import sys
import os
import time
import subprocess

# Add project root to sys.path
project_root = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
sys.path.insert(0, project_root)

from src.lyricflow_core.engine.rhyme_engine import RhymeEngine

def test_engine_bridge():
    # 1. Start backend
    backend_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'LyricFlow.Core.Backend', 'LyricFlow.Backend.Api'))
    print(f"Starting backend from {backend_path}...")
    
    proc = subprocess.Popen(
        ["dotnet", "run", "--project", backend_path, "--urls", "http://localhost:5000"],
        stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
        creationflags=subprocess.CREATE_NO_WINDOW if os.name == 'nt' else 0
    )
    
    engine = RhymeEngine()
    
    # Wait for backend to start
    print("Waiting for backend for engine tests...")
    max_retries = 30
    success = False
    for i in range(max_retries):
        if engine.bridge.is_alive():
            print(f"Backend is alive (attempt {i+1})!")
            success = True
            break
        time.sleep(1)
    
    if not success:
        print("Backend failed to start.")
        proc.terminate()
        return

    try:
        # 2. Test Syllables
        print("\nTesting syllable counting...")
        words = ["rap", "lyrical", "gravitation", "sky"]
        for w in words:
            syl = engine.count_syllables(w)
            print(f"'{w}': {syl} syllables")

        # 3. Test Rhyme Suggestions
        print("\nTesting rhyme suggestions...")
        test_word = "flow"
        rhymes = engine.find_suggestions(test_word)
        print(f"Rhymes for '{test_word}': {len(rhymes['perfect'])} perfect, {len(rhymes['slant'])} slant")
        if rhymes['perfect']:
             print(f"Perfect example: {rhymes['perfect'][0]}")

        # 4. Test Line Densities (Heavy processing)
        print("\nTesting line density batch processing...")
        test_text = """
        I'm the lyrical miracle, spiritual individual
        In the physical world, it's getting critical
        My rhymes are mystical, highly statistical
        You're just typical, completely satirical
        """
        start_time = time.time()
        densities = engine.get_line_densities(test_text)
        end_time = time.time()
        
        print(f"Line densities: {[round(d, 2) for d in densities]}")
        print(f"Processing time (Batch C#): {end_time - start_time:.4f}s")

    finally:
        print("\nTerminating backend...")
        proc.terminate()

if __name__ == "__main__":
    test_engine_bridge()