import { PRODUCTS, SECTORS, getProduct } from '../data/products.js';
import { fmtCurrency, fmtNum } from '../core/formatters.js';
import { computeProductNetFlow } from './production/ratesCalculator.js';

let currentMountedProductId = null;

export function mountInspector(container, state, onAction) {
    const selectedId = state.selectedProductId || 'wheat';
    const product = getProduct(selectedId) || PRODUCTS[0];
    const pState = state.products[product.id] || { stock: 0, lines: 0, logistics: 0, unlocked: false };
    const sector = SECTORS.find(s => s.id === product.sector);
    currentMountedProductId = product.id;

    // Downstream products that consume this product
    const downstream = PRODUCTS.filter(p => p.inputs && p.inputs.some(inp => inp.id === product.id));

    const totalLiquidationValue = (pState.stock || 0) * product.basePrice;
    const halfLiquidationValue = totalLiquidationValue * 0.5;
    const netFlow = computeProductNetFlow(product, state);

    let html = `
        <div class="inspector-card">
            <div class="inspector-header">
                <div class="inspector-badge-row">
                    <span class="sector-tag" style="background: ${product.color}15; color: ${product.color};">
                        <iconify-icon icon="${product.icon}"></iconify-icon> ${sector?.name}
                    </span>
                    <span class="tier-tag">Tier ${product.tier}</span>
                </div>
                <h3 class="inspector-title">${product.name}</h3>
                <p class="inspector-desc">${product.description}</p>
            </div>

            <!-- Real-time metrics grid -->
            <div class="inspector-metrics-grid">
                <div class="metric-box">
                    <span class="metric-label">Warehouse Stock:</span>
                    <strong class="metric-val font-mono" id="insp-stock">${fmtNum(pState.stock, 0)} ${product.unit}</strong>
                </div>
                <div class="metric-box">
                    <span class="metric-label">Wholesale Price:</span>
                    <strong class="metric-val font-mono">${fmtCurrency(product.basePrice)}</strong>
                </div>
                <div class="metric-box">
                    <span class="metric-label">Net Supply Flow:</span>
                    <strong class="metric-val font-mono ${netFlow.netRate < -0.05 ? 'text-warning' : 'text-profit'}" id="insp-net-rate">
                        ${netFlow.netRate > 0.01 ? '+' : ''}${fmtNum(netFlow.netRate, 1)}/s
                    </strong>
                </div>
                <div class="metric-box">
                    <span class="metric-label">Logistics Fleets:</span>
                    <strong class="metric-val font-mono" id="insp-logistics">${pState.logistics || 0} active (${fmtNum((pState.logistics || 0) * 0.75, 2)}/s)</strong>
                </div>
            </div>

            <!-- Distribution Fleet & Downstream Supply Policies -->
            <div class="inspector-section">
                <h4 class="section-heading">
                    <iconify-icon icon="lucide:sliders"></iconify-icon> Supply & Distribution Policies
                </h4>
                <div class="liquidation-buttons">
                    <button class="btn-corp-secondary" id="insp-btn-toggle-logistics" data-product="${product.id}" title="Toggle Wholesale Fleet on/off">
                        <span class="liquidation-btn-label">
                            <iconify-icon icon="${(pState.logisticsEnabled !== false) ? 'lucide:truck' : 'lucide:truck-x'}"></iconify-icon> Wholesale Fleet
                        </span>
                        <span class="liquidation-btn-val" id="insp-toggle-log-status" style="color: ${(pState.logisticsEnabled !== false) ? 'var(--emerald-dark)' : 'var(--amber-dark)'};">
                            ${(pState.logisticsEnabled !== false) ? 'ACTIVE' : 'PAUSED'}
                        </span>
                    </button>
                    <button class="btn-corp-secondary" id="insp-btn-toggle-downstream" data-product="${product.id}" title="Toggle Raw Delivery to Downstream Consumers on/off">
                        <span class="liquidation-btn-label">
                            <iconify-icon icon="${(pState.supplyDownstreamEnabled !== false) ? 'lucide:git-pull-request' : 'lucide:git-pull-request-closed'}"></iconify-icon> Downstream
                        </span>
                        <span class="liquidation-btn-val" id="insp-toggle-down-status" style="color: ${(pState.supplyDownstreamEnabled !== false) ? 'var(--emerald-dark)' : 'var(--amber-dark)'};">
                            ${(pState.supplyDownstreamEnabled !== false) ? 'ALLOWED' : 'BLOCKED'}
                        </span>
                    </button>
                </div>
            </div>

