// 库存调整页面的JavaScript功能
document.addEventListener('DOMContentLoaded', function() {
    const changeTypeSelect = document.getElementById('change_type');
    const changeAmountInput = document.getElementById('change_amount');
    const stockHint = document.getElementById('stock-hint');

    // 当前库存数量通过HTML中的全局变量CURRENT_STOCK获取
    const currentStock = CURRENT_STOCK;

    // 当改变调整类型时，更新提示信息
    changeTypeSelect.addEventListener('change', updateStockHint);
    changeAmountInput.addEventListener('input', updateStockHint);

    function updateStockHint() {
        const changeType = changeTypeSelect.value;
        const changeAmount = parseInt(changeAmountInput.value) || 0;

        if (changeType === 'out') {
            // 出库检查
            if (changeAmount > currentStock) {
                stockHint.textContent = `警告: 出库数量(${changeAmount})超过当前库存(${currentStock})!`;
                stockHint.className = 'form-text stock-hint danger';
                changeAmountInput.setCustomValidity('出库数量不能超过当前库存');
            } else {
                const newStock = currentStock - changeAmount;
                stockHint.textContent = `出库后库存将变为: ${newStock}`;
                stockHint.className = 'form-text stock-hint';
                changeAmountInput.setCustomValidity('');

                if (newStock <= 5 && newStock > 0) {
                    stockHint.classList.add('warning');
                } else if (newStock <= 0) {
                    stockHint.classList.add('danger');
                }
            }
        } else {
            // 入库提示
            const newStock = currentStock + changeAmount;
            stockHint.textContent = `入库后库存将变为: ${newStock}`;
            stockHint.className = 'form-text stock-hint';
            changeAmountInput.setCustomValidity('');
        }

        // 添加一些迪士尼风格的交互效果
        addDisneyInteractions();
    }

    // 添加迪士尼风格的交互效果
    function addDisneyInteractions() {
        // 闪光效果
        const sparkleEffect = document.querySelector('.disney-sparkles');
        if (sparkleEffect) {
            sparkleEffect.style.opacity = '0.7';
            setTimeout(() => { sparkleEffect.style.opacity = '0'; }, 800);
        }

        // 按钮动画效果
        const confirmBtn = document.querySelector('.disney-confirm-btn');
        if (confirmBtn) {
            confirmBtn.classList.add('active');
            setTimeout(() => { confirmBtn.classList.remove('active'); }, 300);
        }
    }

    // 初始化提示
    updateStockHint();

    // 表单提交前验证
    document.querySelector('form').addEventListener('submit', function(event) {
        const changeType = changeTypeSelect.value;
        const changeAmount = parseInt(changeAmountInput.value) || 0;

        if (changeType === 'out' && changeAmount > currentStock) {
            event.preventDefault();
            alert('出库数量不能超过当前库存!');
            return false;
        }

        if (changeAmount <= 0) {
            event.preventDefault();
            alert('调整数量必须大于0!');
            return false;
        }

        // 添加提交成功的动画效果
        const card = document.querySelector('.disney-inventory-card');
        if (card) {
            card.classList.add('submitting');
        }
    });

    // 为表单元素添加迪士尼风格的交互效果
    const formElements = document.querySelectorAll('.disney-select, .disney-input, .disney-textarea');
    formElements.forEach(element => {
        element.addEventListener('focus', function() {
            this.parentNode.classList.add('focused');
        });

        element.addEventListener('blur', function() {
            this.parentNode.classList.remove('focused');
        });
    });
});