package p4spectec

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package p4spectec
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module Typ = Runtime.Type.Typ
module Value = Runtime.Value
open Util.Source

module Make (Spec_Func : Spec.Func.S) = struct
  module Spec = struct
    module Func = Spec_Func
  end

  (* Match-action table interface *)

  let find_table (value_arch : Value.t) (value_tableName : Value.t) : Value.t =
    let find_table_unqualified table_name_unqualified =
      let value_tableName_unqualified =
        Value.Make.text table_name_unqualified
      in
      Spec.Func.find_object_unqualified_e value_arch value_tableName_unqualified
      |> Option.get
    in
    let table_name = Value.Get.text value_tableName in
    match String.split_on_char '.' table_name with
    | [] -> assert false
    | [ table_name_unqualified ] ->
        find_table_unqualified table_name_unqualified
    | names -> (
        let typ_objectId =
          Typ.Make.var ("nameIR" $ no_region) [] |> Typ.Make.list
        in
        let values_name = List.map Value.Make.text names in
        let value_objectId = Value.Make.list typ_objectId values_name in
        match Spec.Func.find_object_qualified_e value_arch value_objectId with
        | Some value_table -> value_table
        | None ->
            let table_name_unqualified = names |> List.rev |> List.hd in
            find_table_unqualified table_name_unqualified)

  let update_table (value_arch : Value.t) (value_tableName : Value.t)
      (value_tableObject : Value.t) : Value.t =
    let update_table_unqualified table_name_unqualified =
      let value_tableName_unqualified =
        Value.Make.text table_name_unqualified
      in
      Spec.Func.update_object_unqualified_e value_arch
        value_tableName_unqualified value_tableObject
    in
    let table_name = Value.Get.text value_tableName in
    match String.split_on_char '.' table_name with
    | [] -> assert false
    | [ table_name_unqualified ] ->
        update_table_unqualified table_name_unqualified
    | names ->
        let typ_objectId =
          Typ.Make.var ("nameIR" $ no_region) [] |> Typ.Make.list
        in
        let values_name = List.map Value.Make.text names in
        let value_objectId = Value.Make.list typ_objectId values_name in
        if
          Spec.Func.find_object_qualified_e value_arch value_objectId
          |> Option.is_some
        then
          Spec.Func.update_object_qualified_e value_arch value_objectId
            value_tableObject
        else
          let table_name_unqualified = names |> List.rev |> List.hd in
          update_table_unqualified table_name_unqualified

  let add_entry (value_ctx : Value.t) (value_arch : Value.t)
      (value_tableName : Value.t) (value_tableEntryPriorityInterface : Value.t)
      (value_tableKeysetInterface : Value.t)
      (value_tableActionInterface : Value.t) : Value.t =
    (* Lookup table object *)
    let value_tableObject = find_table value_arch value_tableName in
    (* Add entry to table object *)
    let value_tableObject =
      match
        Spec.Func.tableObject_add_entry value_ctx value_tableObject
          value_tableEntryPriorityInterface value_tableKeysetInterface
          value_tableActionInterface
      with
      | Some value_tableObject -> value_tableObject
      | None ->
          (* Replace the key names of the keyset interface with those of the table,
             assuming key fields are given in order *)
          let values_nameIR_key =
            Spec.Func.key_interface_of_tableObject value_tableObject
            |> List.filter_map
                 (fun
                   (value_nameIR_key, value_nameIR_matchKind, _value_typeIR) ->
                   if Value.Get.text value_nameIR_matchKind = "selector" then
                     None
                   else Some value_nameIR_key)
          in
          let values_tableKeyInterface =
            Value.Get.list value_tableKeysetInterface
          in
          let values_tableKeyValueInterface =
            values_tableKeyInterface |> List.map Value.Get.tuple
            |> List.map (fun values -> List.nth values 1)
          in
          let typ_tableKeyInterface =
            Typ.Make.var ("tableKeyInterface" $ no_region) []
          in
          let typ_tableKeyInterfaceList = Typ.Make.list typ_tableKeyInterface in
          let value_tableKeysetInterface =
            List.map2
              (fun value_nameIR_key value_tableKeyValueInterface ->
                [ value_nameIR_key; value_tableKeyValueInterface ])
              values_nameIR_key values_tableKeyValueInterface
            |> List.map (Value.Make.tuple typ_tableKeyInterface)
            |> Value.Make.list typ_tableKeyInterfaceList
          in
          Spec.Func.tableObject_add_entry value_ctx value_tableObject
            value_tableEntryPriorityInterface value_tableKeysetInterface
            value_tableActionInterface
          |> Option.get
    in
    (* Update arch with modified table object *)
    update_table value_arch value_tableName value_tableObject

  let add_default_action (value_ctx : Value.t) (value_arch : Value.t)
      (value_tableName : Value.t) (value_tableActionInterface : Value.t) :
      Value.t =
    (* Lookup table object *)
    let value_tableObject = find_table value_arch value_tableName in
    (* Add entry to table object *)
    let value_tableObject =
      Spec.Func.tableObject_add_default_action value_ctx value_tableObject
        value_tableActionInterface
    in
    (* Update arch with modified table object *)
    update_table value_arch value_tableName value_tableObject
end