from collections.abc import Callable
import copy
from pathlib import Path
from typing import Any, TypeVar

import cattrs
from pydantic import BaseModel, Field
from ruamel.yaml import YAML
from ruamel.yaml.scanner import ScannerError

from zhenxun.configs.path_config import DATA_PATH
from zhenxun.services.log import logger
from zhenxun.utils.pydantic_compat import (
    _dump_pydantic_obj,
    _is_pydantic_type,
    model_dump,
    parse_as,
)

from .models import (
    AICallableParam,
    AICallableProperties,
    AICallableTag,
    BaseBlock,
    Command,
    ConfigModel,
    Example,
    PluginCdBlock,
    PluginCountBlock,
    PluginExtraData,
    PluginSetting,
    RegisterConfig,
    Task,
)

_yaml = YAML(pure=True)
_yaml.indent = 2
_yaml.allow_unicode = True

T = TypeVar("T")


class NoSuchConfig(Exception):
    pass


class ConfigGroup(BaseModel):
    """
    配置组
    """

    module: str
    """模块名"""
    name: str | None = None
    """插件名"""
    configs: dict[str, ConfigModel] = Field(default_factory=dict)
    """配置项列表"""

    def get(self, c: str, default: Any = None, *, build_model: bool = True) -> Any:
        """
        获取配置项的值。如果指定了类型，会自动构建实例。
        """
        key = c.upper()
        cfg = self.configs.get(key)

        if cfg is None:
            return default

        value_to_process = cfg.value if cfg.value is not None else cfg.default_value

        if value_to_process is None:
            return default

        if cfg.arg_parser:
            try:
                return cfg.arg_parser(value_to_process)
            except Exception as e:
                logger.debug(
                    f"配置项类型转换 MODULE: [<u><y>{self.module}</y></u>] | "
                    f"KEY: [<u><y>{key}</y></u>] 的自定义解析器失败，将使用原始值",
                    e=e,
                )
                return value_to_process

        if not build_model or not cfg.type:
            return value_to_process

        try:
            if _is_pydantic_type(cfg.type):
                parsed_value = parse_as(cfg.type, value_to_process)
                return parsed_value
            else:
                structured_value = cattrs.structure(value_to_process, cfg.type)
                return structured_value
        except Exception as e:
            logger.error(
                f"❌ 配置项 '{self.module}.{key}' 自动类型转换失败 "
                f"(目标类型: {cfg.type})，将返回原始值。请检查配置文件格式。错误: {e}",
                e=e,
            )
            return value_to_process

    def to_dict(self, **kwargs):
        return model_dump(self, **kwargs)


class ConfigsManager:
    """
    插件配置 与 资源 管理器
    """

    def __init__(self, file: Path):
        self._data: dict[str, ConfigGroup] = {}
        self._simple_data: dict = {}
        self._simple_file = DATA_PATH / "config.yaml"
        self.add_module = []
        _yaml = YAML()
        if file:
            file.parent.mkdir(exist_ok=True, parents=True)
            self.file = file
            self.load_data()
        if self._simple_file.exists():
            try:
                with self._simple_file.open(encoding="utf8") as f:
                    self._simple_data = _yaml.load(f)
            except ScannerError as e:
                raise ScannerError(
                    f"{e}\n**********************************************\n"
                    f"****** 可能为config.yaml配置文件填写不规范 ******\n"
                    f"**********************************************"
                ) from e

    def set_name(self, module: str, name: str):
        """设置插件配置中文名出

        参数:
            module: 模块名
            name: 中文名称

        异常:
            ValueError: module不能为为空
        """
        if not module:
            raise ValueError("set_name: module不能为为空")
        if data := self._data.get(module):
            data.name = name

    def _merge_dicts(self, new_data: dict, original_data: dict) -> dict:
        """合并两个字典，只进行key值的新增和删除操作，不修改原有key的值

