"""Tests for language extractors: Java, C, C++, Ruby, C#, Kotlin, Scala, PHP, Swift."""
from __future__ import annotations
from pathlib import Path
import pytest
from graphify.extract import (
    extract_java, extract_c, extract_cpp, extract_ruby,
    extract_csharp, extract_kotlin, extract_scala, extract_php,
    extract_swift,
)

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"]}

def _calls(r):
    node_by_id = {n["id"]: n["label"] for n in r["nodes"]}
    return {
        (node_by_id.get(e["source"], e["source"]), node_by_id.get(e["target"], e["target"]))
        for e in r["edges"] if e["relation"] == "calls"
    }


# ── Java ──────────────────────────────────────────────────────────────────────

def test_java_no_error():
    r = extract_java(FIXTURES / "sample.java")
    assert "error" not in r

def test_java_finds_class():
    r = extract_java(FIXTURES / "sample.java")
    assert any("DataProcessor" in l for l in _labels(r))

def test_java_finds_interface():
    r = extract_java(FIXTURES / "sample.java")
    assert any("Processor" in l for l in _labels(r))

def test_java_finds_methods():
    r = extract_java(FIXTURES / "sample.java")
    labels = _labels(r)
    assert any("addItem" in l for l in labels)
    assert any("process" in l for l in labels)

def test_java_finds_imports():
    r = extract_java(FIXTURES / "sample.java")
    assert "imports" in _relations(r)

def test_java_no_dangling_edges():
    r = extract_java(FIXTURES / "sample.java")
    node_ids = {n["id"] for n in r["nodes"]}
    for e in r["edges"]:
        assert e["source"] in node_ids


# ── C ────────────────────────────────────────────────────────────────────────

def test_c_no_error():
    r = extract_c(FIXTURES / "sample.c")
    assert "error" not in r

def test_c_finds_functions():
    r = extract_c(FIXTURES / "sample.c")
    labels = _labels(r)
    assert any("process" in l for l in labels)
    assert any("main" in l for l in labels)

def test_c_finds_includes():
    r = extract_c(FIXTURES / "sample.c")
    assert "imports" in _relations(r)

def test_c_emits_calls():
    r = extract_c(FIXTURES / "sample.c")
    assert any(e["relation"] == "calls" for e in r["edges"])

def test_c_calls_are_inferred():
    r = extract_c(FIXTURES / "sample.c")
    for e in r["edges"]:
        if e["relation"] == "calls":
            assert e["confidence"] == "INFERRED"


# ── C++ ───────────────────────────────────────────────────────────────────────

def test_cpp_no_error():
    r = extract_cpp(FIXTURES / "sample.cpp")
    assert "error" not in r

def test_cpp_finds_class():
    r = extract_cpp(FIXTURES / "sample.cpp")
    assert any("HttpClient" in l for l in _labels(r))

def test_cpp_finds_methods():
    r = extract_cpp(FIXTURES / "sample.cpp")
    labels = _labels(r)
    # C++ extractor captures the constructor and public-visible methods
    assert any("HttpClient" in l for l in labels)

def test_cpp_finds_includes():
    r = extract_cpp(FIXTURES / "sample.cpp")
    assert "imports" in _relations(r)


# ── Ruby ─────────────────────────────────────────────────────────────────────

def test_ruby_no_error():
    r = extract_ruby(FIXTURES / "sample.rb")
    assert "error" not in r

def test_ruby_finds_class():
    r = extract_ruby(FIXTURES / "sample.rb")
    assert any("ApiClient" in l for l in _labels(r))

def test_ruby_finds_methods():
    r = extract_ruby(FIXTURES / "sample.rb")
    labels = _labels(r)
    assert any("get" in l for l in labels)
    assert any("post" in l for l in labels)

def test_ruby_finds_function():
    r = extract_ruby(FIXTURES / "sample.rb")
    assert any("parse_response" in l for l in _labels(r))


# ── C# ───────────────────────────────────────────────────────────────────────

def test_csharp_no_error():
    r = extract_csharp(FIXTURES / "sample.cs")
    assert "error" not in r

def test_csharp_finds_class():
    r = extract_csharp(FIXTURES / "sample.cs")
    assert any("DataProcessor" in l for l in _labels(r))

def test_csharp_finds_interface():
    r = extract_csharp(FIXTURES / "sample.cs")
    assert any("IProcessor" in l for l in _labels(r))

def test_csharp_finds_methods():
    r = extract_csharp(FIXTURES / "sample.cs")
    labels = _labels(r)
    assert any("Process" in l for l in labels)

def test_csharp_finds_usings():
    r = extract_csharp(FIXTURES / "sample.cs")
    assert "imports" in _relations(r)


# ── Kotlin ───────────────────────────────────────────────────────────────────

def test_kotlin_no_error():
    r = extract_kotlin(FIXTURES / "sample.kt")
    assert "error" not in r

def test_kotlin_finds_class():
    r = extract_kotlin(FIXTURES / "sample.kt")
    assert any("HttpClient" in l for l in _labels(r))

def test_kotlin_finds_data_class():
    r = extract_kotlin(FIXTURES / "sample.kt")
    assert any("Config" in l for l in _labels(r))

def test_kotlin_finds_methods():
    r = extract_kotlin(FIXTURES / "sample.kt")
    labels = _labels(r)
    assert any("get" in l for l in labels)
    assert any("post" in l for l in labels)

def test_kotlin_finds_function():
    r = extract_kotlin(FIXTURES / "sample.kt")
    assert any("createClient" in l for l in _labels(r))


