from evennia import default_cmds, create_object, search_tag
from evennia.utils import inherits_from
from evennia.utils.eveditor import EvEditor

from commands.command import Command
from typeclasses.exits import BaseDoor
from typeclasses.rooms import Room, Zone

def _descdoor_load(caller):
    return caller.db.evmenu_target.db.desc or ""


def _descdoor_save(caller, buf):
    """
    Save line buffer to the desc prop. This should
    return True if successful and also report its status to the user.
    """
    caller.db.evmenu_target.setdesc(buf)
    caller.msg("Saved.")
    return True


def _descdoor_quit(caller):
    caller.attributes.remove("evmenu_target")
    caller.msg("Exited editor.")

class CmdDescDoor(Command):
    """
    describe a BaseDoor in the current room.

    Usage:
      descdoor <obj> = <description>

    Switches:
      edit - Open up a line editor for more advanced editing.

    Sets the "desc" attribute on an object. If an object is not given,
    describe the current room.
    """

    key = "descdoor"
    aliases = ["descd"]
    switch_options = ("edit",)
    locks = "cmd:perm(descdoor) or perm(Builder)"
    help_category = "Building"

    def edit_handler(self):
        if self.rhs:
            self.msg("|rYou may specify a value, or use the edit switch, " "but not both.|n")
            return
        if self.args:
            obj = self.caller.search(self.args)
        else:
            obj = self.caller.location or self.msg("|rYou can't describe oblivion.|n")
        if not obj:
            return

        if not (obj.access(self.caller, "control") or obj.access(self.caller, "edit")):
            self.caller.msg("You don't have permission to edit the description of %s." % obj.key)

        self.caller.db.evmenu_target = obj
        # launch the editor
        EvEditor(
            self.caller,
            loadfunc=_descdoor_load,
            savefunc=_descdoor_save,
            quitfunc=_descdoor_quit,
            key="desc",
            persistent=True,
        )
        return

    def func(self):
        """Define command"""

        caller = self.caller
        if not self.args or ("=" in self.args and "edit" in self.switches):
            caller.msg("Usage: descdoor <obj> = <description>")
            return

        if "edit" in self.switches:
            self.edit_handler()
            return

        # We have an =
        obj = caller.search(self.lhs)
        if not obj:
            return
        desc = self.rhs or ""

        if inherits_from(obj, BaseDoor):
            if obj.access(self.caller, "control") or obj.access(self.caller, "edit"):
                obj.setdesc(desc)
                caller.msg("The description was set on %s." % obj.get_display_name(caller))
            else:
                caller.msg("You don't have permission to edit the description of %s." % obj.key)
        else:
            self.msg("|rYou can't describe oblivion.|n")


class CmdOpen(default_cmds.CmdOpen):
    __doc__ = default_cmds.CmdOpen.__doc__
    # overloading parts of the default CmdOpen command to support doors.

    def create_exit(self, exit_name, location, destination, exit_aliases=None, typeclass=None):
        """
        Simple wrapper for the default CmdOpen.create_exit
        """
        # create a new exit as normal
        new_exit = super().create_exit(
            exit_name, location, destination, exit_aliases=exit_aliases, typeclass=typeclass
        )
        if hasattr(self, "return_exit_already_created"):
            # we don't create a return exit if it was already created (because
            # we created a door)
            del self.return_exit_already_created
            return new_exit
        if inherits_from(new_exit, BaseDoor):
            # a door - create its counterpart and make sure to turn off the default
            # return-exit creation of CmdOpen
            self.caller.msg(
                "Note: A door-type exit was created - ignored eventual custom return-exit type."
            )
            self.return_exit_already_created = True
            back_exit = self.create_exit(
                exit_name, destination, location, exit_aliases=exit_aliases, typeclass=typeclass
            )
            new_exit.db.return_exit = back_exit
            back_exit.db.return_exit = new_exit
        return new_exit

class CmdUpdateLightState(Command):
    """
    update room light state.

