#!/usr/bin/env python3
import os
import gzip
import argparse
import subprocess

parser = argparse.ArgumentParser()
parser.add_argument('-o', '--output', help='Output file name', default='stdout')
parser.add_argument('-W', '--webroot', help='Output file name', default='webdir/')
parser.add_argument('--gzip', dest='gzip', action='store_true')
parser.add_argument('--no-gzip', dest='gzip', action='store_false')
parser.set_defaults(gzip=False)
parser.add_argument('--minify', dest='minify', action='store_true')
parser.add_argument('--no-minify', dest='minify', action='store_false')
parser.set_defaults(minify=False)
parser.add_argument('--header', dest='header', action='store_true')
parser.add_argument('--no-header', dest='header', action='store_false')
parser.set_defaults(header=True)
parser.add_argument('input', nargs='+', default=os.getcwd())
args = parser.parse_args()


def mimeFromName(name):
    if name.endswith(".html") or name.endswith(".htm") or name.endswith(".shtml") or name.endswith(
            ".shtm") or name.endswith(".ssi"):
        return "text/html"
    if name.endswith(".js"):
        return "application/x-javascript"
    if name.endswith(".css"):
        return "text/css"
    if name.endswith(".ico"):
        return "image/x-icon"
    if name.endswith(".gif"):
        return "image/gif"
    if name.endswith(".png"):
        return "image/png"
    if name.endswith(".jpg"):
        return "image/jpeg"
    if name.endswith(".bmp"):
        return "image/bmp"
    if name.endswith(".class"):
        return "application/octet-stream"
    if name.endswith(".ram"):
        return "audio/x-pn-realaudio"
    return "text/plain"


def dumpBin2CHex(f, b):
    oStr = "\t"
    n = 0
    for val in b:
        oStr += hex(val) + ", "
        n += 1
        if n % 8 == 0:
            oStr += "\n\t"
    oStr += "\n"
    f.write(oStr)


f_fsdata_c = open(args.output, 'w')
f_fsdata_c.write('#include "httpd/fsdata.h"\n\n')

httpFiles = [file for file in args.input if (args.webroot in file)]

lastFileStruct = "NULL"

for file in httpFiles:
    response = b''

    webPath = ("/" + file.removeprefix(args.webroot)).replace("//", "/")
    print("{} > {}".format(file, webPath))

    mimeType = mimeFromName(file)

    if args.header:
        if ("404" in file):
            response = b'HTTP/1.0 404 File not found\r\n'
        else:
            response = b'HTTP/1.0 200 OK\r\n'
        response += b"lwIP/1.4.1 (http://savannah.nongnu.org/projects/lwip)\r\n"
        response += b'Content-type: ' + mimeType.encode() + b'\r\n'

        binFile = open(file, 'rb')
        binData = binFile.read()
        compEff = False
        if args.minify:
            p = subprocess.Popen(["minify", "--html-keep-document-tags", "--mime", mimeType], stdin=subprocess.PIPE,
                                 stdout=subprocess.PIPE)
            minData = p.communicate(binData)[0]
            if len(minData) < len(binData):
                print("- Minify: {} -> {}".format(len(binData), len(minData)))
                compEff = True
                binData = minData

        if args.gzip:
            compData = gzip.compress(binData, 9)
            if len(compData) < len(binData):
                compEff = True
                print("- Compressed from {} to {}".format(len(binData), len(compData)))
                binData = compData
            else:
                print("- Compression skipped Orig: {} Comp: {}".format(len(binData), len(compData)))
        binFile.close()

        if compEff:
            response += b'Content-Encoding: gzip\r\n'
        response += b"\r\n"
        response += binData
        binFile.close()
        escFile = file.replace("/", "_").replace(".", "_")
        escFileData = "data_" + escFile
        escFileFile = "file_" + escFile

        f_fsdata_c.write('static const unsigned char {}[] = {{\n'.format(escFileData))
        f_fsdata_c.write('\t/* LOCAL:{} */\n'.format(file))
        f_fsdata_c.write('\t/* WEB:  {} */\n'.format(webPath))
        fnameBin = webPath.encode("ascii") + b'\0'
        dumpBin2CHex(f_fsdata_c, fnameBin)
        dumpBin2CHex(f_fsdata_c, response)
        f_fsdata_c.write("};\n\n")

        f_fsdata_c.write("const struct fsdata_file {}[] = {{{{\n  {},\n  {}, {} + {}, sizeof({}) - {}, 1 }}}};\n\n"
                         .format(escFileFile, lastFileStruct, escFileData, escFileData, len(fnameBin), escFileData,
                                 len(fnameBin)))
        # TODO: The last value is 1 if args.header == True
        lastFileStruct = escFileFile

f_fsdata_c.write("\n")
f_fsdata_c.write("#define FS_ROOT {}\n\n".format(lastFileStruct))
f_fsdata_c.write("#define FS_NUMFILES {}\n\n".format(len(httpFiles)))