#!/usr/bin/env python3
"""Phase 5.1 Pattern Matcher tests."""

import asyncio
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent / "ontology_platform"))

from ont_platform.core.graph.pattern_matcher import PatternMatcher, PathResult, CycleResult


class MockAdapter:
    """Mock Neo4j adapter for testing."""

    async def execute_cypher(self, cypher: str, params=None):
        """Mock Cypher execution."""
        params = params or {}

        # find_paths
        if "shortestPath" in cypher or "RELATES*" in cypher and "start_id" in params:
            return [
                {
                    "result": {
                        "path": [params.get("start_id"), 2, 3, params.get("end_id")],
                        "length": 3,
                        "confidence": 0.87,
                    }
                },
                {
                    "result": {
                        "path": [params.get("start_id"), 5, params.get("end_id")],
                        "length": 2,
                        "confidence": 0.90,
                    }
                },
            ]

        # find_cycles
        if "start)-[" in cypher or ("RELATES*" in cypher and "end_id" not in params):
            return [
                {"result": {"cycle": [1, 2, 3, 1], "length": 3}},
                {"result": {"cycle": [4, 5, 6, 4], "length": 3}},
            ]

        # find_motifs - detect by type in params
        motif_type = params.get("motif_type", "")
        if motif_type == "triangle":
            return [
                {
                    "result": {
                        "motif_type": "triangle",
                        "nodes": [1, 2, 3],
                        "labels": ["Entity_1", "Entity_2", "Entity_3"],
                    }
                },
                {
                    "result": {
                        "motif_type": "triangle",
                        "nodes": [4, 5, 6],
                        "labels": ["Entity_4", "Entity_5", "Entity_6"],
                    }
                },
            ]

        if motif_type == "chain":
            return [
                {
                    "result": {
                        "motif_type": "chain",
                        "nodes": [1, 2, 3, 4],
                        "labels": ["A", "B", "C", "D"],
                        "length": 4,
                    }
                },
            ]

        if motif_type == "star":
            return [
                {
                    "result": {
                        "motif_type": "star",
                        "hub": 1,
                        "spokes": [2, 3, 4],
                        "hub_label": "Central",
                        "spoke_labels": ["Spoke1", "Spoke2", "Spoke3"],
                    }
                },
            ]

        # analyze_entity_connectivity
        if "in_degree" in cypher:
            return [
                {
                    "metrics": {
                        "entity_id": params.get("entity_id"),
                        "entity_label": f"Entity_{params.get('entity_id')}",
                        "in_degree": 3,
                        "out_degree": 4,
                        "total_degree": 7,
                        "reachable_entities": 12,
                        "reachability_ratio": 0.857,
                    }
                }
            ]

        return []


async def test_find_paths():
    """Test path finding between entities."""
    print("\n[TEST 1] Find Paths")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    paths = await matcher.find_paths(start_entity_id=1, end_entity_id=4, max_length=5)

    assert len(paths) > 0, "Should find at least one path"
    assert all("path" in p and "length" in p for p in paths), "All paths should have required fields"

    shortest = min(paths, key=lambda p: p["length"])
    assert shortest["length"] >= 2, "Path length should be >= 2"

    print(f"  [OK] Found {len(paths)} paths from 1 to 4")
    print(f"  [OK] Shortest path: {shortest['path']} (length {shortest['length']})")
    print(f"  [OK] Average confidence: {sum(p['confidence'] for p in paths) / len(paths):.3f}")
    print("  [PASS]")


async def test_same_entity_path():
    """Test path from entity to itself."""
    print("\n[TEST 2] Same Entity Path")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    paths = await matcher.find_paths(start_entity_id=1, end_entity_id=1, max_length=5)

    assert len(paths) == 1, "Should return single path to itself"
    assert paths[0]["path"] == [1], "Path should be entity itself"
    assert paths[0]["length"] == 0, "Length to itself should be 0"
    assert paths[0]["confidence"] == 1.0, "Confidence should be 1.0"

    print("  [OK] Path to self: [1], length 0, confidence 1.0")
    print("  [PASS]")


async def test_find_cycles():
    """Test cycle detection."""
    print("\n[TEST 3] Find Cycles")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    cycles = await matcher.find_cycles(min_length=2, max_length=5)

    assert len(cycles) > 0, "Should find cycles"
    assert all(
        "cycle" in c and "length" in c and c["length"] > 1 for c in cycles
    ), "All cycles should have required fields"

    print(f"  [OK] Found {len(cycles)} cycles")
    for i, cycle in enumerate(cycles, 1):
        print(f"       Cycle {i}: {cycle['cycle']} (length {cycle['length']})")
    print("  [PASS]")


async def test_find_motifs_triangle():
    """Test triangle motif detection."""
    print("\n[TEST 4] Find Motifs (Triangle)")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    motifs = await matcher.find_motifs(motif_type="triangle", limit=100)

    assert len(motifs) > 0, "Should find triangle motifs"
    assert all(m.get("motif_type") == "triangle" for m in motifs), "All should be triangles"

    print(f"  [OK] Found {len(motifs)} triangle motifs")
    for motif in motifs:
        print(f"       Triangle: {motif['nodes']}")
    print("  [PASS]")