        递归处理嵌套字典，确保所有层级的key保持一致

        参数:
            new_data: 新数据字典
            original_data: 原数据字典

        返回:
            合并后的字典
        """
        result = dict(original_data)

        for key, value in new_data.items():
            if key not in original_data:
                result[key] = value
            elif isinstance(value, dict) and isinstance(original_data[key], dict):
                result[key] = self._merge_dicts(value, original_data[key])

        return result

    def _normalize_config_data(self, value: Any, original_value: Any = None) -> Any:
        """标准化配置数据，处理BaseModel和字典的情况

        参数:
            value: 要标准化的值
            original_value: 原始值，用于合并字典

        返回:
            标准化后的值
        """
        processed_value = _dump_pydantic_obj(value)

        if isinstance(processed_value, dict) and original_value is not None:
            processed_original = _dump_pydantic_obj(original_value)

            if isinstance(processed_original, dict):
                return self._merge_dicts(processed_value, processed_original)

        return processed_value

    def add_plugin_config(
        self,
        module: str,
        key: str,
        value: Any,
        *,
        help: str | None = None,
        default_value: Any = None,
        type: type | None = None,
        arg_parser: Callable | None = None,
        _override: bool = False,
    ):
        """为插件添加一个配置，不会被覆盖，只有第一个生效

        参数:
            module: 模块
            key: 键
            value: 值
            help: 配置注解.
            default_value: 默认值.
            type: 值类型.
            arg_parser: 值解析器，一般与webui配合使用.
            _override: 强制覆盖值.

        异常:
            ValueError: module和key不能为为空
            ValueError: 填写错误
        """
        key = key.upper()
        if not module or not key:
            raise ValueError("add_plugin_config: module和key不能为为空")

        existing_value = None
        if module in self._data and (config := self._data[module].configs.get(key)):
            existing_value = config.value

        processed_value = self._normalize_config_data(value, existing_value)
        processed_default_value = self._normalize_config_data(default_value)

        self.add_module.append(f"{module}:{key}".lower())
        if module in self._data and (config := self._data[module].configs.get(key)):
            config.help = help
            config.arg_parser = arg_parser
            config.type = type
            if _override:
                config.value = processed_value
                config.default_value = processed_default_value
        else:
            key = key.upper()
            if not self._data.get(module):
                self._data[module] = ConfigGroup(module=module)
            self._data[module].configs[key] = ConfigModel(
                value=processed_value,
                help=help,
                default_value=processed_default_value,
                type=type,
                arg_parser=arg_parser,
            )

    def set_config(
        self,
        module: str,
        key: str,
        value: Any,
        auto_save: bool = False,
    ):
        """设置配置值

        参数:
            module: 模块名
            key: 配置名称
            value: 值
            auto_save: 自动保存.
        """
        key = key.upper()
        if module in self._data:
            if module not in self._simple_data:
                self._simple_data[module] = {}
            if self._data[module].configs.get(key):
                self._data[module].configs[key].value = value
            else:
                self.add_plugin_config(module, key, value)
            self._simple_data[module][key] = value
            if auto_save:
                self.save(save_simple_data=True)

    def get_config(
        self,
        module: str,
        key: str,
        default: Any = None,
        *,
        build_model: bool = True,
    ) -> Any:
        """
        获取指定配置值，自动构建Pydantic模型或其它类型实例。
        - 兼容Pydantic V1/V2。
        - 支持 list[BaseModel] 等泛型容器。
        - 优先使用Pydantic原生方式解析，失败后回退到cattrs。
        """
        key = key.upper()
        config_group = self._data.get(module)
        if not config_group:
            return default

        config = config_group.configs.get(key)
        if not config:
            return default

        value_to_process = (
            config.value if config.value is not None else config.default_value
        )
        if value_to_process is None:
            return default

