#include "esp_http_client.h"
#include "esp_log.h"
#include <string.h>
#include <stdlib.h>
#include "buzzer.h"

static const char *TAG = "WEATHER";

static bool parse_temperature_from_json(const char *json, float *out_temp)
{
    if (!json || !out_temp) return false;

    // 1) ir para o bloco "current"
    const char *p = strstr(json, "\"current\"");
    if (!p) return false;

    // 2) procurar temperature_2m DENTRO de current
    p = strstr(p, "\"temperature_2m\"");
    if (!p) return false;

    // 3) ir para o valor
    p = strchr(p, ':');
    if (!p) return false;

    *out_temp = strtof(p + 1, NULL);
    return true;
}


bool net_weather_update(float *out_temp)
{
    char buf[512];

    esp_http_client_config_t cfg = {
        .url = "http://api.open-meteo.com/v1/forecast?latitude=38.75&longitude=-9.125&current=temperature_2m",
        .method = HTTP_METHOD_GET,
        .transport_type = HTTP_TRANSPORT_OVER_TCP,
        .timeout_ms = 10000,
        .user_agent = "esp32-weather",
    };

    ESP_LOGI(TAG, "➡️ HTTP init");

    esp_http_client_handle_t client = esp_http_client_init(&cfg);
    if (!client) {
        ESP_LOGE(TAG, "❌ http_client_init falhou");
        return false;
    }

    esp_err_t err = esp_http_client_open(client, 0);
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "❌ http_client_open falhou: %s", esp_err_to_name(err));
        esp_http_client_cleanup(client);
        return false;
    }

    int content_length = esp_http_client_fetch_headers(client);
    ESP_LOGI(TAG, "📦 content-length = %d", content_length);

    int len = esp_http_client_read(client, buf, sizeof(buf) - 1);
    if (len <= 0) {
        ESP_LOGE(TAG, "❌ http_client_read falhou");
        esp_http_client_close(client);
        esp_http_client_cleanup(client);
        return false;
    }

    buf[len] = 0;
    ESP_LOGI(TAG, "📩 JSON: %s", buf);

    esp_http_client_close(client);
    esp_http_client_cleanup(client);

    if (!parse_temperature_from_json(buf, out_temp)) {
        ESP_LOGE(TAG, "❌ parse_temperature_from_json falhou");
        return false;
    }

    return true;
}