import {ErrorWithContext} from '../../error/ErrorWithContext'
import {Filesystem} from './Filesystem'
import {Awaitable} from '../types'
import {Writable} from 'stream'

/**
 * Error thrown when attempting to perform an operation on a filesystem that doesn't support it.
 */
export class FilesystemOperationNotSupported extends ErrorWithContext {
    constructor(fs: Filesystem, operation: string, context: any = {}) {
        super(`The filesystem ${fs.constructor.name} does not support the ${operation} operation.`, context)
    }
}

/**
 * Abstract base class for filesystems that are read-only (e.g. HTTP/S).
 */
export abstract class ReadOnlyFilesystem extends Filesystem {
    putLocalFile(): Awaitable<void> {
        throw new FilesystemOperationNotSupported(this, 'putLocalFile')
    }

    putStoreFileAsStream(): Awaitable<Writable> {
        throw new FilesystemOperationNotSupported(this, 'putStoreFileAsStream')
    }

    touch(): Awaitable<void> {
        throw new FilesystemOperationNotSupported(this, 'touch')
    }

    remove(): Awaitable<void> {
        throw new FilesystemOperationNotSupported(this, 'remove')
    }

    mkdir(): Awaitable<void> {
        throw new FilesystemOperationNotSupported(this, 'mkdir')
    }

    setMetadata(): Awaitable<void> {
        throw new FilesystemOperationNotSupported(this, 'setMetadata')
    }
}