// dep_tree_min_string.nyash — minimal include-only dependency tree (no Array/Map plugins)

static box Main {
  has_in_stack(stack, p) {
    // check if stack contains "\n" + p + "\n"
    local t = "\n" + p + "\n"
    local n = stack.length()
    local m = t.length()
    if m == 0 { return 0 }
    local i = 0
    loop(i + m <= n) {
      if stack.substring(i, i+m) == t { return 1 }
      i = i + 1
    }
    return 0
  }
  read_all(path) {
    local fb = new FileBox()
    local ok = fb.open(path, "r")
    if ok == false { return null }
    local s = fb.read()
    fb.close()
    return s
  }

  dirname(path) {
    local pb = new PathBox()
    local d = pb.dirname(path)
    if d != null { return d }
    local i = path.lastIndexOf("/")
    if i < 0 { return "." }
    return path.substring(0, i)
  }

  join(base, rel) {
    local pb = new PathBox()
    local j = pb.join(base, rel)
    if j != null { return j }
    return base + "/" + rel
  }

  esc_json(s) {
    // very small escaper: replace \ and "
    local out = ""
    local i = 0
    local n = s.length()
    loop(i < n) {
      local ch = s.substring(i, i+1)
      if ch == "\\" { out = out + "\\\\" } else {
        if ch == "\"" { out = out + "\\\"" } else { out = out + ch }
      }
      i = i + 1
    }
    return out
  }

  node_json(path, stack, depth) {
    // safety valve: max depth
    if depth >= 64 {
      return "{\\\"path\\\":\\\"" + me.esc_json(path) + "\\\",\\\"includes\\\":[],\\\"children\\\":[]}"
    }
    local src = me.read_all(path)
    if src == null {
      return "{\\\"path\\\":\\\"" + me.esc_json(path) + "\\\",\\\"includes\\\":[],\\\"children\\\":[]}"
    }
    local base = me.dirname(path)
    local incs = ""
    local inc_first = 1
    local children = ""
    local child_first = 1
    local i = 0
    local n = src.length()
    local in_str = 0
    local in_cmt = 0
    loop(i < n) {
      local ch = src.substring(i, i+1)
      // handle line comments (// or #)
      if in_cmt == 1 {
        if ch == "\n" { in_cmt = 0 }
        i = i + 1
      } else if in_str == 1 {
        if ch == "\"" {
          // if previous is not backslash, close
          if i == 0 { in_str = 0 } else {
            local prev = src.substring(i-1, i)
            if prev != "\\" { in_str = 0 }
          }
        }
        i = i + 1
      } else if ch == "/" && i + 1 < n && src.substring(i+1, i+2) == "/" {
        // start // comment
        in_cmt = 1
        i = i + 2
      } else if ch == "#" {
        // start # comment
        in_cmt = 1
        i = i + 1
      } else if ch == "\"" {
        // enter string
        in_str = 1
        i = i + 1
      } else if i + 9 <= n && src.substring(i, i+9) == "include \"" {
        // look for include "..."
        local j = i + 9
        // find closing quote (respect escapes) without using break
        local found = 0
        loop(j < n && found == 0) {
          if src.substring(j, j+1) == "\"" {
            local prev = src.substring(j-1, j)
            if prev != "\\" { found = 1 } else { j = j + 1 }
          } else {
            j = j + 1
          }
        }
        if found == 1 {
          local p = src.substring(i+9, j)
          if inc_first == 1 {
            incs = incs + "\"" + me.esc_json(p) + "\""
            inc_first = 0
          } else {
            incs = incs + ",\"" + me.esc_json(p) + "\""
          }
          local child_path = me.join(base, p)
          // cycle detection: if child_path already in stack, do not recurse
          local cj = null
          if me.has_in_stack(stack, child_path) == 1 {
            cj = "{\\\"path\\\":\\\"" + me.esc_json(child_path) + "\\\",\\\"includes\\\":[],\\\"children\\\":[]}"
          } else {
            cj = me.node_json(child_path, stack + child_path + "\n", depth + 1)
          }
          if child_first == 1 {
            children = children + cj
            child_first = 0
          } else {
            children = children + "," + cj
          }
          i = j + 1
        } else {
          i = i + 1
        }
      } else {
        i = i + 1
      }
    }
    return "{\\\"path\\\":\\\"" + me.esc_json(path) + "\\\",\\\"includes\\\":[" + incs + "],\\\"children\\\":[" + children + "]}"
  }

  main(args) {
    local console = new ConsoleBox()
    // Determine entry path (avoid stdin to keep VM path simple)
    local entry = null
    if args != null && args.length() >= 1 { entry = args.get(0) }
    if entry == null || entry == "" { entry = "apps/selfhost/ny-parser-nyash/main.nyash" }
    local tree = me.node_json(entry, "\n" + entry + "\n", 0)
    local out = "{\\\"version\\\":1,\\\"root_path\\\":\\\"" + me.esc_json(entry) + "\\\",\\\"tree\\\":" + tree + "}"
    console.println(out)
    return 0
  }
}