#include "verbose.h"

#include <cjson/cJSON.h>
#include <stdio.h>
#include <stdlib.h>

static bool g_verbose = false;
static void (*g_sink)(const char *, void *) = NULL;
static void *g_sink_ud = NULL;

void verbose_set(bool on) {
    g_verbose = on;
}

bool verbose_enabled(void) {
    return g_verbose;
}

void verbose_set_sink(void (*sink)(const char *line, void *ud), void *ud) {
    g_sink = sink;
    g_sink_ud = ud;
}

void verbose_log(const char *event, const vlog_kv *kvs, size_t n) {
    if (!g_verbose)
        return;
    cJSON *obj = cJSON_CreateObject();
    cJSON_AddStringToObject(obj, "event", event);
    for (size_t i = 0; i < n && kvs; i++) {
        const vlog_kv *kv = &kvs[i];
        switch (kv->kind) {
        case VLOG_STR:
            cJSON_AddStringToObject(obj, kv->key, kv->s ? kv->s : "");
            break;
        case VLOG_INT:
            cJSON_AddNumberToObject(obj, kv->key, kv->i);
            break;
        case VLOG_BOOL:
            cJSON_AddBoolToObject(obj, kv->key, kv->b);
            break;
        case VLOG_DBL:
            cJSON_AddNumberToObject(obj, kv->key, kv->d);
            break;
        }
    }
    char *line = cJSON_PrintUnformatted(obj);
    if (line) {
        if (g_sink)
            g_sink(line, g_sink_ud);
        else
            fprintf(stderr, "%s\n", line);
        free(line);
    }
    cJSON_Delete(obj);
}