import type { Style } from "@react-pdf/types";
import type { ReactNode } from "react";
import type { TemplatePageProps } from "../../document";
import type { TemplateColorRoles, TemplateStyleContext, TemplateStyleSlots } from "../shared/types";
import { useMemo } from "react";
import { rgbaStringToHex } from "@reactive-resume/utils/color";
import { Image, Page, StyleSheet, View } from "#react-pdf-renderer";
import { useRender } from "../../context";
import { createBaseTemplateStyles } from "../shared/base-template-styles";
import {
	CustomFieldContactItem,
	EmailContactItem,
	LocationContactItem,
	PhoneContactItem,
	WebsiteContactItem,
} from "../shared/contact-item";
import { TemplateProvider } from "../shared/context";
import { shouldShowResumeHeader } from "../shared/cover-letter";
import { filterSections } from "../shared/filtering";
import { getTemplateMetrics } from "../shared/metrics";
import { getTemplatePageMinHeightStyle, getTemplatePageSize } from "../shared/page-size";
import { hasTemplatePicture } from "../shared/picture";
import { Heading, Text } from "../shared/primitives";
import { createRtlStyleHelpers } from "../shared/rtl";
import { Section } from "../shared/sections";
import { composeStyles, headerNameLineHeight } from "../shared/styles";

type RhyhornStyles = Omit<TemplateStyleSlots, "page"> & {
	page: Style;
	header: Style;
	headerTitle: Style;
	headerIdentity: Style;
	headerName: Style;
	contactList: Style;
	contactItem: Style;
	contactItemContent: Style;
	contactItemLast: Style;
	picture: Style;
	sectionGroup: Style;
};

type RhyhornTemplate = {
	colors: TemplateColorRoles;
	styles: RhyhornStyles;
};

type RhyhornHeaderProps = {
	styles: RhyhornStyles;
};

export const RhyhornPage = ({ page, pageIndex }: TemplatePageProps) => {
	const data = useRender();
	const { metadata } = data;
	const { colors, styles } = useRhyhornTemplate();
	const metrics = getTemplateMetrics(metadata.page);
	const pageSize = getTemplatePageSize(metadata.page.format);
	const pageMinHeightStyle = getTemplatePageMinHeightStyle(metadata.page.format);
	const showHeader = shouldShowResumeHeader(data, pageIndex);
	const mainSections = filterSections(page.main, data);
	const sidebarSections = filterSections(page.sidebar, data);

	return (
		<Page size={pageSize} style={composeStyles(styles.page, pageMinHeightStyle)}>
			<TemplateProvider styles={styles} colors={colors}>
				{showHeader && <Header styles={styles} />}

				<View style={composeStyles(styles.sectionGroup, { rowGap: metrics.sectionGap })}>
					{mainSections.map((section) => (
						<Section key={section} section={section} placement="main" />
					))}
				</View>

				{!page.fullWidth && (
					<View style={composeStyles(styles.sectionGroup, { rowGap: metrics.sectionGap })}>
						{sidebarSections.map((section) => (
							<Section key={section} section={section} placement="sidebar" />
						))}
					</View>
				)}
			</TemplateProvider>
		</Page>
	);
};

const Header = ({ styles }: RhyhornHeaderProps) => {
	const { basics, picture } = useRender();
	const hasPicture = hasTemplatePicture(picture);
	const contactItems: {
		id: string;
		content: ReactNode;
	}[] = [];

	if (basics.email) {
		contactItems.push({
			id: "email",
			content: <EmailContactItem email={basics.email} style={styles.contactItemContent} />,
		});
	}
	if (basics.phone) {
		contactItems.push({
			id: "phone",
			content: <PhoneContactItem phone={basics.phone} style={styles.contactItemContent} />,
		});
	}
	if (basics.location) {
		contactItems.push({
			id: "location",
			content: <LocationContactItem location={basics.location} style={styles.contactItemContent} />,
		});
	}

	if (basics.website.url) {
		contactItems.push({
			id: "website",
			content: <WebsiteContactItem website={basics.website} style={styles.contactItemContent} />,
		});
	}

	contactItems.push(
		...basics.customFields.map((field) => ({
			id: `custom-${field.id}`,
			content: <CustomFieldContactItem field={field} style={styles.contactItemContent} />,
		})),
	);

	return (
		<View style={styles.header}>
			<View style={styles.headerTitle}>
				<View style={styles.headerIdentity}>
					<Heading style={styles.headerName}>{basics.name}</Heading>
					<Text>{basics.headline}</Text>
				</View>

