from __future__ import annotations
import requests
import urllib.parse
from uuid import UUID
import logging

DEVOPS_SCOPE = "https://app.vssps.visualstudio.com/.default"
DEVOPS_API_VERSION = "7.1"

# Get logger. It should be configured by the main application.
log = logging.getLogger(__name__)
# log.setLevel(logging.DEBUG)
# log.propagate = False

# Define a class decorator
def auto_properties(mapping: dict[str,str]):

    def make_property(name: str):
        private_var = f"_{name}"

        def getter(self):
            try:
                i = getattr(self, private_var)
                if i is not None:
                    return i
            except AttributeError:
                pass

            # Fetch repository details from the API if it is set to None or not existing
            self.get_auto_properties()
            return getattr(self, private_var)

        return property(fget=getter)

    def from_args(self, **kwargs):
        for name in kwargs:
            if name in self.__class__.__auto_properties__:
                setattr(self, f"_{name}", kwargs.get(name, None))

    def from_json(self, json_data: dict):
        for name in self.__class__.__auto_properties__:
            setattr(self, f"_{name}", json_data.get(self.__class__.__auto_properties__[name], None))

    def decorator(cls):
        cls.__auto_properties__ = mapping # Make a copy of the mapping

        # Create properties dynamically
        for name in mapping:
            setattr(cls, name, make_property(name))

        setattr(cls, "from_args", from_args)
        setattr(cls, "from_json", from_json)

        return cls
    return decorator

def get_url(URL: str, token: str, api_version: str, params: dict = {}) -> requests.Response:
    """Helper method to make GET requests to DevOps REST API."""
    if not URL or not token or not api_version:
        raise ValueError("Organization URL, token, and API version must be set before making requests.")

    request_parameters = {
        "api-version": api_version,
        **params
    }
    log.debug(f"Making GET request", extra={"url": URL, "params": request_parameters, "http_method": "get"})
    r = requests.get(url=URL, params=request_parameters, headers={
        "Authorization": f"Bearer {token}"
    })
    r.raise_for_status() # Ensure we raise an error for bad responses
    return r.json() # Return parsed JSON response

class Organization(): 
    def __init__(self, org_url: str, token: str | None = None, api_version: str = DEVOPS_API_VERSION):
        self._org_url = org_url.rstrip("/") + "/" # Ensure trailing slash
        self._token = token
        self._api_version = api_version
        log.debug(f"Created new Organization object", extra={"entity_class": "Organization"})

    def get_path(self, path: str, params: dict = {}) -> dict:
        return get_url(
            URL=urllib.parse.urljoin(self._org_url, path),
            token=self._token,
            api_version=self._api_version,
            params=params
        )

    @property
    def projects(self):
        if not hasattr(self, "_projects"):
            # Create Project objects
            self._projects = [Project(org=self, **proj) for proj in self.get_path("_apis/projects").get("value", [])]
        return self._projects

    def __getitem__(self, key: str) -> Project:
        for project in self.projects:
            if project.id == key or project.name == key:
                return project
        raise KeyError(f"Project with ID or name '{key}' not found.")

    def __str__(self):
        return f"Organization(url=\"{self._org_url}\")"

@auto_properties({
    "id":          "id",
    "name":        "name",
    "url":         "url",
    "description": "description"
    })
class Project():
    def __init__(self, org: Organization, **kwargs):
        self._org = org
        self.from_args(**kwargs)

        if not hasattr(self, "_id") or self._id is None:
            raise ValueError("Project ID must be provided.")

        try:
            self._id = str(UUID(self._id))
        except ValueError:
            raise ValueError(f"Invalid project ID: {self._id}")

        log.debug(f"Created new Project object", extra={"entity_class": "Project"})

    def get_auto_properties(self):
        r = get_url(
            URL=f"{self._org._org_url}_apis/projects/{self._id}",
            token=self._org._token,
            api_version=self._org._api_version
        )
        self.from_json(r)

    def __str__(self):
        return f"Project(name=\"{self.name}\", id={self.id})"

