#!/usr/bin/python
import signal
import sys
import os
import re

if len(sys.argv) < 2:
    print("Usage:\t{0} FILE...".format(sys.argv[0]))
    sys.exit(1)


def printError(file, type, line = -1):
    if line >= 0:
        print("{0} in {1}:{2}".format(type, file, line))
    else:
        print("{0} for {1}".format(type, file))

def checkFile(path):
    if os.path.isdir(path):
        checkDir(path)
    else:
        baseName = os.path.basename(path)
        if baseName.upper() == "AUTHORS":
            if baseName != "AUTHORS":
                printError(path, "Bad filename")
            checkAuthors(path)

        if baseName[len(baseName)-1] == '~' or baseName[len(baseName)-1] == '#'\
               or baseName[0] == '#':
            printError(path, "This is a temporary file")

        iExt = baseName.rfind('.')
        if iExt > 0:
            ext = baseName[iExt:]

            if ext == ".c":
                checkCFile(path)
            elif ext == ".h":
                checkHFile(path)
            elif ext == ".sh":
                checkSHFile(path)
            else:
                checkOtherFile(path)

def checkDir(path):
    dirList = os.listdir(path)
    filesList = []
    for f in dirList:
        basename = os.path.basename(f)
        if os.path.isdir(f):
            if basename == ".git" or basename == ".hg":
                printError(path, "There is a {0} repository".format(basename))
            else:
                if basename[0] == '.':
                    printError(path + '/' + basename, "Hidden directory")
                checkDir(path + '/' + f)
        else:
            if basename[0] == '.':
                printError(path + '/' + basename, "Hidden file")
            checkFile(path + '/' + f)

def checkCComment(path, line, num):
    txt = line.strip()
    if re.match("\*/", txt) is not None:
        if re.match("\*/$", txt) is None:
            printError(path, "Last big comment lines aren't empty", num)
        return 0
    elif re.match("\*/", txt) is not None and \
            re.match("/\*", txt) is None:
        printError(path, "\*/ ", num)
    elif re.match("^\*\* ", txt) is None:
        printError(path, "Bad intermediary comment lines", num)
    return 1
        
def checkCLang(path, line, num):
    txt = line.strip()
    if re.match("^#define", txt) is not None and \
            re.match("^#define +[A-Z0-9_]+[ (]?", txt) is None:
        printError(path, "Constant or macro without full uppercase", num)
    elif re.match("^ +#", line) is not None:
        printError(path, "The preprocessor directive mark not on the first column", num)
    elif re.match(".*sizeof[^ ].*", txt) is not None:
        printError(path, "Forgotten space after keyword", num)
    elif re.match("^# *(else|endif)", txt) is not None and \
        re.match("^# *(else|endif) +/", txt) is None:
        printError(path, "Preprocesor condition without comment describing the corresponding condition", num)
    elif re.match("^(typedef +)?struct", txt) is not None and \
        re.match("^(typedef +)?struct +s_", txt) is None:
        printError(path, "New struct without s_ name", num)
    elif re.match("^(typedef +)?union", txt) is not None and \
        re.match("^(typedef +)?union +u_", txt) is None:
        printError(path, "New union without u_ name", num)
    elif re.match("^(typedef +)?enum", txt) is not None and \
        re.match("^(typedef +)?enum +e_", txt) is None:
        printError(path, "New struct without s_ name", num)
    elif re.match("^typedef *(^(union|struct|enum))", txt) is not None and \
        re.match("^typedef +(unsigned )?[a-z_\*] +t_", txt) is None:
        printError(path, "New type without t_ name", num)
    elif re.match("^(if|else|elseif|for|while|do|typedef|struct|return|sizeof)", txt) is not None and \
        re.match("^(if|else|elseif|for|while|do|typedef|struct|return|sizeof)(uble| |$)", txt) is None:
        printError(path, "Forgotten space after keyword", num)
    elif re.match("^(if|else|elseif|for|while|do|typedef|struct)", txt) is not None and \
        re.match("^(if|else|elseif|for|while|do|typedef|struct).*\{", txt) is not None:
        printError(path, "{ on the same line of instruction", num)
    elif re.match("(^/\*|\*/$)", txt) is not None and \
        re.match("^(/\*|\*/)$", txt) is None:
        printError(path, "First and last big comment lines aren't empty", num)
    elif re.match("/\*$", txt) is not None:
        return 1
    elif re.match("^for", txt) is not None and \
        re.match("^for \(.*; .*; .*\)", txt) is None:
        printError(path, "Bad syntax for a for", num)
    elif re.match("^return", txt) is not None and \
        re.match("^return \(.*\)", txt) is None:
        printError(path, "Bad syntax for return", num)
    elif re.match(".*[^=]=.*;", txt) is not None and \
        re.match(".* [><]?[-&%+^*/!><|]?= .*", txt) is None:
        printError(path, "Bad syntax for an affectation", num)
    elif re.match("\r$", txt) is not None:
        printError(path, "DOS CR+LF line terminator detected", num)
    return 0

def checkHFile(path):
    checkCFile(path)

    num = 0
    with open(path, "r") as fp:
        lines = fp.read().split('\n')
#Search for Header protection
        for line in lines:
            num += 1
            line = line.replace("	", "        ")



def checkCFile(path):
    num = 0
    with open(path, "r") as fp:
        lines = fp.read().split('\n')
        typeBlock = 0
        for line in lines:
            num += 1
            line = line.replace("	", "        ")

            check80cols(path, line, num)
            checkTrailingWhitespace(path, line, num)
            if typeBlock == 1:
                typeBlock = checkCComment(path, line, num)
            else:
                typeBlock = checkCLang(path, line, num)

#Define some constants



i = 1
while i < len(sys.argv):
    checkFile(sys.argv[i])
    i += 1