/*
 * Copyright (C) 2011 Alexander Larsson <alexl@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

using Gtk;
using Folks;
using Gee;

/**
 * The contact sheet displays the actual information of a contact.
 *
 * (Note: to edit a contact, use the {@link ContactEditor} instead.
 */
public class Contacts.ContactSheet : Grid {
  private int last_row = 0;
  private Individual individual;
  public bool narrow { get; set; default = true; }

  private const string[] SORTED_PROPERTIES = {
    "email-addresses",
    "phone-numbers",
    "im-addresses",
    "urls",
    "nickname",
    "birthday",
    "postal-addresses",
    "notes"
  };

  public ContactSheet (Individual individual, Store store) {
    Object (row_spacing: 12, column_spacing: 12);
    this.individual = individual;

    this.individual.notify.connect (update);
    this.individual.personas_changed.connect (update);
    store.quiescent.connect (update);

    update ();
  }

  private Label create_persona_store_label (Persona p) {
    var store_name = new Label (Utils.format_persona_store_name_for_contact (p));
    var attrList = new Pango.AttrList ();
    attrList.insert (Pango.attr_weight_new (Pango.Weight.BOLD));
    store_name.set_attributes (attrList);
    store_name.set_halign (Align.START);
    store_name.set_ellipsize (Pango.EllipsizeMode.MIDDLE);

    return store_name;
  }

  private Button create_button (string icon) {
    var button = new Button.from_icon_name (icon, IconSize.BUTTON);
    button.set_halign (Align.END);
    button.get_style_context ().add_class ("flatten");

    return button;
  }

  void add_row_with_label (string label_value, string value, Widget? btn1 = null, Widget? btn2 =null) {
    if (value == "" || value == null)
      return;
    var type_label = new Label (label_value);
    type_label.xalign = 1.0f;
    type_label.set_halign (Align.END);
    type_label.set_valign (Align.CENTER);
    type_label.get_style_context ().add_class ("dim-label");
    this.attach (type_label, 0, this.last_row, 1, 1);

    var value_label = new Label (value);
    value_label.set_line_wrap (true);
    value_label.xalign = 0.0f;
    value_label.set_halign (Align.START);
    value_label.set_ellipsize (Pango.EllipsizeMode.END);
    value_label.wrap_mode = Pango.WrapMode.CHAR;
    value_label.set_selectable (true);

    if (btn1 != null || btn2 !=null) {
      var value_box = new Box(Orientation.HORIZONTAL, 12);
      value_box.pack_start(value_label, false, false, 0);

      if (btn1 != null)
        value_box.pack_end(btn1, false, false, 0);
      if (btn2 != null)
        value_box.pack_end(btn2, false, false, 0);
      this.attach (value_box, 1, this.last_row, 1, 1);
    } else {
      this.attach (value_label, 1, this.last_row, 1, 1);
    }
    this.last_row++;
  }

  private void update () {
    this.last_row = 0;
    this.foreach ((child) => this.remove (child));

    var image_frame = new Avatar (PROFILE_SIZE, this.individual);
    image_frame.set_vexpand (false);
    image_frame.set_valign (Align.START);

    this.attach (image_frame,  0, 0, 1, 3);

    create_name_label ();

    this.last_row += 3; // Name/Avatar takes up 3 rows

    var personas = Utils.get_personas_for_display (this.individual);
    /* Cause personas are sorted properly I can do this */
    foreach (var p in personas) {
      bool is_first_persona = (this.last_row == 3);
      int persona_store_pos = this.last_row;
      if (!is_first_persona) {
        this.attach (create_persona_store_label (p), 0, this.last_row, 3);
        this.last_row++;
      }

      foreach (var prop in SORTED_PROPERTIES)
        add_row_for_property (p, prop);

      // Nothing to show in the persona: don't mention it
      bool is_empty_persona = (this.last_row == persona_store_pos + 1);
      if (!is_first_persona && is_empty_persona) {
        this.remove_row (persona_store_pos);
        this.last_row--;
      }
    }

    show_all ();
  }

  private void update_name_label (Gtk.Label name_label) {
    var name = Markup.printf_escaped ("<span font='16'>%s</span>",
                                      this.individual.display_name);
    name_label.set_markup (name);
  }

  private void create_name_label () {
    var name_label = new Label ("");
    name_label.ellipsize = Pango.EllipsizeMode.END;
    name_label.xalign = 0f;
    name_label.selectable = true;
    this.attach (name_label,  1, 0, 1, 3);
    update_name_label (name_label);
    this.individual.notify["display-name"].connect ((obj, spec) => {
      update_name_label (name_label);
    });
  }

