// SPDX-License-Identifier: Apache-2.0
#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdbool.h>

#include <tactility/device.h>
#include <tactility/drivers/gpio.h>

struct St7701Config {
    uint16_t horizontal_resolution;
    uint16_t vertical_resolution;

    uint32_t pixel_clock_hz;
    uint32_t hsync_pulse_width;
    uint32_t hsync_back_porch;
    uint32_t hsync_front_porch;
    uint32_t vsync_pulse_width;
    uint32_t vsync_back_porch;
    uint32_t vsync_front_porch;
    bool hsync_idle_low;
    bool vsync_idle_low;
    bool de_idle_high;
    bool pclk_active_neg;
    bool pclk_idle_high;

    // Number of parallel data lines actually wired (8 or 16). Only the first data_width
    // pin-dataN fields below are used; the rest are ignored.
    uint8_t data_width;
    // Color depth in bpp (16, 18 or 24). Passed to both the RGB timing config and the ST7701
    // vendor config, which uses it to pick its MADCTL/COLMOD bring-up values.
    uint8_t bits_per_pixel;
    // Number of screen-sized frame buffers the driver allocates (0 or 1 = single-buffered).
    uint8_t num_fbs;
    // Non-zero enables the DRAM bounce-buffer DMA path, sized in pixels.
    uint32_t bounce_buffer_size_px;
    uint32_t sram_trans_align;
    uint32_t psram_trans_align;

    struct GpioPinSpec pin_hsync;
    struct GpioPinSpec pin_vsync;
    struct GpioPinSpec pin_de;
    struct GpioPinSpec pin_pclk;
    // Optional display-enable control pin, GPIO_PIN_SPEC_NONE if unused.
    struct GpioPinSpec pin_disp;

    struct GpioPinSpec pin_data0;
    struct GpioPinSpec pin_data1;
    struct GpioPinSpec pin_data2;
    struct GpioPinSpec pin_data3;
    struct GpioPinSpec pin_data4;
    struct GpioPinSpec pin_data5;
    struct GpioPinSpec pin_data6;
    struct GpioPinSpec pin_data7;
    struct GpioPinSpec pin_data8;
    struct GpioPinSpec pin_data9;
    struct GpioPinSpec pin_data10;
    struct GpioPinSpec pin_data11;
    struct GpioPinSpec pin_data12;
    struct GpioPinSpec pin_data13;
    struct GpioPinSpec pin_data14;
    struct GpioPinSpec pin_data15;

    bool disp_active_low;
    bool refresh_on_demand;
    bool fb_in_psram;
    bool double_fb;
    bool no_fb;
    bool bb_invalidate_cache;

    bool swap_xy;
    bool mirror_x;
    bool mirror_y;
    bool invert_color;

    // Bit-banged 3-wire command bus (CS/SCL/SDA over plain GPIOs) used to push the vendor
    // bring-up sequence and, depending on flags below, runtime commands. Separate from the
    // RGB pixel bus above - the ST7701 has no MISO line in 3-wire mode.
    struct GpioPinSpec pin_cs;
    struct GpioPinSpec pin_scl;
    struct GpioPinSpec pin_sda;
    bool scl_active_edge;

    // Optional hardware reset pin for the panel. GPIO_PIN_SPEC_NONE falls back to a software
    // reset sent over the 3-wire bus (see esp_lcd_st7701's panel_st7701_reset()).
    struct GpioPinSpec pin_reset;
    bool reset_active_high;

    // See the 'mirror-by-cmd' and 'auto-del-panel-io' binding properties.
    bool mirror_by_cmd;
    bool auto_del_panel_io;

    // Custom vendor init sequence, flattened as bytes: a run of
    // [cmd, data_len, delay_ms, data_len bytes of data...] entries. NULL/0 falls back to the
    // ST7701 component's own built-in default sequence (see vendor_specific_init_default in
    // esp_lcd_st7701_rgb.c) - not guaranteed to match any particular panel's actual bring-up
    // requirements, so most boards should supply their own via this property.
    const uint8_t* init_sequence;
    uint32_t init_sequence_length;

    // Optional reference to this display's backlight device, NULL if none.
    struct Device* backlight;
};

#ifdef __cplusplus
}
#endif