const BACKGROUND_COLOR = 'rgba(51, 51, 51, .5)';

/**
 * Creates the styles for the component.
 *
 * @param {Object} theme - The current theme.
 * @returns {Object}
 */
export const styles = theme => {
    return {
        toggleFilmstripContainer: {
            display: 'flex',
            flexWrap: 'nowrap',
            alignItems: 'center',
            justifyContent: 'center',
            backgroundColor: BACKGROUND_COLOR,
            width: '32px',
            height: '24px',
            position: 'absolute',
            borderRadius: '4px',
            top: 'calc(-24px - 3px)',
            left: 'calc(50% - 16px)',
            opacity: 0,
            transition: 'opacity .3s',
            zIndex: 1,

            '&:hover': {
                backgroundColor: theme.palette.ui02
            }
        },

        toggleFilmstripButton: {
            fontSize: '14px',
            lineHeight: 1.2,
            textAlign: 'center',
            background: 'transparent',
            height: 'auto',
            width: '100%',
            padding: 0,
            margin: 0,
            border: 'none',

            '-webkit-appearance': 'none',

            '& svg': {
                fill: theme.palette.icon01
            }
        },

        toggleVerticalFilmstripContainer: {
            transform: 'rotate(-90deg)',
            left: 'calc(-24px - 3px - 4px)',
            top: 'calc(50% - 12px)'
        },

        toggleTopPanelContainer: {
            transform: 'rotate(180deg)',
            bottom: 'calc(-24px - 6px)',
            top: 'auto'
        },

        toggleTopPanelContainerHidden: {
            visibility: 'hidden'
        },

        filmstrip: {
            transition: 'background .2s ease-in-out, right 1s, bottom 1s, top 1s, height .3s ease-in',
            right: 0,
            bottom: 0,

            '&:hover': {
                '& .resizable-filmstrip': {
                    backgroundColor: BACKGROUND_COLOR
                },

                '& .filmstrip-hover': {
                    backgroundColor: BACKGROUND_COLOR
                },

                '& .toggleFilmstripContainer': {
                    opacity: 1
                },

                '& .dragHandleContainer': {
                    visibility: 'visible'
                }
            },

            '.horizontal-filmstrip &.hidden': {
                bottom: '-50px',

                '&:hover': {
                    backgroundColor: 'transparent'
                }
            },

            '&.hidden': {
                '& .toggleFilmstripContainer': {
                    opacity: 1
                }
            }
        },

        filmstripBackground: {
            backgroundColor: theme.palette.uiBackground,

            '&:hover': {
                backgroundColor: theme.palette.uiBackground
            }
        },

        resizableFilmstripContainer: {
            display: 'flex',
            position: 'relative',
            flexDirection: 'row',
            alignItems: 'center',
            height: '100%',
            width: '100%',
            transition: 'background .2s ease-in-out',

            '& .avatar-container': {
                maxWidth: 'initial',
                maxHeight: 'initial'
            },

            '&.top-panel-filmstrip': {
                flexDirection: 'column'
            }
        },

        dragHandleContainer: {
            height: '100%',
            width: '9px',
            backgroundColor: 'transparent',
            position: 'relative',
            cursor: 'col-resize',
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
            visibility: 'hidden',

            '&:hover': {
                '& .dragHandle': {
                    backgroundColor: theme.palette.icon01
                }
            },

            '&.visible': {
                visibility: 'visible',

                '& .dragHandle': {
                    backgroundColor: theme.palette.icon01
                }
            },

            '&.top-panel': {
                order: 2,
                width: '100%',
                height: '9px',
                cursor: 'row-resize',

                '& .dragHandle': {
                    height: '3px',
                    width: '100px'
                }
            }
        },

        dragHandle: {
            backgroundColor: theme.palette.icon02,
            height: '100px',
            width: '3px',
            borderRadius: '1px'
        }
    };
};