#include <stdio.h>
#include <string.h>
#include <sdkconfig.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/queue.h>
#include <esp_system.h>
#include <esp_err.h>
#include <esp_log.h>
#include "driver/uart.h"
#include "hardware.h"
#include "managed_i2c.h"
#include "pax_gfx.h"
#include "rp2040.h"
#include "rp2040bl.h"
#include "rp2040_firmware.h"
#include "system_wrapper.h"
#include "graphics_wrapper.h"
#include "esp32/rom/crc.h"

void rp2040_updater(RP2040* rp2040, pax_buf_t* pax_buffer, ILI9341* ili9341, uint8_t* framebuffer) {
    char message[64];
    
    uint8_t fw_version;
    if (rp2040_get_firmware_version(rp2040, &fw_version) != ESP_OK) {
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0xa85a32);
        snprintf(message, sizeof(message) - 1, "RP2040 error");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        snprintf(message, sizeof(message) - 1, "Failed to read firmware version");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);
        restart();
    }
    
    pax_noclip(pax_buffer);
    pax_background(pax_buffer, 0xCCCCCC);
    memset(message, 0, sizeof(message));
    snprintf(message, sizeof(message) - 1, "RP2040 firmware: 0x%02X", fw_version);
    pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message);
    ili9341_write(ili9341, framebuffer);
    vTaskDelay(100 / portTICK_PERIOD_MS);
    
    if (fw_version < 0x01) { // Update required
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0x325aa8);
        snprintf(message, sizeof(message) - 1, "Updating RP2040...");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        snprintf(message, sizeof(message) - 1, "Starting bootloader");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);
        rp2040_reboot_to_bootloader(rp2040);
        esp_restart();
    }
    
    if (fw_version == 0xFF) { // RP2040 is in bootloader mode
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0x325aa8);
        snprintf(message, sizeof(message) - 1, "Updating RP2040...");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        ili9341_write(ili9341, framebuffer);

        uint8_t bl_version;
        if (rp2040_get_bootloader_version(rp2040, &bl_version) != ESP_OK) {
            pax_noclip(pax_buffer);
            pax_background(pax_buffer, 0xa85a32);
            snprintf(message, sizeof(message) - 1, "RP2040 update failed");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
            snprintf(message, sizeof(message) - 1, "Communication error (1)");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
            ili9341_write(ili9341, framebuffer);
            restart();
        }
        if (bl_version != 0x01) {
            pax_background(pax_buffer, 0xa85a32);
            snprintf(message, sizeof(message) - 1, "RP2040 update failed");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
            snprintf(message, sizeof(message) - 1, "Unsupported bootloader version");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
            ili9341_write(ili9341, framebuffer);
            restart();
        }
        
        rp2040_bl_install_uart();
        
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0x325aa8);
        snprintf(message, sizeof(message) - 1, "Updating RP2040...");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        snprintf(message, sizeof(message) - 1, "Waiting for bootloader");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);

        while (true) {
            vTaskDelay(1 / portTICK_PERIOD_MS);
            uint8_t bl_state;
            if (rp2040_get_bootloader_state(rp2040, &bl_state) != ESP_OK) {
                pax_noclip(pax_buffer);
                pax_background(pax_buffer, 0xa85a32);
                snprintf(message, sizeof(message) - 1, "RP2040 update failed");
                pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
                snprintf(message, sizeof(message) - 1, "Communication error (2)");
                pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
                ili9341_write(ili9341, framebuffer);
                restart();
            }
            if (bl_state == 0xB0) {
                break;
            }
            if (bl_state > 0xB0) {
                graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Unknown BL state");
                restart();
            }
        }

        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0x325aa8);
        snprintf(message, sizeof(message) - 1, "Updating RP2040...");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        snprintf(message, sizeof(message) - 1, "Waiting for bootloader sync");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);
        
        char rx_buffer[16];
        uint8_t rx_buffer_pos = 0;
        memset(rx_buffer, 0, sizeof(rx_buffer));
        while (true) {
            if (rp2040_bl_sync()) break;
            vTaskDelay(500 / portTICK_PERIOD_MS);
        }
        
        uint32_t flash_start = 0, flash_size = 0, erase_size = 0, write_size = 0, max_data_len = 0;
        
        bool success = rp2040_bl_get_info(&flash_start, &flash_size, &erase_size, &write_size, &max_data_len);
        
        if (!success) {
            pax_noclip(pax_buffer);
            pax_background(pax_buffer, 0xa85a32);
            snprintf(message, sizeof(message) - 1, "RP2040 update failed");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
            snprintf(message, sizeof(message) - 1, "Failed to read information");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
            ili9341_write(ili9341, framebuffer);
            restart();
        }
        
