// Production - The Idle Game: Production Floor View
// High-performance fine-grained DOM mounting & updating without innerHTML teardowns

import { PRODUCTS, SECTORS, getProduct, getNextMilestone, getUnitMilestoneMultiplier } from '../data/products.js';
import { fmtCurrency, fmtNum } from '../core/formatters.js';

export function calculateMultiCost(baseCost, currentCount, multiplier) {
    const growth = 1.15;
    let countToBuy = 1;

    if (multiplier === '1') countToBuy = 1;
    else if (multiplier === '10') countToBuy = 10;
    else if (multiplier === '100') countToBuy = 100;
    else if (multiplier === 'next') {
        const nextTarget = getNextMilestone(currentCount);
        countToBuy = Math.max(1, nextTarget - currentCount);
    } else if (multiplier === 'max') {
        countToBuy = 1;
    }

    let totalCost = 0;
    for (let i = 0; i < countToBuy; i++) {
        totalCost += baseCost * Math.pow(growth, currentCount + i);
    }
    return { count: countToBuy, cost: totalCost };
}

/**
 * Mounts the production floor DOM structure ONCE
 */
export function mountProductionFloor(container, state, onAction) {
    const selectedSector = state.selectedSector || 'all';
    const buyMode = state.buyMode || '1';

    const filteredProducts = PRODUCTS.filter(p => {
        if (selectedSector === 'all') return true;
        return p.sector === selectedSector;
    });

    let html = `
        <div class="production-toolbar">
            <div class="sector-tabs-scroll">
                <button class="sector-pill ${selectedSector === 'all' ? 'active' : ''}" data-sector="all">
                    <iconify-icon icon="lucide:layout-grid"></iconify-icon>
                    <span>All Sectors</span>
                </button>
                ${SECTORS.map(s => `
                    <button class="sector-pill ${selectedSector === s.id ? 'active' : ''}" data-sector="${s.id}">
                        <iconify-icon icon="${s.icon}" style="color: ${s.color};"></iconify-icon>
                        <span>${s.name}</span>
                    </button>
                `).join('')}
            </div>
        </div>

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

    for (const p of filteredProducts) {
        const pState = state.products[p.id] || { unlocked: false, lines: 0, stock: 0, cycleProgress: 0, isBottlenecked: false };
        const sector = SECTORS.find(s => s.id === p.sector);
        const isSelected = state.selectedProductId === p.id;

        if (!pState.unlocked) {
            const canAffordUnlock = state.cash >= p.unlockCost;
            html += `
                <div class="facility-card locked-card ${isSelected ? 'selected' : ''}" id="card-${p.id}" data-product="${p.id}">
                    <div class="facility-header">
                        <div class="facility-icon-wrap" style="background: ${p.color}15; color: ${p.color};">
                            <iconify-icon icon="${p.icon}" class="icon-lg"></iconify-icon>
                        </div>
                        <div class="facility-title-wrap">
                            <span class="sector-badge" style="color: ${sector?.color || '#64748b'};">
                                ${sector?.name || 'Industry'} &bull; Tier ${p.tier}
                            </span>
                            <h3 class="facility-name">${p.name}</h3>
                        </div>
                    </div>
                    <p class="facility-desc">${p.description}</p>
                    <div class="locked-footer">
                        <button class="btn-primary-corp btn-unlock" id="btn-unlock-${p.id}" data-product="${p.id}" ${canAffordUnlock ? '' : 'disabled'}>
                            <iconify-icon icon="lucide:lock-open"></iconify-icon>
                            <span>Acquire Permit (${fmtCurrency(p.unlockCost)})</span>
                        </button>
                    </div>
                </div>
            `;
            continue;
        }