# ── Scala ─────────────────────────────────────────────────────────────────────

def test_scala_no_error():
    r = extract_scala(FIXTURES / "sample.scala")
    assert "error" not in r

def test_scala_finds_class():
    r = extract_scala(FIXTURES / "sample.scala")
    assert any("HttpClient" in l for l in _labels(r))

def test_scala_finds_object():
    r = extract_scala(FIXTURES / "sample.scala")
    assert any("HttpClientFactory" in l for l in _labels(r))

def test_scala_finds_methods():
    r = extract_scala(FIXTURES / "sample.scala")
    labels = _labels(r)
    assert any("get" in l for l in labels)
    assert any("post" in l for l in labels)


# ── PHP ───────────────────────────────────────────────────────────────────────

def test_php_no_error():
    r = extract_php(FIXTURES / "sample.php")
    assert "error" not in r

def test_php_finds_class():
    r = extract_php(FIXTURES / "sample.php")
    assert any("ApiClient" in l for l in _labels(r))

def test_php_finds_methods():
    r = extract_php(FIXTURES / "sample.php")
    labels = _labels(r)
    assert any("get" in l for l in labels)
    assert any("post" in l for l in labels)

def test_php_finds_function():
    r = extract_php(FIXTURES / "sample.php")
    assert any("parseResponse" in l for l in _labels(r))

def test_php_finds_imports():
    r = extract_php(FIXTURES / "sample.php")
    assert "imports" in _relations(r)


# ── Swift ────────────────────────────────────────────────────────────────────

def test_swift_no_error():
    r = extract_swift(FIXTURES / "sample.swift")
    assert "error" not in r

def test_swift_finds_class():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("DataProcessor" in l for l in _labels(r))

def test_swift_finds_protocol():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("Processor" in l for l in _labels(r))

def test_swift_finds_struct():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("Config" in l for l in _labels(r))

def test_swift_finds_methods():
    r = extract_swift(FIXTURES / "sample.swift")
    labels = _labels(r)
    assert any("addItem" in l for l in labels)
    assert any("process" in l for l in labels)

def test_swift_finds_function():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("createProcessor" in l for l in _labels(r))

def test_swift_finds_imports():
    r = extract_swift(FIXTURES / "sample.swift")
    assert "imports" in _relations(r)

def test_swift_no_dangling_edges():
    r = extract_swift(FIXTURES / "sample.swift")
    node_ids = {n["id"] for n in r["nodes"]}
    for e in r["edges"]:
        assert e["source"] in node_ids

def test_swift_finds_actor():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("CacheManager" in l for l in _labels(r))

def test_swift_finds_enum():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("NetworkError" in l for l in _labels(r))

def test_swift_finds_enum_methods():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("describe" in l for l in _labels(r))

def test_swift_finds_enum_cases():
    r = extract_swift(FIXTURES / "sample.swift")
    labels = _labels(r)
    assert any("timeout" in l for l in labels)
    assert any("connectionFailed" in l for l in labels)

def test_swift_enum_cases_have_case_of_edge():
    r = extract_swift(FIXTURES / "sample.swift")
    case_edges = [e for e in r["edges"] if e["relation"] == "case_of"]
    assert len(case_edges) >= 2

def test_swift_finds_deinit():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("deinit" in l for l in _labels(r))

def test_swift_finds_subscript():
    r = extract_swift(FIXTURES / "sample.swift")
    assert any("subscript" in l for l in _labels(r))

def test_swift_extension_methods_attach_to_type():
    r = extract_swift(FIXTURES / "sample.swift")
    node_by_id = {n["id"]: n["label"] for n in r["nodes"]}
    method_edges = [e for e in r["edges"] if e["relation"] == "method"]
    found = False
    for e in method_edges:
        src_label = node_by_id.get(e["source"], "")
        tgt_label = node_by_id.get(e["target"], "")
        if "Config" in src_label and "isValid" in tgt_label:
            found = True
            break
    assert found, "extension method isValid should attach to Config"

def test_swift_extension_does_not_duplicate_type_node():
    r = extract_swift(FIXTURES / "sample.swift")
    config_nodes = [n for n in r["nodes"] if n["label"] == "Config"]
    assert len(config_nodes) == 1, f"Config should appear once, got {len(config_nodes)}"

def test_swift_conformance_edge():
    r = extract_swift(FIXTURES / "sample.swift")
    inherits_edges = [e for e in r["edges"] if e["relation"] == "inherits"]
    node_by_id = {n["id"]: n["label"] for n in r["nodes"]}
    found = False
    for e in inherits_edges:
        src_label = node_by_id.get(e["source"], "")
        tgt_label = node_by_id.get(e["target"], "")
        if "DataProcessor" in src_label and "Processor" in tgt_label:
            found = True
            break
    assert found, "DataProcessor should have inherits edge to Processor"

def test_swift_extension_conformance_edge():
    r = extract_swift(FIXTURES / "sample.swift")
    inherits_edges = [e for e in r["edges"] if e["relation"] == "inherits"]
    node_by_id = {n["id"]: n["label"] for n in r["nodes"]}
    found = False
    for e in inherits_edges:
        src_label = node_by_id.get(e["source"], "")
        tgt_label = node_by_id.get(e["target"], "")
        if "DataProcessor" in src_label and "Loggable" in tgt_label:
            found = True
            break
    assert found, "extension should add conformance edge DataProcessor -> Loggable"

def test_swift_emits_calls():
    r = extract_swift(FIXTURES / "sample.swift")
    calls = _calls(r)
    assert any("process" in src and "validate" in tgt for src, tgt in calls)