import {

ColorDiff,

ColorFile,

getSyntaxTheme as nativeGetSyntaxTheme,

type SyntaxTheme,

} from 'color-diff-napi'

import { isEnvDefinedFalsy } from '../../utils/envUtils.js'

export type ColorModuleUnavailableReason = 'env'

/**

* Returns a static reason why the color-diff module is unavailable, or null if available.

* 'env' = disabled via CLAUDE_CODE_SYNTAX_HIGHLIGHT

*

* The TS port of color-diff works in all build modes, so the only way to

* disable it is via the env var.

*/

export function getColorModuleUnavailableReason(): ColorModuleUnavailableReason | null {

if (isEnvDefinedFalsy(process.env.CLAUDE_CODE_SYNTAX_HIGHLIGHT)) {

return 'env'

}

return null

}

export function expectColorDiff(): typeof ColorDiff | null {

return getColorModuleUnavailableReason() === null ? ColorDiff : null

}

export function expectColorFile(): typeof ColorFile | null {

return getColorModuleUnavailableReason() === null ? ColorFile : null

}

export function getSyntaxTheme(themeName: string): SyntaxTheme | null {

return getColorModuleUnavailableReason() === null

? nativeGetSyntaxTheme(themeName)

: null

}