        const nextM = getNextMilestone(pState.lines);
        const milestoneMult = getUnitMilestoneMultiplier(pState.lines);
        const calc = calculateMultiCost(p.baseFacilityCost, pState.lines, buyMode);
        const canAffordBuy = state.cash >= calc.cost;
        const managerCost = p.baseManagerCost;
        const canAffordManager = state.cash >= managerCost;
        const logisticsCost = p.baseLogisticsCost * Math.pow(1.15, pState.logistics || 0);
        const canAffordLogistics = state.cash >= logisticsCost;

        const isRaw = !p.inputs || p.inputs.length === 0;
        let inputsHtml = '';
        if (!isRaw) {
            inputsHtml = `
                <div class="inputs-strip">
                    <span class="inputs-label">Inputs per line:</span>
                    <div class="inputs-chips">
                        ${p.inputs.map(inp => {
                            const inpProduct = getProduct(inp.id);
                            const currentStock = state.products[inp.id]?.stock || 0;
                            const neededPerLine = inp.amount * pState.lines;
                            const isLow = currentStock < neededPerLine;
                            return `
                                <span class="input-chip ${isLow ? 'low-stock' : ''}" id="chip-${p.id}-${inp.id}" title="${inpProduct?.name}">
                                    <iconify-icon icon="${inpProduct?.icon || 'lucide:box'}"></iconify-icon>
                                    ${inpProduct?.name}: <strong id="chip-val-${p.id}-${inp.id}">${fmtNum(currentStock, 0)}</strong> / ${fmtNum(neededPerLine, 0)}
                                </span>
                            `;
                        }).join('')}
                    </div>
                </div>
            `;
        }

        let statusBadge = '';
        if (pState.isBottlenecked) {
            statusBadge = `<span class="status-badge badge-warning" id="badge-${p.id}"><iconify-icon icon="lucide:alert-triangle"></iconify-icon> Waiting for Inputs</span>`;
        } else if (pState.lines > 0) {
            statusBadge = `<span class="status-badge badge-success" id="badge-${p.id}"><iconify-icon icon="lucide:check-circle"></iconify-icon> Operating (${milestoneMult}x Speed)</span>`;
        } else {
            statusBadge = `<span class="status-badge badge-idle" id="badge-${p.id}">Idle (0 Lines)</span>`;
        }

        const progressPct = Math.min(100, Math.floor((pState.cycleProgress || 0) * 100));

        html += `
            <div class="facility-card active-card ${isSelected ? 'selected' : ''}" id="card-${p.id}" data-product="${p.id}">
                <div class="facility-header">
                    <div class="facility-icon-wrap" style="background: ${p.color}15; color: ${p.color};">
                        <iconify-icon icon="${p.icon}" class="icon-lg"></iconify-icon>
                    </div>
                    <div class="facility-title-wrap">
                        <div class="facility-meta-row">
                            <span class="sector-badge" style="color: ${sector?.color || '#64748b'};">
                                ${sector?.name} &bull; Tier ${p.tier}
                            </span>
                            <div id="badge-wrap-${p.id}">${statusBadge}</div>
                        </div>
                        <h3 class="facility-name">${p.name}</h3>
                        <span class="facility-type-sub" id="type-sub-${p.id}">${p.facilityName} &bull; <strong>${pState.lines}</strong> lines (${nextM - pState.lines} to 2x)</span>
                    </div>
                </div>

                <!-- Cycle Progress Bar -->
                <div class="cycle-bar-track">
                    <div class="cycle-bar-fill" id="progress-${p.id}" style="width: ${progressPct}%; background-color: ${p.color};"></div>
                </div>

                <!-- Stock and Inventory Summary -->
                <div class="facility-stats-grid">
                    <div class="stat-cell">
                        <span class="stat-label">Stockpile:</span>
                        <span class="stat-value font-mono"><strong id="stock-${p.id}">${fmtNum(pState.stock, 0)}</strong> ${p.unit}</span>
                    </div>
                    <div class="stat-cell">
                        <span class="stat-label">Wholesale Price:</span>
                        <span class="stat-value font-mono">${fmtCurrency(p.basePrice)}</span>
                    </div>
                    <div class="stat-cell">
                        <span class="stat-label">Logistics Fleet:</span>
                        <span class="stat-value font-mono" id="logistics-${p.id}">${pState.logistics || 0} fleets</span>
                    </div>
                </div>

