// Production - The Idle Game: B2B Procurement Contracts Board
// Fine-grained DOM updates without innerHTML teardowns

import { getProduct } from '../data/products.js';
import { getClient } from '../data/contracts.js';
import { fmtCurrency, fmtNum, fmtTime } from '../core/formatters.js';

let currentMountedContractUids = '';

export function mountContractsBoard(container, state, onAction) {
    const contracts = state.activeContracts || [];
    currentMountedContractUids = contracts.map(c => c.uid).join(',');

    let html = `
        <div class="contracts-header-pane">
            <div class="contracts-header-info">
                <h2 class="view-title">
                    <iconify-icon icon="lucide:scroll-text" class="title-icon"></iconify-icon>
                    B2B Corporate Procurement Tenders
                </h2>
                <p class="view-subtitle">
                    Supply high-priority commodity shipments to corporate clients for massive cash injections and corporate prestige.
                </p>
            </div>
            <div class="contracts-meta-badge">
                <span>Ready to Deliver:</span>
                <strong id="contract-stats-ready" class="font-mono text-profit">${state.readyContractsCount || 0}</strong>
                <span style="margin-left: 8px; border-left: 1px solid var(--border-color); padding-left: 8px;">Completed:</span>
                <strong id="contract-stats-completed" class="font-mono">${state.stats.contractsCompleted || 0}</strong>
            </div>
        </div>

        <div class="contracts-grid">
    `;

    if (contracts.length === 0) {
        html += `
            <div class="empty-contracts-card">
                <iconify-icon icon="lucide:clock" class="empty-icon"></iconify-icon>
                <h3>Awaiting New Tenders</h3>
                <p>Corporate procurement agents are preparing new commodity RFPs...</p>
            </div>
        `;
    }

    for (const c of contracts) {
        const client = getClient(c.clientId);
        const product = getProduct(c.productId);
        const currentStock = state.products[c.productId]?.stock || 0;
        const canFulfill = currentStock >= c.targetAmount;
        const progressPct = Math.min(100, Math.floor((currentStock / c.targetAmount) * 100));

        html += `
            <div class="contract-card ${canFulfill ? 'ready-to-fulfill' : ''}" id="contract-${c.uid}">
                <div class="contract-client-row">
                    <div class="client-brand">
                        <div class="client-avatar">
                            <iconify-icon icon="${client.icon}"></iconify-icon>
                        </div>
                        <div>
                            <h4 class="client-name">${client.name}</h4>
                            <span class="client-badge">${client.badge}</span>
                        </div>
                    </div>
                    <div class="contract-timer font-mono ${c.remainingSeconds < 60 ? 'timer-urgent' : ''}" id="timer-box-${c.uid}">
                        <iconify-icon icon="lucide:timer"></iconify-icon>
                        <span id="timer-val-${c.uid}">${fmtTime(c.remainingSeconds)}</span>
                    </div>
                </div>

                <div class="contract-body">
                    <h3 class="contract-title">${c.title}</h3>
                    <div class="contract-req-row">
                        <div class="contract-req-item">
                            <span class="req-label">Required Commodity:</span>
                            <div class="req-val-wrap">
                                <iconify-icon icon="${product?.icon || 'lucide:box'}" style="color: ${product?.color || '#2563eb'};"></iconify-icon>
                                <strong>${product?.name}</strong>
                            </div>
                        </div>
                        <div class="contract-req-progress font-mono">
                            <span id="c-curr-stock-${c.uid}">${fmtNum(currentStock, 0)}</span> / <strong>${fmtNum(c.targetAmount, 0)}</strong> ${product?.unit || 'units'}
                        </div>
                    </div>

                    <div class="contract-progress-track">
                        <div class="contract-progress-fill" id="c-fill-${c.uid}" style="width: ${progressPct}%;"></div>
                    </div>

                    <div class="contract-payout-box">
                        <div class="payout-col">
                            <span class="payout-label">Contract Payout:</span>
                            <span class="payout-val font-mono">${fmtCurrency(c.rewardCash)}</span>
                        </div>
                        <div class="payout-col">
                            <span class="payout-label">Corporate Rep:</span>
                            <span class="payout-val font-mono">+${c.rewardRep} Rep</span>
                        </div>
                    </div>
                </div>

                <div class="contract-footer">
                    <button class="btn-primary-corp btn-fulfill-contract" id="c-btn-${c.uid}" data-uid="${c.uid}" ${canFulfill ? '' : 'disabled'}>
                        <iconify-icon icon="lucide:check-check"></iconify-icon>
                        <span id="c-btn-text-${c.uid}">${canFulfill ? 'Deliver Shipment & Collect Payout' : `Fulfill Tender (Need ${fmtNum(c.targetAmount - currentStock, 0)} more)`}</span>
                    </button>
                </div>
            </div>
        `;
    }

    html += `</div>`;
    container.innerHTML = html;

    container.querySelectorAll('.btn-fulfill-contract').forEach(btn => {
        btn.onclick = () => onAction({ type: 'FULFILL_CONTRACT', uid: btn.dataset.uid });
    });
}

export function updateContractsBoard(container, state, onAction) {
    const contracts = state.activeContracts || [];
    const currentUids = contracts.map(c => c.uid).join(',');

    // If active contracts changed (added, completed, expired), remount cleanly
    if (currentUids !== currentMountedContractUids) {
        mountContractsBoard(container, state, onAction);
        return;
    }

    const elStatsReady = document.getElementById('contract-stats-ready');
    if (elStatsReady) {
        const val = String(state.readyContractsCount || 0);
        if (elStatsReady.textContent !== val) elStatsReady.textContent = val;
    }

    const elStatsCompleted = document.getElementById('contract-stats-completed');
    if (elStatsCompleted) {
        const val = String(state.stats?.contractsCompleted || 0);
        if (elStatsCompleted.textContent !== val) elStatsCompleted.textContent = val;
    }

    for (const c of contracts) {
        const currentStock = state.products[c.productId]?.stock || 0;
        const canFulfill = currentStock >= c.targetAmount;
        const progressPct = Math.min(100, Math.floor((currentStock / c.targetAmount) * 100));

        // Timer
        const elTimerVal = document.getElementById(`timer-val-${c.uid}`);
        if (elTimerVal) elTimerVal.textContent = fmtTime(c.remainingSeconds);

        const elTimerBox = document.getElementById(`timer-box-${c.uid}`);
        if (elTimerBox) {
            elTimerBox.classList.toggle('timer-urgent', c.remainingSeconds < 60);
        }

        // Current Stock Text
        const elCurrStock = document.getElementById(`c-curr-stock-${c.uid}`);
        if (elCurrStock) elCurrStock.textContent = fmtNum(currentStock, 0);

        // Progress bar
        const elFill = document.getElementById(`c-fill-${c.uid}`);
        if (elFill) elFill.style.width = `${progressPct}%`;

        // Card fulfill class
        const elCard = document.getElementById(`contract-${c.uid}`);
        if (elCard) elCard.classList.toggle('ready-to-fulfill', canFulfill);

        // Button disabled & text
        const elBtn = document.getElementById(`c-btn-${c.uid}`);
        if (elBtn) {
            elBtn.disabled = !canFulfill;
            const elBtnText = document.getElementById(`c-btn-text-${c.uid}`);
            if (elBtnText) {
                elBtnText.textContent = canFulfill
                    ? 'Deliver Shipment & Collect Payout'
                    : `Fulfill Tender (Need ${fmtNum(c.targetAmount - currentStock, 0)} more)`;
            }
        }
    }
}