/******************************************************************************
 * Copyright (c) Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#include <errno.h>
#include <stdio.h>
#include <stdlib.h> /* strtol() */
#include <string.h>

#include <unistd.h>

#include <glib.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>

#include <libtransmission/transmission.h>
#include <libtransmission/variant.h>

#include "conf.h"
#include "tr-prefs.h"
#include "util.h"

#define MY_CONFIG_NAME "transmission"

static char* gl_confdir = nullptr;

void gtr_pref_init(char const* config_dir)
{
    gl_confdir = g_strdup(config_dir);
}

/***
****
****  Preferences
****
***/

/**
 * This is where we initialize the preferences file with the default values.
 * If you add a new preferences key, you /must/ add a default value here.
 */
static void tr_prefs_init_defaults(tr_variant* d)
{
    char const* dir;

    dir = g_get_user_special_dir(G_USER_DIRECTORY_DOWNLOAD);

    if (dir == nullptr)
    {
        dir = g_get_user_special_dir(G_USER_DIRECTORY_DESKTOP);
    }

    if (dir == nullptr)
    {
        dir = tr_getDefaultDownloadDir();
    }

    tr_variantDictReserve(d, 31);
    tr_variantDictAddStr(d, TR_KEY_watch_dir, dir);
    tr_variantDictAddBool(d, TR_KEY_watch_dir_enabled, FALSE);
    tr_variantDictAddBool(d, TR_KEY_user_has_given_informed_consent, FALSE);
    tr_variantDictAddBool(d, TR_KEY_inhibit_desktop_hibernation, FALSE);
    tr_variantDictAddBool(d, TR_KEY_blocklist_updates_enabled, TRUE);
    tr_variantDictAddStr(d, TR_KEY_open_dialog_dir, g_get_home_dir());
    tr_variantDictAddBool(d, TR_KEY_show_toolbar, TRUE);
    tr_variantDictAddBool(d, TR_KEY_show_filterbar, TRUE);
    tr_variantDictAddBool(d, TR_KEY_show_statusbar, TRUE);
    tr_variantDictAddBool(d, TR_KEY_trash_can_enabled, TRUE);
    tr_variantDictAddBool(d, TR_KEY_show_notification_area_icon, FALSE);
    tr_variantDictAddBool(d, TR_KEY_show_tracker_scrapes, FALSE);
    tr_variantDictAddBool(d, TR_KEY_show_extra_peer_details, FALSE);
    tr_variantDictAddBool(d, TR_KEY_show_backup_trackers, FALSE);
    tr_variantDictAddStr(d, TR_KEY_statusbar_stats, "total-ratio");
    tr_variantDictAddBool(d, TR_KEY_torrent_added_notification_enabled, true);
    tr_variantDictAddBool(d, TR_KEY_torrent_complete_notification_enabled, true);
    tr_variantDictAddBool(d, TR_KEY_torrent_complete_sound_enabled, true);
    tr_variantDictAddBool(d, TR_KEY_show_options_window, TRUE);
    tr_variantDictAddBool(d, TR_KEY_main_window_is_maximized, FALSE);
    tr_variantDictAddInt(d, TR_KEY_main_window_height, 500);
    tr_variantDictAddInt(d, TR_KEY_main_window_width, 300);
    tr_variantDictAddInt(d, TR_KEY_main_window_x, 50);
    tr_variantDictAddInt(d, TR_KEY_main_window_y, 50);
    tr_variantDictAddInt(d, TR_KEY_details_window_height, 500);
    tr_variantDictAddInt(d, TR_KEY_details_window_width, 700);
    tr_variantDictAddStr(d, TR_KEY_download_dir, dir);
    tr_variantDictAddStr(d, TR_KEY_sort_mode, "sort-by-name");
    tr_variantDictAddBool(d, TR_KEY_sort_reversed, FALSE);
    tr_variantDictAddBool(d, TR_KEY_compact_view, FALSE);
}

static void ensure_sound_cmd_is_a_list(tr_variant* dict)
{
    tr_quark key = TR_KEY_torrent_complete_sound_command;
    tr_variant* list = nullptr;
    if (tr_variantDictFindList(dict, key, &list))
    {
        return;
    }

    tr_variantDictRemove(dict, key);
    list = tr_variantDictAddList(dict, key, 5);
    tr_variantListAddStr(list, "canberra-gtk-play");
    tr_variantListAddStr(list, "-i");
    tr_variantListAddStr(list, "complete-download");
    tr_variantListAddStr(list, "-d");
    tr_variantListAddStr(list, "transmission torrent downloaded");
}

static tr_variant* getPrefs(void)
{
    static tr_variant settings;
    static gboolean loaded = FALSE;

    if (!loaded)
    {
        tr_variantInitDict(&settings, 0);
        tr_prefs_init_defaults(&settings);
        tr_sessionLoadSettings(&settings, gl_confdir, MY_CONFIG_NAME);
        ensure_sound_cmd_is_a_list(&settings);
        loaded = TRUE;
    }

    return &settings;
}

/***
****
***/

tr_variant* gtr_pref_get_all(void)
{
    return getPrefs();
}

int64_t gtr_pref_int_get(tr_quark const key)
{
    int64_t i;

    return tr_variantDictFindInt(getPrefs(), key, &i) ? i : 0;
}

void gtr_pref_int_set(tr_quark const key, int64_t value)
{
    tr_variantDictAddInt(getPrefs(), key, value);
}

double gtr_pref_double_get(tr_quark const key)
{
    double d;

    return tr_variantDictFindReal(getPrefs(), key, &d) ? d : 0.0;
}

void gtr_pref_double_set(tr_quark const key, double value)
{
    tr_variantDictAddReal(getPrefs(), key, value);
}

/***
****
***/

gboolean gtr_pref_flag_get(tr_quark const key)
{
    bool boolVal;

    return tr_variantDictFindBool(getPrefs(), key, &boolVal) ? boolVal : false;
}

void gtr_pref_flag_set(tr_quark const key, gboolean value)
{
    tr_variantDictAddBool(getPrefs(), key, value);
}

/***
****
***/

char** gtr_pref_strv_get(tr_quark const key)
{
    char** ret = nullptr;

    tr_variant* list = nullptr;
    if (tr_variantDictFindList(getPrefs(), key, &list))
    {
        size_t out = 0;
        size_t const n = tr_variantListSize(list);
        ret = g_new0(char*, n + 1);

        for (size_t i = 0; i < n; ++i)
        {
            char const* str = nullptr;
            size_t len = 0;
            if (tr_variantGetStr(tr_variantListChild(list, i), &str, &len))
            {
                ret[out++] = g_strndup(str, len);
            }
        }
    }

    return ret;
}

char const* gtr_pref_string_get(tr_quark const key)
{
    char const* str;

    return tr_variantDictFindStr(getPrefs(), key, &str, nullptr) ? str : nullptr;
}

void gtr_pref_string_set(tr_quark const key, char const* value)
{
    tr_variantDictAddStr(getPrefs(), key, value);
}

/***
****
***/

void gtr_pref_save(tr_session* session)
{
    tr_sessionSaveSettings(session, gl_confdir, getPrefs());
}