                ${inputsHtml}

                <!-- Facility Actions Bar -->
                <div class="facility-actions-row">
                    <button class="btn-corp-action btn-cycle" data-product="${p.id}" title="Trigger manual batch">
                        <iconify-icon icon="lucide:play"></iconify-icon>
                        <span>Run Batch</span>
                    </button>
                    
                    <button class="btn-primary-corp btn-expand" id="btn-expand-${p.id}" data-product="${p.id}" ${canAffordBuy ? '' : 'disabled'}>
                        <iconify-icon icon="lucide:plus-circle"></iconify-icon>
                        <span id="btn-expand-text-${p.id}">+${calc.count} Lines (${fmtCurrency(calc.cost)})</span>
                    </button>

                    ${!pState.manager ? `
                        <button class="btn-corp-secondary btn-hire-mgr" id="btn-hire-${p.id}" data-product="${p.id}" ${canAffordManager ? '' : 'disabled'} title="Automates production continuously">
                            <iconify-icon icon="lucide:user-check"></iconify-icon>
                            <span>Hire Lead (${fmtCurrency(managerCost)})</span>
                        </button>
                    ` : `
                        <span class="mgr-hired-badge" title="Automated Lead Active">
                            <iconify-icon icon="lucide:bot"></iconify-icon> Auto
                        </span>
                    `}

                    <button class="btn-corp-secondary btn-expand-logistics" id="btn-logistics-${p.id}" data-product="${p.id}" ${canAffordLogistics ? '' : 'disabled'} title="Increase passive sales capacity">
                        <iconify-icon icon="lucide:truck"></iconify-icon>
                        <span id="btn-logistics-text-${p.id}">+Logistics (${fmtCurrency(logisticsCost)})</span>
                    </button>
                </div>
            </div>
        `;
    }

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

    // Attach event listeners ONCE
    container.querySelectorAll('.sector-pill').forEach(btn => {
        btn.onclick = () => onAction({ type: 'SELECT_SECTOR', sector: btn.dataset.sector });
    });

    container.querySelectorAll('.facility-card').forEach(card => {
        card.onclick = (e) => {
            if (e.target.closest('button')) return;
            onAction({ type: 'SELECT_PRODUCT', productId: card.dataset.product });
        };
    });

    container.querySelectorAll('.btn-unlock').forEach(btn => {
        btn.onclick = () => onAction({ type: 'UNLOCK_PRODUCT', productId: btn.dataset.product });
    });

    container.querySelectorAll('.btn-cycle').forEach(btn => {
        btn.onclick = () => onAction({ type: 'MANUAL_CYCLE', productId: btn.dataset.product });
    });

    container.querySelectorAll('.btn-expand').forEach(btn => {
        btn.onclick = () => onAction({ type: 'BUY_LINES', productId: btn.dataset.product });
    });

    container.querySelectorAll('.btn-hire-mgr').forEach(btn => {
        btn.onclick = () => onAction({ type: 'HIRE_MANAGER', productId: btn.dataset.product });
    });

    container.querySelectorAll('.btn-expand-logistics').forEach(btn => {
        btn.onclick = () => onAction({ type: 'BUY_LOGISTICS', productId: btn.dataset.product });
    });
}

/**
 * Fine-grained in-place DOM updates (0% layout thrashing, 0% DOM teardown)
 */
export function updateProductionFloor(container, state) {
    const buyMode = state.buyMode || '1';
    const cash = state.cash;

    for (const p of PRODUCTS) {
        const pState = state.products[p.id];
        if (!pState) continue;

