(*  MTE - the MirageOS Taler Exchange
    Copyright (C) 2025 Olivier Pierre <swrup@protonmail.com>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, version 3.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>. *)

let hello req _server _env =
  let open Vifu.Response in
  let open Syntax in
  let* () = with_string req "Hello~~\n" in
  let* () = add ~field:"content-type" "text/plain" in
  respond `OK

let routes =
  let open Vifu.Uri in
  let open Vifu.Route in
  let get path = get (path /?? any) in
  let post path jsont = post (Vifu.Type.json_encoding jsont) (path /?? any) in
  let v s = rel / s in
  let tos =
    [
      get rel --> hello;
      get (v "terms") --> Mte_terms.terms;
      get (v "privacy") --> Mte_terms.privacy;
    ]
  in
  let status_info =
    [
      get (v "seed") --> Mte_info.seed;
      get (v "config") --> Mte_info.config;
      get (v "keys") --> Mte_info.keys;
    ]
  in
  let management =
    let open Mte_management in
    let v s = v "management" / s in
    [
      get (v "keys") --> Keys_get.f;
      post (v "keys") Keys_post.jsont --> Keys_post.f;
      post (v "denominations" /% string `Path / "revoke") Denom_revoke.jsont
      --> Denom_revoke.f;
      post (v "signkeys" /% string `Path / "revoke") Signkey_revoke.jsont
      --> Signkey_revoke.f;
      post (v "auditors") Auditors.jsont --> Auditors.f;
      post (v "auditors" /% string `Path / "disable") Auditors_disable.jsont
      --> Auditors_disable.f;
      post (v "wire-fee") Wire_fee.jsont --> Wire_fee.f;
      post (v "global-fees") Global_fees.jsont --> Global_fees.f;
      post (v "wire") Wire.jsont --> Wire.f;
      post (v "wire" / "disable") Wire_disable.jsont --> Wire_disable.f;
      post (v "drain") Drain.jsont --> Drain.f;
      post (v "aml-officers") AmlOfficer.jsont --> AmlOfficer.f;
      post (v "partners") Partners.jsont --> Partners.f;
    ]
  in
  tos @ status_info @ management

let caqti_get_ok = function
  | Error e -> Fmt.failwith "%a" Caqti_error.pp e
  | Ok v -> v

let test (module Conn : Caqti_miou.CONNECTION) =
  let minus_req =
    let open Caqti_request.Infix in
    let open Caqti_type in
    (t2 int int ->! int) "SELECT ? - ?"
  in
  let a = 22 in
  let b = 17 in
  let c = Conn.find minus_req (22, 17) |> caqti_get_ok in
  assert (a - b = c);
  Logs.app (fun f -> f "%d - %d = %d" a b c);
  ()

let disconnect (module Conn : Caqti_miou.CONNECTION) = Conn.disconnect ()

module RNG = Mirage_crypto_rng.Fortuna

let () =
  let ( let@ ) finally fn = Fun.protect ~finally fn in
  Util.Log_reporter.setup ();
  let rng =
    let rng () = Mirage_crypto_rng_mkernel.initialize (module RNG) in
    Mkernel.map rng Mkernel.[]
  in
  let storage = Mkernel.storage ~name:"storage" in
  let service =
    let ipv4 = Ipaddr.V4.Prefix.of_string_exn "10.0.0.2/24" in
    Mnet.stack ~name:"service" ipv4
  in
  Mkernel.(run [ rng; storage; service ])
  @@ fun rng storage (stack, tcp, udp) () ->
  let@ () = fun () -> Mirage_crypto_rng_mkernel.kill rng in
  let@ () = fun () -> Mnet.kill stack in
  (* -- setup db connection -- *)
  let hed, he = Mnet_happy_eyeballs.create tcp in
  let@ () = fun () -> Mnet_happy_eyeballs.kill hed in
  let dns = Mnet_dns.create (udp_db, he) in
  let t = Mnet_dns.transport dns in
  let@ () = fun () -> Mnet_dns.Transport.kill t in
  Caqti_miou.Switch.run @@ fun sw ->
  Logs.app (fun m -> m "Connecting to the database");
  let db_connection =
    let config = Caqti_connect_config.default in
    let r = Caqti_mnet.connect ~config ~sw stack tcp dns db_uri in
    caqti_get_ok r
  in
  let@ () = fun () -> disconnect db_connection in
  Logs.app (fun m -> m "Connected");
  test db_connection;
  Logs.app (fun m -> m "Test OK");
  (* -- *)
  (* -- start webserver -- *)
  let devices = [] in
  let cfg = Vifu.Config.v Config.Exchange.port in
  let db_device = Devices.db_connection sw in
  let keys_device = Devices.keys storage (Vifu.Device.value db_device) in
  let devices = Vifu.Devices.[ db_device; keys_device ] in
  Vifu.run ~cfg ~devices tcp routes ()

(*
  Miou_unix.run @@ fun () ->
  Caqti_miou.Switch.run @@ fun caqti_switch ->
  let env : Devices.env =
    { caqti_switch; db_uri= Config.Exchangedb_postgres.config }
  in
  let devices = Vifu.Devices.[ Devices.db_connection; Devices.keys ] in
  let middlewares = Vifu.Middlewares.[] in
  Logs.info (fun m ->
      m ~tags:(Util.Log_reporter.detail "...") "Starting MTE server");
  Vifu.run ~cfg ~devices ~middlewares routes env
  *)