// ── UI: Select Primitive ──
// Accessible dropdown select component built on Radix UI Select.

import * as React from "react"
import * as SelectPrimitive from "@radix-ui/react-select"
import { cn } from "@/lib/utils"
import { ChevronDown, ChevronUp, Check } from "lucide-react"

const Select = SelectPrimitive.Root
const SelectGroup = SelectPrimitive.Group
const SelectValue = SelectPrimitive.Value

/**
 * SelectTrigger — the visible button that opens the select dropdown.
 * Displays a chevron icon on the right.
 */
const SelectTrigger = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.Trigger>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
>(({ className, children, ...props }, ref) => (
  <SelectPrimitive.Trigger
    ref={ref}
    className={cn(
      "flex h-9 w-full items-center justify-between whitespace-nowrap rounded-md border border-input bg-transparent px-3 py-2 text-sm shadow-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-1 focus:ring-ring disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
      className
    )}
    {...props}
  >
    {children}
    <SelectPrimitive.Icon asChild>
      <ChevronDown className="h-4 w-4 opacity-50" />
    </SelectPrimitive.Icon>
  </SelectPrimitive.Trigger>
))
SelectTrigger.displayName = SelectPrimitive.Trigger.displayName

const SelectScrollUpButton = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
>(({ className, ...props }, ref) => (
  <SelectPrimitive.ScrollUpButton
    ref={ref}
    className={cn("flex cursor-default items-center justify-center py-1", className)}
    {...props}
  >
    <ChevronUp className="h-4 w-4" />
  </SelectPrimitive.ScrollUpButton>
))
SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName

const SelectScrollDownButton = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
>(({ className, ...props }, ref) => (
  <SelectPrimitive.ScrollDownButton
    ref={ref}
    className={cn("flex cursor-default items-center justify-center py-1", className)}
    {...props}
  >
    <ChevronDown className="h-4 w-4" />
  </SelectPrimitive.ScrollDownButton>
))
SelectScrollDownButton.displayName = SelectPrimitive.ScrollDownButton.displayName

/**
 * SelectContent — the dropdown popover containing select items.
 * Positioned via popper by default with scroll-up/down buttons.
 */
const SelectContent = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.Content>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
>(({ className, children, position = "popper", ...props }, ref) => (
  <SelectPrimitive.Portal>
    <SelectPrimitive.Content
      ref={ref}
      className={cn(
        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md animate-in fade-in-80",
        position === "popper" && "translate-y-1",
        className
      )}
      position={position}
      {...props}
    >
      <SelectScrollUpButton />
      <SelectPrimitive.Viewport
        className={cn(
          "p-1",
          position === "popper" && "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)]"
        )}
      >
        {children}
      </SelectPrimitive.Viewport>
      <SelectScrollDownButton />
    </SelectPrimitive.Content>
  </SelectPrimitive.Portal>
))
SelectContent.displayName = SelectPrimitive.Content.displayName

const SelectItem = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.Item>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
>(({ className, children, ...props }, ref) => (
  <SelectPrimitive.Item
    ref={ref}
    className={cn(
      "relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-2 pr-8 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
      className
    )}
    {...props}
  >
    <span className="absolute right-2 flex h-3.5 w-3.5 items-center justify-center">
      <SelectPrimitive.ItemIndicator>
        <Check className="h-4 w-4" />
      </SelectPrimitive.ItemIndicator>
    </span>
    <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
  </SelectPrimitive.Item>
))
SelectItem.displayName = SelectPrimitive.Item.displayName

const SelectSeparator = React.forwardRef<
  React.ElementRef<typeof SelectPrimitive.Separator>,
  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
>(({ className, ...props }, ref) => (
  <SelectPrimitive.Separator
    ref={ref}
    className={cn("-mx-1 my-1 h-px bg-muted", className)}
    {...props}
  />
))
SelectSeparator.displayName = SelectPrimitive.Separator.displayName

export {
  Select,
  SelectGroup,
  SelectValue,
  SelectTrigger,
  SelectContent,
  SelectItem,
  SelectSeparator,
}
