"use strict";

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

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

// Important note on these tests:
//
// The way the Zulip hotkey tests work is as follows.  First, we set
// up various contexts by monkey-patching the various hotkeys exports
// functions (like overlays.settings_open).  Within that context, to
// test whether a given key (e.g. `x`) results in a specific function
// (e.g. `ui.foo()`), we fail to import any modules other than
// hotkey.js so that accessing them will result in a ReferenceError.
//
// Then we create a stub `ui.foo`, and call the hotkey function.  If
// it calls any external module other than `ui.foo`, it'll crash.
// Future work includes making sure it actually does call `ui.foo()`.

const emoji_codes = zrequire("emoji_codes", "generated/emoji/emoji_codes.json");

set_global("navigator", {
    platform: "",
});

set_global("page_params", {});

let overlays = set_global("overlays", {});

// jQuery stuff should go away if we make an initialize() method.
set_global("document", "document-stub");
set_global("$", make_zjquery());

const emoji = zrequire("emoji", "shared/js/emoji");

emoji.initialize({
    realm_emoji: {},
    emoji_codes,
});

const activity = zrequire("activity");
const hotkey = zrequire("hotkey");
zrequire("common");

const compose_actions = set_global("compose_actions", {});
const condense = set_global("condense", {});
const drafts = set_global("drafts", {});
const hashchange = set_global("hashchange", {});
set_global("info_overlay", {});
const lightbox = set_global("lightbox", {});
const list_util = set_global("list_util", {});
const message_edit = set_global("message_edit", {});
const muting_ui = set_global("muting_ui", {});
const narrow = set_global("narrow", {});
const navigate = set_global("navigate", {});
const reactions = set_global("reactions", {});
const search = set_global("search", {});
const stream_list = set_global("stream_list", {});
const subs = set_global("subs", {});

set_global("current_msg_list", {
    selected_id() {
        return 42;
    },
    selected_message() {
        return {
            sent_by_me: true,
            flags: ["read", "starred"],
        };
    },
    selected_row() {},
    get_row() {
        return 101;
    },
});

function return_true() {
    return true;
}
function return_false() {
    return false;
}

function stubbing(module, func_name_to_stub, test_function) {
    with_overrides((override) => {
        with_stub((stub) => {
            override(module, func_name_to_stub, stub.f);
            test_function(stub);
        });
    });
}

run_test("mappings", () => {
    function map_press(which, shiftKey) {
        return hotkey.get_keypress_hotkey({
            which,
            shiftKey,
        });
    }

    function map_down(which, shiftKey, ctrlKey, metaKey) {
        return hotkey.get_keydown_hotkey({
            which,
            shiftKey,
            ctrlKey,
            metaKey,
        });
    }

    // The next assertion protects against an iOS bug where we
    // treat "!" as a hotkey, because iOS sends the wrong code.
    assert.equal(map_press(33), undefined);

    // Test page-up does work.
    assert.equal(map_down(33).name, "page_up");

    // Test other mappings.
    assert.equal(map_down(9).name, "tab");
    assert.equal(map_down(9, true).name, "shift_tab");
    assert.equal(map_down(27).name, "escape");
    assert.equal(map_down(37).name, "left_arrow");
    assert.equal(map_down(13).name, "enter");
    assert.equal(map_down(46).name, "delete");
    assert.equal(map_down(13, true).name, "enter");

    assert.equal(map_press(47).name, "search"); // slash
    assert.equal(map_press(106).name, "vim_down"); // j

    assert.equal(map_down(219, false, true).name, "escape"); // Ctrl + [
    assert.equal(map_down(67, false, true).name, "copy_with_c"); // Ctrl + C
    assert.equal(map_down(75, false, true).name, "search_with_k"); // Ctrl + K
    assert.equal(map_down(83, false, true).name, "star_message"); // Ctrl + S
    assert.equal(map_down(190, false, true).name, "narrow_to_compose_target"); // Ctrl + .