    Usage:
      update_light [targetroom]
    """

    key = "update_light"
    aliases = ["up_l"]
    locks = "cmd:perm(update_light) or perm(Builder)"
    help_category = "Building"
    arg_regex = r"(?:^(?:\s+|\/).*$)|^$"

    def func(self):
        caller = self.caller
        if not self.args:
            target = caller.location
            if not target:
                caller.msg("You have no location to update!")
                return
        else:
            target = caller.search(self.args)
            if not (target.attributes.has("is_lit") and hasattr(target, "check_light_state")):
                caller.msg(
                    "You cannot update lights on {}!".format(target.key))
                return

        target.check_light_state()
        caller.msg("Performed update on {}!".format(target.key))

class CmdZone(Command):
    """
    creates, deletes or lists zones

    Usage:
      zone[/list||/del||/addroom] [zonename] [= room]

    Creates a new zone.

    """

    key = "zone"
    locks = "cmd:perm(zone) or perm(Builders)"
    help_category = "Building"

    def func(self):
        """
        Creates the zone.
        """

        caller = self.caller

        if "list" in self.switches:
            string = "";
            zones = search_tag(key="zone", category="general")
            for zone in zones:
                string +=  "|c{}|n ({})\n".format(zone.name, zone.dbref)
                rooms = search_tag(key=zone.name, category="zoneId")
                for room in rooms:
                    string += "- {} ({})\n".format(room.name, room.dbref)

            caller.msg("Zones found: \n" + string)
            return

        if not self.args:
            string = "Usage: zone[/list||/del||/addroom] [zonename] [= room]"
            caller.msg(string)
            return

        if "del" in self.switches:
            self.delete_zone(self.args)
        elif "addroom" in self.switches:
            self.add_room_to_zone(self.lhs, self.rhs)
        else:
            zone = create_object(Zone, key=self.args)
            caller.msg("Created zone |w{}|n.".format(zone.name))

    def delete_zone(self, zone_string):
        caller = self.caller
        zone = caller.search(zone_string, global_search=True, exact=True)
        if not zone:
            return
        if not inherits_from(zone, Zone):
            caller.msg("{} is not a valid zone.",format(zone.name))
            return

        key = zone.name
        zone.delete()
        caller.msg("Zone {} deleted.".format(key))

    def add_room_to_zone(self, zone_string, room_string):
        caller = self.caller
        zone = caller.search(zone_string, global_search=True, exact=True)
        if not zone:
            return
        if not inherits_from(zone, Zone):
            caller.msg("{} is not a valid zone.",format(zone.name))
            return

        room = caller.search(room_string, global_search=True)
        if not room:
            return
        if not inherits_from(room, Room):
            caller.msg("{} is not a valid room.",format(room.name))
            return

        zone.add_room(room)
        caller.msg("{} added to zone {}.".format(room.name, zone.name))

class CmdAddToZone(Command):
    """
    add a room to a zone

    Usage:
        @addtozone obj = zone

    Adds a room to an existing zone.
    """
    key = "@addtozone"
    locks = "cmd:perm(zone) or perm(Builders)"
    help_category = "Building"

    def func(self):
        """
        Adds a room to an existing zone.
        """

        caller = self.caller

        if self.rhs:
            # We have an =
            zone = caller.search(self.rhs, global_search=True, exact=True)
            if not zone:
                self.msg("Zone %s doesn't exist." % self.rhs)
                return
            if not utils.inherits_from(zone, Zone):
                self.msg("{r%s is not a valid zone.{n" % zone.name)
                return

            room = caller.search(self.lhs)
            if not room:
                self.msg("{rRoom %s doesn't exist.{n" % self.lhs)
                return
            if not utils.inherits_from(room, BaseRoom):
                self.msg("{r%s is not a valid room.{n" % room.name)
                return

            room.add_to_zone(zone.name)
            self.msg("Room %s (%s) added to zone %s (%s)." % (room.name, room.dbref, zone.name, zone.dbref))

        else:
            self.msg("{rUsage: @addtozone obj = zone{n")
            return