import React from "react"
import { ChevronLeft, ChevronRight } from "lucide-react"
import { DayPicker } from "react-day-picker"

import { cn } from "@/lib/utils"
import { buttonVariants } from "@/components/ui/button"

export type CalendarProps = React.ComponentProps<typeof DayPicker>

function Calendar({
  className,
  classNames,
  showOutsideDays = true,
  ...props
}: CalendarProps) {
  // Week-ends stylés mais TOUJOURS SÉLECTIONNABLES pour les tâches
  const isWeekend = (date: Date) => {
    const day = date.getDay();
    return day === 0 || day === 6; // Dimanche ou Samedi
  };

  return (
    <DayPicker
      showOutsideDays={showOutsideDays}
      className={cn("p-3", className)}
      modifiers={{
        weekend: isWeekend,
        ...props.modifiers,
      }}
      modifiersClassNames={{
        weekend: "weekend-day",
        ...props.modifiersClassNames,
      }}
      modifiersStyles={{
        weekend: { backgroundColor: '#f0f9ff', border: '1px solid #bfdbfe' }, // Bleu clair pour week-ends
        ...props.modifiersStyles,
      }}
      classNames={{
        months: "flex flex-col sm:flex-row space-y-4 sm:space-x-4 sm:space-y-0",
        month: "space-y-4",
        caption: "flex justify-center pt-1 relative items-center",
        caption_label: "text-sm font-medium",
        nav: "space-x-1 flex items-center",
        nav_button: cn(
          buttonVariants({ variant: "outline" }),
          "h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100"
        ),
        nav_button_previous: "absolute left-1",
        nav_button_next: "absolute right-1",
        table: "w-full border-collapse space-y-1",
        head_row: "flex",
        head_cell:
          "text-muted-foreground rounded-md w-9 font-normal text-[0.8rem]",
        row: "flex w-full mt-2",
        cell: "h-9 w-9 text-center text-sm p-0 relative [&:has([aria-selected].day-range-end)]:rounded-r-md [&:has([aria-selected].day-outside)]:bg-accent/50 [&:has([aria-selected])]:bg-accent first:[&:has([aria-selected])]:rounded-l-md last:[&:has([aria-selected])]:rounded-r-md focus-within:relative focus-within:z-20 focus-within:outline-none",
        day: cn(
          buttonVariants({ variant: "ghost" }),
          "h-9 w-9 p-0 font-normal aria-selected:opacity-100 focus:outline-none focus:ring-0 focus:ring-offset-0"
        ),
        day_range_end: "day-range-end",
        day_selected:
          "bg-blue-600 text-white hover:bg-blue-700 hover:text-white focus:bg-blue-600 focus:text-white",
        day_today: "bg-blue-50 text-blue-900 font-semibold border border-blue-200 hover:bg-blue-100",
        day_outside:
          "day-outside text-muted-foreground aria-selected:bg-accent/50 aria-selected:text-muted-foreground",
        day_disabled: "text-muted-foreground opacity-50",
        day_range_middle:
          "aria-selected:bg-accent aria-selected:text-accent-foreground",
        day_hidden: "invisible",
        ...classNames,
      }}
      components={{
        IconLeft: ({ className, ...props }) => (
          <ChevronLeft className={cn("h-4 w-4", className)} {...props} />
        ),
        IconRight: ({ className, ...props }) => (
          <ChevronRight className={cn("h-4 w-4", className)} {...props} />
        ),
      }}
      {...props}
    />
  )
}
Calendar.displayName = "Calendar"

export { Calendar }