/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Fading Bitmap "billboard" Image View class
*/

#include "FadeView.h"
#include "Color.h"
#include "Window.h"
#include "Video.h"
#include "Screen.h"
#include "Clock.h"

// +--------------------------------------------------------------------+

FadeView::FadeView(Window* c, double in, double out, double hold)
: View(c),
fade_in(in),
fade_out(out),
hold_time(hold),
step_time(0),
fast(1)
{
    state = StateStart;
}

FadeView::~FadeView()
{ }

// +--------------------------------------------------------------------+

void FadeView::FastFade(int fade_fast) { fast = fade_fast; }
void FadeView::FadeIn(double in)       { fade_in = in; }
void FadeView::FadeOut(double out)     { fade_out = out; }
void FadeView::StopHold()
{
    //Print("  FadeView::StopHold()\n");
    hold_time = 0;
}

// +--------------------------------------------------------------------+

void
FadeView::Refresh()
{
    double msec = Clock::GetInstance()->GuiDelta();

    switch (state) {
    case StateStart:
        if (fade_in) {
            //Print("  *  FadeView: %f, %f, %f\n", fade_in, fade_out, hold_time);
            Color::SetFade(0);
            //Print("  1. FadeView SetFade to   0  (%6.1f)\n", time);
        }

        step_time = 0;
        state = State2;
        break;

    case State2:
        if (fade_in) {
            Color::SetFade(0);
            //Print("  1. FadeView SetFade to   0  (%6.1f)\n", time);
        }

        step_time = 0;
        state = StateIn;
        break;

    case StateIn:
        if (step_time < fade_in) {
            double fade = step_time / fade_in;
            Color::SetFade(fade);
            //Print("  2. FadeView SetFade to %3d  (%6.1f) %6.1f\n", (int) (fade * 100), time, step_time);
            step_time += msec;
        }
        else {
            Color::SetFade(1);
            //Print("  2. FadeView SetFade to %3d  (%6.1f) %6.1f => HOLDING\n", 100, time, step_time);
            step_time = 0;
            state = StateHold;
        }
        break;

    case StateHold:
        if (step_time < hold_time) {
            step_time += msec;
            //Print("  3. FadeView holding at %3d  (%6.1f) %6.1f\n", 100, time, step_time);
        }
        else {
            //Print("  3. FadeView HOLD COMPLETE   (%6.1f) %6.1f\n", time, step_time);
            step_time = 0;
            state = StateOut;
        }
        break;

    case StateOut:
        if (fade_out > 0) {
            if (step_time < fade_out) {
                double fade = 1 - step_time / fade_out;
                Color::SetFade(fade);
                //Print("  4. FadeView SetFade to %3d  (%6.1f) %6.1f\n", (int) (fade*100), time, step_time);
                step_time += msec;
            }
            else {
                Color::SetFade(0);
                //Print("  4. FadeView SetFade to %3d  (%6.1f) %6.1f\n", 0, time, step_time);
                step_time = 0;
                state = StateDone;
            }
        }
        else {
            Color::SetFade(1);
            //Print("  4. FadeView SetFade to %3d  (%6.1f) %6.1f\n", 0, time, step_time);
            step_time = 0;
            state = StateDone;
        }
        break;

    default:
    case StateDone:
        //Print("  5. FadeView done  (%6.1f) %6.1f\n", time, step_time);
        break;
    }
}