# -*- coding: utf-8 -*-
"""builder.py - Handles the execution of the PyInstaller build process in a separate thread."""

import subprocess
import os
import traceback
from typing import Optional, List, Dict, Callable

def run_build_in_thread(
    command: List[str],
    working_dir: str,
    output_queue: 'queue.Queue',
    logger_func: Callable[..., None],
    output_dir_name: str,
    environment: Optional[Dict[str, str]] = None
):
    """
    Executes the PyInstaller command using subprocess.Popen in the background.
    Streams stdout/stderr to the output_queue for display in the GUI.
    Notifies the main thread of success, failure, or completion via the queue.
    """
    build_process = None
    try:
        logger_func("Build thread starting execution...", level="INFO")
        command_str_for_log = " ".join([f'"{c}"' if " " in c else c for c in command])
        logger_func(f"PyInstaller command to be executed: {command_str_for_log}", level="DEBUG")
        logger_func(f"Working directory: {working_dir}", level="DEBUG")
        
        env_log_msg = f"Using {'custom' if environment else 'inherited'} environment."
        logger_func(f"PyInstaller process starting. {env_log_msg}", level="INFO")

        build_process = subprocess.Popen(
            command,
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,
            cwd=working_dir,
            text=True,
            encoding="utf-8",
            errors="replace",
            bufsize=1,
            env=environment,
        )
        logger_func(f"PyInstaller process launched (PID: {build_process.pid}).", level="INFO")

        # Stream output
        while True:
            line = build_process.stdout.readline()
            if not line:
                if build_process.poll() is not None:
                    logger_func("End of PyInstaller output stream.", level="DEBUG")
                    break
                else:
                    continue
            # Messaggio per il logger della GUI
            output_queue.put(("LOG_STREAM", "LOG", line))

        return_code = build_process.wait()
        logger_func(f"PyInstaller process finished with exit code: {return_code}", level="INFO")

        if return_code == 0:
            dist_path_abs = os.path.join(working_dir, output_dir_name)
            if os.path.exists(dist_path_abs):
                success_msg = f"Build completed successfully!\nOutput Directory: {dist_path_abs}"
                # Messaggio per la GUI principale
                output_queue.put(("MAIN_GUI_ACTION", "BUILD_SUCCESS", success_msg))
            else:
                warn_msg = f"Build finished with exit code 0, but output directory not found:\n{dist_path_abs}\nCheck the full log for potential issues."
                logger_func(warn_msg, level="WARNING")
                output_queue.put(("MAIN_GUI_ACTION", "BUILD_ERROR", warn_msg))
        else:
            error_msg = f"Build failed! (Exit Code: {return_code})\nCheck the log for details."
            output_queue.put(("MAIN_GUI_ACTION", "BUILD_ERROR", error_msg))

    except FileNotFoundError:
        error_msg = "Error: 'pyinstaller' command not found.\nEnsure PyInstaller is installed correctly and in the system PATH."
        output_queue.put(("MAIN_GUI_ACTION", "BUILD_ERROR", error_msg))
        logger_func(error_msg, level="CRITICAL")
    except Exception as e:
        error_msg = f"Unexpected error during build process execution: {e}"
        output_queue.put(("MAIN_GUI_ACTION", "BUILD_ERROR", error_msg))
        logger_func(error_msg, level="CRITICAL")
        logger_func(traceback.format_exc(), level="DEBUG")
    finally:
        # Segnala sempre la fine del tentativo di build
        output_queue.put(("MAIN_GUI_ACTION", "BUILD_FINISHED", None))
        logger_func("Build thread finished.", level="INFO")