syntax = "proto3";

package notes;

// ===============================
// Common classes used across types
// ===============================

message Color {
  float red   = 1;
  float green = 2;
  float blue  = 3;
  float alpha = 4;
}

message AttachmentInfo {
  optional string attachment_identifier = 1;  // preserve HasField
  optional string type_uti              = 2;  // preserve HasField
}

message Font {
  // Not used in presence checks, may remain non-optional
  string font_name  = 1;
  float  point_size = 2;
  int32  font_hints = 3;
}

// Observed highlight palette used by Apple Notes
enum Highlight {
  HIGHLIGHT_UNKNOWN = 0;
  HIGHLIGHT_PURPLE  = 1;
  HIGHLIGHT_PINK    = 2;
  HIGHLIGHT_ORANGE  = 3;
  HIGHLIGHT_MINT    = 4;
  HIGHLIGHT_BLUE    = 5;
}

enum StyleType {
  STYLE_TYPE_TITLE = 0;
  STYLE_TYPE_HEADING = 1;
  STYLE_TYPE_SUBHEADING = 2;
  STYLE_TYPE_MONOSPACED = 4;
  STYLE_TYPE_BULLET_LIST_ITEM = 100;
  STYLE_TYPE_DASHED_LIST_ITEM = 101;
  STYLE_TYPE_NUMBERED_LIST_ITEM = 102;
  STYLE_TYPE_CHECKLIST_ITEM = 103;
}

enum WritingDirection {
  WRITING_DIRECTION_DEFAULT = 0;
  WRITING_DIRECTION_LTR = 1;
  WRITING_DIRECTION_RTL = 2;
}

enum Alignment {
  ALIGNMENT_DEFAULT = 0;
  ALIGNMENT_CENTER = 1;
  ALIGNMENT_RIGHT = 2;
  ALIGNMENT_JUSTIFY = 3;
}

// Styles a "Paragraph" (any run of characters in an AttributeRun)
message ParagraphStyle {
  optional StyleType style_type                         = 1;  // was [default = -1] in proto2; use presence instead
  optional Alignment alignment                          = 2;
  optional WritingDirection writing_direction_paragraph = 3; // 1/3 LTR, 2/4 RTL (observed)
  optional int32 indent_amount                          = 4;
  optional Checklist checklist                          = 5;  // message presence works in proto3
  optional int32 starting_list_item_number              = 7; // for ordered lists
  optional int32 block_quote                            = 8;
  optional bytes paragraph_uuid                         = 9;

}


// Represents a checklist item
message Checklist {
  optional bytes uuid = 1;  // presence is checked in Python
  optional int32 done = 2;  // presence is checked in Python
}

// Represents an object that has pointers to a key and a value
message DictionaryElement {
  ObjectID key   = 1;
  ObjectID value = 2;
}

message Dictionary {
  repeated DictionaryElement element = 1;
}

// ObjectIDs are used to identify objects within the protobuf, offsets in an array, or a string.
message ObjectID {
  uint64 unsigned_integer_value = 2;
  string string_value           = 4;
  int32  object_index           = 6;
}

// Register Latest is used to identify the most recent version
message RegisterLatest {
  ObjectID contents = 2;
}

// MapEntries have a key that maps to a key-item array index and a value that points to an object.
message MapItem {
  int32   key   = 1;
  ObjectID value = 2;
}

enum FontWeight {
  FONT_WEIGHT_UNKNOWN = 0;
  FONT_WEIGHT_BOLD = 1;
  FONT_WEIGHT_ITALIC = 2;
  FONT_WEIGHT_BOLD_ITALIC = 3;
}

// A "run" of characters that need to be styled/displayed/etc
message AttributeRun {
  int32 length = 1;

  optional ParagraphStyle paragraph_style = 2;  // message presence

  // Inline styling
  optional Font font              = 3;           // message presence (not used today)
  optional FontWeight font_weight = 5;
  optional int32 underlined       = 6;
  optional int32 strikethrough    = 7;
  optional int32 superscript      = 8; // sign indicates super/sub
  optional string link            = 9;
  optional Color color            = 10;          // message presence
  optional WritingDirection writing_direction_selection   = 11;         // may also appear here
  optional AttachmentInfo attachment_info = 12; // message presence
  optional int32 timestamp = 13;
  optional int32 emphasis_style     = 14;
  optional Highlight highlight_color = 15;         // preferred highlight palette (when present)
}

// ===============================
// Overall Note protobufs
// ===============================

message NoteStoreProto {
  Document document = 2;
}

message Document {
  int32 version = 2;
  Note  note    = 3;
}

message Note {
  string note_text = 2;
  repeated AttributeRun attribute_run = 5;
}

// ===============================
// Embedded objects (mergeable data)
// ===============================

message MergableDataProto {
  MergableDataObject mergable_data_object = 2;
}

message MergableDataObject {
  int32 version = 2;
  MergeableDataObjectData mergeable_data_object_data = 3;
}

message MergeableDataObjectData {
  repeated MergeableDataObjectRow mergeable_data_object_entry = 3;
  repeated string mergeable_data_object_key_item  = 4;
  repeated string mergeable_data_object_type_item = 5;
  repeated bytes  mergeable_data_object_uuid_item = 6;
}

message MergeableDataObjectRow {
  RegisterLatest register_latest = 1;
  optional List list                       = 5;
  optional Dictionary dictionary           = 6;
  optional UnknownMergeableDataObjectEntryMessage unknown_message = 9;
  optional Note note                       = 10;
  optional MergeableDataObjectMap custom_map = 13;
  optional OrderedSet ordered_set          = 16;
}

message UnknownMergeableDataObjectEntryMessage {
  optional UnknownMergeableDataObjectEntryMessageEntry unknown_entry = 1;
}

message UnknownMergeableDataObjectEntryMessageEntry {
  optional int32 unknown_int1 = 1;
  optional int64 unknown_int2 = 2;
}

message MergeableDataObjectMap {
  int32 type = 1;
  repeated MapItem map_entry = 3;
}

message OrderedSet {
  OrderedSetOrdering ordering = 1;
  Dictionary elements         = 2;
}

message OrderedSetOrdering {
  OrderedSetOrderingArray array = 1;
  Dictionary contents           = 2;
}

message OrderedSetOrderingArray {
  Note contents = 1;
  repeated OrderedSetOrderingArrayAttachment attachment = 2;
}

message OrderedSetOrderingArrayAttachment {
  int32 index = 1;
  bytes uuid  = 2;
}

// List structures (not used yet by renderer, left structurally consistent)
message List {
  repeated ListItem list_entry = 1;
}

message ListItem {
  ObjectID id = 2;
  optional ListEntryDetails details            = 3;
  ListEntryDetails additional_details          = 4;
}

message ListEntryDetails {
  optional ListEntryDetailsKey list_entry_details_key = 1;
  optional ObjectID id = 2;
}

message ListEntryDetailsKey {
  int32 list_entry_details_type_index = 1;
  int32 list_entry_details_key        = 2;
}