(* Auto-generated from "adapter.atd" by atdml. *)

type text = {
  title: string;
  body: string;
}

val create_text : title:string -> body:string -> unit -> text
val text_of_yojson : Yojson.Safe.t -> text
val text_of_jsonlike : Atd_jsonlike.AST.t -> text
val yojson_of_text : text -> Yojson.Safe.t
val text_of_json : string -> text
val json_of_text : text -> string

module Text : sig
  type nonrec t = text
  val create : title:string -> body:string -> unit -> t
  val of_yojson : Yojson.Safe.t -> t
  val of_jsonlike : Atd_jsonlike.AST.t -> t
  val to_yojson : t -> Yojson.Safe.t
  val of_json : string -> t
  val to_json : t -> string
end

type image = {
  url: string;
}

val create_image : url:string -> unit -> image
val image_of_yojson : Yojson.Safe.t -> image
val image_of_jsonlike : Atd_jsonlike.AST.t -> image
val yojson_of_image : image -> Yojson.Safe.t
val image_of_json : string -> image
val json_of_image : image -> string

module Image : sig
  type nonrec t = image
  val create : url:string -> unit -> t
  val of_yojson : Yojson.Safe.t -> t
  val of_jsonlike : Atd_jsonlike.AST.t -> t
  val to_yojson : t -> Yojson.Safe.t
  val of_json : string -> t
  val to_json : t -> string
end

type document =
  | Image of image
  | Text of text

val document_of_yojson : Yojson.Safe.t -> document
val document_of_jsonlike : Atd_jsonlike.AST.t -> document
val yojson_of_document : document -> Yojson.Safe.t
val document_of_json : string -> document
val json_of_document : document -> string

module Document : sig
  type nonrec t = document
  val of_yojson : Yojson.Safe.t -> t
  val of_jsonlike : Atd_jsonlike.AST.t -> t
  val to_yojson : t -> Yojson.Safe.t
  val of_json : string -> t
  val to_json : t -> string
end

--- ml ---
(* Auto-generated from "adapter.atd" by atdml. *)
[@@@ocaml.warning "-27-32-33-35-39"]

(* Inlined runtime — no external dependency needed. *)
module Atdml_runtime = struct
  (* Returns true iff the list has strictly more than [n] elements,
     without traversing past element n+1. *)
  let rec list_length_gt n = function
    | _ :: rest -> if n = 0 then true else list_length_gt (n - 1) rest
    | [] -> false

  module Yojson = struct
    let bad_type expected_type x =
      Printf.ksprintf failwith "expected %s, got: %s"
        expected_type (Yojson.Safe.to_string x)

    let bad_sum type_name x =
      Printf.ksprintf failwith "invalid variant for type '%s': %s"
        type_name (Yojson.Safe.to_string x)

    let missing_field type_name field_name =
      Printf.ksprintf failwith "missing field '%s' in object of type '%s'"
        field_name type_name

    let bool_of_yojson = function
      | `Bool b -> b
      | x -> bad_type "bool" x

    let yojson_of_bool b = `Bool b

    let int_of_yojson = function
      | `Int n -> n
      | x -> bad_type "int" x

    let yojson_of_int n = `Int n

    let float_of_yojson = function
      | `Float f -> f
      | `Int n -> Float.of_int n
      | x -> bad_type "float" x

    let yojson_of_float f = `Float f

    let string_of_yojson = function
      | `String s -> s
      | x -> bad_type "string" x

    let yojson_of_string s = `String s

    let unit_of_yojson = function
      | `Null -> ()
      | x -> bad_type "null" x

    let yojson_of_unit () = `Null

    let list_of_yojson f = function
      | `List xs -> List.map f xs
      | x -> bad_type "array" x

    let yojson_of_list f xs = `List (List.map f xs)

    let option_of_yojson f = function
      | `String "None" -> None
      | `List [`String "Some"; x] -> Some (f x)
      | x -> bad_type "option" x

    let yojson_of_option f = function
      | None -> `String "None"
      | Some x -> `List [`String "Some"; f x]

    let nullable_of_yojson f = function
      | `Null -> None
      | x -> Some (f x)

    let yojson_of_nullable f = function
      | None -> `Null
      | Some x -> f x

    let assoc_of_yojson f = function
      | `Assoc pairs -> List.map (fun (k, v) -> (k, f v)) pairs
      | x -> bad_type "object" x

    let yojson_of_assoc f xs =
      `Assoc (List.map (fun (k, v) -> (k, f v)) xs)
  end

  module Jsonlike = struct
    let bad_type expected_type x =
      Printf.ksprintf failwith "%sexpected %s"
        (Atd_jsonlike.AST.loc_msg x) expected_type

