import { Tool } from "langchain/tools"
import { PublicKey } from "@solana/web3.js"

export class SolanaTradeTool extends Tool {
  name = "solana_trade"
  description = `This tool can be used to swap tokens to another token ( It uses Jupiter Exchange ).

  Inputs ( input is a JSON string ):
  outputMint: string, eg "So11111111111111111111111111111111111111112" or "SENDdRQtYMWaQrBroBrJ2Q53fgVuq95CV9UPGEvpCxa" (required)
  inputAmount: number, eg 1 or 0.01 (required)
  inputMint?: string, eg "So11111111111111111111111111111111111111112" (optional)
  slippageBps?: number, eg 100 (optional)`

  constructor(solanaKit) {
    super()
    this.solanaKit = solanaKit
  }

  async _call(input) {
    try {
      const parsedInput = JSON.parse(input)

      const tx = await this.solanaKit.trade(
        new PublicKey(parsedInput.outputMint),
        parsedInput.inputAmount,
        parsedInput.inputMint
          ? new PublicKey(parsedInput.inputMint)
          : new PublicKey("So11111111111111111111111111111111111111112"),
        parsedInput.slippageBps
      )

      return JSON.stringify({
        status: "success",
        message: "Trade executed successfully",
        transaction: tx,
        inputAmount: parsedInput.inputAmount,
        inputToken: parsedInput.inputMint || "SOL",
        outputToken: parsedInput.outputMint
      })
    } catch (error) {
      return JSON.stringify({
        status: "error",
        message: error.message,
        code: error.code || "UNKNOWN_ERROR"
      })
    }
  }
}