{ config, pkgs, lib, ... }:

let

  makeConfig = accountName:
    ''
      unset reverse_name
      unset smime_is_default
      set my_account='${ accountName }'
      macro index,pager / "<vfolder-from-query>tag:${ accountName } "
      unalternates *
      set nm_record_tags = "+sent -inbox -unread +${ accountName }";
      set my_signature = ${ pkgs.writeText "signature.txt" config.accounts.email.accounts.${accountName}.signature.text }
      set status_format = "— [ %r ] $my_account %f (%lB) %>— %m messages%?n? [ %n new ]?%?d?  [ %d to delete ]?%?t?  [ %t tagged ]? —"
      source colors.neomuttrc
    '';

  makeAccount = accountName: {
    signature.showSignature = "append";
    smtp.tls.useStartTls = true;
    msmtp.enable = true;

    mbsync = {
      enable = true;
      create = "maildir";
      expunge = "both";
    };

    neomutt = {
      enable = true;
      sendMailCommand = "${lib.getExe pkgs.msmtp} -a ${ accountName }";
    };

    notmuch = {
      enable = true;
      neomutt = {
        virtualMailboxes = [ 
          { name = "Inbox"; query = "tag:${ accountName } and tag:inbox"; }
          { name = "Archive"; query = "tag:${ accountName } and not tag:sent and not tag:draft"; }
          { name = "Sent"; query = "tag:${ accountName } and tag:sent"; }
          { name = "Drafts"; query = "tag:${ accountName } and tag:draft"; }
          { name = "Spam"; query = "tag:${ accountName } and tag:spam"; }
          { name = "Trash"; query = "tag:${ accountName } and tag:trash"; }
        ];
      };
    };
  };

  mailcap_path = pkgs.writeText "neomutt_mailcap" ''
    application/pdf; zathura %s
    multipart; xdg-open %s
    text/html; firefox %s; description=HTML Text; nametemplate=%s.html; needsterminal
    text/html; w3m -v -F -T text/html -dump %s; copiousoutput
    text/calendar; khal import %s
    text; neomutt %s
    application; xdg-open %s
    image; xdg-open %s
    video; xdg-open %s
    audio; xdg-open %s
    message; xdg-open %s
    model; xdg-open %s
  '';

in

{
  programs.mu.enable = true;

  accounts.email = {
    maildirBasePath = "${config.xdg.dataHome}/mail";
    accounts = {
      gu = { name, ... }: lib.attrsets.recursiveUpdate (makeAccount name) {
        primary = true;
        address = "straube@geo.uni-frankfurt.de";
        realName = "Till Straube";
        imap.host = "imap.server.uni-frankfurt.de";
        smtp.host = "smtpauth.rz.uni-frankfurt.de";
        userName = "tstraube";
        passwordCommand = "pass uni/hrz";
        signature = {
          text = ''
            Dr. Till Straube (he/him)
            Dept. of Human Geography
            Goethe University Frankfurt
          '';
        };
        neomutt = {
          extraConfig = makeConfig name + ''
            color status blue default
            color index blue default '~N'
            alternates ^tstraube@(em|rz)?.uni-frankfurt.de$
            set smime_is_default
          '';
        };
      };

      t9e = { name, ... }: lib.attrsets.recursiveUpdate (makeAccount name) {
        address = "till.straube@t9e.me";
        realName = "Till Straube";
        imap.host = "arielle.ktiu.net";
        smtp.host = "arielle.ktiu.net";
        userName = "till.straube@t9e.me";
        signature.text = ''
          Till Straube (he/him)
          PGP key: https://keys.openpgp.org/search?q=till.straube@t9e.me
        '';
        neomutt = {
          extraConfig = makeConfig name + ''
            color status green default
            color index green default '~N'
            alternates @t9e.me$ @ktiu.net$ ^(tillkowski|till.straube)@gmail.com$
            set reverse_name
          '';
        };
        msmtp.extraConfig.port = "587";
        passwordCommand = "pass accounts/ktiu-imap";
      };

