from __future__ import annotations

import os
from unittest.mock import MagicMock, patch

from fastapi import FastAPI, Request
from fastapi.testclient import TestClient

from app.auth.brain_auth import with_brain_auth_provider
from app.auth.interface import IAuthProvider
from app.auth.local_control import (
    LOCAL_CONTROL_CAPABILITY_HEADER,
    require_local_control_principal,
)
from app.controller import (
    chat_controller,
    remote_command_controller,
    run_controller,
    workspace_bundle_controller,
)
from app.run_journal import IdempotencyConflictError, RunNotFoundError


class _VerifiedAuth(IAuthProvider):
    async def authenticate(self, scope):
        _ = scope
        return {"user_id": "user-1", "tenant_id": "tenant-1"}


class _UnexpectedCloudAuth(IAuthProvider):
    async def authenticate(self, scope):
        _ = scope
        raise AssertionError("Desktop capability must not invoke Cloud auth")


def _app() -> FastAPI:
    app = FastAPI()

    @app.get("/control")
    async def control(request: Request):
        return await require_local_control_principal(request)

    return app


def test_electron_control_requires_matching_loopback_capability(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    client = TestClient(_app(), client=("127.0.0.1", 50000))

    assert client.get("/control").status_code == 401
    assert (
        client.get(
            "/control", headers={LOCAL_CONTROL_CAPABILITY_HEADER: "wrong"}
        ).status_code
        == 401
    )
    response = client.get(
        "/control", headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"}
    )
    assert response.status_code == 200
    assert response.json()["kind"] == "desktop_renderer"
    assert "EIGENT_LOCAL_CONTROL_CAPABILITY" not in os.environ


def test_device_and_link_identity_do_not_replace_renderer_capability(
    monkeypatch,
):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    client = TestClient(_app(), client=("127.0.0.1", 50000))

    response = client.get(
        "/control",
        headers={
            "Authorization": "Bearer cloud-user-token",
            "X-Desktop-Instance-ID": "device-1",
            "X-Remote-Control-Token": "link-1",
        },
    )

    assert response.status_code == 401


def test_desktop_capability_is_independent_from_cloud_auth(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    client = TestClient(_app(), client=("127.0.0.1", 50000))

    with with_brain_auth_provider(_UnexpectedCloudAuth()):
        response = client.get(
            "/control",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"},
        )

    assert response.status_code == 200


def test_electron_control_fails_closed_when_capability_is_missing(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.delenv("EIGENT_LOCAL_CONTROL_CAPABILITY", raising=False)

    response = TestClient(_app()).get(
        "/control", headers={"Authorization": "Bearer cloud-user-token"}
    )

    assert response.status_code == 503


def test_non_loopback_cannot_use_desktop_capability(monkeypatch):
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    client = TestClient(_app(), client=("203.0.113.8", 50000))

    response = client.get(
        "/control", headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"}
    )

    assert response.status_code == 403


def test_desktop_capability_is_immutable_after_process_capture(
    monkeypatch,
):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "startup-1")
    client = TestClient(_app(), client=("127.0.0.1", 50000))
    assert (
        client.get(
            "/control",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "startup-1"},
        ).status_code
        == 200
    )

    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "startup-2")

    assert (
        client.get(
            "/control",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "startup-1"},
        ).status_code
        == 200
    )
    assert (
        client.get(
            "/control",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "startup-2"},
        ).status_code
        == 401
    )


def test_non_electron_control_requires_brain_authorization(monkeypatch):
    monkeypatch.delenv("EIGENT_RUNTIME", raising=False)
    monkeypatch.delenv("EIGENT_LOCAL_CONTROL_CAPABILITY", raising=False)
    client = TestClient(_app())

    assert client.get("/control").status_code == 503
    assert (
        client.get(
            "/control", headers={"Authorization": "Bearer unverified-token"}
        ).status_code
        == 503
    )
    with with_brain_auth_provider(_VerifiedAuth()):
        assert client.get("/control").status_code == 401
        response = client.get(
            "/control", headers={"Authorization": "Bearer verified-token"}
        )
        assert response.status_code == 200
        assert response.json()["kind"] == "brain_user"


