use egui::Ui;
use gemma::chip8::instructions::Chip8CpuInstructions;

/// GemmaEGui - Viewer
///
///
/// This program lets a user open a CH8 file and it will be decoded
/// as Chip-8 Instructions.
/// Colour variants for instructions show colours for
///  -> Jumps
///  -> Load
///  -> Store
///  -> Timers
///  -> Math (Add, Sub)
///  -> Logic
///  -> Video

fn display_instruction(offset: i32, to_display: &Chip8CpuInstructions, ui: &mut Ui) {
        ui.label(format!("{offset:04x} {}", to_display.name()));
        ui.label(format!("{}", to_display.operands()));
        ui.end_row();
}

fn display_instructions(base_offset: i32, instructions: Vec<Chip8CpuInstructions>, ui: &mut Ui) {
    egui::Grid::new("my_grid")
        .min_col_width(200.0)
        .show(ui, |ui| {
            for (index, instruction) in instructions.iter().enumerate() {
                display_instruction(base_offset + index as i32, instruction, ui);
            }
        });
}

fn main() -> eframe::Result {
    let mut edit_space: String = String::new();

    let options = eframe::NativeOptions {
        viewport: egui::ViewportBuilder::default().with_inner_size([640.0, 480.0]),
        ..Default::default()
    };

    eframe::run_simple_native("Gemma - Chip8 Machine Code Viewer", options, move |ctx, frame| {
        egui::CentralPanel::default().show(ctx, |ui| {
            ui.label("Taxation is Theft");
            // file picker
            ui.vertical_centered(|ui| {
                if ui.button("Load File").clicked() {
                    println!("Clicked load file");
                }
            });
            ui.label("File Picker Herre");
            ui.label("display of file here");

            ui.vertical(|ui| {
                display_instruction(0x010, &Chip8CpuInstructions::ADDI(0x01), ui);
                display_instruction(0x012, &Chip8CpuInstructions::RND(0x01, 0x02), ui);
            });
            ui.text_edit_multiline(&mut edit_space);
        });
    })
}