    let bad_sum type_name x =
      Printf.ksprintf failwith "%sinvalid variant for type '%s'"
        (Atd_jsonlike.AST.loc_msg x) type_name

    let missing_field node type_name field_name =
      Printf.ksprintf failwith "%smissing field '%s' in object of type '%s'"
        (Atd_jsonlike.AST.loc_msg node) field_name type_name

    let bool_of_jsonlike = function
      | Atd_jsonlike.AST.Bool (_, b) -> b
      | x -> bad_type "bool" x

    let int_of_jsonlike = function
      | Atd_jsonlike.AST.Number (_, n) as node ->
          (match n.Atd_jsonlike.Number.int with
          | Some i -> i
          | None -> bad_type "integer" node)
      | x -> bad_type "int" x

    let float_of_jsonlike = function
      | Atd_jsonlike.AST.Number (_, n) as node ->
          (match n.Atd_jsonlike.Number.float with
          | Some f -> f
          | None -> bad_type "float" node)
      | x -> bad_type "float" x

    let string_of_jsonlike = function
      | Atd_jsonlike.AST.String (_, s) -> s
      | x -> bad_type "string" x

    let unit_of_jsonlike = function
      | Atd_jsonlike.AST.Null _ -> ()
      | x -> bad_type "null" x

    let list_of_jsonlike f = function
      | Atd_jsonlike.AST.Array (_, xs) -> List.map f xs
      | x -> bad_type "array" x

    let option_of_jsonlike f = function
      | Atd_jsonlike.AST.String (_, "None") -> None
      | Atd_jsonlike.AST.Array (_, [Atd_jsonlike.AST.String (_, "Some"); x]) -> Some (f x)
      | x -> bad_type "option" x

    let nullable_of_jsonlike f = function
      | Atd_jsonlike.AST.Null _ -> None
      | x -> Some (f x)

    let assoc_of_jsonlike f = function
      | Atd_jsonlike.AST.Object (_, pairs) ->
          List.map (fun (_, k, v) -> (k, f v)) pairs
      | x -> bad_type "object" x
  end
end

type text = {
  title: string;
  body: string;
}

let create_text ~title ~body () : text =
  { title; body }

let text_of_yojson (x : Yojson.Safe.t) : text =
  match x with
  | `Assoc fields ->
    (* Duplicate JSON keys: behavior is unspecified (RFC 8259 §4 says keys SHOULD
       be unique). Below the threshold, List.assoc_opt returns the first binding;
       above it, the hashtable returns the last. *)
    let assoc_ =
      if Atdml_runtime.list_length_gt 5 fields then
        let tbl = Hashtbl.create 16 in
        List.iter (fun (k, v) -> Hashtbl.add tbl k v) fields;
        (fun key -> Hashtbl.find_opt tbl key)
      else (fun key -> List.assoc_opt key fields)
    in
    let title =
      match assoc_ "title" with
      | Some v -> Atdml_runtime.Yojson.string_of_yojson v
      | None -> Atdml_runtime.Yojson.missing_field "text" "title"
    in
    let body =
      match assoc_ "body" with
      | Some v -> Atdml_runtime.Yojson.string_of_yojson v
      | None -> Atdml_runtime.Yojson.missing_field "text" "body"
    in
    { title; body }
  | _ -> Atdml_runtime.Yojson.bad_type "text" x

let text_of_jsonlike (x : Atd_jsonlike.AST.t) : text =
  match x with
  | Atd_jsonlike.AST.Object (_, fields) ->
    let atdml_node_ = x in
    let assoc_ =
      if Atdml_runtime.list_length_gt 5 fields then
        let tbl = Hashtbl.create 16 in
        List.iter (fun (_, k, v) -> Hashtbl.add tbl k v) fields;
        (fun key -> Hashtbl.find_opt tbl key)
      else
        (fun key ->
          match List.find_opt (fun (_, k, _) -> k = key) fields with
          | None -> None | Some (_, _, v) -> Some v)
    in
    let title =
      match assoc_ "title" with
      | Some v -> Atdml_runtime.Jsonlike.string_of_jsonlike v
      | None -> Atdml_runtime.Jsonlike.missing_field atdml_node_ "text" "title"
    in
    let body =
      match assoc_ "body" with
      | Some v -> Atdml_runtime.Jsonlike.string_of_jsonlike v
      | None -> Atdml_runtime.Jsonlike.missing_field atdml_node_ "text" "body"
    in
    { title; body }
  | _ -> Atdml_runtime.Jsonlike.bad_type "text" x

let yojson_of_text (x : text) : Yojson.Safe.t =
  `Assoc (List.concat [
    [("title", Atdml_runtime.Yojson.yojson_of_string x.title)];
    [("body", Atdml_runtime.Yojson.yojson_of_string x.body)];
  ])

let text_of_json s =
  text_of_yojson (Yojson.Safe.from_string s)

