var utils = require("../utils");

function formatEventReminders(reminder) {
    return {
        reminderID: reminder.id,
        eventCreatorID: reminder.lightweight_event_creator.id,
        time: reminder.time,
        eventType: reminder.lightweight_event_type.toLowerCase(),
        locationName: reminder.location_name,
        locationCoordinates: reminder.location_coordinates,
        locationPage: reminder.location_page,
        eventStatus: reminder.lightweight_event_status.toLowerCase(),
        note: reminder.note,
        repeatMode: reminder.repeat_mode.toLowerCase(),
        eventTitle: reminder.event_title,
        triggerMessage: reminder.trigger_message,
        secondsToNotifyBefore: reminder.seconds_to_notify_before,
        allowsRsvp: reminder.allows_rsvp,
        relatedEvent: reminder.related_event,
        members: reminder.event_reminder_members.edges.map(member => ({
            memberID: member.node.id,
            state: member.guest_list_state.toLowerCase()
        }))
    }
}

function formatThreadGraphQLResponse(data) {
    var messageThread = data.message_thread;
    if (!messageThread) return {}

    var threadID = messageThread.thread_key.thread_fbid || messageThread.thread_key.other_user_id;

    var lastM = messageThread.last_message;
    var snippetID = lastM && lastM.nodes && lastM.nodes[0] && lastM.nodes[0].message_sender && lastM.nodes[0].message_sender.messaging_actor ? lastM.nodes[0].message_sender.messaging_actor.id : null;
    var snippetText = lastM && lastM.nodes && lastM.nodes[0] ? lastM.nodes[0].snippet : null;
    var lastR = messageThread.last_read_receipt;
    var lastReadTimestamp = lastR && lastR.nodes && lastR.nodes[0] && lastR.nodes[0].timestamp_precise ? lastR.nodes[0].timestamp_precise : null;

    return {
        threadID: threadID,
        threadName: messageThread.name,
        participantIDs: messageThread.all_participants.edges.map(d => d.node.messaging_actor.id),
        userInfo: messageThread.all_participants.edges.map(d => ({
            id: d.node.messaging_actor.id,
            name: d.node.messaging_actor.name,
            firstName: d.node.messaging_actor.short_name,
            vanity: d.node.messaging_actor.username,
            thumbSrc: d.node.messaging_actor.big_image_src.uri,
            profileUrl: d.node.messaging_actor.big_image_src.uri,
            gender: d.node.messaging_actor.gender,
            type: d.node.messaging_actor.__typename,
            isFriend: d.node.messaging_actor.is_viewer_friend,
            isBirthday: !!d.node.messaging_actor.is_birthday
        })),
        unreadCount: messageThread.unread_count,
        messageCount: messageThread.messages_count,
        timestamp: messageThread.updated_time_precise,
        muteUntil: messageThread.mute_until,
        isGroup: messageThread.thread_type == "GROUP",
        isSubscribed: messageThread.is_viewer_subscribed,
        isArchived: messageThread.has_viewer_archived,
        folder: messageThread.folder,
        cannotReplyReason: messageThread.cannot_reply_reason,
        eventReminders: messageThread.event_reminders ? messageThread.event_reminders.nodes.map(formatEventReminders) : null,
        emoji: messageThread.customization_info ? messageThread.customization_info.emoji : null,
        color: messageThread.customization_info && messageThread.customization_info.outgoing_bubble_color ? messageThread.customization_info.outgoing_bubble_color.slice(2) : null,
        nicknames:
            messageThread.customization_info &&
                messageThread.customization_info.participant_customizations
                ? messageThread.customization_info.participant_customizations.reduce(function (res, val) {
                    if (val.nickname) res[val.participant_id] = val.nickname;
                    return res;
                }, {})
                : {},
        adminIDs: messageThread.thread_admins,
        approvalMode: Boolean(messageThread.approval_mode),
        approvalQueue: messageThread.group_approval_queue.nodes.map(a => ({
            inviterID: a.inviter.id,
            requesterID: a.requester.id,
            timestamp: a.request_timestamp,
            request_source: a.request_source
        })),
        reactionsMuteMode: messageThread.reactions_mute_mode.toLowerCase(),
        mentionsMuteMode: messageThread.mentions_mute_mode.toLowerCase(),
        isPinProtected: messageThread.is_pin_protected,
        relatedPageThread: messageThread.related_page_thread,
        name: messageThread.name,
        snippet: snippetText,
        snippetSender: snippetID,
        snippetAttachments: [],
        serverTimestamp: messageThread.updated_time_precise,
        imageSrc: messageThread.image ? messageThread.image.uri : null,
        isCanonicalUser: messageThread.is_canonical_neo_user,
        isCanonical: messageThread.thread_type != "GROUP",
        recipientsLoadable: true,
        hasEmailParticipant: false,
        readOnly: false,
        canReply: messageThread.cannot_reply_reason == null,
        lastMessageTimestamp: messageThread.last_message ? messageThread.last_message.timestamp_precise : null,
        lastMessageType: "message",
        lastReadTimestamp: lastReadTimestamp,
        threadType: messageThread.thread_type == "GROUP" ? 2 : 1,
        inviteLink: {
            enable: messageThread.joinable_mode ? messageThread.joinable_mode.mode == 1 : false,
            link: messageThread.joinable_mode ? messageThread.joinable_mode.link : null
        }
    }
}

module.exports = function (http, apis, ctx) {
    return function getThreadInfo(threadIDs, callback) {
        var pCallback;
        var returnPromise = new Promise(function (resolve, reject) {
            pCallback = (error, data) => error ? reject(error) : resolve(data);
        });

        if (typeof callback !== "function") callback = pCallback;
        if (!Array.isArray(threadIDs)) threadIDs = [threadIDs];

        var form = {}
        threadIDs.map((id, i) => form["o" + i] = {
            doc_id: "3449967031715030",
            query_params: {
                id,
                message_limit: 0,
                load_messages: false,
                load_read_receipts: false,
                before: null
            }
        });

        form = {
            queries: JSON.stringify(form),
            batch_name: "MessengerGraphQLThreadFetcher"
        }

        http
            .post("https://www.facebook.com/api/graphqlbatch/", ctx.jar, form)
            .then(utils.parseAndCheckLogin(ctx, http))
            .then(function (resData) {
                if (resData.error) throw resData;
                var threadInfos = {}
                for (let i = resData.length - 2; i >= 0; i--) {
                    var threadInfo = formatThreadGraphQLResponse(resData[i][Object.keys(resData[i])[0]].data);
                    threadInfos[threadInfo.threadID] = threadInfo;
                }
                if (Object.values(threadInfos).length === 1) {
                    callback(null, Object.values(threadInfos)[0]);
                }
                else {
                    callback(null, threadInfos);
                }
            })
            .catch(function (error) {
                if (error.type === "logout.")
                    ctx.isLogin = false;
                console.log(error);
                return callback(error);
            });

        return returnPromise;
    }
}