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

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_log.h"
#include "esp_console.h"
// REMOVED: #include "linenoise/linenoise.h" <-- CAUSE OF CONFLICT
#include "nvs_flash.h"
#include "esp_netif.h"
#include "lwip/inet.h"

// Components
#include "board_config.h"
#include "status_led.h"
#include "gps_sync.h"
#include "wifi_cfg.h"
#include "wifi_controller.h"
#include "app_console.h"
#include "iperf.h"

// GUARDED INCLUDE
#ifdef CONFIG_ESP_WIFI_CSI_ENABLED
#include "csi_log.h"
#include "csi_manager.h"
#endif

static const char *TAG = "MAIN";

// --- Event Handler -------------------------------------------------
static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {
    if (event_base == WIFI_EVENT) {
        if (event_id == WIFI_EVENT_STA_START) {
            if (wifi_ctl_get_mode() == WIFI_CTL_MODE_STA) {
                status_led_set_state(LED_STATE_WAITING);
            }
        }
        else if (event_id == WIFI_EVENT_STA_DISCONNECTED) {
            if (wifi_ctl_get_mode() == WIFI_CTL_MODE_STA) {
                status_led_set_state(LED_STATE_FAILED);
            }
        }
    }
    else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
        if (wifi_ctl_get_mode() != WIFI_CTL_MODE_STA) return;

        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
        ESP_LOGI(TAG, "Got IP: " IPSTR, IP2STR(&event->ip_info.ip));

        status_led_set_state(LED_STATE_CONNECTED);

#ifdef CONFIG_ESP_WIFI_CSI_ENABLED
        if (csi_mgr_should_enable()) {
            ESP_LOGI(TAG, "CSI enabled in config - starting capture");
            csi_mgr_enable_async();
            csi_mgr_schedule_dump();
        } else {
            ESP_LOGI(TAG, "CSI disabled in config - skipping capture");
        }
#endif

        iperf_cfg_t cfg = { .flag = IPERF_FLAG_SERVER | IPERF_FLAG_TCP, .sport = 5001 };
        iperf_start(&cfg);
    }
}

// --- Main ----------------------------------------------------------
void app_main(void) {
    // 1. System Init
    ESP_ERROR_CHECK(nvs_flash_init());
    ESP_ERROR_CHECK(esp_netif_init());
    ESP_ERROR_CHECK(esp_event_loop_create_default());

    // 2. Hardware/Driver Init
#ifdef CONFIG_ESP_WIFI_CSI_ENABLED
    ESP_ERROR_CHECK(csi_log_init());
#endif
    status_led_init(RGB_LED_GPIO, HAS_RGB_LED);

    const gps_sync_config_t gps_cfg = {
        .uart_port = UART_NUM_1,
        .tx_pin = GPS_TX_PIN,
        .rx_pin = GPS_RX_PIN,
        .pps_pin = GPS_PPS_PIN,
    };
    gps_sync_init(&gps_cfg, true);

    // 3. Subsystem Init
#ifdef CONFIG_ESP_WIFI_CSI_ENABLED
    csi_mgr_init();
#endif
    wifi_ctl_init();

    // THIS call starts the cmd_transport (UART listener task)
    // which effectively replaces the manual console loop below.
    wifi_cfg_init();

    // 4. Console Registry Init (Still needed for registering commands)
    esp_console_config_t console_config = {
        .max_cmdline_args = 8,
        .max_cmdline_length = 256,
    };
    ESP_ERROR_CHECK(esp_console_init(&console_config));
    esp_console_register_help_command();

    // Register App Commands
    app_console_register_commands();

    // 5. Register Events
    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, NULL));
    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, NULL));

    // 6. Application Start
#ifdef CONFIG_ESP_WIFI_CSI_ENABLED
    bool csi_enabled = csi_mgr_should_enable();
    ESP_LOGI(TAG, "CSI Capture: %s", csi_enabled ? "ENABLED" : "DISABLED");
#endif

    if (wifi_cfg_apply_from_nvs()) {
        status_led_set_state(LED_STATE_WAITING);

        char mode[16] = {0};
        uint8_t mon_ch = 36;
        if (wifi_cfg_get_mode(mode, &mon_ch) && strcmp(mode, "MONITOR") == 0) {
            wifi_ctl_auto_monitor_start(mon_ch);
        }
    } else {
        status_led_set_state(LED_STATE_NO_CONFIG);
        ESP_LOGW(TAG, "No Config Found. Waiting for setup...");
    }

    // 7. Keep Main Task Alive
    // We removed linenoise because cmd_transport.c is already reading UART.
    ESP_LOGI(TAG, "Initialization complete. Entering idle loop.");

    while (true) {
        // Just sleep forever. cmd_transport task handles input.
        // main event loop task handles wifi events.
        vTaskDelay(pdMS_TO_TICKS(1000));
    }
}