import { Helmet } from "react-helmet";
import { createGlobalStyle } from "styled-components";

import { createContext } from "preact";
import { useEffect } from "preact/hooks";

import { isTouchscreenDevice } from "../lib/isTouchscreenDevice";

import { connectState } from "../redux/connector";

import { Children } from "../types/Preact";

export type Variables =
	| "accent"
	| "background"
	| "foreground"
	| "block"
	| "message-box"
	| "mention"
	| "success"
	| "warning"
	| "error"
	| "hover"
	| "scrollbar-thumb"
	| "scrollbar-track"
	| "primary-background"
	| "primary-header"
	| "secondary-background"
	| "secondary-foreground"
	| "secondary-header"
	| "tertiary-background"
	| "tertiary-foreground"
	| "status-online"
	| "status-away"
	| "status-busy"
	| "status-streaming"
	| "status-invisible";

// While this isn't used, it'd be good to keep this up to date as a reference or for future use
export type HiddenVariables =
	| "font"
	| "ligatures"
	| "app-height"
	| "sidebar-active"
	| "monospace-font";

export type Fonts =
	| "Open Sans"
	| "Inter"
	| "Atkinson Hyperlegible"
	| "Roboto"
	| "Noto Sans"
	| "Lato"
	| "Bree Serif"
	| "Montserrat"
	| "Poppins"
	| "Raleway"
	| "Ubuntu"
	| "Comic Neue";
export type MonoscapeFonts =
	| "Fira Code"
	| "Roboto Mono"
	| "Source Code Pro"
	| "Space Mono"
	| "Ubuntu Mono";

export type Theme = {
	[variable in Variables]: string;
} & {
	light?: boolean;
	font?: Fonts;
	css?: string;
	monoscapeFont?: MonoscapeFonts;
};

export interface ThemeOptions {
	preset?: string;
	ligatures?: boolean;
	custom?: Partial<Theme>;
}

// import aaa from "@fontsource/open-sans/300.css?raw";
// console.info(aaa);

export const FONTS: Record<Fonts, { name: string; load: () => void }> = {
	"Open Sans": {
		name: "Open Sans",
		load: async () => {
			await import("@fontsource/open-sans/300.css");
			await import("@fontsource/open-sans/400.css");
			await import("@fontsource/open-sans/600.css");
			await import("@fontsource/open-sans/700.css");
			await import("@fontsource/open-sans/400-italic.css");
		},
	},
	Inter: {
		name: "Inter",
		load: async () => {
			await import("@fontsource/inter/300.css");
			await import("@fontsource/inter/400.css");
			await import("@fontsource/inter/600.css");
			await import("@fontsource/inter/700.css");
		},
	},
	"Atkinson Hyperlegible": {
		name: "Atkinson Hyperlegible",
		load: async () => {
			await import("@fontsource/atkinson-hyperlegible/400.css");
			await import("@fontsource/atkinson-hyperlegible/700.css");
			await import("@fontsource/atkinson-hyperlegible/400-italic.css");
		},
	},
	Roboto: {
		name: "Roboto",
		load: async () => {
			await import("@fontsource/roboto/400.css");
			await import("@fontsource/roboto/700.css");
			await import("@fontsource/roboto/400-italic.css");
		},
	},
	"Noto Sans": {
		name: "Noto Sans",
		load: async () => {
			await import("@fontsource/noto-sans/400.css");
			await import("@fontsource/noto-sans/700.css");
			await import("@fontsource/noto-sans/400-italic.css");
		},
	},
	"Bree Serif": {
		name: "Bree Serif",
		load: () => import("@fontsource/bree-serif/400.css"),
	},
	Lato: {
		name: "Lato",
		load: async () => {
			await import("@fontsource/lato/300.css");
			await import("@fontsource/lato/400.css");
			await import("@fontsource/lato/700.css");
			await import("@fontsource/lato/400-italic.css");
		},
	},
	Montserrat: {
		name: "Montserrat",
		load: async () => {
			await import("@fontsource/montserrat/300.css");
			await import("@fontsource/montserrat/400.css");
			await import("@fontsource/montserrat/600.css");
			await import("@fontsource/montserrat/700.css");
			await import("@fontsource/montserrat/400-italic.css");
		},
	},
	Poppins: {
		name: "Poppins",
		load: async () => {
			await import("@fontsource/poppins/300.css");
			await import("@fontsource/poppins/400.css");
			await import("@fontsource/poppins/600.css");
			await import("@fontsource/poppins/700.css");
			await import("@fontsource/poppins/400-italic.css");
		},
	},
	Raleway: {
		name: "Raleway",
		load: async () => {
			await import("@fontsource/raleway/300.css");
			await import("@fontsource/raleway/400.css");
			await import("@fontsource/raleway/600.css");
			await import("@fontsource/raleway/700.css");
			await import("@fontsource/raleway/400-italic.css");
		},
	},
	Ubuntu: {
		name: "Ubuntu",
		load: async () => {
			await import("@fontsource/ubuntu/300.css");
			await import("@fontsource/ubuntu/400.css");
			await import("@fontsource/ubuntu/500.css");
			await import("@fontsource/ubuntu/700.css");
			await import("@fontsource/ubuntu/400-italic.css");
		},
	},
	"Comic Neue": {
		name: "Comic Neue",
		load: async () => {
			await import("@fontsource/comic-neue/300.css");
			await import("@fontsource/comic-neue/400.css");
			await import("@fontsource/comic-neue/700.css");
			await import("@fontsource/comic-neue/400-italic.css");
		},
	},
};

