import contextlib
import sys
from typing import Protocol

from aiocache import cached
from nonebot.compat import model_dump
from pydantic import BaseModel, Field

from zhenxun.utils.http_utils import AsyncHttpx

if sys.version_info >= (3, 11):
    from enum import StrEnum
else:
    from strenum import StrEnum

from .const import (
    CACHED_API_TTL,
    GIT_API_COMMIT_FORMAT,
    GIT_API_PROXY_COMMIT_FORMAT,
    GIT_API_TREES_FORMAT,
    JSD_PACKAGE_API_FORMAT,
)
from .func import (
    get_fastest_archive_formats,
    get_fastest_raw_formats,
    get_fastest_release_source_formats,
)


class RepoInfo(BaseModel):
    """仓库信息"""

    owner: str
    repo: str
    branch: str = "main"

    async def get_raw_download_url(self, path: str) -> str:
        return (await self.get_raw_download_urls(path))[0]

    async def get_archive_download_url(self) -> str:
        return (await self.get_archive_download_urls())[0]

    async def get_release_source_download_url_tgz(self, version: str) -> str:
        return (await self.get_release_source_download_urls_tgz(version))[0]

    async def get_release_source_download_url_zip(self, version: str) -> str:
        return (await self.get_release_source_download_urls_zip(version))[0]

    async def get_raw_download_urls(self, path: str) -> list[str]:
        url_formats = await get_fastest_raw_formats()
        return [
            url_format.format(**self.to_dict(), path=path) for url_format in url_formats
        ]

    async def get_archive_download_urls(self) -> list[str]:
        url_formats = await get_fastest_archive_formats()
        return [url_format.format(**self.to_dict()) for url_format in url_formats]

    async def get_release_source_download_urls_tgz(self, version: str) -> list[str]:
        url_formats = await get_fastest_release_source_formats()
        return [
            url_format.format(**self.to_dict(), version=version, compress="tar.gz")
            for url_format in url_formats
        ]

    async def get_release_source_download_urls_zip(self, version: str) -> list[str]:
        url_formats = await get_fastest_release_source_formats()
        return [
            url_format.format(**self.to_dict(), version=version, compress="zip")
            for url_format in url_formats
        ]

    async def update_repo_commit(self):
        with contextlib.suppress(Exception):
            newest_commit = await self.get_newest_commit(
                self.owner, self.repo, self.branch
            )
            if newest_commit:
                self.branch = newest_commit
                return True
        return False

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

    @classmethod
    @cached(ttl=CACHED_API_TTL)
    async def get_newest_commit(cls, owner: str, repo: str, branch: str) -> str:
        commit_url = GIT_API_COMMIT_FORMAT.format(owner=owner, repo=repo, branch=branch)
        commit_url_proxy = GIT_API_PROXY_COMMIT_FORMAT.format(
            owner=owner, repo=repo, branch=branch
        )
        resp = await AsyncHttpx().get([commit_url, commit_url_proxy])
        return "" if resp.status_code != 200 else resp.json()["sha"]


class APIStrategy(Protocol):
    """API策略"""

    body: BaseModel

    async def parse_repo_info(self, repo_info: RepoInfo) -> BaseModel: ...

    def get_files(self, module_path: str, is_dir: bool) -> list[str]: ...


class RepoAPI:
    """基础接口"""

    def __init__(self, strategy: APIStrategy):
        self.strategy = strategy

    async def parse_repo_info(self, repo_info: RepoInfo):
        body = await self.strategy.parse_repo_info(repo_info)
        self.strategy.body = body

    def get_files(self, module_path: str, is_dir: bool) -> list[str]:
        return self.strategy.get_files(module_path, is_dir)


class FileType(StrEnum):
    """文件类型"""

    FILE = "file"
    DIR = "directory"
    PACKAGE = "gh"


class FileInfo(BaseModel):
    """文件信息"""

    type: FileType
    name: str
    files: list["FileInfo"] = Field(default_factory=list)


class JsdelivrStrategy:
    """Jsdelivr策略"""

    body: FileInfo

    def get_file_paths(self, module_path: str, is_dir: bool = True) -> list[str]:
        """获取文件路径"""
        paths = module_path.split("/")
        filename = "" if is_dir and module_path else paths[-1]
        paths = paths if is_dir and module_path else paths[:-1]
        cur_file = self.body
        for path in paths:  # 导航到正确的目录
            cur_file = next(
                (
                    f
                    for f in cur_file.files
                    if f.type == FileType.DIR and f.name == path
                ),
                None,
            )
            if not cur_file:
                raise ValueError(f"模块路径{module_path}不存在")

        def collect_files(file: FileInfo, current_path: str, filename: str):
            """收集文件"""
            if file.type == FileType.FILE and (not filename or file.name == filename):
                return [f"{current_path}/{file.name}"]
            elif file.type == FileType.DIR and file.files:
                return [
                    path
                    for f in file.files
                    for path in collect_files(
                        f,
                        (
                            f"{current_path}/{f.name}"
                            if f.type == FileType.DIR
                            else current_path
                        ),
                        filename,
                    )
                ]
            return []

        files = collect_files(cur_file, "/".join(paths), filename)
        return files if module_path else [f[1:] for f in files]

    @classmethod
    @cached(ttl=CACHED_API_TTL)
    async def parse_repo_info(cls, repo_info: RepoInfo) -> "FileInfo":
        """解析仓库信息"""

        """获取插件包信息

        参数:
            repo_info: 仓库信息

        返回:
            FileInfo: 插件包信息
        """
        jsd_package_url: str = JSD_PACKAGE_API_FORMAT.format(
            owner=repo_info.owner, repo=repo_info.repo, branch=repo_info.branch
        )
        res = await AsyncHttpx.get(url=jsd_package_url)
        if res.status_code != 200:
            raise ValueError(f"下载错误, code: {res.status_code}")
        return FileInfo(**res.json())

    def get_files(self, module_path: str, is_dir: bool = True) -> list[str]:
        """获取文件路径"""
        return self.get_file_paths(module_path, is_dir)


class TreeType(StrEnum):
    """树类型"""

    FILE = "blob"
    DIR = "tree"


class Tree(BaseModel):
    """树"""

    path: str
    mode: str
    type: TreeType
    sha: str
    size: int | None = None
    url: str


class TreeInfo(BaseModel):
    """树信息"""

    sha: str
    url: str
    tree: list[Tree]


class GitHubStrategy:
    """GitHub策略"""

    body: TreeInfo

    def export_files(self, module_path: str, is_dir: bool) -> list[str]:
        """导出文件路径"""
        tree_info = self.body
        return [
            file.path
            for file in tree_info.tree
            if file.type == TreeType.FILE
            and file.path.startswith(module_path)
            and (not is_dir or file.path[len(module_path)] == "/" or not module_path)
        ]

    @classmethod
    @cached(ttl=CACHED_API_TTL)
    async def parse_repo_info(cls, repo_info: RepoInfo) -> "TreeInfo":
        """获取仓库树

        参数:
            repo_info: 仓库信息

        返回:
            TreesInfo: 仓库树信息
        """
        git_tree_url: str = GIT_API_TREES_FORMAT.format(
            owner=repo_info.owner, repo=repo_info.repo, branch=repo_info.branch
        )
        res = await AsyncHttpx.get(url=git_tree_url)
        if res.status_code != 200:
            raise ValueError(f"下载错误, code: {res.status_code}")
        return TreeInfo(**res.json())

    def get_files(self, module_path: str, is_dir: bool = True) -> list[str]:
        """获取文件路径"""
        return self.export_files(module_path, is_dir)