/*
 * cmd_sdcard.c
 *
 * Copyright (c) 2025 Umber Networks & Robert McMahon
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <string.h>
#include "esp_console.h"
#include "argtable3/argtable3.h"
#include "app_console.h"
#include "sd_card.h"

#define SDCARD_READ_BUF_SIZE 4096

static int do_sdcard_status(int argc, char **argv) {
    (void)argc;
    (void)argv;

    printf("SD Card Status:\n");
    printf("  CD (Card Detect):  ");
    if (sd_card_cd_available()) {
        int level = sd_card_cd_get_level();
        bool inserted = sd_card_cd_is_inserted();
        printf("%s (GPIO=%s)\n", inserted ? "INSERTED" : "REMOVED",
               level >= 0 ? (level ? "HIGH" : "LOW") : "?");
        if (!inserted && sd_card_is_ready()) {
            printf("  (Card works but CD says REMOVED: wire CD to J1 Pin 12, or menuconfig -> SD Card -> uncheck 'LOW = inserted')\n");
        }
    } else {
        printf("N/A (pin not configured)\n");
    }
    printf("  Mounted:           %s\n", sd_card_is_ready() ? "yes" : "no");

    if (sd_card_is_ready()) {
        uint64_t total = 0, free_bytes = 0;
        if (sd_card_get_info(&total, &free_bytes) == 0) {
            printf("  Total:             %.2f MB\n", total / (1024.0 * 1024.0));
            printf("  Free:              %.2f MB\n", free_bytes / (1024.0 * 1024.0));
        }
    }
    return 0;
}

static int do_sdcard_write(int argc, char **argv) {
    if (argc < 3) {
        printf("Usage: sdcard write <file> <text...>\n");
        return 1;
    }
    const char *filename = argv[1];

    if (!sd_card_is_ready()) {
        printf("Error: SD card not mounted\n");
        return 1;
    }

    /* Join argv[2]..argv[argc-1] with spaces for multi-word text */
    static char text_buf[512];
    size_t off = 0;
    for (int i = 2; i < argc && off < sizeof(text_buf) - 2; i++) {
        if (i > 2) {
            text_buf[off++] = ' ';
        }
        size_t len = strlen(argv[i]);
        if (off + len >= sizeof(text_buf)) {
            len = sizeof(text_buf) - off - 1;
        }
        memcpy(text_buf + off, argv[i], len);
        off += len;
    }
    text_buf[off] = '\0';

    esp_err_t ret = sd_card_write_file(filename, text_buf, off, false);
    if (ret != 0) {
        printf("Write failed: %s\n", esp_err_to_name(ret));
        return 1;
    }
    printf("Wrote %zu bytes to %s\n", off, filename);
    return 0;
}

static int do_sdcard_read(int argc, char **argv) {
    if (argc < 2) {
        printf("Usage: sdcard read <file>\n");
        return 1;
    }
    const char *filename = argv[1];

    if (!sd_card_is_ready()) {
        printf("Error: SD card not mounted\n");
        return 1;
    }

    if (!sd_card_file_exists(filename)) {
        printf("Error: File not found: %s\n", filename);
        return 1;
    }

    static uint8_t buf[SDCARD_READ_BUF_SIZE];
    size_t bytes_read = 0;
    esp_err_t ret = sd_card_read_file(filename, buf, sizeof(buf) - 1, &bytes_read);
    if (ret != 0) {
        printf("Read failed: %s\n", esp_err_to_name(ret));
        return 1;
    }
    buf[bytes_read] = '\0';
    printf("Read %zu bytes from %s:\n", bytes_read, filename);
    printf("---\n%s\n---\n", (char *)buf);
    return 0;
}

static int cmd_sdcard(int argc, char **argv) {
    if (argc < 2) {
        printf("Usage: sdcard <status|write|read> [args]\n");
        printf("  status          - Show CD, mounted, capacity\n");
        printf("  write <f> <t>   - Write text to file\n");
        printf("  read <f>        - Read and print file\n");
        return 0;
    }
    if (strcmp(argv[1], "status") == 0) {
        return do_sdcard_status(argc - 1, &argv[1]);
    }
    if (strcmp(argv[1], "write") == 0) {
        return do_sdcard_write(argc - 1, &argv[1]);
    }
    if (strcmp(argv[1], "read") == 0) {
        return do_sdcard_read(argc - 1, &argv[1]);
    }
    printf("Unknown subcommand '%s'\n", argv[1]);
    return 1;
}

void register_sdcard_cmd(void) {
    const esp_console_cmd_t cmd = {
        .command = "sdcard",
        .help = "SD card: status (CD, capacity), write <file> <text>, read <file>",
        .hint = "<status|write|read>",
        .func = &cmd_sdcard,
    };
    ESP_ERROR_CHECK(esp_console_cmd_register(&cmd));
}