let json_of_text x =
  Yojson.Safe.to_string (yojson_of_text x)

module Text = struct
  type nonrec t = text
  let create = create_text
  let of_yojson = text_of_yojson
  let of_jsonlike = text_of_jsonlike
  let to_yojson = yojson_of_text
  let of_json = text_of_json
  let to_json = json_of_text
end

type image = {
  url: string;
}

let create_image ~url () : image =
  { url }

let image_of_yojson (x : Yojson.Safe.t) : image =
  match x with
  | `Assoc fields ->
    (* Duplicate JSON keys: behavior is unspecified (RFC 8259 §4 says keys SHOULD
       be unique). Below the threshold, List.assoc_opt returns the first binding;
       above it, the hashtable returns the last. *)
    let assoc_ =
      if Atdml_runtime.list_length_gt 5 fields then
        let tbl = Hashtbl.create 16 in
        List.iter (fun (k, v) -> Hashtbl.add tbl k v) fields;
        (fun key -> Hashtbl.find_opt tbl key)
      else (fun key -> List.assoc_opt key fields)
    in
    let url =
      match assoc_ "url" with
      | Some v -> Atdml_runtime.Yojson.string_of_yojson v
      | None -> Atdml_runtime.Yojson.missing_field "image" "url"
    in
    { url }
  | _ -> Atdml_runtime.Yojson.bad_type "image" x

let image_of_jsonlike (x : Atd_jsonlike.AST.t) : image =
  match x with
  | Atd_jsonlike.AST.Object (_, fields) ->
    let atdml_node_ = x in
    let assoc_ =
      if Atdml_runtime.list_length_gt 5 fields then
        let tbl = Hashtbl.create 16 in
        List.iter (fun (_, k, v) -> Hashtbl.add tbl k v) fields;
        (fun key -> Hashtbl.find_opt tbl key)
      else
        (fun key ->
          match List.find_opt (fun (_, k, _) -> k = key) fields with
          | None -> None | Some (_, _, v) -> Some v)
    in
    let url =
      match assoc_ "url" with
      | Some v -> Atdml_runtime.Jsonlike.string_of_jsonlike v
      | None -> Atdml_runtime.Jsonlike.missing_field atdml_node_ "image" "url"
    in
    { url }
  | _ -> Atdml_runtime.Jsonlike.bad_type "image" x

let yojson_of_image (x : image) : Yojson.Safe.t =
  `Assoc (List.concat [
    [("url", Atdml_runtime.Yojson.yojson_of_string x.url)];
  ])

let image_of_json s =
  image_of_yojson (Yojson.Safe.from_string s)

let json_of_image x =
  Yojson.Safe.to_string (yojson_of_image x)

module Image = struct
  type nonrec t = image
  let create = create_image
  let of_yojson = image_of_yojson
  let of_jsonlike = image_of_jsonlike
  let to_yojson = yojson_of_image
  let of_json = image_of_json
  let to_json = json_of_image
end

type document =
  | Image of image
  | Text of text

let document_of_yojson (x : Yojson.Safe.t) : document =
  let x = My_adapter.normalize x in
  match x with
  | `List [`String "Image"; v] -> Image (image_of_yojson v)
  | `List [`String "Text"; v] -> Text (text_of_yojson v)
  | _ -> Atdml_runtime.Yojson.bad_sum "document" x

let document_of_jsonlike (x : Atd_jsonlike.AST.t) : document =
  let x = My_adapter.normalize_jsonlike x in
  match x with
  | Atd_jsonlike.AST.Array (_, [Atd_jsonlike.AST.String (_, "Image"); v]) -> Image (image_of_jsonlike v)
  | Atd_jsonlike.AST.Array (_, [Atd_jsonlike.AST.String (_, "Text"); v]) -> Text (text_of_jsonlike v)
  | _ -> Atdml_runtime.Jsonlike.bad_sum "document" x

let yojson_of_document (x : document) : Yojson.Safe.t =
  let atdml_result_ =
    match x with
    | Image v -> `List [`String "Image"; yojson_of_image v]
    | Text v -> `List [`String "Text"; yojson_of_text v]
  in My_adapter.restore atdml_result_

let document_of_json s =
  document_of_yojson (Yojson.Safe.from_string s)

let json_of_document x =
  Yojson.Safe.to_string (yojson_of_document x)

module Document = struct
  type nonrec t = document
  let of_yojson = document_of_yojson
  let of_jsonlike = document_of_jsonlike
  let to_yojson = yojson_of_document
  let of_json = document_of_json
  let to_json = json_of_document
end

--- Input:
{ "type": "Image", "url": "https://example.com/pic.jpg" }
--- Output:
{ "type": "Image", "url": "https://example.com/pic.jpg" }
