// Package cli provides result formatting and interactive confirmation that
// reproduce the original kisstron.py presult() and trconfirm() behaviour.
package cli

import (
  "bufio"
  "fmt"
  "os"
  "strings"
)

// Result is the outcome of an operation, mirroring the original
// {success, message, result} dictionary returned by every kisstron function.
type Result struct {
  Success bool
  Message string
  Result  any
}

var reader = bufio.NewReader(os.Stdin)

// formatResult renders the presult() output: a "Success:" or "Error:" header,
// the message, and a trailing blank line.
func formatResult(r Result) string {
  header := "Error:"
  if r.Success {
    header = "Success:"
  }
  return fmt.Sprintf("%s\n%s\n\n", header, r.Message)
}

// PrintResult reproduces presult() exactly.
func PrintResult(r Result) {
  fmt.Print(formatResult(r))
}

// ReadLine prints prompt and reads a single line from stdin.
func ReadLine(prompt string) string {
  fmt.Print(prompt)
  line, err := reader.ReadString('\n')
  if err != nil && line == "" {
    return ""
  }
  return strings.TrimRight(line, "\r\n")
}

// Confirm asks the user to type "yes" and aborts with exit code 0 otherwise,
// matching trconfirm().
func Confirm(prompt string) {
  if strings.ToLower(ReadLine(prompt)) != "yes" {
    fmt.Println("Transaction not confirmed, aborting!")
    os.Exit(0)
  }
}