"""Tests for .NET project file extraction (.sln, .csproj, .xaml, .razor)."""
from pathlib import Path
import tempfile
import pytest
from graphify.extract import extract_sln, extract_slnx, extract_csproj, extract_xaml, extract_razor

FIXTURES = Path(__file__).parent / "fixtures"


def _labels(r):
    return [n["label"] for n in r["nodes"]]


def _relations(r):
    return {e["relation"] for e in r["edges"]}


# ── .sln ─────────────────────────────────────────────────────────────────────

def test_sln_extracts_projects():
    r = extract_sln(FIXTURES / "sample.sln")
    assert "error" not in r
    labels = set(_labels(r))
    assert "WebApi" in labels
    assert "Domain" in labels
    assert "Tests" in labels


def test_sln_contains_edges():
    r = extract_sln(FIXTURES / "sample.sln")
    contains = [e for e in r["edges"] if e["relation"] == "contains"]
    assert len(contains) == 3


def test_sln_project_dependency():
    r = extract_sln(FIXTURES / "sample.sln")
    assert "imports" in _relations(r)


# ── .slnx ────────────────────────────────────────────────────────────────────

def test_slnx_extracts_projects():
    r = extract_slnx(FIXTURES / "sample.slnx")
    assert "error" not in r
    labels = set(_labels(r))
    assert "WebApi" in labels
    assert "Domain" in labels
    assert "Tests" in labels


def test_slnx_contains_edges():
    r = extract_slnx(FIXTURES / "sample.slnx")
    contains = [e for e in r["edges"] if e["relation"] == "contains"]
    assert len(contains) == 3


def test_slnx_project_dependency():
    r = extract_slnx(FIXTURES / "sample.slnx")
    assert "imports" in _relations(r)


def test_slnx_invalid_xml():
    with tempfile.NamedTemporaryFile(suffix=".slnx", mode="w", delete=False) as f:
        f.write("<Solution><Project></Solution>")
        f.flush()
        r = extract_slnx(Path(f.name))
    assert "error" in r


def test_slnx_missing_file():
    r = extract_slnx(Path("/nonexistent/file.slnx"))
    assert "error" in r


# ── .csproj ──────────────────────────────────────────────────────────────────

def test_csproj_packages():
    r = extract_csproj(FIXTURES / "sample.csproj")
    assert "error" not in r
    labels = _labels(r)
    assert any("MediatR" in l for l in labels)
    assert any("FluentValidation" in l for l in labels)
    assert any("Swashbuckle" in l for l in labels)


def test_csproj_project_references():
    r = extract_csproj(FIXTURES / "sample.csproj")
    imports = [e for e in r["edges"] if e["relation"] == "imports"]
    assert len(imports) == 6  # 4 packages + 2 project refs


def test_csproj_target_framework():
    r = extract_csproj(FIXTURES / "sample.csproj")
    assert "net8.0" in _labels(r)


def test_csproj_sdk():
    r = extract_csproj(FIXTURES / "sample.csproj")
    assert "Microsoft.NET.Sdk.Web" in _labels(r)


def test_csproj_invalid_xml():
    with tempfile.NamedTemporaryFile(suffix=".csproj", mode="w", delete=False) as f:
        f.write("<Project><Invalid></Project>")
        f.flush()
        r = extract_csproj(Path(f.name))
    assert "error" in r


# ── .xaml ────────────────────────────────────────────────────────────────────

def test_xaml_class_resolves_to_codebehind_partial_class():
    r = extract_xaml(FIXTURES / "sample.xaml")
    assert "error" not in r
    class_nodes = [
        n for n in r["nodes"]
        if n["label"] == "MainWindow" and str(n.get("source_file", "")).endswith("sample.xaml.cs")
    ]
    assert class_nodes
    assert any(
        e["relation"] == "references"
        and e.get("context") == "x_class"
        and e["target"] == class_nodes[0]["id"]
        for e in r["edges"]
    )


def test_xaml_named_controls_and_bindings():
    r = extract_xaml(FIXTURES / "sample.xaml")
    labels = set(_labels(r))
    assert {"RootPanel", "UserNameBox", "SaveButton", "UserName"} <= labels
    assert any(e["relation"] == "references" and e.get("context") == "binding" for e in r["edges"])


def test_xaml_events_resolve_to_codebehind_methods():
    r = extract_xaml(FIXTURES / "sample.xaml")
    method_nodes = {
        n["label"].strip("()").lstrip("."): n["id"]
        for n in r["nodes"]
        if str(n.get("source_file", "")).endswith("sample.xaml.cs")
    }
    assert {"Window_Loaded", "UserNameChanged", "Save_Click"} <= set(method_nodes)
    event_targets = {
        e["target"] for e in r["edges"]
        if e["relation"] == "references" and e.get("context") == "event"
    }
    assert method_nodes["Window_Loaded"] in event_targets
    assert method_nodes["UserNameChanged"] in event_targets
    assert method_nodes["Save_Click"] in event_targets


