#!/usr/bin/env /usr/bin/python3.7
#
# pylint: disable=invalid-name

''' Simple tool to search and download remote configurations. '''


import fnmatch
import os
import os.path
import sys
import time
import urllib.error          # pylint: disable=no-name-in-module,F0401,E0611
import urllib.request        # pylint: disable=no-name-in-module,F0401,E0611

if 'XDG_CACHE_HOME' in os.environ:
    REMOTES_LIST_DIR = os.environ['XDG_CACHE_HOME']
else:
    REMOTES_LIST_DIR = os.path.expanduser('~/.cache')
REMOTES_LIST = os.path.join(REMOTES_LIST_DIR, 'remotes.list')

if 'LIRC_REMOTES_URL' in os.environ:
    REMOTE_CODEBASE = os.environ['LIRC_REMOTES_URL']
else:
    REMOTE_CODEBASE = \
        "https://sourceforge.net/p/lirc-remotes/code/ci/master/tree"

if 'LIRC_REMOTES_LIST' in os.environ:
    REMOTES_LIST_URL = os.environ['LIRC_REMOTES_LIST']
else:
    REMOTES_LIST_URL = "http://lirc-remotes.sourceforge.net/remotes.list"

USAGE = """
Usage:
    irdb-get update
    irdb-get find  <string>
    irdb-get info  <id>
    irdb-get find-driver <string>
    irdb-get download <id>
    irdb-get list [pattern]
    irdb-get yaml-config
    irdb-get <-h | --help | -v | --version>
"""


def here(path):
    ' Return path added to current dir for __file__. '
    return os.path.join(os.path.dirname(os.path.abspath(__file__)), path)


def download_file(url, path):
    ''' Download url to a file. '''
    if not os.path.exists(REMOTES_LIST_DIR):
        os.makedirs(REMOTES_LIST_DIR)
    try:
        urllib.request.urlretrieve(url, path)
    except urllib.error.HTTPError as ex:
        text = "Cannot download %s : %s" % (url, str(ex))
        print(text)


def get_list_lines():
    ''' Download remotes.list if required, return as list of lines. '''
    if not os.path.exists(REMOTES_LIST):
        download_file(REMOTES_LIST_URL, REMOTES_LIST)
    with open(REMOTES_LIST) as f:
        list_ = f.read()
    return [l for l in list_.split('\n') if l]


def do_download():
    ''' Download a file as given in sys.argv[2]. '''
    if len(sys.argv) < 3:
        print("No remote to download")
        print(USAGE)
        sys.exit(1)
    remote = sys.argv[2]
    uri = os.path.join(REMOTE_CODEBASE, 'remotes', remote)
    path = os.path.basename(remote)
    download_file(uri + '?format=raw', path)
    print("Downloaded %s as %s" % (uri, path))


def print_info(l):
    ''' Print some info for list line. '''
    tokens = l.split(';')
    uri = os.path.join(REMOTE_CODEBASE, 'remotes', tokens[0])
    print("Directory:        " + tokens[0])
    print("lircd.conf file:  " + tokens[1])
    print("lirmcd.conf file: " + tokens[2])
    print("Photo:            " + tokens[3])
    print("Name:             " + tokens[4])
    print("Timing info:      " + tokens[5])
    print("Raw:              " + tokens[6])
    print("URI:              " + uri)


def do_show():
    ''' Show info for id in sys.argv[2]. '''
    if len(sys.argv) < 3:
        print("No id string")
        print(USAGE)
        sys.exit(1)
    what = sys.argv[2]
    dir_, base = what.split("/")
    lines = get_list_lines()
    for l in lines:
        tokens = l.split(";")
        if tokens[0] == dir_ and tokens[1] == base:
            print_info(l)
            sys.exit(0)
    print("No line matching: " + what)
    sys.exit(1)


