import { type } from "@tauri-apps/plugin-os";
import classNames from "classnames";
import type { CSSProperties, ReactNode } from "react";
import { useState } from "react";
import type { ButtonProps } from "./Button";
import { Button } from "./Button";
import { Label } from "./Label";
import type { RadioDropdownItem } from "./RadioDropdown";
import { RadioDropdown } from "./RadioDropdown";
import { HStack } from "./Stacks";

export interface SelectProps<T extends string> {
  name: string;
  label: string;
  labelPosition?: "top" | "left";
  labelClassName?: string;
  hideLabel?: boolean;
  value: T;
  help?: ReactNode;
  leftSlot?: ReactNode;
  options: RadioDropdownItem<T>[];
  onChange: (value: T) => void;
  defaultValue?: T;
  size?: ButtonProps["size"];
  className?: string;
  disabled?: boolean;
  filterable?: boolean;
}

export function Select<T extends string>({
  labelPosition = "top",
  name,
  help,
  labelClassName,
  disabled,
  hideLabel,
  label,
  value,
  options,
  leftSlot,
  onChange,
  className,
  defaultValue,
  filterable,
  size = "md",
}: SelectProps<T>) {
  const [focused, setFocused] = useState<boolean>(false);
  const id = `input-${name}`;
  const isInvalidSelection = options.find((o) => "value" in o && o.value === value) == null;

  const handleChange = (value: T) => {
    onChange?.(value);
  };

  return (
    <div
      className={classNames(
        className,
        "x-theme-input",
        "w-full",
        "pointer-events-auto", // Just in case we're placing in disabled parent
        labelPosition === "left" && "grid grid-cols-[auto_1fr] items-center gap-2",
        labelPosition === "top" && "flex-row gap-0.5",
      )}
    >
      <Label htmlFor={id} visuallyHidden={hideLabel} className={labelClassName} help={help}>
        {label}
      </Label>
      {type() === "macos" && !filterable ? (
        <HStack
          space={2}
          className={classNames(
            "w-full rounded-md text text-sm font-mono",
            "pl-2",
            "border",
            focused && !disabled ? "border-border-focus" : "border-border",
            disabled && "border-dotted",
            isInvalidSelection && "border-danger",
            size === "xs" && "h-xs",
            size === "sm" && "h-sm",
            size === "md" && "h-md",
          )}
        >
          {leftSlot && <div>{leftSlot}</div>}
          <select
            value={value}
            style={selectBackgroundStyles}
            onChange={(e) => handleChange(e.target.value as T)}
            onFocus={() => setFocused(true)}
            onBlur={() => setFocused(false)}
            disabled={disabled}
            className={classNames(
              "pr-7 w-full outline-none bg-transparent disabled:opacity-disabled",
              "leading-[1] rounded-none", // Center the text better vertically
            )}
          >
            {isInvalidSelection && <option value={"__NONE__"}>-- Select an Option --</option>}
            {options.map((o) => {
              if (o.type === "separator") return null;
              return (
                <option key={o.value} value={o.value}>
                  {o.label}
                  {o.value === defaultValue && " (default)"}
                </option>
              );
            })}
          </select>
        </HStack>
      ) : (
        // Use custom "select" component until Tauri can be configured to have select menus not always appear in
        // light mode
        <RadioDropdown value={value} onChange={handleChange} items={options}>
          <Button
            className="w-full text-sm font-mono"
            justify="start"
            variant="border"
            size={size}
            leftSlot={leftSlot}
            disabled={disabled}
            forDropdown
          >
            {options.find((o) => o.type !== "separator" && o.value === value)?.label ?? "--"}
          </Button>
        </RadioDropdown>
      )}
    </div>
  );
}

const selectBackgroundStyles: CSSProperties = {
  backgroundImage: `url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e")`,
  backgroundPosition: "right 0.3rem center",
  backgroundRepeat: "no-repeat",
  backgroundSize: "1.5em 1.5em",
  appearance: "none",
  printColorAdjust: "exact",
};