#define _POSIX_C_SOURCE 200809L
#include <err.h>
#include <string.h>
#include <pthread.h>
#include <jansson.h>
#include "timeline.h"
#include "auth.h"
#include "config.h"
#include "http.h"
#include "string-util.h"
#include "log.h"

#define TIMELINE_URL "https://%s/api/v1/timelines/home"

static char *get_timeline_url(const char *domain)
{
    char *url;
    size_t size;

    size = strlen(TIMELINE_URL) + strlen(domain) - 1;
    url = malloc(size);
    if (!url) {
        err(1, NULL);
        return NULL;
    }

    sprintf(url, TIMELINE_URL, domain);
    return url;
}

struct timeline *timeline_from_json(const char *json_data)
{
    struct timeline *t;
    json_t *root;
    json_error_t error;

    root = json_loads(json_data, 0, &error);
    if (!root) {
        log_msg(LOG_WARNING, "timeline_from_json", "json root it null");
        return NULL;
    }

    if (!json_is_array(root)) {
        log_msg(LOG_WARNING, "timeline_from_json", "json root is not array");
        json_decref(root);
        return NULL;
    }

    t = calloc(1, sizeof(struct timeline));
    if (!t) {
        err(1, NULL);
        json_decref(root);
        return NULL;
    }

    t->size = json_array_size(root);
    t->statuses = calloc(t->size, sizeof(struct status *));
    if (!(t->statuses)) {
        err(1, NULL);
        timeline_free(t);
        json_decref(root);
        return NULL;
    }

    json_t *data;
    for (size_t i = 0; i < t->size; i++) {
        data = json_array_get(root, i);
        if (!data)
            goto error;
        t->statuses[i] = status_from_json_t(data);
        if (!(t->statuses[i]))
            goto error;
    }
    json_decref(root);
    return t;

error:
    timeline_free(t);
    json_decref(root);
    return NULL;
}

void timeline_free(struct timeline *t)
{
    for (size_t i = 0; i < t->size; i++) {
        if (t->statuses[i])
            status_free(t->statuses[i]);
    }
    free(t->statuses);
    free(t);
}

struct timeline *get_timeline(const char *max_id, const char *since_id, const char *min_id,
        int limit)
{
    char *url, *resp;
    struct timeline *t;

    url = get_timeline_url(config->instance_url);
    if (!url) {
        err(1, "get_timeline");
        return NULL;
    }

    resp = get_request(url);
    free(url);
    if (!resp) {
        return NULL;
    }

    t = timeline_from_json(resp);
    free(resp);
    if (!t) {
        return NULL;
    }

    return t;
}