import BaseStyle from 'primevue/base/style';

const css = `
@layer primevue {
    .p-megamenu {
        display: flex;
    }

    .p-megamenu-root-list {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .p-megamenu-root-list > .p-menuitem {
        position: relative;
    }

    .p-megamenu .p-menuitem-link {
        cursor: pointer;
        display: flex;
        align-items: center;
        text-decoration: none;
        overflow: hidden;
        position: relative;
    }

    .p-megamenu .p-menuitem-text {
        line-height: 1;
    }

    .p-megamenu-panel {
        display: none;
        position: absolute;
        width: auto;
        z-index: 1;
    }

    .p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
        display: block;
    }

    .p-megamenu-submenu {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    /* Horizontal */
    .p-megamenu-horizontal {
        align-items: center;
    }

    .p-megamenu-horizontal .p-megamenu-root-list {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
    }

    .p-megamenu-horizontal .p-megamenu-end {
        margin-left: auto;
        align-self: center;
    }

    /* Vertical */
    .p-megamenu-vertical {
        flex-direction: column;
    }

    .p-megamenu-vertical .p-megamenu-root-list {
        flex-direction: column;
    }

    .p-megamenu-vertical .p-megamenu-root-list > .p-menuitem-active > .p-megamenu-panel {
        left: 100%;
        top: 0;
    }

    .p-megamenu-vertical .p-megamenu-root-list > .p-menuitem > .p-menuitem-content > .p-menuitem-link > .p-submenu-icon {
        margin-left: auto;
    }

    .p-megamenu-grid {
        display: flex;
    }

    .p-megamenu-col-2,
    .p-megamenu-col-3,
    .p-megamenu-col-4,
    .p-megamenu-col-6,
    .p-megamenu-col-12 {
        flex: 0 0 auto;
        padding: 0.5rem;
    }

    .p-megamenu-col-2 {
        width: 16.6667%;
    }

    .p-megamenu-col-3 {
        width: 25%;
    }

    .p-megamenu-col-4 {
        width: 33.3333%;
    }

    .p-megamenu-col-6 {
        width: 50%;
    }

    .p-megamenu-col-12 {
        width: 100%;
    }
}
`;

const inlineStyles = {
    submenu: ({ instance, processedItem }) => ({ display: instance.isItemActive(processedItem) ? 'block' : 'none' })
};

const classes = {
    root: ({ instance }) => [
        'p-megamenu p-component',
        {
            'p-megamenu-horizontal': instance.horizontal,
            'p-megamenu-vertical': instance.vertical
        }
    ],
    start: 'p-megamenu-start',
    menu: 'p-megamenu-root-list',
    submenuHeader: ({ instance, processedItem }) => [
        'p-megamenu-submenu-header p-submenu-header',
        {
            'p-disabled': instance.isItemDisabled(processedItem)
        }
    ],
    menuitem: ({ instance, processedItem }) => [
        'p-menuitem',
        {
            'p-menuitem-active p-highlight': instance.isItemActive(processedItem),
            'p-focus': instance.isItemFocused(processedItem),
            'p-disabled': instance.isItemDisabled(processedItem)
        }
    ],
    content: 'p-menuitem-content',
    action: 'p-menuitem-link',
    icon: 'p-menuitem-icon',
    label: 'p-menuitem-text',
    submenuIcon: 'p-submenu-icon',
    panel: 'p-megamenu-panel',
    grid: 'p-megamenu-grid',
    column: ({ instance, processedItem }) => {
        let length = instance.isItemGroup(processedItem) ? processedItem.items.length : 0;
        let columnClass;

        switch (length) {
            case 2:
                columnClass = 'p-megamenu-col-6';
                break;

            case 3:
                columnClass = 'p-megamenu-col-4';
                break;

            case 4:
                columnClass = 'p-megamenu-col-3';
                break;

            case 6:
                columnClass = 'p-megamenu-col-2';
                break;

            default:
                columnClass = 'p-megamenu-col-12';
                break;
        }

        return columnClass;
    },
    submenu: 'p-submenu-list p-megamenu-submenu',
    submenuLabel: 'p-menuitem-text',
    separator: 'p-menuitem-separator',
    end: 'p-megamenu-end'
};

export default BaseStyle.extend({
    name: 'megamenu',
    css,
    classes,
    inlineStyles
});