# Copyright (c) 2024, Alexei Znamensky <russoz@gmail.com>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import annotations

from functools import wraps

from ansible.module_utils.common.collections import is_sequence


def _ensure_list(value):
    return list(value) if is_sequence(value) else [value]


class _ArgFormat(object):
    def __init__(self, func, ignore_none=True, ignore_missing_value=False):
        self.func = func
        self.ignore_none = ignore_none
        self.ignore_missing_value = ignore_missing_value

    def __call__(self, value):
        ignore_none = self.ignore_none if self.ignore_none is not None else True
        if value is None and ignore_none:
            return []
        f = self.func
        return [str(x) for x in f(value)]

    def __str__(self):
        return f"<ArgFormat: func={self.func}, ignore_none={self.ignore_none}, ignore_missing_value={self.ignore_missing_value}>"

    def __repr__(self):
        return str(self)


def as_bool(args_true, args_false=None, ignore_none=None):
    if args_false is not None:
        if ignore_none is None:
            ignore_none = False
    else:
        args_false = []
    return _ArgFormat(lambda value: _ensure_list(args_true) if value else _ensure_list(args_false), ignore_none=ignore_none)


def as_bool_not(args):
    return as_bool([], args, ignore_none=False)


def as_optval(arg, ignore_none=None):
    return _ArgFormat(lambda value: [f"{arg}{value}"], ignore_none=ignore_none)


def as_opt_val(arg, ignore_none=None):
    return _ArgFormat(lambda value: [arg, value], ignore_none=ignore_none)


def as_opt_eq_val(arg, ignore_none=None):
    return _ArgFormat(lambda value: [f"{arg}={value}"], ignore_none=ignore_none)


def as_list(ignore_none=None, min_len=0, max_len=None):
    def func(value):
        value = _ensure_list(value)
        if len(value) < min_len:
            raise ValueError(f"Parameter must have at least {min_len} element(s)")
        if max_len is not None and len(value) > max_len:
            raise ValueError(f"Parameter must have at most {max_len} element(s)")
        return value
    return _ArgFormat(func, ignore_none=ignore_none)


def as_fixed(*args):
    if len(args) == 1 and is_sequence(args[0]):
        args = args[0]
    return _ArgFormat(lambda value: _ensure_list(args), ignore_none=False, ignore_missing_value=True)


def as_func(func, ignore_none=None):
    return _ArgFormat(func, ignore_none=ignore_none)


def as_map(_map, default=None, ignore_none=None):
    if default is None:
        default = []
    return _ArgFormat(lambda value: _ensure_list(_map.get(value, default)), ignore_none=ignore_none)


def unpack_args(func):
    @wraps(func)
    def wrapper(v):
        return func(*v)
    return wrapper


def unpack_kwargs(func):
    @wraps(func)
    def wrapper(v):
        return func(**v)
    return wrapper


def stack(fmt):
    @wraps(fmt)
    def wrapper(*args, **kwargs):
        new_func = fmt(ignore_none=True, *args, **kwargs)

        def stacking(value):
            stack = [new_func(v) for v in value if v]
            stack = [x for args in stack for x in args]
            return stack
        return _ArgFormat(stacking, ignore_none=True)
    return wrapper


def is_argformat(fmt):
    return isinstance(fmt, _ArgFormat)