import { DateRangeToUnits, DateUnit } from "../types/analytics";
import { __ } from "@wordpress/i18n";

export const getDaysDiff = (date1: Date, date2: Date) => {
	const diffTime = Math.abs(date2.getTime() - date1.getTime());
	return Math.ceil(diffTime / (1000 * 60 * 60 * 24));
};

export const getUnitsForDayRange = (days: number): Array<DateUnit> => {
	if (days <= 1) return ["hour"];
	if (days <= 7) return ["day", "hour"];
	if (days <= 14) return ["day", "week"];
	if (days <= 30) return ["day", "week"];
	if (days <= 90) return ["week", "month"];
	if (days <= 365) return ["month"];
	return ["year"];
};

const getAllTimeUnits = (): Array<DateUnit> => {
	const installDate = new Date(window.__UR_ANALYTICS__.install_date);
	const currentDate = new Date();
	const daysDiff = getDaysDiff(installDate, currentDate);
	return getUnitsForDayRange(daysDiff);
};

export const DATE_RANGE_TO_UNITS: DateRangeToUnits = {
	today: ["hour"],
	last7: ["day", "hour"],
	last14: ["day", "week"],
	last30: ["day", "week"],
	last3Months: ["week", "month"],
	last12Months: ["month"],
	monthToDate: ["day", "week"],
	quarterToDate: ["day", "week", "month"],
	yearToDate: ["month", "week"],
	get allTime() {
		return getAllTimeUnits();
	}
};

export const DATE_UNITS: Array<{
	label: string;
	value: DateUnit;
}> = [
	{
		label: __("Hour"),
		value: "hour"
	},
	{
		label: __("Day"),
		value: "day"
	},
	{
		label: __("Week"),
		value: "week"
	},
	{
		label: __("Month"),
		value: "month"
	},
	{
		label: __("Year"),
		value: "year"
	}
];

// Optimized color palette for better visual distinction and accessibility
export const CHART_COLORS = [
	"#3B82F6", // Vibrant Blue
	"#10B981", // Emerald Green
	"#F59E0B", // Amber
	"#EF4444", // Red
	"#8B5CF6", // Purple
	"#06B6D4", // Cyan
	"#EC4899", // Pink
	"#14B8A6", // Teal
	"#F97316", // Orange
	"#6366F1", // Indigo
	"#84CC16", // Lime
	"#A855F7", // Violet
	"#22D3EE", // Sky
	"#F43F5E", // Rose
	"#0EA5E9", // Sky Blue
	"#34D399", // Green
	"#FB923C", // Orange
	"#A78BFA", // Purple
	"#60A5FA", // Blue
	"#FBBF24" // Yellow
];