import discord

def register_all_commands(bot):
    bot.register_command("guilds", cmd_guilds)
    bot.register_command("listvc", cmd_listvc)
    bot.register_command("activevc", cmd_activevc)
    bot.register_command("vcinfo", cmd_vcinfo)

def cmd_guilds(bot, text, user, arg, argv):
    """
    Show all guilds
    """
    response = ""
    for guild in bot.discord.guilds:
        response += f"{guild.id}: {guild.name}<br />\n"

    user.send_text_message(response)

def cmd_listvc(bot, text, user, arg, argv):
    """
    Show voice channels in all guilds,
    or in a specific guild if the ID or name of guild has been given
    """
    if not argv:
        response = ""
        for guild in bot.discord.guilds:
            response += f"{guild.id}: {guild.name}<br />\n"
            for vc in guild.voice_channels:
                response += f">{vc.id}: {vc.name}<br />\n"
    else:
        guild = None
        try:
            guild = discord.utils.find(lambda g: g.id == int(argv[0]), bot.discord.guilds)
        except ValueError:
            pass
        if not guild:
            guild = discord.utils.find(lambda g: g.name == arg, bot.discord.guilds)
        if not guild:
            user.send_text_message("no guild found")
            return

        response = f"{guild.name}: <br />\n"
        for vc in guild.voice_channels:
            response += f">{vc.id}: {vc.name}<br />\n"

    user.send_text_message(response)

def cmd_activevc(bot, text, user, arg, argv):
    """
    Show all voice channels with users inside
    """
    if not argv:
        response = ""
        for guild in bot.discord.guilds:
            vcs_with_active_members = []
            for vc in guild.voice_channels:
                if len(vc.members) > 0:
                    vcs_with_active_members.append(vc)
            if len(vcs_with_active_members) > 0:
                response += f"{guild.id}: {guild.name}<br />\n"
                for vc in vcs_with_active_members:
                    response += f">{vc.id}: {vc.name} ({len(vc.members)})<br />\n"
                user.send_text_message(response)
            else:
                user.send_text_message("no active voice channels found")

def cmd_vcinfo(bot, text, user, arg, argv):
    try:
        if len(argv) >= 1:
            vc_id = int(argv[0])
        if len(argv) == 2:
            guild_id = int(argv[1])
    except TypeError:
        user.send_text_message("strings are not allowed: please use the ID and not the name")

    if len(argv) == 1:
        guild_id = None

    vc = get_vc(bot.discord, guild_id, vc_id)

    if not vc:
        user.send_text_message("no vc found")

    response = f"""Name: {vc.name}<br />\n
    Guild: {vc.guild.name}<br />\n
    Members: {len(vc.members)}<br />\n
    """

    if len(vc.members) > 0:
        response += "<br />\n"

    for member in vc.members:
        response += f"{member.name}<br />\n"

    user.send_text_message(response)

def get_vc(ctx, guild, identifier):
    """
    Try to get a Discord voice channel by ID
    ctx: discord.py context
    identifier: int: ID of the guild
    """
    if not guild:
        for g in ctx.guilds:
            vc = discord.utils.find(lambda vc: vc.id == identifier, g.voice_channels)
            if vc is not None:
                return vc
    else:
        g = discord.utils.find(lambda g: g.id == identifier, ctx.guilds)
        if not g:
            return None
        vc = discord.utils.find(lambda vc: vc.id == identifier, g.voice_channels)
        return vc