"""
Student Analyzer Application

This script initializes and runs the Student Analyzer application, which provides an interface for
managing student data, class records, and submissions. It uses the Hello ImGui framework for UI rendering
and integrates a database to store and manipulate student information.

Modules:
    - Custom Imports: Imports internal models and application state.
    - Layouts: Defines different UI layouts for the analyzer and database editor.
    - External Libraries: Uses imgui_bundle and Hello ImGui for UI rendering.
    - Built-in Libraries: Uses shelve for persistent state storage and typing for type hints.
"""

# Custom
from model import *  # Importing database models like Class, Student, Lecture, and Submission
from appstate import AppState, LOG_ERROR  # Application state management

# Layouts
from analyzer import analyzer_layout  # Main layout for the analyzer
from database import database_editor_layout  # Alternative layout for database editing

# External
from imgui_bundle import imgui, immapp, hello_imgui, ImVec2  # ImGui-based UI framework

# Built-in
import shelve  # Persistent key-value storage
from typing import List  # Type hinting

def menu_bar(runner_params: hello_imgui.RunnerParams) -> None:
    """Defines the application's menu bar."""
    try:
        hello_imgui.show_app_menu(runner_params)
        hello_imgui.show_view_menu(runner_params)
    
        if imgui.begin_menu("File"):
            clicked, _ = imgui.menu_item("Open", "", False)
            if clicked:
                pass  # TODO: Implement file opening logic
            imgui.end_menu()
    except Exception as e:
        LOG_ERROR(f"menu_bar {e}")


def status_bar(app_state: AppState) -> None:
    """Displays the status bar information."""
    try:
        imgui.text("Student Analyzer by @DerGrumpf")
    except Exception as e:
        LOG_ERROR(f"status_bar {e}")


def main() -> None:
    """Main function to initialize and run the application."""
    app_state = AppState()
        
    # Load Database
    try:
        with shelve.open("state") as state:
            v = state.get("DB")  # Retrieve stored database connection info
            if v:
                db.init(v)
                db.connect()
                db.create_tables([Class, Student, Lecture, Submission, Group])  # Ensure tables exist
                app_state.update()
    except Exception as e:
        LOG_ERROR(f"Database Initialization {e}")

    # Set Window Parameters
    runner_params = hello_imgui.RunnerParams()
    runner_params.app_window_params.window_title = "Analyzer"
    runner_params.imgui_window_params.menu_app_title = "Analyzer"
    runner_params.app_window_params.window_geometry.size = (1000, 900)
    runner_params.app_window_params.restore_previous_geometry = True
    runner_params.app_window_params.borderless = True
    runner_params.app_window_params.borderless_movable = True 
    runner_params.app_window_params.borderless_resizable = True 
    runner_params.app_window_params.borderless_closable = True 

    # Configure UI Elements
    runner_params.imgui_window_params.show_menu_bar = True
    runner_params.imgui_window_params.show_menu_app = False
    runner_params.imgui_window_params.show_menu_view = False
    runner_params.imgui_window_params.show_status_bar = True
    runner_params.callbacks.show_menus = lambda: menu_bar(runner_params)
    runner_params.callbacks.show_status = lambda: status_bar(app_state)

    # Application layout
    runner_params.imgui_window_params.default_imgui_window_type = (
        hello_imgui.DefaultImGuiWindowType.provide_full_screen_dock_space
    )
    runner_params.imgui_window_params.enable_viewports = True
    runner_params.docking_params = analyzer_layout(app_state)
    runner_params.alternative_docking_layouts = [
        database_editor_layout(app_state)
    ]

    # Save App Settings
    runner_params.ini_folder_type = hello_imgui.IniFolderType.app_user_config_folder
    runner_params.ini_filename = "Analyzer/Analyzer.ini"
    runner_params.docking_params.layout_condition = hello_imgui.DockingLayoutCondition.application_start

    # Run the Application
    add_ons_params = immapp.AddOnsParams()
    add_ons_params.with_markdown = True
    add_ons_params.with_implot = True
    add_ons_params.with_implot3d = True

    immapp.run(runner_params, add_ons_params)

if __name__ == "__main__":
    main()