            <!-- Instant Wholesale Market Liquidation -->
            <div class="inspector-section">
                <h4 class="section-heading">
                    <iconify-icon icon="lucide:dollar-sign"></iconify-icon> Instant Wholesale Liquidation
                </h4>
                <p class="section-subtext">Liquidate stockpiles immediately onto the wholesale spot market.</p>
                <div class="liquidation-buttons">
                    <button class="btn-corp-secondary" id="insp-btn-half" data-product="${product.id}" ${pState.stock >= 2 ? '' : 'disabled'}>
                        <span class="liquidation-btn-label">
                            <iconify-icon icon="lucide:pie-chart"></iconify-icon> Sell 50%
                        </span>
                        <span class="liquidation-btn-val" id="insp-val-half">${fmtCurrency(halfLiquidationValue)}</span>
                    </button>
                    <button class="btn-primary-corp" id="insp-btn-all" data-product="${product.id}" ${pState.stock >= 1 ? '' : 'disabled'}>
                        <span class="liquidation-btn-label">
                            <iconify-icon icon="lucide:check-circle-2"></iconify-icon> Sell 100%
                        </span>
                        <span class="liquidation-btn-val" id="insp-val-all">${fmtCurrency(totalLiquidationValue)}</span>
                    </button>
                </div>
            </div>

            <!-- Upstream & Downstream Supply Chain Flow -->
            <div class="inspector-section">
                <h4 class="section-heading">
                    <iconify-icon icon="lucide:git-fork"></iconify-icon> Supply Chain Dependencies
                </h4>

                <!-- Inputs (Upstream) -->
                <div class="chain-box">
                    <span class="chain-title">Direct Inputs:</span>
                    ${(!product.inputs || product.inputs.length === 0) ? `
                        <div class="chain-empty">Primary commodity &bull; Direct extraction from natural deposits.</div>
                    ` : `
                        <div class="chain-items">
                            ${product.inputs.map(inp => {
                                const parent = getProduct(inp.id);
                                const parentStock = state.products[inp.id]?.stock || 0;
                                return `
                                    <div class="chain-item-row" data-product="${parent.id}">
                                        <div class="chain-item-left">
                                            <iconify-icon icon="${parent.icon}" style="color: ${parent.color};"></iconify-icon>
                                            <span>${parent.name}</span>
                                        </div>
                                        <span class="chain-item-ratio font-mono">${inp.amount} per unit (<strong id="insp-inp-val-${inp.id}">${fmtNum(parentStock, 0)}</strong> on hand)</span>
                                    </div>
                                `;
                            }).join('')}
                        </div>
                    `}
                </div>

                <!-- Downstream Consumers -->
                <div class="chain-box">
                    <span class="chain-title">Downstream Consumers:</span>
                    ${downstream.length === 0 ? `
                        <div class="chain-empty">End-tier consumer or industrial finished product.</div>
                    ` : `
                        <div class="chain-items">
                            ${downstream.map(child => {
                                const isUnlocked = state.products[child.id]?.unlocked;
                                return `
                                    <div class="chain-item-row" data-product="${child.id}">
                                        <div class="chain-item-left">
                                            <iconify-icon icon="${child.icon}" style="color: ${child.color};"></iconify-icon>
                                            <span>${child.name}</span>
                                        </div>
                                        <span class="chain-badge ${isUnlocked ? 'badge-open' : 'badge-locked'}" id="insp-child-${child.id}">
                                            ${isUnlocked ? 'Active' : 'Locked'}
                                        </span>
                                    </div>
                                `;
                            }).join('')}
                        </div>
                    `}
                </div>
            </div>
        </div>
    `;

    container.innerHTML = html;