      ksh = { name, ... }: lib.attrsets.recursiveUpdate (makeAccount name) {
        address = "kein_schlussstrich_hessen@systemli.org";
        realName = "Kein Schlussstrich Hessen";
        imap.host = "mail.systemli.org";
        smtp.host = "mail.systemli.org";
        userName = "kein_schlussstrich_hessen@systemli.org";
        signature.text = ''
          Kein Schlussstrich Hessen
          PGP Key: https://keys.openpgp.org/search?q=kein_schlussstrich_hessen@systemli.org
        '';
        neomutt = {
          extraConfig = makeConfig name + ''
            color status red default
            color index red default '~N'
          '';
        };
        passwordCommand = "pass ksh/systemli";
      };
    };
  };

  programs.msmtp.enable = true;

  programs.mbsync.enable = true;

  programs.notmuch = {
    enable = true;
    search.excludeTags = [ "trash" "spam" ];
    new.tags = [ "new" "unread" ];
    hooks = {
      preNew = ''
        notmuch tag +draft -- 'folder:"/\/Drafts$/"'
        mbsync --all
      '';
      postNew = ''
        notmuch tag +gu -- tag:new path:gu/**
        notmuch tag +t9e -- tag:new path:t9e/**
        notmuch tag +ksh -- tag:new path:ksh/**
        notmuch tag +inbox -- tag:new 'folder:"/\/Inbox$/"'
        notmuch tag +sent -unread -- tag:new 'folder:"/\/Sent$/"'
        notmuch tag +trash -unread -- tag:new 'folder:"/\/Trash$/"'
        notmuch tag +draft -unread -- tag:new 'folder:"/\/Drafts$/"'
        notmuch tag +spam -- tag:new 'folder:"/\/Spam$/"'
        notmuch tag +spam -- tag:new 'folder:"/\/Junk$/"'
        notmuch tag -new -- tag:new
      '';
    };
  };

  programs.neomutt = {
    enable = true;

    vimKeys = true;
    changeFolderWhenSourcingAccount = true;
    editor = "nvim -c 'call woof#init#Init()'";
    sort = "reverse-date-received";
    unmailboxes = true;

    settings = {
      abort_noattach = "ask-yes";
      abort_noattach_regex = "\"(attach|enclosed|anbei|anhängen|angehängt|anhang|anhänge|hängt an)\"";
      auto_edit = "no";
      beep = "no";
      confirm_append = "no";
      crypt_auto_sign = "yes";
      crypt_replyencrypt = "yes";
      crypt_replysign = "yes";
      crypt_replysignencrypted = "yes";
      crypt_verify_sig = "yes";
      edit_headers = "yes";
      forward_attachments = "yes";
      forward_format = "\"Fwd: %s\"";
      forward_quote = "yes";
      help = "no";
      include = "yes";
      mail_check_stats = "yes";
      mailcap_path = "${ mailcap_path }";
      mark_old = "no";
      markers = "no";
      mbox_type = "Maildir";
      menu_scroll = "yes";
      mime_type_query_command = "\"file -b --mime-type %s\"";
      nm_record = "yes";
      pager_context = "3";
      pager_index_lines = "5";
      pager_stop = "yes";
      query_command= "\"khard email --parsable '%s'\"";
      recall = "no";
      resume_draft_files = "yes";
      reverse_real_name = "no";
      shell = "/bin/sh";
      sleep_time = "0";
      smart_wrap = "yes";
      status_chars = "✔↻٪A";
      tilde = "yes";
      use_envelope_from = "yes";
      virtual_spool_file = "yes";
      wait_key = "no";
    };

    binds = [ 
      { key = "m"; map = [ "index" "pager" ]; action = "noop"; }
      { key = "k"; map = [ "pager" ]; action = "previous-entry"; }
      { key = "j"; map = [ "pager" ]; action = "next-entry"; }
      { key = "<return>"; map = [ "index" ]; action = "display-message"; }
      { key = "<space>"; map = [ "index" ]; action = "entire-thread"; }
      { key = "gf"; map = [ "index" "pager" ]; action = "change-folder"; }
      { key = "<Tab>"; map = [ "editor" ]; action = "complete-query"; }
      { key = "P"; map = [ "compose" ]; action = "pgp-menu"; }
      { key = "p"; map = [ "compose" ]; action = "postpone-message"; }
    ];

    macros = [
      { key = "gu"; map = [ "index" "pager" ]; action = "<vfolder-from-query>tag:dummy<enter>:source ${config.xdg.configHome}/neomutt/gu<enter>g!"; }
      { key = "gm"; map = [ "index" "pager" ]; action = "<vfolder-from-query>tag:dummy<enter>:source ${config.xdg.configHome}/neomutt/t9e<enter>g!"; }
      { key = "gk"; map = [ "index" "pager" ]; action = "<vfolder-from-query>tag:dummy<enter>:source ${config.xdg.configHome}/neomutt/ksh<enter>g!"; }

      { key = "Y"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>"; }
      { key = "y"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>-inbox -unread -spam -trash<enter><sync-mailbox>"; }
      { key = "J"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>+spam -inbox -unread -trash<enter><sync-mailbox>"; }
      { key = "I"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>+inbox -old -spam -trash<enter><sync-mailbox>"; }
      { key = "Y"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>"; }
      { key = "dd"; map = [ "index" "pager" ]; action = "<modify-labels-then-hide>+trash -inbox -unread -spam<enter><sync-mailbox>"; }

      { key = "g!"; map = [ "index" "pager" ]; action = "<change-vfolder>Inbox<enter>"; }
      { key = "g<"; map = [ "index" "pager" ]; action = "<change-vfolder>Sent<enter>"; }
      { key = "g>"; map = [ "index" "pager" ]; action = "<change-vfolder>Archive<enter>"; }
      { key = "gj"; map = [ "index" "pager" ]; action = "<change-vfolder>Spam<enter>"; }
      { key = "gd"; map = [ "index" "pager" ]; action = "<change-vfolder>Drafts<enter>"; }
      { key = "gt"; map = [ "index" "pager" ]; action = "<change-vfolder>Trash<enter>"; }

      { key = "go"; map = [ "index" "pager" ]; action = "<shell-escape>notmuch new<enter>"; }
      { key = "V"; map = ["index" "pager"]; action = "<view-attachments><search>html<enter><view-mailcap><exit>"; }
      { key = "mar"; map = [ "index" "pager" ]; action = "<tag-pattern>new<enter><tag-prefix-cond><clear-flag>n<enter><tag-prefix-cond><clear-flag>*<enter>"; }
      { key = "A"; map = [ "index" "pager" ]; action = "<pipe-message>khard add-email --vcard-version=4.0<return>"; }
      { key = "S"; map = [ "index" "pager" ]; action = "<pipe-message>ripmime -i - -d ~/tmp && rm ~/tmp/textfile*"; }
      { key = "gb"; map = [ "index" "pager" ]; action = "<pipe-message>urlscan<enter>"; }
      { key = "I"; map = [ "compose" ]; action = "<attach-file>`tmpfile=$(mktemp -u --suffix .png -t XXXXXXXXXXXX -p ~/tmp) && wl-paste -t image/png > \"$tmpfile\" && echo \"$tmpfile\"`<enter>"; }
      { key = "p"; map = [ "compose" ]; action = "<postpone-message>"; }

      { key = "c"; map = [ "index" "pager" ]; action = "<enter-command>set signature=$my_signature<enter><mail>"; }
      { key = "r"; map = [ "index" "pager" ]; action = "<enter-command>unset signature<enter><reply>"; }
      { key = "a"; map = [ "index" "pager" ]; action = "<enter-command>unset signature<enter><group-reply>"; }
      { key = "f"; map = [ "index" "pager" ]; action = "<enter-command>unset signature<enter><forward-message>"; }
      { key = "l"; map = [ "index" "pager" ]; action = "<enter-command>unset signature<enter><list-reply>"; }
    ];

    extraConfig = builtins.readFile ../../dotfiles/neomutt/config.neomuttrc;
  };

  xdg.configFile."neomutt/colors.neomuttrc".source = config.lib.file.mkOutOfStoreSymlink "/etc/nixos/dotfiles/neomutt/colors.neomuttrc";
  xdg.configFile."neomutt/bindings.neomuttrc".source = config.lib.file.mkOutOfStoreSymlink "/etc/nixos/dotfiles/neomutt/bindings.neomuttrc";
  programs.neovim.plugins = with pkgs.vimPlugins; [
    {
      plugin = vim-pathogen; 
      type = "viml";
      config = "execute pathogen#infect()";
    }
  ];

  xdg.configFile."nvim/bundle/woof-vim" = {
    source = config.lib.file.mkOutOfStoreSymlink "/home/till/devel/woof-vim";
    recursive = true;
  };

}