def test_run_and_command_routers_enforce_the_control_principal(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    app = FastAPI()
    app.include_router(run_controller.router)
    app.include_router(remote_command_controller.router)
    client = TestClient(app, client=("127.0.0.1", 50000))
    journal = MagicMock()
    journal.get_run.return_value = None
    journal.list_reconcilable_commands.return_value = []

    assert client.get("/runs/missing").status_code == 401
    assert (
        client.get("/remote-control/commands/inbox/pending").status_code == 401
    )
    with (
        patch(
            "app.controller.run_controller.get_default_run_journal",
            return_value=journal,
        ),
        patch(
            "app.controller.remote_command_controller.get_default_run_journal",
            return_value=journal,
        ),
    ):
        headers = {LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"}
        assert client.get("/runs/missing", headers=headers).status_code == 404
        response = client.get(
            "/remote-control/commands/inbox/pending", headers=headers
        )
        assert response.status_code == 200
        assert response.json() == {"items": []}


def test_mutating_chat_routes_require_the_control_principal(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    app = FastAPI()
    app.include_router(chat_controller.router)
    client = TestClient(app, client=("127.0.0.1", 50000))

    assert client.delete("/chat/project-1").status_code == 401
    assert (
        client.post(
            "/chat/project-1/human-reply",
            json={"agent": "browser", "reply": "approve"},
        ).status_code
        == 401
    )
    assert (
        client.delete(
            "/chat/project-1",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"},
        ).status_code
        == 204
    )


def test_every_mutating_chat_route_declares_the_control_principal():
    mutating_methods = {"POST", "PUT", "PATCH", "DELETE"}
    mutating_routes = [
        route
        for route in chat_controller.router.routes
        if set(getattr(route, "methods", set())) & mutating_methods
    ]

    assert mutating_routes
    for route in mutating_routes:
        assert any(
            dependency.call is require_local_control_principal
            for dependency in route.dependant.dependencies
        ), f"{sorted(route.methods)} {route.path} is missing control auth"


def test_every_bundle_install_route_requires_local_control_capability():
    assert workspace_bundle_controller.router.routes
    for route in workspace_bundle_controller.router.routes:
        assert any(
            dependency.call is require_local_control_principal
            for dependency in route.dependant.dependencies
        ), f"{sorted(route.methods)} {route.path} is missing control auth"
    assert "server_url" not in (
        workspace_bundle_controller.BundleProposalBody.model_fields
    )
    assert "server_url" not in (
        workspace_bundle_controller.BundleMaterializeBody.model_fields
    )


def test_command_result_maps_missing_command_to_not_found(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    app = FastAPI()
    app.include_router(remote_command_controller.router)
    client = TestClient(app, client=("127.0.0.1", 50000))
    journal = MagicMock()
    journal.append_command_result.side_effect = RunNotFoundError("missing")

    with patch(
        "app.controller.remote_command_controller.get_default_run_journal",
        return_value=journal,
    ):
        response = client.post(
            "/remote-control/commands/missing/result",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"},
            json={
                "status": "completed",
                "event_id": "missing:execution-result",
                "result": {},
            },
        )

    assert response.status_code == 404
    assert response.json()["detail"]["code"] == "REMOTE_COMMAND_NOT_FOUND"


def test_command_result_maps_idempotency_conflict(monkeypatch):
    monkeypatch.setenv("EIGENT_RUNTIME", "electron")
    monkeypatch.setenv("EIGENT_LOCAL_CONTROL_CAPABILITY", "secret-1")
    app = FastAPI()
    app.include_router(remote_command_controller.router)
    client = TestClient(app, client=("127.0.0.1", 50000))
    journal = MagicMock()
    journal.append_command_result.side_effect = IdempotencyConflictError(
        "event payload differs"
    )

    with patch(
        "app.controller.remote_command_controller.get_default_run_journal",
        return_value=journal,
    ):
        response = client.post(
            "/remote-control/commands/command-1/result",
            headers={LOCAL_CONTROL_CAPABILITY_HEADER: "secret-1"},
            json={
                "status": "failed",
                "event_id": "command-1:recovery-outcome-unknown",
                "result": {},
            },
        )

    assert response.status_code == 409
    assert response.json()["detail"]["code"] == "REMOTE_COMMAND_CONFLICT"