  private void add_row_for_property (Persona persona, string property) {
    switch (property) {
      case "email-addresses":
        add_emails (persona);
        break;
      case "phone-numbers":
        add_phone_nrs (persona);
        break;
      case "im-addresses":
        add_im_addresses (persona);
        break;
      case "urls":
        add_urls (persona);
        break;
      case "nickname":
        add_nickname (persona);
        break;
      case "birthday":
        add_birthday (persona);
        break;
      case "notes":
        add_notes (persona);
        break;
      case "postal-addresses":
        add_postal_addresses (persona);
        break;
      default:
        debug ("Unsupported property: %s", property);
        break;
    }
  }

  private void add_emails (Persona persona) {
    var details = persona as EmailDetails;
    if (details != null) {
      var emails = Utils.sort_fields<EmailFieldDetails>(details.email_addresses);
      foreach (var email in emails) {
        var button = create_button ("mail-unread-symbolic");
        button.clicked.connect (() => {
          Utils.compose_mail ("%s <%s>".printf(this.individual.display_name, email.value));
        });
        add_row_with_label (TypeSet.email.format_type (email), email.value, button);
      }
    }
  }

  private void add_phone_nrs (Persona persona) {
    var phone_details = persona as PhoneDetails;
    if (phone_details != null) {
      var phones = Utils.sort_fields<PhoneFieldDetails>(phone_details.phone_numbers);
      foreach (var phone in phones) {
#if HAVE_TELEPATHY
        if (this.store.caller_account != null) {
          var call_button = create_button ("call-start-symbolic");
          call_button.clicked.connect (() => {
            Utils.start_call (phone.value, this.store.caller_account);
          });

          add_row_with_label (TypeSet.phone.format_type (phone), phone.value, call_button);
        } else {
          add_row_with_label (TypeSet.phone.format_type (phone), phone.value);
        }
#else
        add_row_with_label (TypeSet.phone.format_type (phone), phone.value);
#endif
      }
    }
  }

  private void add_im_addresses (Persona persona) {
#if HAVE_TELEPATHY
    var im_details = persona as ImDetails;
    if (im_details != null) {
      foreach (var protocol in im_details.im_addresses.get_keys ()) {
        foreach (var id in im_details.im_addresses[protocol]) {
          if (persona is Tpf.Persona) {
            var button = create_button ("user-available-symbolic");
            button.clicked.connect (() => {
              var im_persona = Utils.find_im_persona (individual, protocol, id.value);
              if (im_persona != null) {
                var type = im_persona.presence_type;
                if (type != PresenceType.UNSET && type != PresenceType.ERROR &&
                    type != PresenceType.OFFLINE && type != PresenceType.UNKNOWN) {
                  Utils.start_chat (this.contact, protocol, id.value);
                }
              }
            });
            add_row_with_label (ImService.get_display_name (protocol), id.value, button);
          }
        }
      }
    }
#endif
  }

  private void add_urls (Persona persona) {
    var url_details = persona as UrlDetails;
    if (url_details != null) {
      foreach (var url in url_details.urls) {
        var button = create_button ("web-browser-symbolic");
        button.clicked.connect (() => {
          var window = (Window) button.get_toplevel ();
          try {
            show_uri_on_window (window, fallback_to_https (url.value), Gdk.CURRENT_TIME);
          } catch (Error e) {
            var message = "Failed to open url '%s'".printf(url.value);

            // Notify the user
            var notification = new InAppNotification (message);
            notification.show ();
            window.add_notification (notification);

            // Print details on stdout
            debug (message + ": " + e.message);
          }
        });
        add_row_with_label (_("Website"), url.value, button);
      }
    }
  }

  // When the url doesn't contain a scheme we fallback to http
  // We are sure that the url is a webaddress but GTK falls back to opening a file
  private string fallback_to_https (string url) {
    string scheme = Uri.parse_scheme (url);
    if (scheme == null)
      return "https://" + url;
    return url;
  }

  private void add_nickname (Persona persona) {
    var name_details = persona as NameDetails;
    if (name_details != null && is_set (name_details.nickname))
      add_row_with_label (_("Nickname"), name_details.nickname);
  }

  private void add_birthday (Persona persona) {
    var birthday_details = persona as BirthdayDetails;
    if (birthday_details != null && birthday_details.birthday != null)
      add_row_with_label (_("Birthday"), birthday_details.birthday.to_local ().format ("%x"));
  }

  private void add_notes (Persona persona) {
    var note_details = persona as NoteDetails;
    if (note_details != null) {
      foreach (var note in note_details.notes)
        add_row_with_label (_("Note"), note.value);
    }
  }

  private void add_postal_addresses (Persona persona) {
    var addr_details = persona as PostalAddressDetails;
    if (addr_details != null) {
      foreach (var addr in addr_details.postal_addresses) {
        var all_strs = string.joinv ("\n", Utils.format_address (addr.value));
        add_row_with_label (TypeSet.general.format_type (addr), all_strs);
      }
    }
  }
}
