import pytest
from gnuradio.grc.core.platform import Platform
from gnuradio_mcp.middlewares.flowgraph import FlowGraphMiddleware
from gnuradio import gr

from gnuradio_mcp.models import BlockModel

@pytest.fixture(scope="module")
def platform() -> Platform:
    platform = Platform(
        version=gr.version(),
        version_parts=(gr.major_version(), gr.api_version(), gr.minor_version()),
        prefs=gr.prefs(),
    )
    platform.build_library()
    return platform

@pytest.fixture
def flowgraph_middleware(platform):
    flowgraph = platform.make_flow_graph("")
    return FlowGraphMiddleware(flowgraph)

@pytest.fixture
def initial_blocks(flowgraph_middleware):
    return [
        BlockModel(key=block.key, label=block.label)
        for block in flowgraph_middleware._flowgraph.blocks
    ]

def test_blocks_match_initial_state(flowgraph_middleware, initial_blocks):
    assert flowgraph_middleware.blocks == initial_blocks

@pytest.mark.parametrize("block_index", [1, 2, 3])
def test_add_block_preserves_and_adds(flowgraph_middleware, platform, initial_blocks, block_index):
    block_keys = list(platform.blocks.keys())
    assert block_keys, "No blocks available in platform library."
    block_key = block_keys[block_index]
    block_name = "test_block"
    flowgraph_middleware.add_block(block_key, block_name)
    blocks = flowgraph_middleware.blocks
    assert all(b in blocks for b in initial_blocks)
    assert any(b.key == block_key for b in blocks)