// GET /api/tasks/upcoming — Today's tasks per user, grouped by period

#include "cJSON.h"
#include "esp_http_server.h"

#include "todo.hpp"
#include "types.hpp"

internal esp_err_t api_tasks_upcoming_handler(httpd_req_t *req)
{
  httpd_resp_set_type(req, "application/json");
  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");

  cJSON *root = cJSON_CreateObject();
  cJSON *users_arr = cJSON_AddArrayToObject(root, "users");

  for (int u = 0; u < MAX_USERS; u++)
  {
    if (!g_Users[u].active)
      continue;

    // Collect incomplete tasks for this user
    // Include: recurring tasks (any day) and one-off tasks
    cJSON *user_obj = cJSON_CreateObject();
    cJSON_AddNumberToObject(user_obj, "id", g_Users[u].id);
    cJSON_AddStringToObject(user_obj, "name", g_Users[u].name);

    cJSON *tasks_arr = cJSON_AddArrayToObject(user_obj, "tasks");

    for (int t = 0; t < MAX_TASKS; t++)
    {
      if (!g_Tasks[t].active || g_Tasks[t].completed ||
          g_Tasks[t].user_id != g_Users[u].id)
        continue;

      cJSON *t_obj = cJSON_CreateObject();
      cJSON_AddNumberToObject(t_obj, "id", g_Tasks[t].id);
      cJSON_AddStringToObject(t_obj, "title", g_Tasks[t].title);
      cJSON_AddNumberToObject(t_obj, "due_date", (double)g_Tasks[t].due_date);
      cJSON_AddNumberToObject(t_obj, "period", g_Tasks[t].period);
      cJSON_AddNumberToObject(t_obj, "recurrence", g_Tasks[t].recurrence);
      cJSON_AddBoolToObject(t_obj, "completed", g_Tasks[t].completed);
      cJSON_AddItemToArray(tasks_arr, t_obj);
    }

    cJSON_AddItemToArray(users_arr, user_obj);
  }

  const char *json = cJSON_PrintUnformatted(root);
  httpd_resp_sendstr(req, json);

  free((void *)json);
  cJSON_Delete(root);

  return ESP_OK;
}

internal const httpd_uri_t api_tasks_upcoming_uri = {
    .uri = "/api/tasks/upcoming",
    .method = HTTP_GET,
    .handler = api_tasks_upcoming_handler,
    .user_ctx = NULL};