import type { AlignmentRecord } from './types'
import type { Feature } from '@jbrowse/core/util'

/**
 * Lightweight Feature implementation for MAF alignments.
 * Avoids SimpleFeature overhead (validation, data Record, spreads).
 */
export default class MafFeature implements Feature {
  private _id: string
  private _start: number
  private _end: number
  private _refName: string
  private _strand: number
  private _alignments: Record<string, AlignmentRecord>
  private _seq: string

  constructor(
    id: string,
    start: number,
    end: number,
    refName: string,
    strand: number,
    alignments: Record<string, AlignmentRecord>,
    seq: string,
  ) {
    this._id = id
    this._start = start
    this._end = end
    this._refName = refName
    this._strand = strand
    this._alignments = alignments
    this._seq = seq
  }

  get(name: string): any {
    switch (name) {
      case 'start':
        return this._start
      case 'end':
        return this._end
      case 'refName':
        return this._refName
      case 'strand':
        return this._strand
      case 'alignments':
        return this._alignments
      case 'seq':
        return this._seq
      default:
        return undefined
    }
  }

  id() {
    return this._id
  }

  toJSON() {
    return {
      uniqueId: this._id,
      start: this._start,
      end: this._end,
      refName: this._refName,
      strand: this._strand,
      alignments: this._alignments,
      seq: this._seq,
    }
  }
}