syntax = "proto3";

package memos.store;

import "google/type/color.proto";

option go_package = "gen/store";

enum InstanceSettingKey {
  INSTANCE_SETTING_KEY_UNSPECIFIED = 0;
  // BASIC is the key for basic settings.
  BASIC = 1;
  // GENERAL is the key for general settings.
  GENERAL = 2;
  // STORAGE is the key for storage settings.
  STORAGE = 3;
  // MEMO_RELATED is the key for memo related settings.
  MEMO_RELATED = 4;
  // TAGS is the key for tag metadata.
  TAGS = 5;
  // NOTIFICATION is the key for notification transport settings.
  NOTIFICATION = 6;
  // AI is the key for AI provider settings.
  AI = 7;
}

message InstanceSetting {
  InstanceSettingKey key = 1;
  oneof value {
    InstanceBasicSetting basic_setting = 2;
    InstanceGeneralSetting general_setting = 3;
    InstanceStorageSetting storage_setting = 4;
    InstanceMemoRelatedSetting memo_related_setting = 5;
    InstanceTagsSetting tags_setting = 6;
    InstanceNotificationSetting notification_setting = 7;
    InstanceAISetting ai_setting = 8;
  }
}

message InstanceBasicSetting {
  // The secret key for instance. Mainly used for session management.
  string secret_key = 1;
  // The current schema version of database.
  string schema_version = 2;
}

message InstanceGeneralSetting {
  // disallow_user_registration disallows user registration.
  bool disallow_user_registration = 2;
  // disallow_password_auth disallows password authentication.
  bool disallow_password_auth = 3;
  // additional_script is the additional script.
  string additional_script = 4;
  // additional_style is the additional style.
  string additional_style = 5;
  // custom_profile is the custom profile.
  InstanceCustomProfile custom_profile = 6;
  // week_start_day_offset is the week start day offset from Sunday.
  // 0: Sunday, 1: Monday, 2: Tuesday, 3: Wednesday, 4: Thursday, 5: Friday, 6: Saturday
  // Default is Sunday.
  int32 week_start_day_offset = 7;
  // disallow_change_username disallows changing username.
  bool disallow_change_username = 8;
  // disallow_change_nickname disallows changing nickname.
  bool disallow_change_nickname = 9;
}

message InstanceCustomProfile {
  string title = 1;
  string description = 2;
  string logo_url = 3;
}

message InstanceStorageSetting {
  enum StorageType {
    STORAGE_TYPE_UNSPECIFIED = 0;
    // STORAGE_TYPE_DATABASE is the database storage type.
    DATABASE = 1;
    // STORAGE_TYPE_LOCAL is the local storage type.
    LOCAL = 2;
    // STORAGE_TYPE_S3 is the S3 storage type.
    S3 = 3;
  }
  // storage_type is the storage type.
  StorageType storage_type = 1;
  // The template of file path.
  // e.g. assets/{timestamp}_{filename}
  string filepath_template = 2;
  // The max upload size in megabytes.
  int64 upload_size_limit_mb = 3;
  // The S3 config.
  StorageS3Config s3_config = 4;
}

// Reference: https://developers.cloudflare.com/r2/examples/aws/aws-sdk-go/
message StorageS3Config {
  string access_key_id = 1;
  string access_key_secret = 2;
  string endpoint = 3;
  string region = 4;
  string bucket = 5;
  bool use_path_style = 6;
}

message InstanceMemoRelatedSetting {
  reserved 2;
  reserved "display_with_update_time";
  // content_length_limit is the limit of content length. Unit is byte.
  int32 content_length_limit = 3;
  // enable_double_click_edit enables editing on double click.
  bool enable_double_click_edit = 4;
  // reactions is the list of reactions.
  repeated string reactions = 7;
}

message InstanceTagMetadata {
  // Optional background color for the tag label.
  // When unset, the default tag color is used.
  google.type.Color background_color = 1;
  // Whether memos with this tag should have their content blurred.
  bool blur_content = 2;
}

message InstanceTagsSetting {
  // Map of tag name pattern to tag metadata.
  // Each key is treated as an anchored regular expression (^pattern$),
  // so a single entry like "project/.*" matches all tags under that prefix.
  // Exact tag names are also valid (they are trivially valid regex patterns).
  map<string, InstanceTagMetadata> tags = 1;
}

message InstanceNotificationSetting {
  EmailSetting email = 1;

  message EmailSetting {
    bool enabled = 1;
    string smtp_host = 2;
    int32 smtp_port = 3;
    string smtp_username = 4;
    string smtp_password = 5;
    string from_email = 6;
    string from_name = 7;
    string reply_to = 8;
    bool use_tls = 9;
    bool use_ssl = 10;
  }
}

message InstanceAISetting {
  // providers is the list of AI provider configurations available instance-wide.
  repeated AIProviderConfig providers = 1;

  // transcription is the speech-to-text feature configuration.
  // When unset or transcription.provider_id is empty, transcription is disabled.
  TranscriptionConfig transcription = 2;
}

message AIProviderConfig {
  string id = 1;
  string title = 2;
  AIProviderType type = 3;
  string endpoint = 4;
  // api_key is write-only at the API layer and is required by the server to call providers.
  string api_key = 5;
}

enum AIProviderType {
  AI_PROVIDER_TYPE_UNSPECIFIED = 0;
  OPENAI = 1;
  GEMINI = 2;
}

// TranscriptionConfig configures the speech-to-text feature.
message TranscriptionConfig {
  // provider_id references an entry in InstanceAISetting.providers[].id.
  // Empty string means transcription is disabled.
  string provider_id = 1;

  // model is the provider-specific model identifier.
  // Empty string falls back to the engine default.
  // OPENAI examples:
  //   - whisper-1 (legacy, lower cost)
  //   - gpt-4o-transcribe, gpt-4o-mini-transcribe (higher quality)
  //   - gpt-4o-transcribe-diarize (includes speaker labels)
  // GEMINI examples:
  //   - gemini-2.5-flash (default, multimodal call)
  //   - gemini-2.5-pro
  string model = 2;

  // language is the default ISO 639-1 language hint sent to the provider.
  // Empty string lets the provider auto-detect.
  string language = 3;

  // prompt is a default spelling/vocabulary hint passed to the provider.
  // Used as the OpenAI Whisper "prompt" parameter (a soft hint that the model
  // may ignore) and folded into the Gemini generation prompt as a "Context and
  // spelling hints" block (which the LLM will treat more literally).
  string prompt = 4;
}