# -*- coding: utf-8 -*-
# Copyright (c) 2020-2022 Salvador E. Tropea
# Copyright (c) 2020-2022 Instituto Nacional de Tecnología Industrial
# License: GPL-3.0
# Project: KiBot (formerly KiPlot)
from collections import OrderedDict
from .optionable import Optionable
from .error import KiPlotConfigurationError
from .misc import ToolDependency, ToolDependencyRole


class Registrable(object):
    """ This class adds the mechanism to register plug-ins """
    def __init__(self):
        super().__init__()

    @classmethod
    def register(cl, name, aclass):
        cl._registered[name] = aclass

    @classmethod
    def is_registered(cl, name):
        return name in cl._registered

    @classmethod
    def get_class_for(cl, name):
        return cl._registered[name]

    @classmethod
    def get_registered(cl):
        return cl._registered

    def __str__(self):
        return "'{}' ({}) [{}]".format(self.comment, self.name, self.type)


class RegOutput(Optionable, Registrable):
    """ An optionable that is also registrable.
        Used by BaseOutput.
        Here because it doesn't need macros. """
    _registered = {}
    # List of defined filters
    _def_filters = {}
    # List of defined variants
    _def_variants = {}
    # List of defined outputs
    _def_outputs = OrderedDict()

    def __init__(self):
        super().__init__()

    @staticmethod
    def reset():
        # List of defined filters
        RegOutput._def_filters = {}
        # List of defined variants
        RegOutput._def_variants = {}
        # List of defined outputs
        RegOutput._def_outputs = OrderedDict()

    @staticmethod
    def add_variants(variants):
        RegOutput._def_variants.update(variants)

    @staticmethod
    def is_variant(name):
        return name in RegOutput._def_variants

    @staticmethod
    def get_variant(name):
        return RegOutput._def_variants[name]

    @staticmethod
    def add_filters(filters):
        RegOutput._def_filters.update(filters)

    @staticmethod
    def is_filter(name):
        return name in RegOutput._def_filters

    @staticmethod
    def get_filter(name):
        return RegOutput._def_filters[name]

    @staticmethod
    def add_filter(obj):
        RegOutput._def_filters[obj.name] = obj

    @staticmethod
    def add_output(obj, file=None):
        if obj.name in RegOutput._def_outputs:
            msg = "Output name `{}` already defined".format(obj.name)
            if file:
                msg += ", while importing from `{}`".format(file)
            raise KiPlotConfigurationError(msg)
        RegOutput._def_outputs[obj.name] = obj

    @staticmethod
    def add_outputs(objs, file=None):
        for o in objs:
            RegOutput.add_output(o, file)

    @staticmethod
    def get_outputs():
        return RegOutput._def_outputs.values()

    @staticmethod
    def get_output(name):
        return RegOutput._def_outputs.get(name, None)

    @staticmethod
    def check_variant(variant):
        if variant:
            if not RegOutput.is_variant(variant):
                raise KiPlotConfigurationError("Unknown variant name `{}`".format(variant))
            return RegOutput.get_variant(variant)
        return None


class RegVariant(Optionable, Registrable):
    """ An optionable that is also registrable.
        Used by BaseVariant.
        Here because it doesn't need macros. """
    _registered = {}

    def __init__(self):
        super().__init__()


class RegFilter(Optionable, Registrable):
    """ An optionable that is also registrable.
        Used by BaseFilter.
        Here because it doesn't need macros. """
    _registered = {}

    def __init__(self):
        super().__init__()


class RegDependency(Registrable):
    """ Used to register output tools dependencies """
    _registered = {}

    def __init__(self):
        super().__init__()

    @classmethod
    def register(cl, aclass):
        name = aclass.name
        if name in cl._registered:
            # Already registered, add the roles
            old_reg = cl._registered[name]
            old_reg.roles.extend(aclass.roles)
        else:
            cl._registered[name] = aclass


# Here we register some global dependencies
RegDependency.register(ToolDependency('global', 'Colorama', is_python=True,
                       roles=ToolDependencyRole(desc='get color messages in a portable way')))
RegDependency.register(ToolDependency('global', 'Distutils', is_python=True))
RegDependency.register(ToolDependency('global', 'Requests', is_python=True))
RegDependency.register(ToolDependency('global', 'PyYAML', is_python=True, deb='python3-yaml', module_name='yaml'))