// Phase 74-SSA: Critical reproduction - box delegates to static box AND calls via me.method()
// Goal: Reproduce ValueId undef with the EXACT pattern from ParserBox
//
// Critical pattern found:
// - ParserBox had: me.to_int() → calls ParserBox.to_int() → delegates to ParserStringUtilsBox.to_int()
// - This is: instance call → instance method → static box delegation
//
// This is the key difference from the original minimal code!

static box TargetBox {
  is_digit(ch) {
    if ch >= "0" && ch <= "9" { return 1 }
    return 0
  }

  to_int(s) {
    if s == null { return 0 }
    local str = "" + s
    local n = str.length()
    if n == 0 { return 0 }
    local i = 0
    local acc = 0
    loop(i < n) {
      local ch = str.substring(i, i + 1)
      if ch < "0" || ch > "9" { break }
      acc = acc * 10 + ("0123456789".indexOf(ch))
      i = i + 1
    }
    return acc
  }

  trim(s) {
    if s == null { return "" }
    local str = "" + s
    return str
  }
}

box DelegateBox {
  gpos

  birth() {
    me.gpos = 0
    return 0
  }

  // Phase 74-SSA: These delegation methods should cause SSA undef when called via me.method()
  is_digit(ch) {
    return TargetBox.is_digit(ch)
  }

  to_int(s) {
    return TargetBox.to_int(s)
  }

  trim(s) {
    return TargetBox.trim(s)
  }

  // Method that calls me.to_int() - THIS IS THE CRITICAL PATTERN
  parse_number(text) {
    local pos = text.lastIndexOf("@")
    if pos >= 0 {
      local num_str = text.substring(pos + 1, text.length())
      // 🔥 THIS IS IT: me.to_int() calls the delegation method
      local num = me.to_int(num_str)
      me.gpos = num
      return num
    }
    return 0
  }

  // Another method calling me.is_digit() via me
  check_char(ch) {
    // 🔥 me.is_digit() → ParserBox pattern
    return me.is_digit(ch)
  }

  // Method calling me.trim()
  clean_text(text) {
    // 🔥 me.trim() → ParserBox pattern
    return me.trim(text)
  }
}

box Main {
  main() {
    local delegate = new DelegateBox()

    // Test parse_number (me.to_int delegation)
    local num = delegate.parse_number("data@42")

    // Test check_char (me.is_digit delegation)
    local d = delegate.check_char("7")

    // Test clean_text (me.trim delegation)
    local text = delegate.clean_text("  hello  ")

    // Use results to avoid dead code elimination
    if num == 42 && d == 1 && text.length() > 0 {
      return 0
    }
    return 1
  }
}