    const halfBtn = container.querySelector('#insp-btn-half');
    if (halfBtn) {
        halfBtn.onclick = () => onAction({ type: 'LIQUIDATE_STOCK', productId: product.id, ratio: 0.5 });
    }

    const allBtn = container.querySelector('#insp-btn-all');
    if (allBtn) {
        allBtn.onclick = () => onAction({ type: 'LIQUIDATE_STOCK', productId: product.id, ratio: 1.0 });
    }

    const toggleLogBtn = container.querySelector('#insp-btn-toggle-logistics');
    if (toggleLogBtn) {
        toggleLogBtn.onclick = () => onAction({ type: 'TOGGLE_LOGISTICS', productId: product.id });
    }

    const toggleDownBtn = container.querySelector('#insp-btn-toggle-downstream');
    if (toggleDownBtn) {
        toggleDownBtn.onclick = () => onAction({ type: 'TOGGLE_DOWNSTREAM_SUPPLY', productId: product.id });
    }

    container.querySelectorAll('.chain-item-row').forEach(row => {
        row.onclick = () => onAction({ type: 'SELECT_PRODUCT', productId: row.dataset.product });
    });
}

export function updateInspector(container, state) {
    const selectedId = state.selectedProductId || 'wheat';
    if (selectedId !== currentMountedProductId) {
        return; // Caller should remount if product changed
    }

    const product = getProduct(selectedId);
    if (!product) return;
    const pState = state.products[product.id] || { stock: 0, lines: 0, logistics: 0 };

    // Update stock text
    const elStock = document.getElementById('insp-stock');
    if (elStock) {
        elStock.textContent = `${fmtNum(pState.stock, 0)} ${product.unit}`;
    }

    // Update policy statuses
    const isLogActive = pState.logisticsEnabled !== false;
    const elLogStatus = document.getElementById('insp-toggle-log-status');
    if (elLogStatus) {
        elLogStatus.textContent = isLogActive ? 'ACTIVE' : 'PAUSED';
        elLogStatus.style.color = isLogActive ? 'var(--emerald-dark)' : 'var(--amber-dark)';
    }

    const isDownActive = pState.supplyDownstreamEnabled !== false;
    const elDownStatus = document.getElementById('insp-toggle-down-status');
    if (elDownStatus) {
        elDownStatus.textContent = isDownActive ? 'ALLOWED' : 'BLOCKED';
        elDownStatus.style.color = isDownActive ? 'var(--emerald-dark)' : 'var(--amber-dark)';
    }

    // Update liquidation values & buttons
    const totalLiquidationValue = (pState.stock || 0) * product.basePrice;
    const halfLiquidationValue = totalLiquidationValue * 0.5;

    const elHalfVal = document.getElementById('insp-val-half');
    if (elHalfVal) elHalfVal.textContent = fmtCurrency(halfLiquidationValue);

    const elAllVal = document.getElementById('insp-val-all');
    if (elAllVal) elAllVal.textContent = fmtCurrency(totalLiquidationValue);

    const btnHalf = document.getElementById('insp-btn-half');
    if (btnHalf) btnHalf.disabled = pState.stock < 2;

    const btnAll = document.getElementById('insp-btn-all');
    if (btnAll) btnAll.disabled = pState.stock < 1;

    // Update Net Flow rate
    const netFlow = computeProductNetFlow(product, state);
    const elNetRate = document.getElementById('insp-net-rate');
    if (elNetRate) {
        const sign = netFlow.netRate > 0.01 ? '+' : '';
        const netText = `${sign}${fmtNum(netFlow.netRate, 1)}/s`;
        if (elNetRate.textContent !== netText) {
            elNetRate.textContent = netText;
        }
        const isDeficit = netFlow.netRate < -0.05;
        const isSurplus = netFlow.netRate > 0.05;
        elNetRate.className = `metric-val font-mono ${isDeficit ? 'text-warning' : (isSurplus ? 'text-profit' : '')}`;
    }

    // Update input values
    if (product.inputs) {
        for (const inp of product.inputs) {
            const elInp = document.getElementById(`insp-inp-val-${inp.id}`);
            if (elInp) {
                elInp.textContent = fmtNum(state.products[inp.id]?.stock || 0, 0);
            }
        }
    }
}