from __future__ import annotations

from contextlib import asynccontextmanager
from typing import Any
from uuid import UUID

import pytest

from src.models.approval import ApprovalRequest, RiskLevel
from src.plugins.mcp.interfaces import MCPToolResult
from src.services.approval_execution import ApprovalExecutionService


class FakeRedis:
    def __init__(self) -> None:
        self.set_calls: list[tuple[str, str, int | None]] = []

    async def set(self, key: str, value: str, ex: int | None = None) -> None:
        self.set_calls.append((key, value, ex))


@pytest.mark.asyncio
async def test_ssh_approval_execution_projects_approval_into_gateway(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    fake_redis = FakeRedis()
    gateway_calls: list[dict[str, Any]] = []
    db_context_projects: list[str | None] = []
    fake_db = object()

    @asynccontextmanager
    async def fake_db_context(project_id: str | None = None):
        db_context_projects.append(project_id)
        yield fake_db

    class FakeGateway:
        def __init__(self, db: object) -> None:
            self.db = db

        async def call(self, ctx: Any, parameters: dict[str, Any]) -> MCPToolResult:
            gateway_calls.append({"db": self.db, "ctx": ctx, "parameters": parameters})
            return MCPToolResult(
                success=True,
                output={"tool": ctx.tool_name, "ok": True},
                execution_id="fake-gateway-ssh-exec",
            )

    monkeypatch.setattr("src.services.approval_execution.get_redis", lambda: fake_redis)
    monkeypatch.setattr("src.services.approval_execution.get_db_context", fake_db_context)
    monkeypatch.setattr("src.services.approval_execution.McpGateway", FakeGateway)

    approval = ApprovalRequest(
        action="docker restart sentry-worker",
        description="測試 SSH approved execution gateway audit",
        risk_level=RiskLevel.LOW,
        requested_by="test",
        required_signatures=0,
        incident_id="INC-TEST-GATEWAY",
    )

    result = await ApprovalExecutionService()._execute_ssh_host_action(
        approval=approval,
        host="192.168.0.110",
    )

    assert result.success is True
    assert db_context_projects == ["awoooi"]
    assert len(gateway_calls) == 1

    call = gateway_calls[0]
    ctx = call["ctx"]
    assert ctx.project_id == "awoooi"
    assert ctx.agent_id == "approval_executor"
    assert ctx.tool_name == "ssh_docker_restart"
    assert ctx.required_scope == "write"
    assert ctx.is_shadow is False
    assert ctx.environment == {"env": "prod"}
    assert ctx.run_id == approval.id
    assert isinstance(ctx.run_id, UUID)
    assert ctx.trace_id == "INC-TEST-GATEWAY"

    parameters = call["parameters"]
    assert parameters["host"] == "192.168.0.110"
    assert parameters["container_name"] == "sentry-worker"
    assert parameters["trust_score"] == 0.85
    assert parameters["_mcp_audit"]["agent_role"] == "approval_executor"
    assert parameters["_mcp_audit"]["flywheel_node"] == "execute"
    assert parameters["_mcp_audit"]["incident_id"] == "INC-TEST-GATEWAY"

    assert fake_redis.set_calls == [
        (
            f"mcp_approval:awoooi:approval_executor:ssh_docker_restart:{approval.id}",
            "approved",
            600,
        )
    ]


@pytest.mark.asyncio
async def test_ssh_diagnose_approval_uses_gateway_without_gate5_projection(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    fake_redis = FakeRedis()
    gateway_calls: list[dict[str, Any]] = []

    @asynccontextmanager
    async def fake_db_context(project_id: str | None = None):
        yield {"project_id": project_id}

    class FakeGateway:
        def __init__(self, db: object) -> None:
            self.db = db

        async def call(self, ctx: Any, parameters: dict[str, Any]) -> MCPToolResult:
            gateway_calls.append({"db": self.db, "ctx": ctx, "parameters": parameters})
            return MCPToolResult(
                success=True,
                output={"tool": ctx.tool_name, "ok": True},
                execution_id="fake-gateway-read-exec",
            )

    monkeypatch.setattr("src.services.approval_execution.get_redis", lambda: fake_redis)
    monkeypatch.setattr("src.services.approval_execution.get_db_context", fake_db_context)
    monkeypatch.setattr("src.services.approval_execution.McpGateway", FakeGateway)

    approval = ApprovalRequest(
        action="df -h",
        description="測試 SSH diagnose gateway audit",
        risk_level=RiskLevel.LOW,
        requested_by="test",
        required_signatures=0,
        incident_id="INC-TEST-READ",
    )

    result = await ApprovalExecutionService()._execute_ssh_host_action(
        approval=approval,
        host="192.168.0.110",
    )

    assert result.success is True
    assert fake_redis.set_calls == []
    assert len(gateway_calls) == 1
    ctx = gateway_calls[0]["ctx"]
    assert ctx.agent_id == "approval_executor"
    assert ctx.tool_name == "ssh_diagnose"
    assert ctx.required_scope == "read"
    assert ctx.is_shadow is False