import {
  RawValueSignature,
  SpecifyShadowsValue,
  TokenState,
} from '@specifyapp/specify-design-token-format';
import { rawShadowToCss, shadowValueToCss } from './shadow.js';
import { unwrapInnerValue } from '../../_utils/unwrapInnerValue.js';
import { DEFAULT_UNRESOLVABLE_STRATEGY } from '../aliasStrategies/throwOnUnresolvable.js';
import {
  CssResolvableAliasStrategy,
  CssUnresolvableAliasStrategy,
} from '../aliasStrategies/CssAliasStrategy.js';

/**
 * Converts a `TokenState<'shadows'>` to a css value.
 * E.g: `12px 12px 2px 1px rgba(0, 0, 255, .2), 12px 12px 2px 1px rgba(0, 0, 255, .2)`
 */
export function shadowsToCss<UnresolvableReturn = never>(
  aliasStrategy: CssResolvableAliasStrategy,
  unresolvableAliasStrategy: CssUnresolvableAliasStrategy<UnresolvableReturn> = DEFAULT_UNRESOLVABLE_STRATEGY,
) {
  return (tokenState: TokenState<'shadows'>) =>
    tokenState
      .getStatefulValueResult()
      .mapResolvableTopLevelAlias(aliasStrategy)
      .mapUnresolvableTopLevelAlias(alias => unresolvableAliasStrategy(tokenState, alias))
      .mapTopLevelValue(value =>
        value
          .mapRawValue(rawValue =>
            rawShadowsToCss(rawValue, aliasStrategy, unresolvableAliasStrategy),
          )
          .mapResolvableModeLevelAlias(aliasStrategy)
          .mapUnresolvableModeLevelAlias(alias => unresolvableAliasStrategy(tokenState, alias))
          .unwrap(),
      )
      .unwrap();
}

/**
 * Converts a `RawValueSignature<'shadows'>` to css.
 */
export function rawShadowsToCss<UnresolvableReturn = never>(
  shadows: RawValueSignature<'shadows'>,
  aliasStrategy: CssResolvableAliasStrategy,
  unresolvableAliasStrategy: CssUnresolvableAliasStrategy<UnresolvableReturn> = DEFAULT_UNRESOLVABLE_STRATEGY,
) {
  return shadows
    .map(shadow =>
      unwrapInnerValue(
        shadow.mapPrimitiveValue(s => rawShadowToCss(s, aliasStrategy)),
        aliasStrategy,
        unresolvableAliasStrategy,
      ),
    )
    .join(', ');
}

/**
 * Converts a shadows to css.
 */
export function shadowsValueToCss(shadows: SpecifyShadowsValue) {
  return shadows.map(shadowValueToCss).join(', ');
}