async def test_find_motifs_chain():
    """Test chain motif detection."""
    print("\n[TEST 5] Find Motifs (Chain)")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    motifs = await matcher.find_motifs(motif_type="chain", limit=100)

    assert len(motifs) >= 0, "Should return chain motifs (may be empty)"
    if motifs:
        assert all(m.get("motif_type") == "chain" for m in motifs), "All should be chains"
        print(f"  [OK] Found {len(motifs)} chain motifs")

    print("  [PASS]")


async def test_find_motifs_star():
    """Test star motif detection."""
    print("\n[TEST 6] Find Motifs (Star)")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    motifs = await matcher.find_motifs(motif_type="star", limit=100)

    assert len(motifs) >= 0, "Should return star motifs (may be empty)"
    if motifs:
        assert all(m.get("motif_type") == "star" for m in motifs), "All should be stars"
        assert all("hub" in m for m in motifs), "Stars should have hub"
        assert all("spokes" in m for m in motifs), "Stars should have spokes"
        print(f"  [OK] Found {len(motifs)} star motifs")
        for motif in motifs:
            print(f"       Hub: {motif['hub']}, Spokes: {motif['spokes']}")

    print("  [PASS]")


async def test_find_motifs_invalid():
    """Test invalid motif type."""
    print("\n[TEST 7] Invalid Motif Type")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    result = await matcher.find_motifs(motif_type="invalid", limit=100)

    assert isinstance(result, dict) and "error" in result, "Should return error for invalid motif"
    print(f"  [OK] Correctly rejects invalid motif: {result['error']}")
    print("  [PASS]")


async def test_analyze_entity_connectivity():
    """Test entity connectivity analysis."""
    print("\n[TEST 8] Entity Connectivity Analysis")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    metrics = await matcher.analyze_entity_connectivity(entity_id=1)

    assert "in_degree" in metrics, "Should have in_degree"
    assert "out_degree" in metrics, "Should have out_degree"
    assert "total_degree" in metrics, "Should have total_degree"
    assert "reachable_entities" in metrics, "Should have reachable_entities"

    assert metrics["total_degree"] == metrics["in_degree"] + metrics["out_degree"]
    print(f"  [OK] Entity 1 metrics:")
    print(f"       In-degree: {metrics['in_degree']}")
    print(f"       Out-degree: {metrics['out_degree']}")
    print(f"       Total degree: {metrics['total_degree']}")
    print(f"       Reachable entities: {metrics['reachable_entities']}")
    print(f"       Reachability ratio: {metrics['reachability_ratio']:.3f}")
    print("  [PASS]")


async def test_path_validation():
    """Test path length validation."""
    print("\n[TEST 9] Path Length Validation")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    try:
        await matcher.find_paths(start_entity_id=1, end_entity_id=2, max_length=0)
        assert False, "Should reject max_length < 2"
    except ValueError as e:
        assert "max_length must be between 2 and 6" in str(e)
        print("  [OK] Correctly rejects max_length < 2")

    try:
        await matcher.find_paths(start_entity_id=1, end_entity_id=2, max_length=7)
        assert False, "Should reject max_length > 6"
    except ValueError as e:
        assert "max_length must be between 2 and 6" in str(e)
        print("  [OK] Correctly rejects max_length > 6")

    print("  [PASS]")


async def test_cycle_validation():
    """Test cycle detection validation."""
    print("\n[TEST 10] Cycle Detection Validation")

    adapter = MockAdapter()
    matcher = PatternMatcher(adapter)

    try:
        await matcher.find_cycles(min_length=1)
        assert False, "Should reject min_length < 2"
    except ValueError as e:
        assert "min_length must be >= 2" in str(e)
        print("  [OK] Correctly rejects min_length < 2")

    try:
        await matcher.find_cycles(min_length=5, max_length=3)
        assert False, "Should reject max_length < min_length"
    except ValueError as e:
        assert "max_length must be between min_length and 6" in str(e)
        print("  [OK] Correctly rejects max_length < min_length")

    print("  [PASS]")


async def main():
    """Run all tests."""
    print("=" * 70)
    print("Phase 5.1 Pattern Matcher Tests")
    print("=" * 70)

    try:
        await test_find_paths()
        await test_same_entity_path()
        await test_find_cycles()
        await test_find_motifs_triangle()
        await test_find_motifs_chain()
        await test_find_motifs_star()
        await test_find_motifs_invalid()
        await test_analyze_entity_connectivity()
        await test_path_validation()
        await test_cycle_validation()

        print("\n" + "=" * 70)
        print("All tests passed!")
        print("=" * 70)
        print("\nPhase 5.1 Pattern Matcher capabilities:")
        print("  [OK] Path finding between entities")
        print("  [OK] Cycle detection")
        print("  [OK] Motif detection (triangle, chain, star)")
        print("  [OK] Entity connectivity analysis")
        print("  [OK] Input validation")

        return True
    except AssertionError as e:
        print(f"\nTest failed: {e}")
        import traceback

        traceback.print_exc()
        return False
    except Exception as e:
        print(f"\nUnexpected error: {e}")
        import traceback

        traceback.print_exc()
        return False


if __name__ == "__main__":
    success = asyncio.run(main())
    sys.exit(0 if success else 1)