"use strict";

const {strict: assert} = require("assert");

const {set_global, zrequire} = require("../zjsunit/namespace");
const {make_stub, with_stub} = require("../zjsunit/stub");
const {run_test} = require("../zjsunit/test");

const events = require("./lib/events");

const event_fixtures = events.fixtures;
const test_user = events.test_user;

set_global("compose_fade", {});
set_global("stream_events", {});
set_global("subs", {});

const peer_data = zrequire("peer_data");
const people = zrequire("people");

const stream_data = zrequire("stream_data");
const server_events_dispatch = zrequire("server_events_dispatch");

people.add_active_user(test_user);

const dispatch = server_events_dispatch.dispatch_normal_event;

function test(label, f) {
    stream_data.clear_subscriptions();

    run_test(label, (override) => {
        f(override);
    });
}

test("add", (override) => {
    const event = event_fixtures.subscription__add;

    const sub = event.subscriptions[0];
    const stream_id = sub.stream_id;

    stream_data.add_sub({
        stream_id,
        name: sub.name,
    });

    with_stub((subscription_stub) => {
        override("stream_events.mark_subscribed", subscription_stub.f);
        dispatch(event);
        const args = subscription_stub.get_args("sub", "subscribers");
        assert.deepEqual(args.sub.stream_id, stream_id);
        assert.deepEqual(args.subscribers, event.subscriptions[0].subscribers);
    });
});

test("peer add/remove", (override) => {
    let event = event_fixtures.subscription__peer_add;

    stream_data.add_sub({
        name: "devel",
        stream_id: event.stream_ids[0],
    });

    const subs_stub = make_stub();
    override("subs.update_subscribers_ui", subs_stub.f);

    const compose_fade_stub = make_stub();
    override("compose_fade.update_faded_users", compose_fade_stub.f);

    dispatch(event);
    assert.equal(compose_fade_stub.num_calls, 1);
    assert.equal(subs_stub.num_calls, 1);

    assert(peer_data.is_user_subscribed(event.stream_ids[0], event.user_ids[0]));

    event = event_fixtures.subscription__peer_remove;
    dispatch(event);
    assert.equal(compose_fade_stub.num_calls, 2);
    assert.equal(subs_stub.num_calls, 2);

    assert(!peer_data.is_user_subscribed(event.stream_ids[0], event.user_ids[0]));
});

test("remove", (override) => {
    const event = event_fixtures.subscription__remove;
    const event_sub = event.subscriptions[0];
    const stream_id = event_sub.stream_id;

    const sub = {
        stream_id,
        name: event_sub.name,
    };

    stream_data.add_sub(sub);

    with_stub((stub) => {
        override("stream_events.mark_unsubscribed", stub.f);
        dispatch(event);
        const args = stub.get_args("sub");
        assert.deepEqual(args.sub, sub);
    });
});

test("update", (override) => {
    const event = event_fixtures.subscription__update;
    with_stub((stub) => {
        override("stream_events.update_property", stub.f);
        dispatch(event);
        const args = stub.get_args("stream_id", "property", "value");
        assert.deepEqual(args.stream_id, event.stream_id);
        assert.deepEqual(args.property, event.property);
        assert.deepEqual(args.value, event.value);
    });
});

test("add error handling", (override) => {
    // test blueslip errors/warns
    const event = event_fixtures.subscription__add;
    with_stub((stub) => {
        override("blueslip.error", stub.f);
        dispatch(event);
        assert.deepEqual(stub.get_args("param").param, "Subscribing to unknown stream with ID 101");
    });
});

test("peer event error handling (bad stream_ids/user_ids)", (override) => {
    override("compose_fade.update_faded_users", () => {});

    const add_event = {
        type: "subscription",
        op: "peer_add",
        stream_ids: [8888, 9999],
        user_ids: [3333, 4444],
    };

    blueslip.expect("warn", "We have untracked stream_ids: 8888,9999");
    blueslip.expect("warn", "We have untracked user_ids: 3333,4444");
    dispatch(add_event);
    blueslip.reset();

    const remove_event = {
        type: "subscription",
        op: "peer_remove",
        stream_ids: [8888, 9999],
        user_ids: [3333, 4444],
    };

    blueslip.expect("warn", "We have untracked stream_ids: 8888,9999");
    blueslip.expect("warn", "We have untracked user_ids: 3333,4444");
    dispatch(remove_event);
});