package pm.application.windows;

import java.io.IOException;
import java.util.Map;

import pm.Application;
import pm.exception.application.ApplicationExitException;
import pm.exception.application.ApplicationInitialiseException;
import pm.util.Native;
import pm.util.Windows;
import pm.value.Command;
import pm.value.Key;
import pm.value.Type;

abstract public class WindowsApplication extends Application {
    protected final static int TERMINATE_SLEEP = 500;
    protected final static int START_SLEEP = 500;

    protected final static String REGISTRY = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths";

    protected String program;
    protected String title;
    protected String name;

    protected Process process;
    protected int handle;

    public WindowsApplication(String program, String title, String name) {
        this.program = program;
        this.title = title;
        this.name = name;
        handle = -1;
    }

    public void initialise() throws ApplicationInitialiseException {
        handle = Windows.findWindow(name, null);
        if (handle < 1) {
            String key = String.format("%s\\%s", REGISTRY, program);
            String path = Native.getValue(key);
            try {
                String command = String.format("\"%s\"", path);
                command = Native.replaceVariables(command);
                process = Runtime.getRuntime().exec(command);
                sleep(START_SLEEP);
                handle = Windows.findWindow(name, null);
                System.out.println(handle);
            } catch (IOException e) {e.printStackTrace();}
        }
        if (handle < 1) {
            throw new ApplicationInitialiseException();
        }
    }

    public void exit() throws ApplicationExitException {
        if (process != null) {
            process.destroy();
        }
        super.exit();
    }

    protected void command(Command command) {
        Windows.sendMessage(handle, Windows.WM_APPCOMMAND, handle, command.getCode() << 16);
    }

    protected void command(int command) {
        Windows.sendMessage(handle, Windows.WM_COMMAND, command, 0);
    }

    protected void user(int code) {
        Windows.sendMessage(handle, Windows.WM_USER + code, 0, 0);
    }

    protected void key(Type key, int code) {
        int scanCode = Windows.mapVirtualKey(code, Windows.MAPVK_VK_TO_VSC);
        Windows.postMessage(handle, key.getCode(), code, 1 | (scanCode << 16));
    }

    protected void key(Type key, char character) {
        key(key, (int) Character.toUpperCase(character));
    }

    protected void key(Type key, Key virtualKey) {
        key(key, virtualKey.getCode());
    }
}