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

tarfile = "installfile.tar.gz"
install_contents = ["bin", "lib"]
cleanup = ["*.o", "*.c", "*.h", "*.y", "*.l", "*.java", "adt", "libpm.a", "Makefile"]

def PerformCommand(command, information="", mode=None):
    print information
    if mode:
        return os.popen(command + " > /dev/null", mode)
    else:
        return os.popen(command + " > /dev/null")

def Build():
    stream = PerformCommand("uudecode -o " + tarfile, "Creating temporary packfile...", 'w')
    stream.write(source)
    stream.close()

    PerformCommand("tar -xzvf " + tarfile, "Decompressing...")
    PerformCommand("cp README bin/README", "...")

def Install():
    if not os.path.exists("Makefile"):
        print "Build has not been completed yet. Please run --build before calling --install."
        sys.exit()

    path = raw_input("Type in the path to install the build into: ")
    if not os.path.exists(path):
        decision = ""
        while 1:
            decision = raw_input("Directory doesn't exist. Do you want to create it now? (Y/N):")
            if decision[0].lower() == "y":
                PerformCommand("mkdir " + path, "Creating directory '" + path +"' ...")
                break
            elif decision[0].lower() == "n":
                print "Installation was cancelled."
                sys.exit()
    else:
        print "Ensuring write permissions for folder '" + path + "'..."
        os.chmod(path, 0777)

    PerformCommand("make", "Making build...")
    PerformCommand("cp -f README " + path + "/README", "...")
    for content in install_contents:
        PerformCommand("mv -f " + content + " " + path + "/" + content,
                "Moving '" + content + "' into '" + path + "/" + content + "'...")

    decision = ""
    while 1:
        decision = raw_input("Do you want to add the library export to your ~/.bashrc? (Y/N):")
        if decision[0].lower() == "y":
            stream = open(os.path.expanduser("~") + "/.bashrc", 'a')
            stream.write("# Added by dialogc install script\n")
            stream.write("export LD_LIBRARY_PATH=" + os.path.abspath(path + "/lib/") + ":${LD_LIBRARY_PATH}\n")
            stream.close()
            print "Added to the ~/.bashrc file."
            print "You'll need to restart your terminal after installation is done."
            break
        elif decision[0].lower() == "n":
            print "Omitted the ~/.bashrc insertion."
            print "Be sure to run this command manually, then:"
            print "\texport LD_LIBRARY_PATH=" + os.path.abspath(path + "/lib/") + ":${LD_LIBRARY_PATH}"
            break
    print "Performing cleanup..."
    for item in cleanup:
        PerformCommand("rm -rf " + item, "Removing " + item + "...")

def main():
    if len(sys.argv) >= 2:
        if sys.argv[1] == "--wip":
            print "WIP FILE! Installing..."
            print ""
            Build()
            print ""
            print "Done!"
        elif sys.argv[1] == "--install":
            print "Installing..."
            print ""
            Install()
            print ""
            print "Done!"
        elif sys.argv[1] == "--build":
            print "Building..."
            print ""
            Build()
            PerformCommand("rm " + tarfile, "Removing extractable...")
            print ""
            print "Done!"
        elif sys.argv[1] == "--help":
            print sys.argv[0]
            print ""
            print "  Commandline arguments:"
            print "       --install"
            print "            a release mode installation"
            print "            (only binaries and essential resources)"
            print "       --build"
            print "            compiles the code but leaves the source behind"
        else:
            print "Invalid command. Type " + sys.argv[0] + " --help for additional information"
    else:
        print "Performing full install..."
        print ""
        Build()
        PerformCommand("rm " + tarfile, "Removing extractable...")
        Install()
        print ""
        print "Done!"