/* eslint-disable @typescript-eslint/no-unused-vars */
import {
  address,
  Address,
  fetchEncodedAccount,
  fetchEncodedAccounts,
  GetAccountInfoApi,
  GetMultipleAccountsApi,
  Rpc,
} from "@solana/kit"
/* eslint-enable @typescript-eslint/no-unused-vars */
import BN from "bn.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as borsh from "@coral-xyz/borsh" // eslint-disable-line @typescript-eslint/no-unused-vars
import { borshAddress } from "../utils" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"

export interface SlidingResultAccountDataFields {
  data: Array<types.SlidingWindowElementFields>
  bump: number
  ebuf: Array<number>
}

export interface SlidingResultAccountDataJSON {
  data: Array<types.SlidingWindowElementJSON>
  bump: number
  ebuf: Array<number>
}

export class SlidingResultAccountData {
  readonly data: Array<types.SlidingWindowElement>
  readonly bump: number
  readonly ebuf: Array<number>

  static readonly discriminator = Buffer.from([
    91, 4, 83, 187, 102, 216, 153, 254,
  ])

  static readonly layout = borsh.struct<SlidingResultAccountData>([
    borsh.array(types.SlidingWindowElement.layout(), 16, "data"),
    borsh.u8("bump"),
    borsh.array(borsh.u8(), 512, "ebuf"),
  ])

  constructor(fields: SlidingResultAccountDataFields) {
    this.data = fields.data.map(
      (item) => new types.SlidingWindowElement({ ...item })
    )
    this.bump = fields.bump
    this.ebuf = fields.ebuf
  }

  static async fetch(
    rpc: Rpc<GetAccountInfoApi>,
    address: Address,
    programId: Address = PROGRAM_ID
  ): Promise<SlidingResultAccountData | null> {
    const info = await fetchEncodedAccount(rpc, address)

    if (!info.exists) {
      return null
    }
    if (info.programAddress !== programId) {
      throw new Error("account doesn't belong to this program")
    }

    return this.decode(Buffer.from(info.data))
  }

  static async fetchMultiple(
    rpc: Rpc<GetMultipleAccountsApi>,
    addresses: Address[],
    programId: Address = PROGRAM_ID
  ): Promise<Array<SlidingResultAccountData | null>> {
    const infos = await fetchEncodedAccounts(rpc, addresses)

    return infos.map((info) => {
      if (!info.exists) {
        return null
      }
      if (info.programAddress !== programId) {
        throw new Error("account doesn't belong to this program")
      }

      return this.decode(Buffer.from(info.data))
    })
  }

  static decode(data: Buffer): SlidingResultAccountData {
    if (!data.slice(0, 8).equals(SlidingResultAccountData.discriminator)) {
      throw new Error("invalid account discriminator")
    }

    const dec = SlidingResultAccountData.layout.decode(data.slice(8))

    return new SlidingResultAccountData({
      data: dec.data.map(
        (
          item: any /* eslint-disable-line @typescript-eslint/no-explicit-any */
        ) => types.SlidingWindowElement.fromDecoded(item)
      ),
      bump: dec.bump,
      ebuf: dec.ebuf,
    })
  }

  toJSON(): SlidingResultAccountDataJSON {
    return {
      data: this.data.map((item) => item.toJSON()),
      bump: this.bump,
      ebuf: this.ebuf,
    }
  }

  static fromJSON(obj: SlidingResultAccountDataJSON): SlidingResultAccountData {
    return new SlidingResultAccountData({
      data: obj.data.map((item) => types.SlidingWindowElement.fromJSON(item)),
      bump: obj.bump,
      ebuf: obj.ebuf,
    })
  }
}