export const MONOSCAPE_FONTS: Record<
	MonoscapeFonts,
	{ name: string; load: () => void }
> = {
	"Fira Code": {
		name: "Fira Code",
		load: () => import("@fontsource/fira-code/400.css"),
	},
	"Roboto Mono": {
		name: "Roboto Mono",
		load: () => import("@fontsource/roboto-mono/400.css"),
	},
	"Source Code Pro": {
		name: "Source Code Pro",
		load: () => import("@fontsource/source-code-pro/400.css"),
	},
	"Space Mono": {
		name: "Space Mono",
		load: () => import("@fontsource/space-mono/400.css"),
	},
	"Ubuntu Mono": {
		name: "Ubuntu Mono",
		load: () => import("@fontsource/ubuntu-mono/400.css"),
	},
};

export const FONT_KEYS = Object.keys(FONTS).sort();
export const MONOSCAPE_FONT_KEYS = Object.keys(MONOSCAPE_FONTS).sort();

export const DEFAULT_FONT = "Open Sans";
export const DEFAULT_MONO_FONT = "Fira Code";

// Generated from https://gitlab.insrt.uk/revolt/community/themes
export const PRESETS: Record<string, Theme> = {
	light: {
		light: true,
		accent: "#FD6671",
		background: "#F6F6F6",
		foreground: "#101010",
		block: "#414141",
		"message-box": "#F1F1F1",
		mention: "rgba(251, 255, 0, 0.40)",
		success: "#65E572",
		warning: "#FAA352",
		error: "#F06464",
		hover: "rgba(0, 0, 0, 0.2)",
		"scrollbar-thumb": "#CA525A",
		"scrollbar-track": "transparent",
		"primary-background": "#FFFFFF",
		"primary-header": "#F1F1F1",
		"secondary-background": "#F1F1F1",
		"secondary-foreground": "#888888",
		"secondary-header": "#F1F1F1",
		"tertiary-background": "#4D4D4D",
		"tertiary-foreground": "#646464",
		"status-online": "#3ABF7E",
		"status-away": "#F39F00",
		"status-busy": "#F84848",
		"status-streaming": "#977EFF",
		"status-invisible": "#A5A5A5",
	},
	dark: {
		light: false,
		accent: "#FD6671",
		background: "#191919",
		foreground: "#F6F6F6",
		block: "#2D2D2D",
		"message-box": "#363636",
		mention: "rgba(251, 255, 0, 0.06)",
		success: "#65E572",
		warning: "#FAA352",
		error: "#F06464",
		hover: "rgba(0, 0, 0, 0.1)",
		"scrollbar-thumb": "#CA525A",
		"scrollbar-track": "transparent",
		"primary-background": "#242424",
		"primary-header": "#363636",
		"secondary-background": "#1E1E1E",
		"secondary-foreground": "#C8C8C8",
		"secondary-header": "#2D2D2D",
		"tertiary-background": "#4D4D4D",
		"tertiary-foreground": "#848484",
		"status-online": "#3ABF7E",
		"status-away": "#F39F00",
		"status-busy": "#F84848",
		"status-streaming": "#977EFF",
		"status-invisible": "#A5A5A5",
	},
};

const keys = Object.keys(PRESETS.dark);
const GlobalTheme = createGlobalStyle<{ theme: Theme }>`
:root {
	${(props) =>
		(Object.keys(props.theme) as Variables[]).map((key) => {
			if (!keys.includes(key)) return;
			return `--${key}: ${props.theme[key]};`;
		})}
}
`;

// Load the default default them and apply extras later
export const ThemeContext = createContext<Theme>(PRESETS["dark"]);

interface Props {
	children: Children;
	options?: ThemeOptions;
}

function Theme({ children, options }: Props) {
	const theme: Theme = {
		...PRESETS["dark"],
		...PRESETS[options?.preset ?? ""],
		...options?.custom,
	};

	const root = document.documentElement.style;
	useEffect(() => {
		const font = theme.font ?? DEFAULT_FONT;
		root.setProperty("--font", `"${font}"`);
		FONTS[font].load();
	}, [theme.font]);

	useEffect(() => {
		const font = theme.monoscapeFont ?? DEFAULT_MONO_FONT;
		root.setProperty("--monoscape-font", `"${font}"`);
		MONOSCAPE_FONTS[font].load();
	}, [theme.monoscapeFont]);

	useEffect(() => {
		root.setProperty("--ligatures", options?.ligatures ? "normal" : "none");
	}, [options?.ligatures]);

	useEffect(() => {
		const resize = () =>
			root.setProperty("--app-height", `${window.innerHeight}px`);
		resize();

		window.addEventListener("resize", resize);
		return () => window.removeEventListener("resize", resize);
	}, []);

	return (
		<ThemeContext.Provider value={theme}>
			<Helmet>
				<meta
					name="theme-color"
					content={
						isTouchscreenDevice
							? theme["primary-header"]
							: theme["background"]
					}
				/>
			</Helmet>
			<GlobalTheme theme={theme} />
			{theme.css && (
				<style dangerouslySetInnerHTML={{ __html: theme.css }} />
			)}
			{children}
		</ThemeContext.Provider>
	);
}

export default connectState<{ children: Children }>(Theme, (state) => {
	return {
		options: state.settings.theme,
	};
});