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// This file is part of the CircuitPython project: https://circuitpython.org

//

// SPDX-FileCopyrightText: Copyright (c) 2018 Rose Hooper

// SPDX-FileCopyrightText: Copyright (c) 2022 Jeff Epler for Adafruit Industries

//

// SPDX-License-Identifier: MIT

#include "py/smallint.h"

#include "py/runtime.h"

#include "shared-bindings/_pixelmap/PixelMap.h"

#include "shared-bindings/adafruit_pixelbuf/PixelBuf.h"

#include "shared-module/_pixelmap/PixelMap.h"

static void pixelmap_set_pixel_rgbw(pixelmap_pixelmap_obj_t *self, size_t i, color_u rgbw) {

mp_arg_validate_index_range(i, 0, self->len - 1, MP_QSTR_index);

mp_obj_t item = self->items[i];

if (mp_obj_is_small_int(item)) {

common_hal_adafruit_pixelbuf_pixelbuf_set_pixel_color(self->pixelbuf, MP_OBJ_SMALL_INT_VALUE(item), rgbw.r, rgbw.g, rgbw.b, rgbw.w);

} else {

size_t len;

mp_obj_t *items;

mp_obj_tuple_get(item, &len, &items);

for (size_t j = 0; j < len; j++) {

common_hal_adafruit_pixelbuf_pixelbuf_set_pixel_color(self->pixelbuf, MP_OBJ_SMALL_INT_VALUE(items[j]), rgbw.r, rgbw.g, rgbw.b, rgbw.w);

}

}

}

static void pixelmap_set_pixel(pixelmap_pixelmap_obj_t *self, size_t i, mp_obj_t color) {

color_u rgbw;

common_hal_adafruit_pixelbuf_pixelbuf_parse_color(self->pixelbuf, color, &rgbw.r, &rgbw.g, &rgbw.b, &rgbw.w);

pixelmap_set_pixel_rgbw(self, i, rgbw);

}

void shared_module_pixelmap_pixelmap_construct(pixelmap_pixelmap_obj_t *self, mp_obj_t pixelbuf, mp_obj_t indices) {

self->pixelbuf = pixelbuf;

self->indices = indices;

mp_obj_tuple_get(indices, &self->len, &self->items);

}

static bool auto_write_get_and_clear(pixelmap_pixelmap_obj_t *self) {

bool auto_write = self->auto_write && common_hal_adafruit_pixelbuf_pixelbuf_get_auto_write(self->pixelbuf);

if (auto_write) {

common_hal_adafruit_pixelbuf_pixelbuf_set_auto_write(self->pixelbuf, false);

}

return auto_write;

}

static void auto_write_reapply(pixelmap_pixelmap_obj_t *self, bool auto_write) {

if (auto_write) {

common_hal_adafruit_pixelbuf_pixelbuf_set_auto_write(self->pixelbuf, true);

common_hal_adafruit_pixelbuf_pixelbuf_show(self->pixelbuf);

}

}

bool shared_module_pixelmap_pixelmap_auto_write_get(pixelmap_pixelmap_obj_t *self) {

return self->auto_write;

}

void shared_module_pixelmap_pixelmap_auto_write_set(pixelmap_pixelmap_obj_t *self, bool auto_write) {

self->auto_write = auto_write;

}

void shared_module_pixelmap_pixelmap_fill(pixelmap_pixelmap_obj_t *self, const mp_obj_t color) {

color_u rgbw;

common_hal_adafruit_pixelbuf_pixelbuf_parse_color(self->pixelbuf, color, &rgbw.r, &rgbw.g, &rgbw.b, &rgbw.w);

bool auto_write = auto_write_get_and_clear(self);

for (size_t i = 0; i < self->len; i++) {

pixelmap_set_pixel_rgbw(self, i, rgbw);

}

auto_write_reapply(self, auto_write);

}

mp_obj_t shared_module_pixelmap_pixelmap_indices(pixelmap_pixelmap_obj_t *self, int index) {

mp_arg_validate_index_range(index, 0, self->len - 1, MP_QSTR_index);

mp_obj_t item = self->items[index];

if (mp_obj_is_small_int(item)) {

return mp_obj_new_tuple(1, &item);

} else {

return item;

}

}

#if MICROPY_PY_BUILTINS_SLICE

mp_obj_t shared_module_pixelmap_pixelmap_getslice(pixelmap_pixelmap_obj_t *self, mp_bound_slice_t slice, size_t slice_len) {

mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(slice_len, NULL));

for (uint i = 0; i < slice_len; i++) {

t->items[i] = shared_module_pixelmap_pixelmap_getitem(self, i * slice.step + slice.start);

}

return MP_OBJ_FROM_PTR(t);

}

void shared_module_pixelmap_pixelmap_setslice(pixelmap_pixelmap_obj_t *self, const mp_obj_t values, mp_bound_slice_t slice, size_t slice_len) {

size_t num_items = mp_obj_get_int(mp_obj_len(values));

if (num_items != slice_len) {

mp_raise_ValueError_varg(MP_ERROR_TEXT("Unmatched number of items on RHS (expected %d, got %d)."), slice_len, num_items);

}

bool auto_write = auto_write_get_and_clear(self);

// because we didn't preflight the pixel values, an exception could occur.

// In that case we need to do the auto-write of any pixels that were set

// before re-raising the exception

nlr_buf_t nlr;

size_t start = slice.start;

mp_int_t step = slice.step;

if (nlr_push(&nlr) == 0) {

mp_obj_iter_buf_t iter_buf;

mp_obj_t iterable = mp_getiter(values, &iter_buf);

mp_obj_t item;

while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {

pixelmap_set_pixel(self, start, item);

start += step;

}

nlr_pop();

auto_write_reapply(self, auto_write);

} else {

auto_write_reapply(self, auto_write);

// exception converting color value, re-raise

nlr_raise(MP_OBJ_FROM_PTR(nlr.ret_val));

}

}

#endif

void shared_module_pixelmap_pixelmap_setitem(pixelmap_pixelmap_obj_t *self, mp_int_t i, mp_obj_t color) {

color_u rgbw;

common_hal_adafruit_pixelbuf_pixelbuf_parse_color(self->pixelbuf, color, &rgbw.r, &rgbw.g, &rgbw.b, &rgbw.w);

bool auto_write = auto_write_get_and_clear(self);

pixelmap_set_pixel_rgbw(self, i, rgbw);

auto_write_reapply(self, auto_write);

}

mp_obj_t shared_module_pixelmap_pixelmap_getitem(pixelmap_pixelmap_obj_t *self, mp_int_t i) {

mp_arg_validate_index_range(i, 0, self->len - 1, MP_QSTR_index);

mp_obj_t item = self->items[i];

if (mp_obj_is_small_int(item)) {

return common_hal_adafruit_pixelbuf_pixelbuf_get_pixel(self->pixelbuf, MP_OBJ_SMALL_INT_VALUE(item));

} else {

size_t len;

mp_obj_t *items;

mp_obj_tuple_get(item, &len, &items);

return common_hal_adafruit_pixelbuf_pixelbuf_get_pixel(self->pixelbuf, MP_OBJ_SMALL_INT_VALUE(items[0]));

}

}