"""
Tests for dependency_graph — cross-repo dependency analysis.
"""

import json
import tempfile
import unittest
from pathlib import Path
import sys

# Make scripts importable
sys.path.insert(0, str(Path(__file__).parent.parent / "scripts"))

from dependency_graph import (
    normalize_repo_name,
    scan_file_for_deps,
    detect_cycles,
    scan_repo,
)


class TestNormalizeRepoName(unittest.TestCase):
    def test_lowercase(self):
        self.assertEqual(normalize_repo_name("Hermes-Agent"), "hermes-agent")

    def test_underscore_to_hyphen(self):
        self.assertEqual(normalize_repo_name("timmy_config"), "timmy-config")

    def test_strip_git(self):
        self.assertEqual(normalize_repo_name("the-nexus.git"), "the-nexus")


class TestScanFileForDeps(unittest.TestCase):
    def test_python_import(self):
        content = "from hermes_agent.tools import something"
        deps = scan_file_for_deps("dummy.py", content, "my-repo")
        self.assertIn("hermes-agent", deps)

    def test_python_import_from(self):
        content = "import timmy_config.helpers"
        deps = scan_file_for_deps("dummy.py", content, "my-repo")
        self.assertIn("timmy-config", deps)

    def test_js_require(self):
        content = 'const utils = require("the-nexus/utils");'
        deps = scan_file_for_deps("dummy.js", content, "my-repo")
        self.assertIn("the-nexus", deps)

    def test_es6_import(self):
        content = 'import {something} from "fleet-ops";'
        deps = scan_file_for_deps("dummy.ts", content, "my-repo")
        self.assertIn("fleet-ops", deps)

    def test_go_import(self):
        content = 'import "github.com/Timmy_Foundation/the-door/pkg"'
        deps = scan_file_for_deps("dummy.go", content, "my-repo")
        self.assertIn("the-door", deps)

    def test_ansible_include_role(self):
        content = "- include_role:\n    name: timmy-home.nginx"
        deps = scan_file_for_deps("dummy.yml", content, "my-repo")
        self.assertIn("timmy-home", deps)

    def test_yaml_repo_reference(self):
        content = "repo: the-beacon\\ntrigger: push"
        deps = scan_file_for_deps("dummy.yaml", content, "my-repo")
        self.assertIn("the-beacon", deps)

    def test_exclude_self_reference(self):
        content = "import hermes_agent"
        deps = scan_file_for_deps("dummy.py", content, "hermes-agent")
        self.assertNotIn("hermes-agent", deps)

    def test_no_deps(self):
        content = "# no imports here"
        deps = scan_file_for_deps("dummy.py", content, "my-repo")
        self.assertEqual(len(deps), 0)


class TestDetectCycles(unittest.TestCase):
    def test_no_cycles(self):
        graph = {
            "A": {"dependencies": ["B"]},
            "B": {"dependencies": ["C"]},
            "C": {"dependencies": []},
        }
        cycles = detect_cycles(graph)
        self.assertEqual(cycles, [])

    def test_simple_cycle(self):
        graph = {
            "A": {"dependencies": ["B"]},
            "B": {"dependencies": ["A"]},
        }
        cycles = detect_cycles(graph)
        self.assertEqual(len(cycles), 1)
        self.assertIn("A", cycles[0])
        self.assertIn("B", cycles[0])

    def test_three_node_cycle(self):
        graph = {
            "A": {"dependencies": ["B"]},
            "B": {"dependencies": ["C"]},
            "C": {"dependencies": ["A"]},
        }
        cycles = detect_cycles(graph)
        self.assertEqual(len(cycles), 1)
        self.assertEqual(set(cycles[0]), {"A", "B", "C"})

    def test_multiple_independent_cycles(self):
        graph = {
            "A": {"dependencies": ["B"]},
            "B": {"dependencies": ["A"]},
            "C": {"dependencies": ["D"]},
            "D": {"dependencies": ["C"]},
        }
        cycles = detect_cycles(graph)
        self.assertEqual(len(cycles), 2)

    def test_self_cycle(self):
        graph = {
            "A": {"dependencies": ["A"]},
        }
        cycles = detect_cycles(graph)
        self.assertEqual(len(cycles), 1)
        self.assertEqual(cycles[0], ["A"])


class TestScanRepo(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()
        self.repo_path = Path(self.tmpdir) / "test-repo"
        self.repo_path.mkdir()

    def tearDown(self):
        import shutil
        shutil.rmtree(self.tmpdir)

    def test_scan_simple_import(self):
        # Create a Python file that imports another known repo
        (self.repo_path / "main.py").write_text("from hermes_agent import tools")
        result = scan_repo(str(self.repo_path), "test-repo")
        self.assertIn("dependencies", result)
        self.assertIn("hermes-agent", result["dependencies"])
        self.assertEqual(result["files_scanned"], 1)

    def test_scan_multiple_files(self):
        (self.repo_path / "a.py").write_text("import timmy_config")
        (self.repo_path / "b.js").write_text('require("the-nexus")')
        (self.repo_path / "c.yml").write_text("include_role: fleet-ops")
        result = scan_repo(str(self.repo_path), "test-repo")
        deps = set(result["dependencies"])
        self.assertIn("timmy-config", deps)
        self.assertIn("the-nexus", deps)
        self.assertIn("fleet-ops", deps)
        self.assertEqual(result["files_scanned"], 3)


class TestIntegration(unittest.TestCase):
    """Integration test using real test_repos directory."""

    def test_scan_timmy_config(self):
        repo_root = Path(__file__).parent.parent
        test_repos_dir = repo_root / "test_repos"
        if not test_repos_dir.exists():
            self.skipTest("test_repos directory not found (needs cloning)")

        # The timmy-config repo fixture exists
        tc = test_repos_dir / "timmy-config"
        if not tc.exists():
            self.skipTest("timmy-config not cloned")

        result = scan_repo(str(tc), "timmy-config")
        deps = set(result.get("dependencies", []))
        # timmy-config dependencies based on known codebase
        expected = {"hermes-agent", "the-nexus", "fleet-ops"}
        # At least some deps should be found
        self.assertGreater(len(deps), 0, "Should find at least one dependency")
        # Cross-check: hermes-agent definitely used
        self.assertIn("hermes-agent", deps)


if __name__ == "__main__":
    unittest.main()