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0x325aa8);
        snprintf(message, sizeof(message) - 1, "Updating RP2040...");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
        snprintf(message, sizeof(message) - 1, "Erasing flash");
        pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);
        
        uint32_t erase_length = sizeof(mch2022_firmware_bin);
        erase_length = erase_length + erase_size - (erase_length % erase_size); // Round up to erase size
        
        if (erase_length > flash_size - erase_size) {
            erase_length = flash_size - erase_size;
        }
        
        bool eraseSuccess = rp2040_bl_erase(flash_start, erase_length);
        
        if (!eraseSuccess) {
            pax_noclip(pax_buffer);
            pax_background(pax_buffer, 0xa85a32);
            snprintf(message, sizeof(message) - 1, "RP2040 update failed");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
            snprintf(message, sizeof(message) - 1, "Failed to erase flash");
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
            ili9341_write(ili9341, framebuffer);
            vTaskDelay(1000 / portTICK_PERIOD_MS);
            restart();
        }
        
        uint32_t position = 0;
        uint32_t txSize = write_size;
        uint8_t* txBuffer = malloc(write_size);
        
        uint32_t blockCrc = 0;
        uint32_t totalCrc = 0;
        uint32_t totalLength = 0;
        
        while (true) {
            if ((sizeof(mch2022_firmware_bin) - position) < txSize) {
                txSize = sizeof(mch2022_firmware_bin) - position;
            }
            
            if (txSize == 0) break;

            uint8_t percentage = position * 100 / sizeof(mch2022_firmware_bin);
            
            pax_noclip(pax_buffer);
            pax_background(pax_buffer, 0x325aa8);
            snprintf(message, sizeof(message) - 1, "Updating RP2040... %u%%", percentage);
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message);
            snprintf(message, sizeof(message) - 1, "Writing @ 0x%08X", 0x10010000 + position);
            pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message);
            ili9341_write(ili9341, framebuffer);

            uint32_t checkCrc = 0;
            memset(txBuffer, 0, write_size);
            memcpy(txBuffer, &mch2022_firmware_bin[position], txSize);
            blockCrc = crc32_le(0, txBuffer, write_size);
            totalCrc = crc32_le(totalCrc, txBuffer, write_size);
            totalLength += write_size;
            bool writeSuccess = rp2040_bl_write(0x10010000 + position, write_size, txBuffer, &checkCrc);
            if (writeSuccess && (blockCrc == checkCrc)) {
                position += txSize;
            } else {
                while (!rp2040_bl_sync()) {
                    vTaskDelay(20 / portTICK_PERIOD_MS);
                }
            }
        }
        
        free(txBuffer);
        
        pax_noclip(pax_buffer);
        pax_background(pax_buffer, 0xCCCCCC);
        memset(message, 0, sizeof(message));
        snprintf(message, sizeof(message) - 1, "Sealing...");
        pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message);
        ili9341_write(ili9341, framebuffer);
        
        bool sealRes = rp2040_bl_seal(0x10010000, 0x10010000, totalLength, totalCrc);
        
        snprintf(message, sizeof(message) - 1, "Result: %s", sealRes ? "OK" : "FAIL");
        pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*1, message);
        ili9341_write(ili9341, framebuffer);
        
        if (sealRes) {
            vTaskDelay(2000 / portTICK_PERIOD_MS);
            pax_noclip(pax_buffer);
            pax_background(pax_buffer, 0xCCCCCC);
            memset(message, 0, sizeof(message));
            snprintf(message, sizeof(message) - 1, "Waiting for reset...");
            pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message);
            ili9341_write(ili9341, framebuffer);
            rp2040_bl_go(0x10010000);
        }

        while (true) {
            vTaskDelay(1000 / portTICK_PERIOD_MS);
        }
    }
}