import { Box, createStyles, Divider, Paper } from "@mantine/core"
import { MantineNumberSize } from "@mantine/styles"
import { Constants } from "app/constants"
import { Entry, ViewMode } from "app/types"
import { useViewMode } from "hooks/useViewMode"
import React from "react"
import { useSwipeable } from "react-swipeable"
import { FeedEntryBody } from "./FeedEntryBody"
import { FeedEntryCompactHeader } from "./FeedEntryCompactHeader"
import { FeedEntryContextMenu } from "./FeedEntryContextMenu"
import { FeedEntryFooter } from "./FeedEntryFooter"
import { FeedEntryHeader } from "./FeedEntryHeader"

interface FeedEntryProps {
    entry: Entry
    expanded: boolean
    selected: boolean
    showSelectionIndicator: boolean
    maxWidth?: number
    onHeaderClick: (e: React.MouseEvent) => void
    onHeaderRightClick: (e: React.MouseEvent) => void
    onBodyClick: (e: React.MouseEvent) => void
    onSwipedRight: () => void
}

const useStyles = createStyles((theme, props: FeedEntryProps & { viewMode?: ViewMode }) => {
    let backgroundColor
    if (theme.colorScheme === "dark") {
        backgroundColor = props.entry.read ? "inherit" : theme.colors.dark[5]
    } else {
        backgroundColor = props.entry.read && !props.expanded ? theme.colors.gray[0] : "inherit"
    }

    let marginY = 10
    if (props.viewMode === "title") {
        marginY = 2
    } else if (props.viewMode === "cozy") {
        marginY = 6
    }

    let mobileMarginY = 6
    if (props.viewMode === "title") {
        mobileMarginY = 2
    } else if (props.viewMode === "cozy") {
        mobileMarginY = 4
    }

    let backgroundHoverColor = backgroundColor
    if (!props.expanded && !props.entry.read) {
        backgroundHoverColor = theme.colorScheme === "dark" ? theme.colors.dark[6] : theme.colors.gray[1]
    }

    let paperBorderLeftColor
    if (props.showSelectionIndicator) {
        const borderLeftColor = theme.colorScheme === "dark" ? theme.colors.orange[4] : theme.colors.orange[6]
        paperBorderLeftColor = `${borderLeftColor} !important`
    }

    return {
        paper: {
            backgroundColor,
            borderLeftColor: paperBorderLeftColor,
            marginTop: marginY,
            marginBottom: marginY,
            [theme.fn.smallerThan(Constants.layout.mobileBreakpoint)]: {
                marginTop: mobileMarginY,
                marginBottom: mobileMarginY,
            },
            "@media (hover: hover)": {
                "&:hover": {
                    backgroundColor: backgroundHoverColor,
                },
            },
        },
        headerLink: {
            color: "inherit",
            textDecoration: "none",
        },
        body: {
            direction: props.entry.rtl ? "rtl" : "ltr",
            maxWidth: props.maxWidth ?? "100%",
        },
    }
})

export function FeedEntry(props: FeedEntryProps) {
    const { viewMode } = useViewMode()
    const { classes, cx } = useStyles({ ...props, viewMode })

    const swipeHandlers = useSwipeable({
        onSwipedRight: props.onSwipedRight,
    })

    let paddingX: MantineNumberSize = "xs"
    if (viewMode === "title" || viewMode === "cozy") paddingX = 6

    let paddingY: MantineNumberSize = "xs"
    if (viewMode === "title") {
        paddingY = 4
    } else if (viewMode === "cozy") {
        paddingY = 8
    }

    let borderRadius: MantineNumberSize = "sm"
    if (viewMode === "title") {
        borderRadius = 0
    } else if (viewMode === "cozy") {
        borderRadius = "xs"
    }

    const compactHeader = !props.expanded && (viewMode === "title" || viewMode === "cozy")
    return (
        <Paper
            withBorder
            radius={borderRadius}
            className={cx(classes.paper, {
                read: props.entry.read,
                unread: !props.entry.read,
                expanded: props.expanded,
                selected: props.selected,
                "show-selection-indicator": props.showSelectionIndicator,
            })}
        >
            <a
                className={classes.headerLink}
                href={props.entry.url}
                target="_blank"
                rel="noreferrer"
                onClick={props.onHeaderClick}
                onAuxClick={props.onHeaderClick}
                onContextMenu={props.onHeaderRightClick}
            >
                <Box px={paddingX} py={paddingY} {...swipeHandlers}>
                    {compactHeader && <FeedEntryCompactHeader entry={props.entry} />}
                    {!compactHeader && <FeedEntryHeader entry={props.entry} expanded={props.expanded} />}
                </Box>
            </a>
            {props.expanded && (
                <Box px={paddingX} pb={paddingY} onClick={props.onBodyClick}>
                    <Box className={classes.body}>
                        <FeedEntryBody entry={props.entry} />
                    </Box>
                    <Divider variant="dashed" my={paddingY} />
                    <FeedEntryFooter entry={props.entry} />
                </Box>
            )}

            <FeedEntryContextMenu entry={props.entry} />
        </Paper>
    )
}