"use strict";

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

const autosize = require("autosize");

const {set_global, zrequire} = require("../zjsunit/namespace");
const {run_test} = require("../zjsunit/test");
const $ = require("../zjsunit/zjquery");

set_global("document", {
    execCommand() {
        return false;
    },
});

const compose_ui = zrequire("compose_ui");
const people = zrequire("people");
const user_status = zrequire("user_status");

const alice = {
    email: "alice@zulip.com",
    user_id: 101,
    full_name: "Alice",
};
const bob = {
    email: "bob@zulip.com",
    user_id: 102,
    full_name: "Bob",
};

people.add_active_user(alice);
people.add_active_user(bob);

function make_textbox(s) {
    // Simulate a jQuery textbox for testing purposes.
    const widget = {};

    widget.s = s;
    widget.focused = false;

    widget.caret = function (arg) {
        if (typeof arg === "number") {
            widget.pos = arg;
            return this;
        }

        if (arg) {
            widget.insert_pos = widget.pos;
            widget.insert_text = arg;
            const before = widget.s.slice(0, widget.pos);
            const after = widget.s.slice(widget.pos);
            widget.s = before + arg + after;
            widget.pos += arg.length;
            return this;
        }

        return widget.pos;
    };

    widget.val = function (new_val) {
        if (new_val) {
            widget.s = new_val;
            return this;
        }
        return widget.s;
    };

    widget.trigger = function (type) {
        if (type === "focus") {
            widget.focused = true;
        } else if (type === "blur") {
            widget.focused = false;
        }
        return this;
    };

    return widget;
}

run_test("autosize_textarea", (override) => {
    const textarea_autosized = {};

    override(autosize, "update", (textarea) => {
        textarea_autosized.textarea = textarea;
        textarea_autosized.autosized = true;
    });

    // Call autosize_textarea with an argument
    const container = "container-stub";
    compose_ui.autosize_textarea(container);
    assert.equal(textarea_autosized.textarea, container);
    assert(textarea_autosized.autosized);
});

run_test("insert_syntax_and_focus", () => {
    $("#compose-textarea").val("xyz ");
    $("#compose-textarea").caret = function (syntax) {
        if (syntax !== undefined) {
            $("#compose-textarea").val($("#compose-textarea").val() + syntax);
            return this;
        }
        return 4;
    };
    compose_ui.insert_syntax_and_focus(":octopus:");
    assert.equal($("#compose-textarea").caret(), 4);
    assert.equal($("#compose-textarea").val(), "xyz :octopus: ");
    assert($("#compose-textarea").is_focused());
});

run_test("smart_insert", () => {
    let textbox = make_textbox("abc");
    textbox.caret(4);

    compose_ui.smart_insert(textbox, ":smile:");
    assert.equal(textbox.insert_pos, 4);
    assert.equal(textbox.insert_text, " :smile: ");
    assert.equal(textbox.val(), "abc :smile: ");
    assert(textbox.focused);

    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, ":airplane:");
    assert.equal(textbox.insert_text, ":airplane: ");
    assert.equal(textbox.val(), "abc :smile: :airplane: ");
    assert(textbox.focused);

    textbox.caret(0);
    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, ":octopus:");
    assert.equal(textbox.insert_text, ":octopus: ");
    assert.equal(textbox.val(), ":octopus: abc :smile: :airplane: ");
    assert(textbox.focused);

    textbox.caret(textbox.val().length);
    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, ":heart:");
    assert.equal(textbox.insert_text, ":heart: ");
    assert.equal(textbox.val(), ":octopus: abc :smile: :airplane: :heart: ");
    assert(textbox.focused);

    // Test handling of spaces for ```quote
    textbox = make_textbox("");
    textbox.caret(0);
    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, "```quote\nquoted message\n```\n");
    assert.equal(textbox.insert_text, "```quote\nquoted message\n```\n");
    assert.equal(textbox.val(), "```quote\nquoted message\n```\n");
    assert(textbox.focused);

    textbox = make_textbox("");
    textbox.caret(0);
    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, "[Quoting…]\n");
    assert.equal(textbox.insert_text, "[Quoting…]\n");
    assert.equal(textbox.val(), "[Quoting…]\n");
    assert(textbox.focused);

    textbox = make_textbox("abc");
    textbox.caret(3);
    textbox.trigger("blur");
    compose_ui.smart_insert(textbox, " test with space");
    assert.equal(textbox.insert_text, " test with space ");
    assert.equal(textbox.val(), "abc test with space ");
    assert(textbox.focused);

    // Note that we don't have any special logic for strings that are
    // already surrounded by spaces, since we are usually inserting things
    // like emojis and file links.
});

run_test("replace_syntax", () => {
    $("#compose-textarea").val("abcabc");

    compose_ui.replace_syntax("a", "A");
    assert.equal($("#compose-textarea").val(), "Abcabc");

    compose_ui.replace_syntax(/b/g, "B");
    assert.equal($("#compose-textarea").val(), "ABcaBc");

    // Verify we correctly handle `$`s in the replacement syntax
    compose_ui.replace_syntax("Bca", "$$\\pi$$");
    assert.equal($("#compose-textarea").val(), "A$$\\pi$$Bc");
});

run_test("compute_placeholder_text", () => {
    let opts = {
        message_type: "stream",
        stream: "",
        topic: "",
        private_message_recipient: "",
    };

    // Stream narrows
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Compose your message here"));

    opts.stream = "all";
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Message #all"));

    opts.topic = "Test";
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Message #all > Test"));

    // PM Narrows
    opts = {
        message_type: "private",
        stream: "",
        topic: "",
        private_message_recipient: "",
    };
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Compose your message here"));

    opts.private_message_recipient = "bob@zulip.com";
    user_status.set_status_text({
        user_id: bob.user_id,
        status_text: "out to lunch",
    });
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Message Bob (out to lunch)"));

    opts.private_message_recipient = "alice@zulip.com";
    user_status.set_status_text({
        user_id: alice.user_id,
        status_text: "",
    });
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Message Alice"));

    // Group PM
    opts.private_message_recipient = "alice@zulip.com,bob@zulip.com";
    assert.equal(compose_ui.compute_placeholder_text(opts), i18n.t("Message Alice, Bob"));
});