				<View style={styles.contactList}>
					{contactItems.map((item, index) => (
						<View
							key={item.id}
							style={composeStyles(
								styles.contactItem,
								index === contactItems.length - 1 ? styles.contactItemLast : undefined,
							)}
						>
							{item.content}
						</View>
					))}
				</View>
			</View>

			{hasPicture && <Image src={picture.url} style={styles.picture} />}
		</View>
	);
};

const useRhyhornTemplate = (): RhyhornTemplate => {
	const { picture, metadata, rtl } = useRender();

	return useMemo(() => {
		const r = createRtlStyleHelpers(rtl);
		const foreground = rgbaStringToHex(metadata.design.colors.text);
		const background = rgbaStringToHex(metadata.design.colors.background);
		const primary = rgbaStringToHex(metadata.design.colors.primary);
		const colors: TemplateColorRoles = { foreground, background, primary };
		const metrics = getTemplateMetrics(metadata.page);
		const contactGap = metrics.gapX(0.5);

		const base = createBaseTemplateStyles({ metadata, foreground, r, metrics, picture });

		const baseStyles = StyleSheet.create({
			...base,
			page: {
				color: foreground,
				backgroundColor: background,
				paddingHorizontal: metrics.page.paddingHorizontal,
				paddingVertical: metrics.page.paddingVertical,
				rowGap: metrics.sectionGap,
				fontFamily: metadata.typography.body.fontFamily,
				fontSize: metadata.typography.body.fontSize,
				lineHeight: metadata.typography.body.lineHeight,
				direction: r.pageDirection,
			},
			section: {
				flexDirection: "column",
				rowGap: metrics.gapY(0.25),
			},
			sectionHeading: {
				color: primary,
				borderBottomWidth: 1,
				borderBottomColor: primary,
				textAlign: r.sectionHeadingTextAlign,
			},
			item: {
				rowGap: metrics.gapY(0.125),
			},
			levelContainer: {
				width: "100%",
			},
			levelItem: {
				borderColor: primary,
			},
			levelItemActive: {
				backgroundColor: primary,
			},
			header: {
				flexDirection: r.row,
				alignItems: "center",
				columnGap: metrics.gapX(0.5),
			},
			headerTitle: {
				flex: 1,
				rowGap: metrics.gapY(0.5),
			},
			headerIdentity: {
				...r.headerIdentity,
				rowGap: metrics.gapY(0.35),
			},
			headerName: {
				fontSize: metadata.typography.heading.fontSize * 1.5,
				lineHeight: headerNameLineHeight,
			},
			contactList: {
				flexDirection: r.row,
				flexWrap: "wrap",
				rowGap: metrics.gapY(0.125),
			},
			contactItem: {
				flexDirection: r.row,
				alignItems: "center",
				...r.contactSeparator(primary, contactGap),
			},
			contactItemContent: {
				flexDirection: r.row,
				alignItems: "center",
				columnGap: metrics.gapX(1 / 6),
			},
			contactItemLast: r.contactSeparatorClear,
			sectionGroup: {},
		});

		const accentFor = ({ colors }: TemplateStyleContext) => colors.primary;

		return {
			colors,
			styles: {
				...baseStyles,
				sectionHeading: (context) => ({ ...baseStyles.sectionHeading, color: accentFor(context) }),
				levelItem: (context) => ({ borderColor: accentFor(context) }),
				levelItemActive: (context) => ({ backgroundColor: accentFor(context) }),
				icon: (context) => ({
					display: metadata.page.hideIcons ? "none" : "flex",
					size: metadata.typography.body.fontSize,
					color: accentFor(context),
				}),
			} satisfies RhyhornStyles,
		};
	}, [picture, metadata, rtl]);
};
