import os

from astrbot.core import logger
from astrbot.core.utils.media_utils import file_uri_to_path, is_file_uri


def path_Mapping(mappings, srcPath: str) -> str:
    """路径映射处理函数。尝试支援 Windows 和 Linux 的路径映射。
    Args:
        mappings: 映射规则列表
        srcPath: 原路径
    Returns:
        str: 处理后的路径
    """
    for mapping in mappings:
        rule = mapping.split(":")
        if len(rule) == 2:
            from_, to_ = mapping.split(":")
        elif len(rule) > 4 or len(rule) == 1:
            # 切割后大于4个项目，或者只有1个项目，那肯定是错误的，只能是2，3，4个项目
            logger.warning(f"路径映射规则错误: {mapping}")
            continue
        # rule.len == 3 or 4
        elif os.path.exists(rule[0] + ":" + rule[1]):
            # 前面两个项目合并路径存在，说明是本地Window路径。后面一个或两个项目组成的路径本地大概率无法解析，直接拼接
            from_ = rule[0] + ":" + rule[1]
            if len(rule) == 3:
                to_ = rule[2]
            else:
                to_ = rule[2] + ":" + rule[3]
        else:
            # 前面两个项目合并路径不存在，说明第一个项目是本地Linux路径，后面一个或两个项目直接拼接。
            from_ = rule[0]
            if len(rule) == 3:
                to_ = rule[1] + ":" + rule[2]
            else:
                # 这种情况下存在四个项目，说明规则也是错误的
                logger.warning(f"路径映射规则错误: {mapping}")
                continue

        from_ = from_.removesuffix("/")
        from_ = from_.removesuffix("\\")
        to_ = to_.removesuffix("/")
        to_ = to_.removesuffix("\\")
        # logger.debug(f"\t路径映射-规则(处理): {from_} -> {to_}")

        url = file_uri_to_path(srcPath) if is_file_uri(srcPath) else srcPath
        if url.startswith(from_):
            srcPath = url.replace(from_, to_, 1)
            if ":" in srcPath:
                # Windows路径处理
                srcPath = srcPath.replace("/", "\\")
            else:
                has_replaced_processed = False
                if srcPath.startswith("."):
                    # 相对路径处理。如果是相对路径，可能是Linux路径，也可能是Windows路径
                    sign = srcPath[1]
                    # 处理两个点的情况
                    if sign == ".":
                        sign = srcPath[2]
                    if sign == "/":
                        srcPath = srcPath.replace("\\", "/")
                        has_replaced_processed = True
                    elif sign == "\\":
                        srcPath = srcPath.replace("/", "\\")
                        has_replaced_processed = True
                if not has_replaced_processed:
                    # 如果不是相对路径或不能处理，默认按照Linux路径处理
                    srcPath = srcPath.replace("\\", "/")
            logger.info(f"路径映射: {url} -> {srcPath}")
            return srcPath
    return srcPath