def _event_targets(r):
    return {e["target"] for e in r["edges"]
            if e["relation"] == "references" and e.get("context") == "event"}


def test_xaml_event_match_requires_handler_signature():
    """A property value that matches an ordinary method's name must not become an
    event edge -- only methods with a (object sender, ...EventArgs e) signature do."""
    xaml = (
        '<Window x:Class="Demo.MainWindow"\n'
        '  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"\n'
        '  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">\n'
        '  <Button Content="Refresh" Click="Refresh"/>\n'
        "</Window>\n"
    )
    cs = (
        "using System.Windows;\n"
        "namespace Demo { public partial class MainWindow : Window {\n"
        "  public void Refresh() {}\n"  # business method, not a handler signature
        "}}\n"
    )
    with tempfile.TemporaryDirectory() as d:
        p = Path(d) / "view.xaml"
        p.write_text(xaml)
        (Path(d) / "view.xaml.cs").write_text(cs)
        r = extract_xaml(p)
    assert "error" not in r
    assert _event_targets(r) == set()


def test_xaml_non_event_attribute_value_does_not_fabricate_event():
    """Content=/Tag= holding a string that equals a real handler's name must not
    create an event edge; only the genuine event attribute (Click) should."""
    xaml = (
        '<Window x:Class="Demo.MainWindow"\n'
        '  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"\n'
        '  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">\n'
        '  <Button x:Name="B1" Content="Save_Click" Tag="OnLoaded" Click="Save_Click"/>\n'
        "</Window>\n"
    )
    cs = (
        "using System.Windows;\n"
        "namespace Demo { public partial class MainWindow : Window {\n"
        "  private void Save_Click(object sender, RoutedEventArgs e) {}\n"
        "  private void OnLoaded(object sender, RoutedEventArgs e) {}\n"
        "}}\n"
    )
    with tempfile.TemporaryDirectory() as d:
        p = Path(d) / "view.xaml"
        p.write_text(xaml)
        (Path(d) / "view.xaml.cs").write_text(cs)
        r = extract_xaml(p)
    handlers = {n["label"].strip("()").lstrip("."): n["id"]
                for n in r["nodes"] if str(n.get("source_file", "")).endswith("view.xaml.cs")}
    targets = _event_targets(r)
    # Click -> Save_Click is the only real event; OnLoaded (referenced only via Tag) is not.
    assert handlers["Save_Click"] in targets
    assert handlers.get("OnLoaded") not in targets
    assert len(targets) == 1


# ── .razor ───────────────────────────────────────────────────────────────────

def test_razor_using_and_inject():
    r = extract_razor(FIXTURES / "sample.razor")
    assert "error" not in r
    targets = {e["target"] for e in r["edges"] if e["relation"] == "imports"}
    assert any("microsoft" in t for t in targets)
    assert any("counterservice" in t.lower() for t in targets)


def test_razor_components():
    r = extract_razor(FIXTURES / "sample.razor")
    targets = {e["target"] for e in r["edges"] if e["relation"] == "calls"}
    assert any("weatherdisplay" in t for t in targets)
    assert any("datagrid" in t for t in targets)


def test_razor_page_route():
    r = extract_razor(FIXTURES / "sample.razor")
    assert any("/counter" in l for l in _labels(r))


def test_razor_inherits():
    r = extract_razor(FIXTURES / "sample.razor")
    assert "inherits" in _relations(r)


def test_razor_code_methods():
    r = extract_razor(FIXTURES / "sample.razor")
    labels = _labels(r)
    assert "IncrementCount" in labels
    assert "LoadData" in labels


def test_razor_missing_file():
    r = extract_razor(Path("/nonexistent/file.razor"))
    assert "error" in r


# ── dispatch & detect integration ────────────────────────────────────────────

def test_dispatch_table():
    from graphify.extract import _get_extractor
    for ext in (".sln", ".slnx", ".csproj", ".fsproj", ".vbproj", ".xaml", ".razor", ".cshtml"):
        assert _get_extractor(Path(f"foo{ext}")) is not None, f"{ext} not in dispatch"


def test_code_extensions():
    from graphify.detect import CODE_EXTENSIONS
    for ext in (".sln", ".slnx", ".csproj", ".fsproj", ".vbproj", ".xaml", ".razor", ".cshtml"):
        assert ext in CODE_EXTENSIONS, f"{ext} missing"