// src/tui/functions/intro.rs
use crate::state::app::state::AppState;
use crate::buffer::state::{AppView, BufferState};

/// Handles intro screen selection by updating view history and managing focus state.
/// 0: Continue (restores last form or default)
/// 1: Admin view
/// 2: Login view
/// 3: Register view (with focus reset)
pub fn handle_intro_selection(
    app_state: &mut AppState,
    buffer_state: &mut BufferState,
    index: usize,
) {
    let target_view = match index {
        0 => AppView::Form,
        1 => AppView::Admin,
        2 => AppView::Login,
        3 => AppView::Register,
        _ => return,
    };

    buffer_state.update_history(target_view);
    
    // Register view requires focus reset
    if index == 3 {
        app_state.ui.focus_outside_canvas = false;
        app_state.focused_button_index = 0;
    }
}