/* plumb.c - Small utility to manage plumbings from a shutoff instance.
 * ============================================================
 * TODO: write other commands, and move some code to common.h
 *
 * Under CC0, as its a rather useful example of a Parsee tool.
 * See LICENSE for more information about Parsee's licensing. */

#include "common.h"

#include <string.h>

static void
DeletePlumbID(Db *parsee, char *chat_id)
{
    DbRef *chat_id_ref = DbLockIntent(parsee, DB_HINT_READONLY, 2, "chats", chat_id);
    DbRef *chats = DbLock(parsee, 1, "chats");
    char *matrix_id = GrabString(DbJson(chat_id_ref), 1, "room_id");
    char *jabber_id = GrabString(DbJson(chat_id_ref), 1, "jabber_id");

    HashMap *rooms = GrabObject(DbJson(chats), 1, "rooms");
    HashMap *mucs = GrabObject(DbJson(chats), 1, "mucs");

    JsonValueFree(HashMapDelete(rooms, matrix_id));
    JsonValueFree(HashMapDelete(mucs,  jabber_id));

    DbUnlock(parsee, chat_id_ref);
    DbUnlock(parsee, chats);
    DbDelete(parsee, 2, "chats", chat_id);
}
static void
DeletePlumb(Db *parsee, char *potential_id)
{
    if (!parsee || !potential_id)
    {
        return;
    }

    if (!strncmp(potential_id, "xmpp:", 5))
    {
        DbRef *ref;
        HashMap *mucs;
        char *chat_id;
        /* Try to parse it as an XMPP address */
        potential_id += 5;

        ref = DbLockIntent(parsee, DB_HINT_READONLY, 1, "chats");
        mucs = GrabObject(DbJson(ref), 1, "mucs");
        chat_id = StrDuplicate(GrabString(mucs, 1, potential_id));
        DbUnlock(parsee, ref);

        DeletePlumbID(parsee, chat_id);
        Free(chat_id);
        
        return;
    }
    if (*potential_id == '!')
    {
        /* Try to parse it as a Matrix room ID */
        DbRef *ref;
        HashMap *rooms;
        char *chat_id;

        ref = DbLockIntent(parsee, DB_HINT_READONLY, 1, "chats");
        rooms = GrabObject(DbJson(ref), 1, "rooms");
        chat_id = StrDuplicate(GrabString(rooms, 1, potential_id));
        DbUnlock(parsee, ref);

        DeletePlumbID(parsee, chat_id);
        Free(chat_id);
        
        return;
    }

    /* Try to parse it as a chat ID */
    DeletePlumbID(parsee, potential_id);
}
static void
ListPlumbs(Db *parsee)
{
    DbRef *ref;
    HashMap *mucs;

    char *muc;
    JsonValue *value;
    if (!parsee)
    {
        return;
    }

    ref = DbLockIntent(parsee, DB_HINT_READONLY, 1, "chats");
    mucs = GrabObject(DbJson(ref), 1, "mucs");
    while (HashMapIterate(mucs, &muc, (void **) &value))
    {
        char *chat_id = JsonValueAsString(value);
        DbRef *chat_id_ref = DbLockIntent(parsee, DB_HINT_READONLY, 2, "chats", chat_id);
        char *matrix_id = GrabString(DbJson(chat_id_ref), 1, "room_id");

        /* TODO */
        Log(LOG_INFO, "- Plumb xmpp:%s <=> %s", muc, matrix_id);
        Log(LOG_INFO, "  - ID=%s", chat_id);

        DbUnlock(parsee, chat_id_ref);
    }

    DbUnlock(parsee, ref);
}

int
Main(Array *args, HashMap *env)
{
    char *db_path, *action, *exec;
    int ret = EXIT_SUCCESS;
    Db *parsee;

    exec = ArrayGet(args, 0);

    if (ArraySize(args) < 3)
    {
        Log(LOG_ERR, "Usage: %s [config] [action] <args>", exec);
        return EXIT_FAILURE;
    }

    db_path = ArrayGet(args, 1);
    action = ArrayGet(args, 2);

    parsee = GetDB(db_path);
    if (!parsee)
    {
        Log(LOG_ERR, "%s: couldn't open config '%s' or couldnt edit DB", exec, db_path);
        return EXIT_FAILURE;
    }

    if (StrEquals(action, "list") || StrEquals(action, "ls"))
    {
        ListPlumbs(parsee);
    }
    else if (StrEquals(action, "del"))
    {
        if (ArraySize(args) != 4)
        {
            Log(LOG_ERR, "%s: please show a !roomid:matrix.org, xmpp:mucid@jabber.org, or local hash", exec);
            ret = EXIT_FAILURE;
            goto end;
        }
        DeletePlumb(parsee, ArrayGet(args, 3));
    }


end:
    DbClose(parsee);
    return ret;
}