        if config.arg_parser:
            try:
                return config.arg_parser(value_to_process)
            except Exception as e:
                logger.debug(
                    f"配置项类型转换 MODULE: [<u><y>{module}</y></u>]"
                    f" | KEY: [<u><y>{key}</y></u>] 将使用原始值",
                    e=e,
                )

        if config.type:
            if _is_pydantic_type(config.type):
                if build_model:
                    try:
                        return parse_as(config.type, value_to_process)
                    except Exception as e:
                        logger.warning(
                            f"pydantic类型转换失败 MODULE: [<u><y>{module}</y></u>] | "
                            f"KEY: [<u><y>{key}</y></u>].",
                            e=e,
                        )
            else:
                try:
                    return cattrs.structure(value_to_process, config.type)
                except Exception as e:
                    logger.warning(
                        f"cattrs类型转换失败 MODULE: [<u><y>{module}</y></u>] | "
                        f"KEY: [<u><y>{key}</y></u>].",
                        e=e,
                    )

        return value_to_process

    def get(self, key: str) -> ConfigGroup:
        """获取插件配置数据

        参数:
            key: 键，一般为模块名

        返回:
            ConfigGroup: ConfigGroup
        """
        if key not in self._data:
            self._data[key] = ConfigGroup(module=key)
        return self._data[key]

    def save(self, path: str | Path | None = None, save_simple_data: bool = False):
        """保存数据

        参数:
            path: 路径.
            save_simple_data: 同时保存至config.yaml.
        """
        if save_simple_data:
            with open(self._simple_file, "w", encoding="utf8") as f:
                _yaml.dump(self._simple_data, f)
        path = path or self.file
        save_data = {
            module: {
                config_key: model_dump(config_model, exclude={"type", "arg_parser"})
                for config_key, config_model in config_group.configs.items()
            }
            for module, config_group in self._data.items()
        }
        with open(path, "w", encoding="utf8") as f:
            _yaml.dump(save_data, f)

    def reload(self):
        """重新加载配置文件"""
        if self._simple_file.exists():
            with open(self._simple_file, encoding="utf8") as f:
                self._simple_data = _yaml.load(f)
        for key in self._simple_data.keys():
            for k in self._simple_data[key].keys():
                self._data[key].configs[k].value = self._simple_data[key][k]
        self.save()

    def load_data(self):
        """加载数据

        异常:
            ValueError: 配置文件为空！
        """
        if not self.file.exists():
            return
        with open(self.file, encoding="utf8") as f:
            temp_data = _yaml.load(f)
        if not temp_data:
            self.file.unlink()
            raise ValueError(
                "配置文件为空！\n"
                "***********************************************************\n"
                "****** 配置文件 plugins2config.yaml 为空，已删除，请重启 ******\n"
                "***********************************************************"
            )
        count = 0
        for module in temp_data:
            config_group = ConfigGroup(module=module)
            for config in temp_data[module]:
                config_group.configs[config] = ConfigModel(**temp_data[module][config])
                count += 1
            self._data[module] = config_group
        logger.info(
            f"加载配置完成，共加载 <u><y>{len(temp_data)}</y></u> 个配置组及对应"
            f" <u><y>{count}</y></u> 个配置项"
        )

    def get_data(self) -> dict[str, ConfigGroup]:
        return copy.deepcopy(self._data)

    def is_empty(self) -> bool:
        return not bool(self._data)

    def keys(self):
        return self._data.keys()

    def __str__(self):
        return str(self._data)

    def __setitem__(self, key, value):
        self._data[key] = value

    def __getitem__(self, key):
        return self._data[key]


__all__ = [
    "AICallableParam",
    "AICallableProperties",
    "AICallableTag",
    "BaseBlock",
    "Command",
    "ConfigGroup",
    "ConfigModel",
    "ConfigsManager",
    "Example",
    "NoSuchConfig",
    "PluginCdBlock",
    "PluginCountBlock",
    "PluginExtraData",
    "PluginSetting",
    "RegisterConfig",
    "Task",
]