import subprocess
import asyncio
from sqlalchemy.orm import Session
from . import crud, models, database
from .socket_manager import manager
import json
import os
import time
import shutil

# In Docker, scripts are in /app/scripts
# But for local testing, we might need a relative path or env var.
# We'll stick to the Docker path assumption or use relative.
SCRIPTS_DIR = os.getenv("SCRIPTS_DIR", "scripts")

def get_scenarios(branch_name: str):
    try:
        # In a real scenario, we might need to git checkout first.
        # For now, just run the script.
        # Ensure we are running from the root of the backend if using relative paths
        script_path = os.path.join(os.getcwd(), SCRIPTS_DIR, "get_scenarios.sh")
        if not os.path.exists(script_path):
             # Fallback for docker absolute path
             script_path = f"/app/scripts/get_scenarios.sh"

        result = subprocess.run(
            [script_path, branch_name],
            capture_output=True,
            text=True,
            check=True
        )
        # Expecting JSON output from script
        return json.loads(result.stdout)
    except subprocess.CalledProcessError as e:
        print(f"Error getting scenarios: {e.stderr}")
        return []
    except Exception as e:
        print(f"Error: {e}")
        return []

async def run_job_task(job_id: int):
    db = database.SessionLocal()
    try:
        job = crud.get_job(db, job_id)
        if not job:
            return

        crud.update_job_status(db, job_id, "running")
        await manager.broadcast(json.dumps({"type": "job_update", "job_id": job_id, "status": "running"}))

        # Run the script
        # run_tests.sh <branch> <scenarios_json> <env> <mode> <job_id>
        scenarios_str = json.dumps(job.scenarios)
        
        script_path = os.path.join(os.getcwd(), SCRIPTS_DIR, "run_tests.sh")
        if not os.path.exists(script_path):
             script_path = f"/app/scripts/run_tests.sh"

        process = await asyncio.create_subprocess_exec(
            script_path,
            job.branch_name,
            scenarios_str,
            job.environment,
            job.test_mode,
            str(job_id),
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.PIPE
        )

        stdout, stderr = await process.communicate()

        if process.returncode == 0:
            # Assume script generates index.html at /results/{job_id}/index.html
            # We need to map where the script writes.
            # For now, let's assume the script handles the file writing to a shared volume.
            # In Docker, we'll mount /app/results
            result_path = f"/results/{job_id}/index.html"
            crud.update_job_status(db, job_id, "passed", result_path=result_path, duration="1m 30s") # Mock duration
            await manager.broadcast(json.dumps({"type": "job_update", "job_id": job_id, "status": "passed"}))
        else:
            print(f"Script failed: {stderr.decode()}")
            crud.update_job_status(db, job_id, "failed")
            await manager.broadcast(json.dumps({"type": "job_update", "job_id": job_id, "status": "failed"}))

    except Exception as e:
        print(f"Job failed: {e}")
        crud.update_job_status(db, job_id, "failed")
        await manager.broadcast(json.dumps({"type": "job_update", "job_id": job_id, "status": "failed"}))
    finally:
        db.close()

async def cleanup_old_results():
    while True:
        try:
            print("Running cleanup...")
            results_dir = "/results"
            if os.path.exists(results_dir):
                now = time.time()
                for job_id in os.listdir(results_dir):
                    job_path = os.path.join(results_dir, job_id)
                    if os.path.isdir(job_path):
                        mtime = os.path.getmtime(job_path)
                        if now - mtime > 7 * 86400: # 7 days
                            print(f"Deleting old result: {job_path}")
                            shutil.rmtree(job_path)
        except Exception as e:
            print(f"Cleanup error: {e}")
        
        await asyncio.sleep(86400) # 24 hours