源文件")
      pass

# 生成中间文件
def build_object(src:list):
  flags=f"{' '.join(CINC)} {' '.join(CDEF)} {' '.join(CFLAG)}"
  for i in src:
    name_l=tran_path(i).split('.')
    name=name_l[0]
    file_type=name_l[-1]
    dst='.'.join([name,'o'])
    dst=os.path.join(BUILD_DIR,dst)
    cd='.'.join([name,'d'])
    cmd = ''
    if(file_type in ['c','.C']):
      cd=os.path.join(BUILD_DIR,cd)
      if(check_rebuild(dst,read_depend_files(cd))):
        cmd=f"{CC} -c {i} -o {dst} {flags}"
      else:
        # print(f"{i} 没有更新依赖关系")
        pass
    elif(file_type in ['s','S','asm','ASM']):
      if(check_rebuild(dst,[i])):
        # cmd=f"{AS} -c {i} -o {dst} {flags}"
        pass
      else:
        # print(f"{i} 没有更新依赖关系")
        pass
    if(len(cmd)>0):
      print(cmd)
      ret=os.system(cmd)
      if(ret):
        exit()


# 生成可执行文件
def build_target(src:list):
  flags=f"{' '.join(CINC)} {' '.join(CDEF)} {' '.join(CFLAG)}"
  obj_list=[]
  for i in src:
    name=tran_path(i).split('.')[0]
    obj_list.append(BUILD_DIR+'/'+'.'.join([name,'o']))
  dst=os.path.join(BUILD_DIR,TARGET)
  if(check_rebuild(dst,obj_list)):
    cmd=f"{CC} {' '.join(obj_list)} -o {dst} {flags}"
    print(cmd)
    ret=os.system(cmd)
    if(ret):
      exit()
  else:
    # print(f"{dst} 没有更新的链接文件")
    pass


def main():
  global CSRC
  global ASRC
  if(not os.path.exists(BUILD_DIR)):
    os.makedirs(BUILD_DIR)

  CSRC+=find_type('soft',['c','C'])
  CSRC+=find_type('cpu',['c','C'])
  CSRC=search_lambda(CSRC)
  # ASRC+=find_type('./',['s','S','asm','ASM'])


  build_depend(CSRC)
  build_object(CSRC)
  # build_object(ASRC)
  build_target(CSRC+ASRC)

if __name__ == "__main__":
    main()