open Lwt.Infix

(* komm / konsole / tafel *)

module Lump = struct
  module Pile = Irmin_unix.Git.FS.KV(Irmin.Contents.String)
  type t = { conf : Irmin.config;
             repo : Pile.Repo.t;
             branch : Pile.branch;
             path : string list;
           }

  let branch repo_loc branch =
    let repo = Lwt_main.run (Pile.Repo.v (Irmin_git.config repo_loc)) in
    Lwt_main.run (Pile.of_branch repo branch)
    
  let get repo_loc branch path =
    let repo = Lwt_main.run (Pile.Repo.v (Irmin_git.config repo_loc)) in
    let branch = Lwt_main.run (Pile.of_branch repo branch) in
    let node = Pile.get branch path in
    Lwt_main.run node
  
(*  val pile_conf path = Irmin_git.config path
  val pile_repo conf = Pile.Repo.v conf
  val pile_branch conf name = pile_repo conf*)
end

(*let pos = ref (Lump.get "./kommstore" "current" ["init"])*)
(* magic position [ref Lump.t]*)



open Tsdl

open Wall
module I = Image
module P = Path
module Text = Wall_text

let gray ?(a=1.0) v = Color.v v v v a

let load_font name =
  let ic = open_in_bin name in
  let dim = in_channel_length ic in
  let fd = Unix.descr_of_in_channel ic in
  let buffer =
    Unix.map_file fd Bigarray.int8_unsigned Bigarray.c_layout false [|dim|]
    |> Bigarray.array1_of_genarray
  in
  let offset = List.hd (Stb_truetype.enum buffer) in
  match Stb_truetype.init buffer offset with
  | None -> assert false
  | Some font -> font

let font_icons = lazy (load_font "entypo.ttf")
let font_sans = lazy (load_font "Roboto-Regular.ttf")
let font_sans_bold = lazy (load_font "Roboto-Bold.ttf")
let font_emoji = lazy (load_font "NotoEmoji-Regular.ttf")

let w = 1000
let h = 600
let f = try float_of_string Sys.argv.(1) with _ -> 1.0
let fw = int_of_float (f *. float w)
let fh = int_of_float (f *. float h)

let draw_label text x y w h =
  I.paint (Paint.color (gray ~a:0.5 1.0))
    Text.(simple_text
            (Font.make ~size:18.0 (Lazy.force font_sans))
            ~valign:`MIDDLE ~halign:`LEFT
            ~x ~y:(y+.h*.0.5) text)

let draw_demo x y w h t = (
  let node = ref I.empty in
  let push n = node := I.stack !node n in
  push @@ draw_label "hello world" x y 280.0 20.0;
  !node
)

let draw_lumptree x y w h t = (
  let node = ref I.empty in
  let push n = node := I.stack !node n in
  let pile = Lump.branch "./kommpile" "current" in
  let lumplist = Lwt_main.run (Lump.Pile.list pile []) in
  Printf.printf "Lumplist length: %d\n" (List.length lumplist);
  List.iter (fun (step, tree) ->
      let path = step (*List.fold_left (fun s e -> s ^ e) "" step*) in
      print_endline ("Path: " ^ path);
      push @@ draw_label path x y 280.0 20.0; ()
    ) lumplist;
  !node
)

let render context sw sh t =
  let lw = float w in
  let lh = float h in
  let pw = lw *. f *. sw in
  let ph = lh *. f *. sh in
  Renderer.render context ~width:pw ~height:ph
    (Image.seq [
         draw_lumptree 100. 200. lw lh t;
         draw_demo 100. 100. lw lh t;
       ]
    )

open Tgles2

let main () =
  print_endline "komm main.ml";
  Printexc.record_backtrace true;
  match Sdl.init Sdl.Init.video with
  | Error (`Msg e) -> Sdl.log "Init error: %s" e; exit 1
  | Ok () ->
    ignore (Sdl.gl_set_attribute Sdl.Gl.depth_size 24 : _ result);
    ignore (Sdl.gl_set_attribute Sdl.Gl.stencil_size 8 : _ result);
    match
      Sdl.create_window ~w:fw ~h:fh "SDL OpenGL"
        Sdl.Window.(opengl + allow_highdpi)
    with
    | Error (`Msg e) -> Sdl.log "Create window error: %s" e; exit 1
    | Ok w ->
      ignore (Sdl.gl_set_swap_interval (-1));
      let ow, oh = Sdl.gl_get_drawable_size w in
      Sdl.log "window size: %d,%d\topengl drawable size: %d,%d" fw fh ow oh;
      let sw = float ow /. float fw and sh = float oh /. float fh in
      (* GL3 initialization: *)
      ignore (Sdl.gl_set_attribute Sdl.Gl.stencil_size 1);
      match Sdl.gl_create_context w with
      | Error (`Msg e) -> Sdl.log "Create context error: %s" e; exit 1
      | Ok ctx ->
        let context = Renderer.create ~antialias:true ~stencil_strokes:true () in
        let quit = ref false in
        let event = Sdl.Event.create () in
        while not !quit do
          while Sdl.poll_event (Some event) do
            match Sdl.Event.enum (Sdl.Event.get event Sdl.Event.typ) with
            | `Quit -> quit := true
            | _ -> ()
          done;
          Gl.viewport 0 0 fw fh;
          Gl.clear_color 0.3 0.3 0.32 1.0;
          Gl.(clear (color_buffer_bit lor depth_buffer_bit lor stencil_buffer_bit));
          Gl.enable Gl.blend;
          Gl.blend_func_separate Gl.one Gl.src_alpha Gl.one Gl.one_minus_src_alpha;
          Gl.enable Gl.cull_face_enum;
          Gl.disable Gl.depth_test;
          render context sw sh (Int32.to_float (Sdl.get_ticks ()) /. 1000.0);
          Sdl.gl_swap_window w;
        done;
        Sdl.gl_delete_context ctx;
        Sdl.destroy_window w;
        Sdl.quit ();
        exit 0

let () = () (* lol i forget *)