    // More negative tests.
    assert.equal(map_down(47), undefined);
    assert.equal(map_press(27), undefined);
    assert.equal(map_down(27, true), undefined);
    assert.equal(map_down(86, false, true), undefined); // Ctrl + V
    assert.equal(map_down(90, false, true), undefined); // Ctrl + Z
    assert.equal(map_down(84, false, true), undefined); // Ctrl + T
    assert.equal(map_down(82, false, true), undefined); // Ctrl + R
    assert.equal(map_down(79, false, true), undefined); // Ctrl + O
    assert.equal(map_down(80, false, true), undefined); // Ctrl + P
    assert.equal(map_down(65, false, true), undefined); // Ctrl + A
    assert.equal(map_down(70, false, true), undefined); // Ctrl + F
    assert.equal(map_down(72, false, true), undefined); // Ctrl + H
    assert.equal(map_down(88, false, true), undefined); // Ctrl + X
    assert.equal(map_down(78, false, true), undefined); // Ctrl + N
    assert.equal(map_down(77, false, true), undefined); // Ctrl + M
    assert.equal(map_down(67, false, false, true), undefined); // Cmd + C
    assert.equal(map_down(75, false, false, true), undefined); // Cmd + K
    assert.equal(map_down(83, false, false, true), undefined); // Cmd + S
    assert.equal(map_down(75, true, true), undefined); // Shift + Ctrl + K
    assert.equal(map_down(83, true, true), undefined); // Shift + Ctrl + S
    assert.equal(map_down(219, true, true, false), undefined); // Shift + Ctrl + [

    // Cmd tests for MacOS
    navigator.platform = "MacIntel";
    assert.equal(map_down(219, false, true, false).name, "escape"); // Ctrl + [
    assert.equal(map_down(219, false, false, true), undefined); // Cmd + [
    assert.equal(map_down(67, false, true, true).name, "copy_with_c"); // Ctrl + C
    assert.equal(map_down(67, false, true, false), undefined); // Cmd + C
    assert.equal(map_down(75, false, false, true).name, "search_with_k"); // Cmd + K
    assert.equal(map_down(75, false, true, false), undefined); // Ctrl + K
    assert.equal(map_down(83, false, false, true).name, "star_message"); // Cmd + S
    assert.equal(map_down(83, false, true, false), undefined); // Ctrl + S
    assert.equal(map_down(190, false, false, true).name, "narrow_to_compose_target"); // Cmd + .
    assert.equal(map_down(190, false, true, false), undefined); // Ctrl + .
    // Reset platform
    navigator.platform = "";
});

run_test("basic_chars", () => {
    function process(s) {
        const e = {
            which: s.charCodeAt(0),
        };
        try {
            return hotkey.process_keypress(e);
        } catch (error) {
            // An exception will be thrown here if a different
            // function is called than the one declared.  Try to
            // provide a useful error message.
            // add a newline to separate from other console output.
            console.log('\nERROR: Mapping for character "' + e.which + '" does not match tests.');
            throw error;
        }
    }

    function assert_mapping(c, module, func_name, shiftKey) {
        stubbing(module, func_name, () => {
            assert(process(c, shiftKey));
        });
    }

    function assert_unmapped(s) {
        for (const c of s) {
            assert.equal(process(c), false);
        }
    }

    // Unmapped keys should immediately return false, without
    // calling any functions outside of hotkey.js.
    assert_unmapped("abfmoyz");
    assert_unmapped("BEFHILNOQTUWXYZ");

    // We have to skip some checks due to the way the code is
    // currently organized for mapped keys.
    hotkey.in_content_editable_widget = return_false;
    overlays.settings_open = return_false;

    const popovers = set_global("popovers", {
        actions_popped: return_false,
        message_info_popped: return_false,
        user_sidebar_popped: return_false,
        user_info_popped: return_false,
    });
    set_global("stream_popover", {
        stream_popped: return_false,
        topic_popped: return_false,
        all_messages_popped: return_false,
        starred_messages_popped: return_false,
    });
    const emoji_picker = set_global("emoji_picker", {
        reactions_popped: return_false,
    });
    set_global("hotspots", {
        is_open: return_false,
    });
    const gear_menu = set_global("gear_menu", {
        is_open: return_false,
    });

