{% extends "global/Page.html" %}
{{ block title }}
<div style="flex:0 0 auto; text-align: right">
    <figure style="margin:0;">
        <img src="{% static 'images/ssel_logo.png' %}" width="300"/>
    </figure>
</div>
    <h2 class="fw-bold" style="text-align: center">Uniform Double Auction</h2>
{{ endblock }}

{{ block content }}

<div class="container mt-3">
    <div style="display: none;">
        {{ formfield 'player_name' }}
    </div>
    <div class="card shadow-sm border-0 mb-4" style="border-radius: 15px;">
        <div class="card-body p-4">
            <h5 class="fw-bold"><i class="bi bi-trophy text-warning"></i> Objective</h5>
            <p class="text-muted mb-0">You will participate in a market as a buyer or seller. Your goal is to <b>maximize your profit</b>.</p>
        </div>
    </div>

    <div class="row">
        <div class="col-md-7">
            <div class="card shadow-sm border-0" style="border-radius: 15px; margin-bottom: 1.05rem !important;">
                <div class="card-body p-4">

                    <ul class="list-group list-group-flush">
                        <li class="list-group-item border-0 ps-0" style="text-align: justify">
                            You will interact with other participants repeatedly for {{numRounds}} rounds. Your <strong>role</strong> is randomly assigned.
                            You keep your role for the first five rounds, then switch for the next five rounds.
                            Try to improve your decisions based on previous outcomes. At the end, we will add all your
                            profits and show a ranking of performance in the experiment.
                        </li>
                        <li class="list-group-item border-0">
                            <strong>Buyers</strong> receive a private value (maximum willingness to pay).
                        </li>
                        <li class="list-group-item border-0">
                            <strong>Sellers</strong> receive a private cost (minimum acceptable price).
                        </li>
                    </ul>
                    <br>
                    <h5 class="fw-bold mb-3" style="color: maroon">Step 1: Submit Your Price</h5>
                    <ul class="list-group list-group-flush">
                        <li class="list-group-item border-0">
                            <strong>Buyers</strong> submit one bid price: how much they are willing to pay.
                        </li>
                        <li class="list-group-item border-0">
                            <strong>Sellers</strong> submit one ask price: the price they want to be paid.
                        </li>
                    </ul>
                    <h5 class="fw-bold mt-4 mb-3" style="color: indigo">Step 2: Market Clearing</h5>
                    <p>After all submissions:</p>
                    <ol class="small">
                        <li>Bids are ranked High-to-Low.</li>
                        <li>Asks are ranked Low-to-High.</li>
                        <li>The highest buyer is matched with the lowest seller.</li>
                        <li>The second-highest buyer is matched with the second-lowest seller.</li>
                        <li>A match is successful only if the buyer's bid is <strong>&ge;</strong> the seller's ask.</li>
                        <li>This process of matching continues until the buyer's bid is lower than the seller's ask.</li>
                    </ol>
                </div>
            </div>
            <div class="alert alert-info border-0 shadow-sm" style="border-radius: 12px;">
                <h6 class="fw-bold small"><i class="bi bi-lightbulb"></i> Strategy Tips</h6>
                <ul class="mb-0 small">
                    <li><strong>Buyers:</strong> Do not bid above your value; you will lose money.</li>
                    <li><strong>Sellers:</strong> Do not ask below your cost; you will lose money.</li>
                </ul>
            </div>
        </div>

        <div class="col-md-5">
            <div class="card shadow-sm border-0 bg-light mb-4" style="border-radius: 15px; border: 1px solid #dee2e6 !important;">
                <div class="card-body p-4">
                    <h5 class="fw-bold" style="color: navy">Step 3: Market Price (P<sup>*</sup>)</h5>
                    <p class="small" style="text-align: justify">How much will you pay as a buyer? How much will you receive as a seller? A <b>single market
                        price</b> will be calculated on the basis of all submitted bids and asks. All trades occur at the same price.</p>
                    <ul>
                        <li>Look at the <b>last successful match</b>.</li>
                        <li>Take the buyer's bid and the seller's ask in that match.</li>
                        <li>The market price is the average of these two numbers.</li>
                    </ul>

                    <div class="p-3 bg-white rounded border mb-3">
                        <p class="mb-1"> <strong>Example of a Market Price:</strong></p>
                        <p class="small mb-0"><b>Bids:</b> 100, 90, 80, 70 <br>
                            <b>Asks:</b> 20, 40, 60, 85</p>
                        <ul>
                            <li>100 ≥ 20 (match)</li>
                            <li>90 ≥ 40 (match)</li>
                            <li>80 ≥ 60 (match)</li>
                            <li>70 < 85 (stop)</li>
                        </ul>

                        <p class="small mb-0">
                            The number of trades is 3. The last matched bid: 80 Last matched ask: 60. The market
price is P<sup>*</sup> = (80 + 60) / 2 = 70.
                        </p>
                    </div>

                    <h5 class="fw-bold mt-3" style="color: darkgreen">Step 4: Profit</h5>
                    <p>If you are selected among the matched traders, you will trade at the market price.</p>
                    <ul>
                        <li><p class="small mb-1"><strong>Buyer profit:</strong> Value − Market Price</p></li>
                        <li><p class="small mb-0"><strong>Seller profit:</strong> Market Price - Cost </p></li>
                    </ul>

                    <p>If you do not trade, your profit is zero.</p>
                </div>
            </div>
        </div>
    </div>

    <div class="text-center mt-4 mb-5">
        <button type="button" class="btn btn-primary btn-lg px-5" data-bs-toggle="modal" data-bs-target="#nameModal" style="border-radius: 10px;">
            Begin Experiment
        </button>
    </div>

</div>

<div class="modal fade" id="nameModal" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
        <div class="modal-content border-0 shadow" style="border-radius: 15px;">
            <div class="modal-header border-0 pb-0">
                <h5 class="modal-title fw-bold">Participant Registration</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body py-4">
                <p class="text-muted mb-3">Please enter your player name:</p>
                <input type="text" id="modal-name-input" class="form-control form-control-lg" placeholder="Your Name" style="border-radius: 10px;">
            </div>
            <div class="modal-footer border-0 pt-0">
                <button type="button" onclick="submitName()" class="btn btn-primary w-100 py-2" style="border-radius: 10px;">Start Experiment</button>
            </div>
        </div>
    </div>
</div>

<script>
    function submitName() {
        const nameVal = document.getElementById('modal-name-input').value;

        if (nameVal.trim() === "") {
            alert("Please enter a name to continue.");
        } else {
            // Transfer modal value to hidden oTree field
            document.getElementsByName('player_name')[0].value = nameVal;
            // Submit the oTree form
            document.getElementById('form').submit();
        }
    }
</script>


<style>
    body { background-color: #f8f9fa; }
    .list-group-item { background: transparent; }
    .otree-footer, .footer {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        padding: 0 !important;
    }
</style>
{{ endblock }}