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+/* Copyright 2017 Fred Sundvik
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEYBOARDS_ERGODOX_INFINITY_SIMPLE_VISUALIZER_H_
+#define KEYBOARDS_ERGODOX_INFINITY_SIMPLE_VISUALIZER_H_
+
+// Currently we are assuming that both the backlight and LCD are enabled
+// But it's entirely possible to write a custom visualizer that use only
+// one of them
+#ifndef LCD_BACKLIGHT_ENABLE
+#error This visualizer needs that LCD backlight is enabled
+#endif
+
+#ifndef LCD_ENABLE
+#error This visualizer needs that LCD is enabled
+#endif
+
+#include "visualizer.h"
+#include "visualizer_keyframes.h"
+#include "lcd_keyframes.h"
+#include "lcd_backlight_keyframes.h"
+#include "system/serial_link.h"
+#include "led.h"
+#include "animations.h"
+
+static const uint32_t logo_background_color = LCD_COLOR(0x00, 0x00, 0xFF);
+static const uint32_t initial_color = LCD_COLOR(0, 0, 0);
+
+static bool initial_update = true;
+
+// Feel free to modify the animations below, or even add new ones if needed
+
+static keyframe_animation_t lcd_layer_display = {
+    .num_frames = 1,
+    .loop = false,
+    .frame_lengths = {gfxMillisecondsToTicks(0)},
+    .frame_functions = {lcd_keyframe_display_layer_and_led_states}
+};
+
+// The color animation animates the LCD color when you change layers
+static keyframe_animation_t color_animation = {
+    .num_frames = 2,
+    .loop = false,
+    // Note that there's a 200 ms no-operation frame,
+    // this prevents the color from changing when activating the layer
+    // momentarily
+    .frame_lengths = {gfxMillisecondsToTicks(200), gfxMillisecondsToTicks(500)},
+    .frame_functions = {keyframe_no_operation, backlight_keyframe_animate_color},
+};
+
+void initialize_user_visualizer(visualizer_state_t* state) {
+    // The brightness will be dynamically adjustable in the future
+    // But for now, change it here.
+    lcd_backlight_brightness(130);
+    state->current_lcd_color = initial_color;
+    state->target_lcd_color = logo_background_color;
+    initial_update = true;
+    start_keyframe_animation(&default_startup_animation);
+}
+
+
+// This function should be implemented by the keymap visualizer
+// Don't change anything else than state->target_lcd_color and state->layer_text as that's the only thing
+// that the simple_visualizer assumes that you are updating
+// Also make sure that the buffer passed to state->layer_text remains valid until the previous animation is
+// stopped. This can be done by either double buffering it or by using constant strings
+static void get_visualizer_layer_and_color(visualizer_state_t* state);
+
+void update_user_visualizer_state(visualizer_state_t* state, visualizer_keyboard_status_t* prev_status) {
+    // Add more tests, change the colors and layer texts here
+    // Usually you want to check the high bits (higher layers first)
+    // because that's the order layers are processed for keypresses
+    // You can for check for example:
+    // state->status.layer
+    // state->status.default_layer
+    // state->status.leds (see led.h for available statuses)
+
+    uint32_t prev_color = state->target_lcd_color;
+    const char* prev_layer_text = state->layer_text;
+
+    get_visualizer_layer_and_color(state);
+
+    if (initial_update || prev_color != state->target_lcd_color) {
+        start_keyframe_animation(&color_animation);
+    }
+
+    if (initial_update || prev_layer_text != state->layer_text) {
+        start_keyframe_animation(&lcd_layer_display);
+    }
+    // You can also stop existing animations, and start your custom ones here
+    // remember that you should normally have only one animation for the LCD
+    // and one for the background. But you can also combine them if you want.
+}
+
+void user_visualizer_suspend(visualizer_state_t* state) {
+    state->layer_text = "Suspending...";
+    uint8_t hue = LCD_HUE(state->current_lcd_color);
+    uint8_t sat = LCD_SAT(state->current_lcd_color);
+    state->target_lcd_color = LCD_COLOR(hue, sat, 0);
+    start_keyframe_animation(&default_suspend_animation);
+}
+
+void user_visualizer_resume(visualizer_state_t* state) {
+    state->current_lcd_color = initial_color;
+    state->target_lcd_color = logo_background_color;
+    initial_update = true;
+    start_keyframe_animation(&default_startup_animation);
+}
+
+#endif /* KEYBOARDS_ERGODOX_INFINITY_SIMPLE_VISUALIZER_H_ */