    // All letters should return false if we are composing text.
    hotkey.processing_text = return_true;

    function test_normal_typing() {
        assert_unmapped("abcdefghijklmnopqrsuvwxyz");
        assert_unmapped(" ");
        assert_unmapped("[]\\.,;");
        assert_unmapped("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
        assert_unmapped('~!@#$%^*()_+{}:"<>');
    }

    for (const settings_open of [return_true, return_false]) {
        for (const is_active of [return_true, return_false]) {
            for (const info_overlay_open of [return_true, return_false]) {
                overlays = set_global("overlays", {
                    is_active,
                    settings_open,
                    info_overlay_open,
                    recent_topics_open: return_false,
                });
                test_normal_typing();
            }
        }
    }

    // Ok, now test keys that work when we're viewing messages.
    hotkey.processing_text = return_false;
    overlays.settings_open = return_false;
    overlays.streams_open = return_false;
    overlays.lightbox_open = return_false;
    overlays.drafts_open = return_false;
    overlays.recent_topics = return_false;

    page_params.can_create_streams = true;
    overlays.streams_open = return_true;
    overlays.is_active = return_true;
    assert_mapping("S", subs, "keyboard_sub");
    assert_mapping("V", subs, "view_stream");
    assert_mapping("n", subs, "open_create_stream");
    page_params.can_create_streams = false;
    assert_unmapped("n");
    overlays.streams_open = return_false;
    test_normal_typing();
    overlays.is_active = return_false;

    assert_mapping("?", hashchange, "go_to_location");
    assert_mapping("/", search, "initiate_search");
    assert_mapping("w", activity, "initiate_search");
    assert_mapping("q", stream_list, "initiate_search");

    assert_mapping("A", narrow, "stream_cycle_backward");
    assert_mapping("D", narrow, "stream_cycle_forward");

    assert_mapping("c", compose_actions, "start");
    assert_mapping("x", compose_actions, "start");
    assert_mapping("P", narrow, "by");
    assert_mapping("g", gear_menu, "open");

    overlays.is_active = return_true;
    overlays.drafts_open = return_true;
    assert_mapping("d", overlays, "close_overlay");
    overlays.drafts_open = return_false;
    test_normal_typing();
    overlays.is_active = return_false;
    assert_mapping("d", drafts, "launch");

    // Test opening and closing of recent topics
    overlays.is_active = return_true;
    overlays.recent_topics_open = return_true;
    assert_mapping("t", overlays, "close_overlay");
    overlays.recent_topics_open = return_false;
    test_normal_typing();
    overlays.is_active = return_false;
    assert_mapping("t", hashchange, "go_to_location");

    // Next, test keys that only work on a selected message.
    const message_view_only_keys = "@+>RjJkKsSuvi:GM";

    // Check that they do nothing without a selected message
    current_msg_list.empty = return_true;
    assert_unmapped(message_view_only_keys);

    current_msg_list.empty = return_false;

    // Check that they do nothing while in the settings overlay
    overlays.settings_open = return_true;
    assert_unmapped("@*+->rRjJkKsSuvi:GM");
    overlays.settings_open = return_false;

    // TODO: Similar check for being in the subs page

    assert_mapping("@", compose_actions, "reply_with_mention");
    assert_mapping("+", reactions, "toggle_emoji_reaction");
    assert_mapping("-", condense, "toggle_collapse");
    assert_mapping("r", compose_actions, "respond_to_message");
    assert_mapping("R", compose_actions, "respond_to_message", true);
    assert_mapping("j", navigate, "down");
    assert_mapping("J", navigate, "page_down");
    assert_mapping("k", navigate, "up");
    assert_mapping("K", navigate, "page_up");
    assert_mapping("s", narrow, "by_recipient");
    assert_mapping("S", narrow, "by_topic");
    assert_mapping("u", popovers, "show_sender_info");
    assert_mapping("i", popovers, "open_message_menu");
    assert_mapping(":", reactions, "open_reactions_popover", true);
    assert_mapping(">", compose_actions, "quote_and_reply");
    assert_mapping("e", message_edit, "start");

    overlays.is_active = return_true;
    overlays.lightbox_open = return_true;
    assert_mapping("v", overlays, "close_overlay");
    overlays.lightbox_open = return_false;
    test_normal_typing();
    overlays.is_active = return_false;
    assert_mapping("v", lightbox, "show_from_selected_message");

    emoji_picker.reactions_popped = return_true;
    assert_mapping(":", emoji_picker, "navigate", true);
    emoji_picker.reactions_popped = return_false;

    assert_mapping("G", navigate, "to_end");
    assert_mapping("M", muting_ui, "toggle_topic_mute");