def do_list():
    ''' List files matching optional pattern in sys.argv[2]. '''
    if len(sys.argv) < 3:
        pattern = '*/*'
    elif len(sys.argv) == 3:
        pattern = sys.argv[2]
    else:
        print("Too many arguments")
        print(USAGE)
        sys.exit(1)
    lines = get_list_lines()
    for l in lines:
        tokens = l.split(';')
        if len(tokens) < 2:
            continue
        path = tokens[0] + "/" + tokens[1]
        if not fnmatch.fnmatch(path, pattern):
            continue
        lircmd = '-' if tokens[2].startswith('no') else 'L'
        photo = '-' if tokens[3].startswith('no') else 'P'
        timing = '-' if tokens[5].startswith('no') else 'T'
        raw = '-' if tokens[6].startswith('no') else 'R'
        print("%s%s%s%s %-32s %s" %
              (timing, raw, photo, lircmd, tokens[4], path))


def do_find_driver():
    ''' Find files having exactly the driver in sys.argv[2]. '''
    if len(sys.argv) < 3:
        print("No driver specified")
        print(USAGE)
        sys.exit(1)
    driver = sys.argv[2]
    lines = get_list_lines()
    found = []
    for l in lines:
        tokens = l.split(";")
        if tokens[7] == driver:
            found.append(l)
    for l in found:
        tokens = l.split(";")
        print(tokens[0] + "/" + tokens[1])


def print_yaml_dict(_dict):
    ''' Print a single-level dictionary as a yaml snippet. '''
    for key in sorted(_dict.keys()):
        print("\n    %s:" % key, end='')
        to_print = ["\n" + (8 * ' ') + '- ' + p
                    for p in sorted(list(set(_dict[key])))]
        print(" ".join(to_print))


def do_yaml_config():
    ''' Write a yaml file mappinng drivers to list of lircd.conf. '''

    if len(sys.argv) != 2:
        print("yaml-config: No arguments are allowed.")
        print(USAGE)
        sys.exit(1)
    lines = get_list_lines()
    lircd_by_driver = {}
    lircmd_by_driver = {}
    for l in lines:
        tokens = l.split(";")
        if len(tokens) < 8:
            continue
        driver = tokens[7]
        if (not driver) or driver == "no_driver" or driver == 'unknown':
            continue
        if driver not in lircd_by_driver:
            lircd_by_driver[driver] = []
        lircd_by_driver[driver].append("%s/%s" % (tokens[0], tokens[1]))
        if tokens[2] == 'no_lircmd':
            continue
        if driver not in lircmd_by_driver:
            lircmd_by_driver[driver] = []
        lircmd_by_driver[driver].append("%s/%s" % (tokens[0], tokens[2]))

    print("#")
    print("# Created by 'irdb-get yaml-config' at " + time.ctime())
    print("#")
    print("\nlircd_by_driver:")
    print_yaml_dict(lircd_by_driver)
    print("\nlircmd_by_driver:")
    print_yaml_dict(lircmd_by_driver)


def do_find():
    ''' Find files containing pattern in sys.argv[2]. '''
    if len(sys.argv) < 3:
        print("No search string")
        print(USAGE)
        sys.exit(1)
    what = sys.argv[2]
    lines = get_list_lines()
    found = []
    for l in lines:
        if what in l:
            found.append(l)
    for l in found:
        tokens = l.split(";")
        print(tokens[0] + "/" + tokens[1])


def do_update():
    ''' Download the directory from website. '''
    if os.path.exists(REMOTES_LIST):
        os.unlink(REMOTES_LIST)
    download_file(REMOTES_LIST_URL, REMOTES_LIST)


def main():
    ''' Indeed: main program. '''

    if len(sys.argv) < 2:
        print("No command given")
        print(USAGE)
        sys.exit(1)
    if sys.argv[1] == 'update':
        do_update()
    elif sys.argv[1] == 'download':
        do_download()
    elif sys.argv[1] == 'find':
        do_find()
    elif sys.argv[1] == 'find-driver':
        do_find_driver()
    elif sys.argv[1] == 'info':
        do_show()
    elif sys.argv[1] == 'list':
        do_list()
    elif sys.argv[1] == 'yaml-config':
        do_yaml_config()
    elif sys.argv[1] == '-h' or sys.argv[1] == '--help':
        print(USAGE)
    elif sys.argv[1] == '-v' or sys.argv[1] == '--version':
        print("irdb-get 0.10.1")
    else:
        print("Illegal command: " + sys.argv[1])
        print(USAGE)
        sys.exit(1)
    sys.exit(0)


if __name__ == '__main__':
    main()


# vim: set expandtab ts=4 sw=4:
