open Tyxml.Html

let pp_ptime = Ptime.pp_human ()

let txtf fmt = Fmt.kstr txt fmt
let a_titlef fmt = Fmt.kstr a_title fmt

let check_icon result =
  match result with
  | Builder.Exited 0 ->
    span ~a:[
      a_style "color: green; cursor: pointer;";
      a_titlef "%a" Builder.pp_execution_result result;
    ]
      [txt "☑"]
  | _ ->
    span ~a:[
      a_style "color: red; cursor: pointer;";
      a_titlef "%a" Builder.pp_execution_result result;
    ]
      [txt "☒"]

type nav = [
  | `Default
  | `Job of string * string option
  | `Build of string * Builder_db.Build.t
  | `Comparison of (string * Builder_db.Build.t) * (string * Builder_db.Build.t)
]

let pp_platform = Fmt.(option ~none:(any "") (append (any "on ") string))
let pp_platform_query = Fmt.(option ~none:(any "") (append (any "?platform=") string))

let layout ?nav:(nav_=`Default) ~title:title_ body_ =
  let breadcrumb =
    let to_nav kvs =
      nav [ ul (List.map (fun (desc, href) ->
          li [a ~a:[a_href href] [desc]])
          kvs) ]
    in
    match nav_ with
    | `Default ->
      to_nav [txt "Home", "/"]
    | `Job (job_name, platform) ->
      to_nav [txt "Home", "/"; txtf "Job %s" job_name, Fmt.str "/job/%s/" job_name ; txtf "%a" pp_platform platform, Fmt.str "/job/%s/%a" job_name pp_platform_query platform ]
    | `Build (job_name, build) ->
      to_nav [
        txt "Home", "/";
        txtf "Job %s" job_name, Fmt.str "/job/%s/" job_name;
        txtf "%a" pp_platform (Some build.Builder_db.Build.platform), Fmt.str "/job/%s/%a" job_name pp_platform_query (Some build.Builder_db.Build.platform);
        txtf "Build %a" pp_ptime build.Builder_db.Build.start,
        Fmt.str "/job/%s/build/%a/" job_name Uuidm.pp build.Builder_db.Build.uuid;
      ]
    | `Comparison ((job_left, build_left), (job_right, build_right)) ->
      to_nav [
        txt "Home", "/";
        txtf "Comparison between %s@%a and %s@%a"
          job_left pp_ptime build_left.Builder_db.Build.start
          job_right pp_ptime build_right.Builder_db.Build.start,
        Fmt.str "/compare/%a/%a/" Uuidm.pp build_left.uuid Uuidm.pp build_right.uuid;
      ]
  in
  html
    (head (title (txt title_))
       [style ~a:[a_mime_type "text/css"]
          [
            txt "body {\
                 margin: 40px auto;\
                 line-height: 1.6;\
                 color: #444;\
                 padding: 0 10px;\
                 }";
            txt "nav ul {\
                 display: flex;\
                 list-style: none;\
                 }";
            Tyxml.Html.Unsafe.data
              "nav ul li::before {\
               content: \"→\";\
               }";
            Tyxml.Html.Unsafe.data
              "nav ul li:first-child::before {\
               content: \"\";\
               }";
            txt "nav a {\
                 padding: .5em 1em;\
                 }";
            txt "h1,h2,h3{line-height:1.2}";
            txt ".output-ts {\
                 white-space: nowrap;\
                 cursor: pointer;\
                 user-select: none;\
                 }";
            txt ".output-ts a {text-decoration: none;}";
            txt ".output-ts a:hover {text-decoration: underline;}";
            txt ".output-code {\
                 overflow: visible;\
                 white-space: pre;\
                 }";
            txt ".toggleable {\
                 display: none;\
                 }";
            txt ".toggleable-descr {\
                 cursor: pointer;\
                 text-decoration: underline;\
                 user-select: none;\
                 }";
            txt ":checked + .toggleable {\
                 display: block;\
                 }";
          ]])

    (body [
        breadcrumb;
        main body_
      ])

let toggleable ?(hidden=true) id description content =
  let checked = if hidden then [] else [a_checked ()] in
  div [
    label
      ~a:[
        a_label_for id;
        a_class ["toggleable-descr"];
      ]
      [txt description];
    input
      ~a:(checked @ [
          a_input_type `Checkbox;
          a_id id;
          a_style "display: none;";
        ]) ();
    div
      ~a:[
        a_class ["toggleable"]
      ]
      content;
  ]

let artifact ?(basename=false) job_name build { Builder_db.filepath; localpath = _; sha256; size } =
  [
    a ~a:[a_href (Fmt.str "/job/%s/build/%a/f/%a"
                    job_name
                    Uuidm.pp build.Builder_db.Build.uuid
                    Fpath.pp filepath)]
      [if basename
       then txt (Fpath.basename filepath)
       else txtf "%a" Fpath.pp filepath];
    txt " ";
    code [txtf "SHA256:%a" Hex.pp (Hex.of_cstruct sha256)];
    txtf " (%a)" Fmt.byte_size size;
  ]



let builder section_job_map =
  layout ~title:"Reproducible OPAM builds"
    ([ h1 [txt "Reproducible OPAM builds"];
       p [ txt "This website offers binary MirageOS unikernels and supplementary OS packages." ];
       p [ txt {|Following is a list of jobs that are built daily. A persistent link to the latest successful build is available as /job/*jobname*/build/latest/. All builds can be reproduced with |} ;
           a ~a:[a_href "https://github.com/roburio/orb/"] [txt "orb"];
           txt ". The builds are scheduled and executed by ";
           a ~a:[a_href "https://github.com/roburio/builder/"] [txt "builder"];
           txt ". The web interface is ";
           a ~a:[a_href "https://git.robur.io/robur/builder-web/"] [txt "builder-web"];
           txt ". Contact team@robur.coop if you have any questions or suggestions.";
       ];
       form ~a:[a_action "/hash"; a_method `Get]
         [
           label [
             txt "Search artifact by SHA256";
             br ();
             input ~a:[
               a_input_type `Search;
               a_id "sha256";
               a_name "sha256";
             ] ();
           ];
           input ~a:[
             a_input_type `Submit;
             a_value "Search";
           ] ();
         ];
       ] @
       Utils.String_map.fold (fun section jobs acc ->
         acc @ [
           h2 [ txt section ];
           ul (List.map (fun (job_name, synopsis, platform_builds) ->
               li ([
                   a ~a:[a_href ("job/" ^ job_name ^ "/")] [txt job_name];
                   br ();
                   txt (Option.value ~default:"" synopsis);
                   br ()
                   ] @
                   List.flatten
                     (List.map (fun (platform, latest_build, latest_artifact) ->
                       [
                         check_icon latest_build.Builder_db.Build.result;
                         txt " ";
                         a ~a:[Fmt.kstr a_href "job/%s/%a" job_name pp_platform_query (Some platform)][txt platform];
                         txt " ";
                         a ~a:[Fmt.kstr a_href "job/%s/build/%a/" job_name Uuidm.pp
                                         latest_build.Builder_db.Build.uuid]
                           [txtf "%a" (Ptime.pp_human ()) latest_build.Builder_db.Build.start];
                         txt " ";
                       ] @ (match latest_artifact with
                            | Some main_binary ->
                              artifact ~basename:true job_name latest_build main_binary
                            | None ->
                              [ txtf "Build failure: %a" Builder.pp_execution_result
                                  latest_build.Builder_db.Build.result ]
                       ) @ [ br () ])
                      platform_builds)
                ))
               jobs)
         ])
        section_job_map
        [])

let job name platform readme builds =
  layout ~nav:(`Job (name, platform)) ~title:(Fmt.str "Job %s %a" name pp_platform platform)
    ((h1 [txtf "Job %s %a" name pp_platform platform] ::
      (match readme with
       | None -> []
       | Some data ->
         [
           h2 ~a:[a_id "readme"] [txt "README"];
           a ~a:[a_href "#builds"] [txt "Skip to builds"];
           Unsafe.data Omd.(to_html (of_string data))
         ])) @
     [
      h2 ~a:[a_id "builds"] [txt "Builds"];
      a ~a:[a_href "#readme"] [txt "Back to readme"];
      ul (List.map (fun (build, main_binary) ->
          li ([
              check_icon build.Builder_db.Build.result;
              txtf " %s " build.platform;
              a ~a:[Fmt.kstr a_href "build/%a/" Uuidm.pp build.Builder_db.Build.uuid]
                [
                  txtf "%a" (Ptime.pp_human ()) build.Builder_db.Build.start;
                ];
              txt " ";
            ] @ match main_binary with
            | Some main_binary ->
              artifact ~basename:true name build main_binary
            | None ->
              [ txtf "Build failure: %a" Builder.pp_execution_result
                  build.Builder_db.Build.result ]))
          builds);

    ])

let job_build
  name
  readme
  ({ Builder_db.Build.uuid; start; finish; result; platform; _ } as build)
  artifacts
  same_input_same_output different_input_same_output same_input_different_output
  latest_uuid next_uuid previous_uuid
  =
  let delta = Ptime.diff finish start in
  layout ~nav:(`Build (name, build)) ~title:(Fmt.str "Job %s %a" name pp_ptime start)
    ((h1 [txtf "Job %s" name] ::
      (match readme with
       | None -> []
       | Some data ->
         [
           h2 ~a:[a_id "readme"] [txt "README"];
           a ~a:[a_href "#build"] [txt "Skip to build"];
           Unsafe.data Omd.(to_html (of_string data))
         ])) @
    [
      h2 ~a:[a_id "build"] [txtf "Build %a" pp_ptime start];
      a ~a:[a_href "#readme"] [txt "Back to readme"];
      p [txtf "Built on platform %s" platform ];
      p [txtf "Build took %a." Ptime.Span.pp delta ];
      p [txtf "Execution result: %a." Builder.pp_execution_result result];
      h3 [txt "Build info"];
      ul [
        li [ a ~a:[Fmt.kstr a_href "/job/%s/build/%a/console" name Uuidm.pp uuid]
               [txt "Console output"];
           ];
        li [ a ~a:[Fmt.kstr a_href "/job/%s/build/%a/script" name Uuidm.pp uuid]
               [txt "Build script"];
           ]
      ];
      h3 [txt "Build artifacts"];
      dl (List.concat_map
            (fun { Builder_db.filepath; localpath=_; sha256; size } ->
               let (`Hex sha256_hex) = Hex.of_cstruct sha256 in
               [
                 dt [a
                       ~a:[Fmt.kstr a_href "f/%a" Fpath.pp filepath]
                       [code [txtf "%a" Fpath.pp filepath]]];
                 dd [
                   code [txt "SHA256:"; txt sha256_hex];
                   txtf " (%a)" Fmt.byte_size size;
                 ];
               ])
            artifacts);
      h3 [ txtf "Reproduced by %d builds" (List.length (same_input_same_output @ different_input_same_output))] ;
      ul
        ((List.map (fun { Builder_db.Build.start ; uuid ; platform ; _ } ->
            li [
              txtf "on %s, same input, " platform;
              a ~a:[Fmt.kstr a_href "/job/%s/build/%a/" name Uuidm.pp uuid]
                  [txtf "%a" pp_ptime start]
            ])
            same_input_same_output) @
            List.map (fun { Builder_db.Build.start ; uuid = other_uuid ; platform ; _ } ->
              li [
                txtf "on %s, different input, " platform;
                a ~a:[Fmt.kstr a_href "/compare/%a/%a/"
                      Uuidm.pp other_uuid Uuidm.pp uuid]
                 [txtf "%a" pp_ptime start]
              ])
            different_input_same_output)
      ] @
      (if same_input_different_output = [] then
        []
      else
        [ h3 [txt "Same input, different output (not reproducible!)"];
          ul (
            List.map (fun { Builder_db.Build.start ; uuid = other_uuid ; platform ; _ } ->
              li [
                txtf "on %s, " platform ;
                a ~a:[Fmt.kstr a_href "/compare/%a/%a/" Uuidm.pp other_uuid Uuidm.pp uuid]
                  [txtf "%a" pp_ptime start]
              ])
              same_input_different_output)
          ]) @
       [ h3 [txt "Comparisons with other builds on the same platform"];
       let opt_build (ctx, uu) =
         match uu with
         | Some uu when not (Uuidm.equal uuid uu) ->
            [ li [ a ~a:[Fmt.kstr a_href "/compare/%a/%a/"
                      Uuidm.pp uu Uuidm.pp uuid]
                   [txtf "With %s build" ctx]]
            ]
          | _ -> []
        in
        ul
          (List.concat_map opt_build [ ("latest", latest_uuid) ; ("next", next_uuid) ; ("previous", previous_uuid) ])
    ])

let key_values xs =
  List.concat_map (fun (k, v) -> [ txtf "%s %s" k v ; br () ]) xs

let key_value_changes xs =
  List.concat_map (fun (k, v, v') -> [ txtf "%s %s->%s" k v v' ; br () ]) xs

let packages packages =
  OpamPackage.Set.elements packages
  |> List.concat_map (fun p -> [
        txtf "%a" Opamdiff.pp_opampackage p;
        br ();
      ])

let package_diffs diffs =
  List.concat_map (fun pd -> [
        txtf "%a" Opamdiff.pp_version_diff pd;
        br ();
      ])
    diffs

let opam_diffs diffs =
  List.concat_map (fun pd ->
        h4 [ txtf "%a" Opamdiff.pp_opam_diff pd ] ::
        (match pd.Opamdiff.build with None -> [] | Some a ->
          let l, r = Opamdiff.commands_to_strings a in
          [
            h5 [ txt "build instruction (without common prefix) modifications, old:" ] ;
            code (List.concat_map (fun s -> [ txt s ; br () ]) l) ;
            h5 [ txt "new" ] ;
            code (List.concat_map (fun s -> [ txt s ; br () ]) r)
          ]) @
        (match pd.Opamdiff.install with None -> [] | Some a ->
          let l, r = Opamdiff.commands_to_strings a in
          [
            h5 [ txt "install instruction (without common prefix) modifications, old:" ] ;
            code (List.concat_map (fun s -> [ txt s ; br () ]) l) ;
            h5 [ txt "new" ] ;
            code (List.concat_map (fun s -> [ txt s ; br () ]) r)
         ]) @
      (match pd.Opamdiff.url with None -> [] | Some a ->
          let l, r = Opamdiff.opt_url_to_string a in
          [
            h5 [ txt "URL" ] ;
            txtf "old: %s" l;
            br ();
            txtf "new: %s" r
          ]) @
      [ br () ])
    diffs

let compare_builds job_left job_right
    (build_left : Builder_db.Build.t) (build_right : Builder_db.Build.t)
    (added_env, removed_env, changed_env)
    (added_pkgs, removed_pkgs, changed_pkgs)
    (same, opam_diff, version_diff, left, right) =
  layout
    ~nav:(`Comparison ((job_left, build_left), (job_right, build_right)))
    ~title:(Fmt.str "Comparing builds %a and %a"
              Uuidm.pp build_left.uuid Uuidm.pp build_right.uuid)
    ([
      h1 [txt "Comparing builds"];
      h2 [
        txt "Builds ";
        a ~a:[a_href
               (Fmt.str "/job/%s/build/%a/"
                  job_left
                  Uuidm.pp build_left.uuid)]
          [txtf "%s@%a %a" job_left pp_ptime build_left.start pp_platform (Some build_left.platform)];
        txt " and ";
        a ~a:[a_href
               (Fmt.str "/job/%s/build/%a/"
                  job_right
                  Uuidm.pp build_right.uuid)]
          [txtf "%s@%a %a" job_right pp_ptime build_right.start pp_platform (Some build_right.platform)];
      ];
      h3 [ a ~a:[Fmt.kstr a_href "/compare/%a/%a/" Uuidm.pp build_right.uuid Uuidm.pp build_left.uuid]
           [txt "Compare in reverse direction"]] ;
      ul [
        li [
          a ~a:[a_href "#opam-packages-removed"]
            [txtf "%d opam packages removed" (OpamPackage.Set.cardinal left)]
        ];
        li [
          a ~a:[a_href "#opam-packages-installed"]
            [txtf "%d new opam packages installed" (OpamPackage.Set.cardinal right)]
        ];
        li [
          a ~a:[a_href "#opam-packages-version-diff"]
            [txtf "%d opam packages with version changes" (List.length version_diff)]
        ];
        li [
          a ~a:[a_href "#opam-packages-opam-diff"]
            [txtf "%d opam packages with changes in their opam file" (List.length opam_diff)]
        ];
        li [
          a ~a:[a_href "#opam-packages-unchanged"]
            [txtf "%d opam packages unchanged" (OpamPackage.Set.cardinal same)]
        ];
        li [
         a ~a:[a_href "#env-added"]
            [ txtf "%d environment variables added" (List.length added_env)]
        ];
        li [
         a ~a:[a_href "#env-removed"]
            [ txtf "%d environment variables removed" (List.length removed_env)]
        ];
        li [
         a ~a:[a_href "#env-changed"]
            [ txtf "%d environment variables changed" (List.length changed_env)]
        ];
        li [
         a ~a:[a_href "#pkgs-added"]
            [ txtf "%d system packages added" (List.length added_pkgs)]
        ];
        li [
         a ~a:[a_href "#pkgs-removed"]
            [ txtf "%d system packages removed" (List.length removed_pkgs)]
        ];
        li [
         a ~a:[a_href "#pkgs-changed"]
            [ txtf "%d system packages changed" (List.length changed_pkgs)]
        ];
      ];
      h3 ~a:[a_id "opam-packages-removed"]
        [txt "Opam packages removed"];
      code (packages left);
      h3 ~a:[a_id "opam-packages-installed"]
        [txt "New opam packages installed"];
      code (packages right);
      h3 ~a:[a_id "opam-packages-version-diff"]
        [txt "Opam packages with version changes"];
      code (package_diffs version_diff);
      h3 ~a:[a_id "opam-packages-opam-diff"]
        [txt "Opam packages with changes in their opam file"]] @
      opam_diffs opam_diff @ [
      h3 ~a:[a_id "opam-packages-unchanged"]
        [txt "Unchanged opam packages"];
      code (packages same);
      h3 ~a:[a_id "env-added"] [txt "Environment variables added"];
      code (key_values added_env);
      h3 ~a:[a_id "env-removed"] [txt "Environment variables removed"];
      code (key_values removed_env);
      h3 ~a:[a_id "env-changed"] [txt "Environment variables changed"];
      code (key_value_changes changed_env);
      h3 ~a:[a_id "pkgs-added"] [txt "System packages added"];
      code (key_values added_pkgs);
      h3 ~a:[a_id "pkgs-removed"] [txt "System packages removed"];
      code (key_values removed_pkgs);
      h3 ~a:[a_id "pkgs-changed"] [txt "System packages changed"];
      code (key_value_changes changed_pkgs);
    ])