"""Tests for lib/state.py — state store and collect functions."""

from unittest.mock import patch

from lib.state import State, state


class TestState:
    def test_new_state_empty(self):
        s = State()
        assert s.get("firewall") is None
        assert s.is_populated() is False

    def test_set_and_get(self):
        s = State()
        s.set("firewall", {"zones": {"public": {}}})
        assert s.get("firewall") == {"zones": {"public": {}}}

    def test_populate_all(self):
        s = State()
        with patch.object(s, "_data", {}):
            pass
        # Just verify populate doesn't crash on empty collectors
        # (our collect functions need subprocess, so test mocks only)
        pass

    def test_singleton_exists(self):
        assert state is not None
        assert isinstance(state, State)


class TestCollectAll:
    @patch("lib.state.run")
    def test_collect_firewall_returns_dict(self, mock_run):
        from lib.state import _collect_firewall

        def run_side(args, **kwargs):
            if "--get-zones" in args:
                return "public\ninternal"
            if "--get-active-zones" in args:
                return "public\n  eth0"
            if "--get-services" in args:
                return "ssh http"
            if "ip" in args[0]:
                if "link" in args:
                    return "1: lo: <LOOPBACK> mtu 65536\n2: eth0: <UP> mtu 1500 link/ether aa:bb\n"
                return ""
            if "--list-all" in args:
                return "target: default\ninterfaces: eth0\nsources: \nservices: \nports: \nprotocols: \nforward-ports: \nmasquerade: no\nics: no\nrich-rules: \nicmp-blocks: \nmodule: \n"
            return ""

        mock_run.side_effect = run_side
        result = _collect_firewall()
        assert isinstance(result, dict)
        assert "active_zones" in result
        assert "interfaces" in result
        assert "timestamp" in result

    @patch("lib.state.run")
    def test_collect_firewall_vlan_ips_populated(self, mock_run):
        """VLAN interfaces with @suffix in ip addr output get their IPs collected."""
        from lib.state import _collect_firewall

        def run_side(args, **kwargs):
            if "--get-zones" in args:
                return "public\ninternal"
            if "--get-active-zones" in args:
                return "public\n  eth0\ninternal  eth0.100"
            if "--get-services" in args:
                return "ssh http"
            if "ip" in args[0]:
                if "link" in args:
                    return (
                        "1: lo: <LOOPBACK> mtu 65536\n"
                        "2: eth0: <UP> mtu 1500 link/ether aa:bb\n"
                        "3: eth0.100@eth0: <UP> mtu 1500 link/ether aa:bb\n"
                    )
                if "addr" in args:
                    return (
                        "2: eth0    inet 192.168.1.1/24\n"
                        "3: eth0.100@if100    inet 10.0.0.1/24\n"
                    )
                return ""
            if "--list-all" in args:
                return (
                    "target: default\ninterfaces: eth0\nsources: "
                    "services: \nports: \nprotocols: \nforward-ports: "
                    "masquerade: no\nics: no\nrich-rules: "
                    "icmp-blocks: \nmodule: \n"
                )
            return ""

        mock_run.side_effect = run_side
        result = _collect_firewall()
        vlan_iface = next(
            (i for i in result["interfaces"] if i["name"] == "eth0.100"), None
        )
        assert vlan_iface is not None, "VLAN interface should be present"
        assert vlan_iface["ips"], "VLAN interface should have collected IPs"
        assert "10.0.0.1/24" in vlan_iface["ips"]

    @patch("lib.state.run_proc")
    def test_collect_dnsmasq_returns_dict(self, mock_proc):
        from unittest.mock import Mock

        from lib.state import _collect_dnsmasq

        mock_proc.return_value = Mock(stdout="active\n", returncode=0)
        result = _collect_dnsmasq()
        assert isinstance(result, dict)
        assert "status" in result
        assert "config" in result
        assert "leases" in result


class TestCollectFailure:
    def test_state_clears_on_failure(self):
        """State collection failure sets the subsystem to None."""
        s = State()
        s.set("firewall", {"zones": {"public": {}}})
        s.set("firewall", None)  # simulates failure
        assert s.get("firewall") is None
        assert s.is_populated() is False


class TestStateVersions:
    def test_version_starts_at_zero(self):
        s = State()
        versions = s.get_versions()
        assert versions["firewall"] == 0
        assert versions["dnsmasq"] == 0

    def test_bump_increments_version(self):
        s = State()
        assert s.get_versions()["firewall"] == 0
        s.bump("firewall")
        assert s.get_versions()["firewall"] == 1

    def test_bump_unknown_subsystem_noop(self):
        s = State()
        versions = s.get_versions()
        s.bump("nonexistent")
        assert versions == s.get_versions()

    def test_get_updated_versions_first_call_empty(self):
        s = State()
        s.bump("firewall")
        updated = s.get_updated_versions()
        assert updated == {}
        assert s.get_updated_versions() == {}

    def test_get_updated_versions_detects_change(self):
        s = State()
        _ = s.get_updated_versions()  # snapshot
        s.bump("firewall")
        updated = s.get_updated_versions()
        assert updated["firewall"] == 1

    def test_broadcast_maintains_snapshot(self):
        s = State()
        s.bump("firewall")
        s.bump("dnsmasq")
        _ = s.get_updated_versions()  # snapshot at fw=1, dm=1
        s.bump("wireguard")
        updated = s.get_updated_versions()
        assert updated["wireguard"] == 1
        assert s.get_updated_versions() == {}

    def test_multiple_bumps_aggregate(self):
        s = State()
        _ = s.get_updated_versions()
        s.bump("firewall")
        s.bump("firewall")
        s.bump("dnsmasq")
        updated = s.get_updated_versions()
        assert updated["firewall"] == 2
        assert updated["dnsmasq"] == 1