    @property
    def id(self):
        return self._id

    @property
    def organization(self):
        return self._org

    @property
    def repositories(self):
        if not hasattr(self, "_repositories"):
            self._repositories = [Repository(project=self, **repo) for repo in self._org.get_path(f"{self._id}/_apis/git/repositories").get("value", [])]
        return self._repositories

    def __getitem__(self, key: str) -> Repository:
        for repo in self.repositories:
            if repo.id == key or repo.name == key:
                return repo
        raise KeyError(f"Repository with ID or name '{key}' not found.")

@auto_properties({
    "id": "id",
    "name": "name",
    "url": "url",
    "default_branch": "defaultBranch",
    "is_disabled": "isDisabled",
    "is_in_maintenance": "isInMaintenance",
    "remote_url": "remoteUrl",
    "ssh_url": "sshUrl",
    "web_url": "webUrl"
    })
class Repository():
    def __init__(self, project: Project, **kwargs):
        self._project = project

        if "id" not in kwargs and "name" not in kwargs:
            raise ValueError("Either repository ID or name must be provided.")

        if "id" in kwargs:
            try:
                UUID(kwargs.get("id")) # Check if it's a valid UUID
            except ValueError:
                raise ValueError("Invalid repository ID, must be a valid UUID.")

        # set other properties if provided
        self.from_args(**kwargs)
        log.debug(f"Created new {self.__class__.__name__} object", extra={"entity_class": self.__class__.__name__})

    def get_auto_properties(self):
        id = self._id if hasattr(self, "_id") else self._name
        if id is None or id == "":
            raise ValueError("Repository ID or name must be set to fetch properties.")

        r = self._project.organization.get_path(path=f"{self._project.id}/_apis/git/repositories/{id}")
        self.from_json(r)

    @property
    def id(self):
        return self._id

    @property
    def project(self):
        return self._project

    def __str__(self):
        return f"Repository(name={self.name}, id={self._id})"

    @property
    def items(self):
        if not hasattr(self, "_items"):
            self._items = self._entities(
                entity_class=Item,
                key_name="path",
                list_url=f"{self._project.id}/_apis/git/repositories/{self._id}/items",
                params={
                    "scopePath": "/",
                    "recursionLevel": "oneLevel"
                }
            )
        return self._items

    def __getitem__(self, key: str) -> Item:
        for item in self.items:
            if item.path == key:
                return item
        raise KeyError(f"Item with path '{key}' not found.")

@auto_properties({
    "object_id":       "objectId",
    "git_object_type": "gitObjectType",
    "commit_id":       "commitId",
    "is_folder":       "isFolder",
    "url":             "url"
    })
class Item():
    def __init__(self, repository: Repository, path: str, **kwargs):
        self._repository = repository
        self._path = path
        self.set_auto_properties(**kwargs) # set properties defined in decorator
        log.debug(f"Created new {self.__class__.__name__} object", extra={"entity_class": self.__class__.__name__})

    def _get(self):
        pass
        # self._get_entity(
        #     key_name="path",
        #     get_url=f"{self._repository._project.id}/_apis/git/repositories/{self._repository.id}/items",
        #     params={
        #         "path": self._path,
        #         "$format": "json",
        #         "recursionLevel": "none"
        #     }
        # )

    @property
    def path(self):
        return self._path

    @property
    def children(self):
        """List items under this item if it is a folder."""
        if self.git_object_type == "tree":
            return self._entities(
                entity_class=Item,
                key_name="path",
                list_url=f"{self._repository._project.id}/_apis/git/repositories/{self._repository.id}/items",
                params={
                    "scopePath": self._path,
                    "recursionLevel": "oneLevel"
                }
            )
        else:
            raise ValueError("Items can only be listed for folder items.")

    def __str__(self):
        return f"Item(path=\"{self._path}\")"