playground_crates = [];

$( document ).ready(function() {

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        // language-rust class needs to be removed for editable
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                break;
        }
    });

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        store.set('theme', theme);

        $('body').removeClass().addClass(theme);
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    // Hide Rust code lines prepended with a specific character
    var hiding_character = "#";

    $("code.language-rust").each(function(i, block){

        var code_block = $(this);
        var pre_block = $(this).parent();
        // hide lines
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        code_block.html(lines.join(""));

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            buttons.prepend("<i class=\"fa fa-history reset-button\"></i>");
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        buttons.find(".play-button").click(function(e){
            run_rust_code(pre_block);
        });
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            hideTooltip(e.currentTarget);
        });
        buttons.find(".reset-button").click(function() {
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        }
    });
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            e.clearSelection();
            showTooltip(e.trigger, "Copied!");
    });
    clipboardSnippets.on('error', function(e) {
            showTooltip(e.trigger, "Clipboard error!");
    });

    $.ajax({
        url: "https://play.rust-lang.org/meta/crates",
        method: "POST",
        crossDomain: true,
        dataType: "json",
        contentType: "application/json",
        success: function(response){
            playground_crates = response.crates.map(function(item) {return item["id"];} );
            $(".playpen").each(function(block){
                update_play_button(this, playground_crates);
            });
        },
    });

});

function playpen_text(playpen) {
    let code_block = playpen.find("code").first();

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        let editor = window.ace.edit(code_block.get(0));
        return editor.getValue();
    } else {
        return code_block.get(0).textContent;
    }
}

function update_play_button(block, playground_crates) {
    //TODO skip if `no_run` is set
    var pre_block = $(block);
    var play_button = pre_block.find(".play-button");

    var txt = playpen_text(pre_block);

    var re = /extern\s+crate\s+([a-zA-Z_0-9]+)\s*;/g;
    var snippet_crates = [];
    while (item = re.exec(txt))
        snippet_crates.push(item[1]);

    var all_available = snippet_crates.every(elem => playground_crates.indexOf(elem) > -1);
    if (all_available) {
        play_button.removeClass("hidden");
    } else {
        play_button.addClass("hidden");
    }
}

function hideTooltip(elem) {
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    elem.setAttribute('class', 'fa fa-copy clip-button');
}

function showTooltip(elem, msg) {
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    elem.setAttribute('class', 'fa fa-copy tooltipped');
}

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            store.set('sidebar', 'hidden');
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            store.set('sidebar', 'visible');
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}

function run_rust_code(code_block) {
    var result_block = code_block.find(".result");
    if(result_block.length === 0) {
        code_block.append("<code class=\"result hljs language-bash\"></code>");
        result_block = code_block.find(".result");
    }

    let text;

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        let editor = window.ace.edit(inner_code_block.get(0));
        text = editor.getValue();
    } else {
        text = inner_code_block.text();
    }

    var params = {
        version: "stable",
        optimize: "0",
        code: text,
    };

    if(text.indexOf("#![feature") !== -1) {
        params.version = "nightly";
    }

    result_block.text("Running...");

    $.ajax({
        url: "https://play.rust-lang.org/evaluate.json",
        method: "POST",
        crossDomain: true,
        dataType: "json",
        contentType: "application/json",
        data: JSON.stringify(params),
        timeout: 15000,
        success: function(response){
            result_block.text(response.result);
        },
        error: function(qXHR, textStatus, errorThrown){
            result_block.text("Playground communication " + textStatus);
        },
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}