import { computed, signal } from "@preact/signals";

export const isPopperOpen = signal(false);
export const popperAnchorEl = signal(null);
export const popperContent = signal(null);

export const availableUnderlyings = signal([]);
export const underlying = signal(null);

export const daysToFrontExpiration = signal(14);

export const daysBetweenFrontAndBackExpiration = signal(14);

export const strikePercentageFromUnderlyingPrice = signal(1.4);
export const strikePercentageFromUnderlyingPriceRadius = signal(0.05);

export const exitToFrontExpiration = signal(2);

export const stockPriceChartData = signal([]);

export const similarCalendarPriceChartData = signal([]);

export const calendarExitPriceChartData = signal([]);

export const lookbackPeriodStart = signal("2022-01-01");
export const lookbackPeriodEnd = signal("2024-01-01");

export const maxChartPrice = computed(() =>
  Math.max(
    Math.max.apply(
      null,
      similarCalendarPriceChartData.value.map((d) => d.y)
    ),
    Math.max.apply(
      null,
      calendarExitPriceChartData.value.map((d) => d.y)
    )
  )
);

export const maxN = computed(() =>
  Math.max.apply(
    null,
    calendarExitPriceChartData.value.map((d) => d.n)
  )
);