    // Test keys that work when a message is selected and
    // also when the message list is empty.
    assert_mapping("n", narrow, "narrow_to_next_topic");
    assert_mapping("p", narrow, "narrow_to_next_pm_string");

    current_msg_list.empty = return_true;
    assert_mapping("n", narrow, "narrow_to_next_topic");
    current_msg_list.empty = return_false;
});

run_test("motion_keys", () => {
    const codes = {
        down_arrow: 40,
        end: 35,
        home: 36,
        left_arrow: 37,
        right_arrow: 39,
        page_up: 33,
        page_down: 34,
        spacebar: 32,
        up_arrow: 38,
        "+": 187,
    };

    function process(name, shiftKey, ctrlKey) {
        const e = {
            which: codes[name],
            shiftKey,
            ctrlKey,
        };

        try {
            return hotkey.process_keydown(e);
        } catch (error) {
            // An exception will be thrown here if a different
            // function is called than the one declared.  Try to
            // provide a useful error message.
            // add a newline to separate from other console output.
            console.log('\nERROR: Mapping for character "' + e.which + '" does not match tests.');
            throw error;
        }
    }

    function assert_unmapped(name) {
        assert.equal(process(name), false);
    }

    function assert_mapping(key_name, module, func_name, shiftKey, ctrlKey) {
        stubbing(module, func_name, () => {
            assert(process(key_name, shiftKey, ctrlKey));
        });
    }

    list_util.inside_list = return_false;
    current_msg_list.empty = return_true;
    overlays.settings_open = return_false;
    overlays.streams_open = return_false;
    overlays.lightbox_open = return_false;

    assert_unmapped("down_arrow");
    assert_unmapped("end");
    assert_unmapped("home");
    assert_unmapped("page_up");
    assert_unmapped("page_down");
    assert_unmapped("spacebar");
    assert_unmapped("up_arrow");

    list_util.inside_list = return_true;
    assert_mapping("up_arrow", list_util, "go_up");
    assert_mapping("down_arrow", list_util, "go_down");
    list_util.inside_list = return_false;

    current_msg_list.empty = return_false;
    assert_mapping("down_arrow", navigate, "down");
    assert_mapping("end", navigate, "to_end");
    assert_mapping("home", navigate, "to_home");
    assert_mapping("left_arrow", message_edit, "edit_last_sent_message");
    assert_mapping("page_up", navigate, "page_up");
    assert_mapping("page_down", navigate, "page_down");
    assert_mapping("spacebar", navigate, "page_down");
    assert_mapping("up_arrow", navigate, "up");

    overlays.info_overlay_open = return_true;
    assert_unmapped("down_arrow");
    assert_unmapped("up_arrow");
    overlays.info_overlay_open = return_false;

    overlays.streams_open = return_true;
    assert_mapping("up_arrow", subs, "switch_rows");
    assert_mapping("down_arrow", subs, "switch_rows");
    overlays.streams_open = return_false;

    overlays.lightbox_open = return_true;
    assert_mapping("left_arrow", lightbox, "prev");
    assert_mapping("right_arrow", lightbox, "next");
    overlays.lightbox_open = return_false;

    hotkey.in_content_editable_widget = return_true;
    assert_unmapped("down_arrow");
    assert_unmapped("up_arrow");
    hotkey.in_content_editable_widget = return_false;

    overlays.settings_open = return_true;
    assert_unmapped("end");
    assert_unmapped("home");
    assert_unmapped("left_arrow");
    assert_unmapped("page_up");
    assert_unmapped("page_down");
    assert_unmapped("spacebar");
    overlays.settings_open = return_false;

    overlays.is_active = return_true;
    overlays.drafts_open = return_true;
    assert_mapping("up_arrow", drafts, "drafts_handle_events");
    assert_mapping("down_arrow", drafts, "drafts_handle_events");
    overlays.is_active = return_false;
    overlays.drafts_open = return_false;
});