import tempfile
import json
from pathlib import Path
from src.parsers.python import PythonParser
from src.parsers.javascript import JavaScriptParser
from src.graph.builder import GraphBuilder, GraphType
from src.analyzers.complexity import ComplexityCalculator
from src.exporters.json_exporter import JSONExporter


class TestFullWorkflow:
    def test_python_file_analysis(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            test_file = Path(tmpdir) / "test.py"
            test_file.write_text("""
def hello(name):
    if name:
        print(f"Hello, {name}")
    else:
        print("Hello, World")

class Greeter:
    def __init__(self, prefix):
        self.prefix = prefix

    def greet(self, name):
        if self.prefix and name:
            return f"{self.prefix} {name}"
        return "Hello"
""")

            parser = PythonParser()
            content = test_file.read_text()
            result = parser.parse(test_file, content)

            assert result.language == "python"
            assert len(result.entities) >= 2
            assert any(e.name == "hello" for e in result.entities)
            assert any(e.name == "Greeter" for e in result.entities)

    def test_javascript_file_analysis(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            test_file = Path(tmpdir) / "test.js"
            test_file.write_text("""
function calculate(a, b) {
    if (a > 0 && b > 0) {
        return a + b;
    }
    return 0;
}

class Calculator {
    constructor() {
        this.value = 0;
    }

    add(num) {
        this.value += num;
        return this.value;
    }
}
""")

            parser = JavaScriptParser()
            content = test_file.read_text()
            result = parser.parse(test_file, content)

            assert result.language == "javascript"
            assert len(result.entities) >= 2

    def test_graph_construction(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            file1 = Path(tmpdir) / "main.py"
            file1.write_text("""
from utils import helper

def main():
    helper()
""")

            file2 = Path(tmpdir) / "utils.py"
            file2.write_text("""
def helper():
    print("Helper")
""")

            builder = GraphBuilder(GraphType.DIRECTED)

            parser = PythonParser()
            results = []
            for file_path in [file1, file2]:
                content = file_path.read_text()
                result = parser.parse(file_path, content)
                results.append(result)

            builder.build_from_parser_results(results)
            nodes = builder.get_nodes()

            assert len(nodes) >= 2

    def test_complexity_calculation(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            test_file = Path(tmpdir) / "test.py"
            test_file.write_text("""
def complex_function(x, y, z):
    if x > 0:
        if y > 0:
            for i in range(z):
                if i % 2 == 0:
                    print(i)
    return True
""")

            parser = PythonParser()
            content = test_file.read_text()
            result = parser.parse(test_file, content)

            calculator = ComplexityCalculator()

            for entity in result.entities:
                complexity = calculator.calculate_for_entity(entity)
                assert complexity["complexity_score"] >= 1

    def test_json_export(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            test_file = Path(tmpdir) / "test.py"
            test_file.write_text("""
def simple():
    pass
""")

            parser = PythonParser()
            content = test_file.read_text()
            result = parser.parse(test_file, content)

            builder = GraphBuilder(GraphType.DIRECTED)
            builder.build_from_parser_results([result])

            exporter = JSONExporter(builder)

            output_file = Path(tmpdir) / "output.json"
            exporter.export(output_file)

            assert output_file.exists()
            data = json.loads(output_file.read_text())
            assert "nodes" in data
            assert "edges" in data

    def test_multi_file_project_analysis(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            (Path(tmpdir) / "main.py").write_text("""
from module_a import func_a
from module_b import func_b

def main():
    func_a()
    func_b()
""")

            (Path(tmpdir) / "module_a.py").write_text("""
def func_a():
    pass

class ClassA:
    pass
""")

            (Path(tmpdir) / "module_b.py").write_text("""
def func_b():
    pass
""")

            parser = PythonParser()
            results = []

            for py_file in Path(tmpdir).glob("*.py"):
                content = py_file.read_text()
                result = parser.parse(py_file, content)
                results.append(result)

            builder = GraphBuilder(GraphType.DIRECTED)
            builder.build_from_parser_results(results)

            nodes = builder.get_nodes()
            assert len(nodes) >= 3

            file_nodes = [n for n in nodes if n.node_type.value == "file"]
            func_nodes = [n for n in nodes if n.node_type.value == "function"]

            assert len(file_nodes) == 3
            assert len(func_nodes) >= 3

    def test_error_handling_invalid_file(self):
        parser = PythonParser()
        result = parser.parse(Path("/nonexistent/file.py"), "")

        assert result.errors is not None

    def test_empty_code_handling(self):
        with tempfile.TemporaryDirectory() as tmpdir:
            test_file = Path(tmpdir) / "empty.py"
            test_file.write_text("# Just a comment\n")

            parser = PythonParser()
            content = test_file.read_text()
            result = parser.parse(test_file, content)

            assert result.language == "python"