        // If card is locked: only update unlock button disabled state
        if (!pState.unlocked) {
            const btnUnlock = document.getElementById(`btn-unlock-${p.id}`);
            if (btnUnlock) {
                const canAfford = cash >= p.unlockCost;
                if (btnUnlock.disabled !== !canAfford) {
                    btnUnlock.disabled = !canAfford;
                }
            }
            continue;
        }

        // 1. Progress Bar (smooth width update)
        const elProgress = document.getElementById(`progress-${p.id}`);
        if (elProgress) {
            const progressPct = Math.min(100, Math.floor((pState.cycleProgress || 0) * 100));
            elProgress.style.width = `${progressPct}%`;
        }

        // 2. Stockpile Text
        const elStock = document.getElementById(`stock-${p.id}`);
        if (elStock) {
            const stockText = fmtNum(pState.stock, 0);
            if (elStock.textContent !== stockText) {
                elStock.textContent = stockText;
            }
        }

        // 3. Status Badge (only update if bottlenecked state changed)
        const elBadge = document.getElementById(`badge-${p.id}`);
        if (elBadge) {
            const isBottlenecked = pState.isBottlenecked;
            const hasWarning = elBadge.classList.contains('badge-warning');
            if (isBottlenecked && !hasWarning) {
                elBadge.className = 'status-badge badge-warning';
                elBadge.innerHTML = `<iconify-icon icon="lucide:alert-triangle"></iconify-icon> Waiting for Inputs`;
            } else if (!isBottlenecked && hasWarning) {
                const milestoneMult = getUnitMilestoneMultiplier(pState.lines);
                elBadge.className = 'status-badge badge-success';
                elBadge.innerHTML = `<iconify-icon icon="lucide:check-circle"></iconify-icon> Operating (${milestoneMult}x Speed)`;
            }
        }

        // 4. Input Chips Stock
        if (p.inputs && p.inputs.length > 0) {
            for (const inp of p.inputs) {
                const currentStock = state.products[inp.id]?.stock || 0;
                const elChipVal = document.getElementById(`chip-val-${p.id}-${inp.id}`);
                if (elChipVal) {
                    const textVal = fmtNum(currentStock, 0);
                    if (elChipVal.textContent !== textVal) {
                        elChipVal.textContent = textVal;
                    }
                }
                const elChip = document.getElementById(`chip-${p.id}-${inp.id}`);
                if (elChip) {
                    const needed = inp.amount * pState.lines;
                    const isLow = currentStock < needed;
                    elChip.classList.toggle('low-stock', isLow);
                }
            }
        }

        // 5. Expand Button disabled state
        const calc = calculateMultiCost(p.baseFacilityCost, pState.lines, buyMode);
        const elBtnExpand = document.getElementById(`btn-expand-${p.id}`);
        if (elBtnExpand) {
            const canAfford = cash >= calc.cost;
            if (elBtnExpand.disabled !== !canAfford) {
                elBtnExpand.disabled = !canAfford;
            }
        }

        // 6. Hire Manager disabled state
        const elBtnHire = document.getElementById(`btn-hire-${p.id}`);
        if (elBtnHire) {
            const canAfford = cash >= p.baseManagerCost;
            if (elBtnHire.disabled !== !canAfford) {
                elBtnHire.disabled = !canAfford;
            }
        }

        // 7. Logistics Button disabled state
        const logisticsCost = p.baseLogisticsCost * Math.pow(1.15, pState.logistics || 0);
        const elBtnLogistics = document.getElementById(`btn-logistics-${p.id}`);
        if (elBtnLogistics) {
            const canAfford = cash >= logisticsCost;
            if (elBtnLogistics.disabled !== !canAfford) {
                elBtnLogistics.disabled = !canAfford;
            }
        }

        // 8. Selected Card class
        const elCard = document.getElementById(`card-${p.id}`);
        if (elCard) {
            const isSelected = state.selectedProductId === p.id;
            elCard.classList.toggle('selected', isSelected);
        }
    }
}