import pytest
import time
import sys
import os
import shutil
import tempfile
from pathlib import Path

sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "src")))

from src import api_hook_client

@pytest.mark.integration
def test_rag_large_codebase_verification_sim(live_gui):
 client = api_hook_client.ApiHookClient()
 assert client.wait_for_server(timeout=15), "Hook server did not start"
 
 # 1. Setup mock large project data
 # Create 50 dummy files to test parallel indexing and incrementality
 workspace_dir = Path("tests/artifacts/live_gui_workspace")
 workspace_dir.mkdir(parents=True, exist_ok=True)
 
 file_names = [f"file_{i}.txt" for i in range(50)]
 for name in file_names:
  (workspace_dir / name).write_text(f"This is the content of {name}. It contains unique tokens to verify RAG.")

 try:
  # 2. Configure project through Hook API
  client.set_value('files', file_names)
  client.set_value('rag_enabled', True)
  client.set_value('rag_source', 'chroma')
  client.set_value('rag_emb_provider', 'local')
  
  # 3. Trigger Initial Indexing
  print("[SIM] Triggering initial indexing of 50 files...")
  start = time.time()
  client.click('btn_rebuild_rag_index')
  
  # Wait for ready
  success = False
  for _ in range(100):
   status = client.get_value('rag_status')
   if status == 'ready':
    success = True
    break
   time.sleep(0.5)
  
  duration_initial = time.time() - start
  assert success, f"Initial indexing timed out. Final status: {status}"
  print(f"[SIM] Initial indexing took {duration_initial:.2f}s")
  
  # 4. Trigger Incremental Indexing (no changes)
  print("[SIM] Triggering incremental indexing (no changes)...")
  start = time.time()
  client.click('btn_rebuild_rag_index')
  
  success = False
  for _ in range(50):
   status = client.get_value('rag_status')
   if status == 'ready':
    success = True
    break
   time.sleep(0.2)
  
  duration_incremental = time.time() - start
  assert success, "Incremental indexing timed out"
  print(f"[SIM] Incremental indexing took {duration_incremental:.2f}s")
  # Incremental should be significantly faster
  assert duration_incremental < duration_initial, f"Incremental ({duration_incremental:.2f}s) not faster than initial ({duration_initial:.2f}s)"
  
  # 5. Modify one file and re-index
  print("[SIM] Modifying one file and re-indexing...")
  (workspace_dir / "file_25.txt").write_text("MODIFIED CONTENT FOR FILE 25. SEARCH FOR THIS.")
  
  client.click('btn_rebuild_rag_index')
  time.sleep(2) # Wait for it to finish
  
  # 6. Verify retrieval of modified content
  client.set_value('current_provider', 'gemini_cli')
  client.set_value('gcli_path', os.path.abspath(os.path.join(os.path.dirname(__file__), "mock_gcli.bat")))
  client.set_value('auto_add_history', True)
  client.set_value('ai_input', "What is the modified content?")
  client.click('btn_gen_send')
  
  # Wait for completion
  success = False
  for _ in range(50):
   state = client.get_gui_state()
   if state.get('ai_status') == 'done':
    success = True
    break
   time.sleep(0.5)
  
  assert success, "AI request timed out"
  
  # Verify retrieved context in discussion
  session = client.get_session()
  entries = session.get('session', {}).get('entries', [])
  
  found_mod = False
  for entry in entries:
   if entry.get('role') == 'User' and 'MODIFIED CONTENT FOR FILE 25' in entry.get('content', ''):
    found_mod = True
    break
  
  assert found_mod, "Modified context not found in discussion"
  print("[SIM] Modified content retrieval SUCCESS.")

  # 7. Delete files and verify cleanup
  print("[SIM] Deleting files and verifying cleanup...")
  files_to_keep = file_names[:10]
  client.set_value('files', files_to_keep)
  client.click('btn_rebuild_rag_index')
  time.sleep(2)
  
  # How to verify cleanup? RAGEngine.get_all_indexed_paths is not exposed yet.
  # But we can verify by searching for a deleted file's content.
  client.set_value('ai_input', "What is in file_49.txt?")
  client.click('btn_gen_send')
  time.sleep(5)
  
  session = client.get_session()
  entries = session.get('session', {}).get('entries', [])
  
  # Last User message should NOT contain context from file_49
  last_user = next(e for e in reversed(entries) if e.get('role') == 'User')
  content = last_user.get('content', '')
  
  # Check if "Source: file_49.txt" exists in the context block
  # (which is prepended to the user input)
  has_stale_context = "Source: file_49.txt" in content
  assert not has_stale_context, f"Cleanup failed: stale file context found in: {content[:100]}..."
  
  print("[SIM] Large codebase verification PASSED.")
  
 except Exception as e:
  print(f"[SIM] Error in stress test: {e}")
  raise