from __future__ import annotations

from collections.abc import Generator
from pathlib import Path
from unittest.mock import patch

import pygit2
import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from pygittools.tasks import BOARD_REF_PREFIX, Board
from pygitweb.auth_config import AuthConfig, LocalUser
from pygitweb.config import settings
from pygitweb.conftest import client_as_user
from pygitweb.permissions import Permission, permission_key, permissions_with_defaults
from pygitweb.tasks import EMPTY_TREE_OID, task_router

_TASKS_AUTH = AuthConfig(
	auth_mode="local",
	local_users=[LocalUser(user="admin", password="secret"), LocalUser(user="viewer", password="secret")],
	oauth_permissions=permissions_with_defaults({
		permission_key(Permission.TASKS, "demo"): ["admin"],
	}),
)


def _build_client() -> TestClient:
	app = FastAPI()
	app.include_router(task_router, prefix="/tasks")
	return TestClient(app)


def _create_initial_commit(repo: pygit2.Repository, repo_dir: Path) -> None:
	(repo_dir / "README.md").write_text("seed\n", encoding="utf-8")
	index = repo.index
	index.add("README.md")
	index.write()
	tree = index.write_tree()
	sig = pygit2.Signature("tester", "tester@example.com")
	repo.create_commit("HEAD", sig, sig, "initial", tree, [])


@pytest.fixture
def task_env(tmp_path: Path) -> Generator[dict[str, str | TestClient], None, None]:
	repo_dir = tmp_path / "demo"
	repo = pygit2.init_repository(str(repo_dir), bare=False)
	_create_initial_commit(repo, repo_dir)
	board = Board(EMPTY_TREE_OID, f"{BOARD_REF_PREFIX}Tasks", tagger="", description="")
	board.write(repo)
	with (
		patch.object(settings, "PROJECTROOT", str(tmp_path)),
		patch.object(settings, "PROJECTS_LIST", str(tmp_path)),
		patch.object(settings, "STRICT_EXPORT", False),
		patch.object(settings, "EXPORT_OK", ""),
		patch.object(settings, "LIST_ALL", True),
		patch("pygitweb.auth_config.auth_config", _TASKS_AUTH),
		patch("pygitweb.auth.auth_config", _TASKS_AUTH),
	):
		yield {"client": _build_client(), "project": "demo", "board": "Tasks"}


def test_task_post_open_when_auth_disabled(task_env: dict[str, str | TestClient]) -> None:
	client = task_env["client"]
	assert isinstance(client, TestClient)
	with patch.object(settings, "AUTH", False):
		r = client.post(
			"/tasks/create",
			params={
				"project": task_env["project"],
				"board": task_env["board"],
				"title": "New task",
			},
		)
	assert r.status_code == 200


def test_task_create_401_without_login(task_env: dict[str, str | TestClient]) -> None:
	client = task_env["client"]
	assert isinstance(client, TestClient)
	with patch.object(settings, "AUTH", True):
		r = client.post(
			"/tasks/create",
			params={
				"project": task_env["project"],
				"board": task_env["board"],
				"title": "New task",
			},
		)
	assert r.status_code == 401


def test_task_create_allowed_with_grant(task_env: dict[str, str | TestClient]) -> None:
	client = task_env["client"]
	assert isinstance(client, TestClient)
	with patch.object(settings, "AUTH", True), client_as_user(client, "admin"):
		r = client.post(
			"/tasks/create",
			params={
				"project": task_env["project"],
				"board": task_env["board"],
				"title": "Granted task",
			},
		)
	assert r.status_code == 200


def test_task_create_forbidden_without_grant(task_env: dict[str, str | TestClient]) -> None:
	client = task_env["client"]
	assert isinstance(client, TestClient)
	with patch.object(settings, "AUTH", True), client_as_user(client, "viewer"):
		r = client.post(
			"/tasks/create",
			params={
				"project": task_env["project"],
				"board": task_env["board"],
				"title": "Denied task",
			},
		)
	assert r.status_code == 403


def test_task_update_forbidden_without_grant(task_env: dict[str, str | TestClient]) -> None:
	client = task_env["client"]
	assert isinstance(client, TestClient)
	with patch.object(settings, "AUTH", True), client_as_user(client, "viewer"):
		r = client.post(
			"/tasks/update",
			params={
				"project": task_env["project"],
				"board": task_env["board"],
				"task": "refs/tags/tasks/task_missing",
			},
			json={"title": "nope"},
		)
	assert r.status_code == 403