// common/proto/tables_data.proto
syntax = "proto3";
package komp_ac.tables_data;

import "common.proto";
import "exchange_rates.proto";
import "google/protobuf/struct.proto";

// Read and write row data for user-defined tables inside profiles (schemas).
// Operations are performed against the physical PostgreSQL table that
// corresponds to the logical table definition and are scoped by profile
// (schema). Deletions are soft (set deleted = true). Typed binding and
// script-based validation are enforced consistently.
service TablesData {
  // Insert a new row into a table with strict type binding and script validation.
  //
  // Behavior:
  // - Validates that profile (schema) exists and table is defined for it
  // - Validates provided columns exist (user-defined or allowed system/FK columns)
  // - For columns targeted by scripts in this table, the client MUST provide the
  //   value, and it MUST equal the script’s calculated value (compared type-safely)
  // - Binds values with correct SQL types, rejects invalid formats/ranges
  // - Inserts the row and returns the new id; queues search indexing (best effort)
  // - If the physical table is missing but the definition exists, returns INTERNAL
  rpc PostTableData(PostTableDataRequest) returns (PostTableDataResponse);

  // Insert an ACCOUNTING-enabled source row with an explicit exchange-rate
  // treatment for the journal line created from it.
  rpc PostAccountingTableData(PostAccountingTableDataRequest)
      returns (PostTableDataResponse);

  // Starts a durable, profile-scoped import staging session. Staging never changes
  // profile data; CommitTableDataImport applies every staged chunk atomically.
  rpc BeginTableDataImport(BeginTableDataImportRequest)
      returns (BeginTableDataImportResponse);

  // Adds one table chunk to an import session. Rows retain chunk and table order.
  rpc StageTableDataImport(StageTableDataImportRequest)
      returns (StageTableDataImportResponse);

  // Applies every staged row through the ordinary validated insert machinery in
  // one PostgreSQL transaction. Any failure rolls back every imported side effect.
  rpc CommitTableDataImport(CommitTableDataImportRequest)
      returns (CommitTableDataImportResponse);

  // Discards a staged import. Already committed imports cannot be aborted.
  rpc AbortTableDataImport(AbortTableDataImportRequest)
      returns (AbortTableDataImportResponse);

  // Update existing row data with strict type binding and script validation.
  //
  // Behavior:
  // - Validates profile and table, and that the record exists
  // - If request data is empty, returns success without changing the row
  // - For columns targeted by scripts:
  //    • If included in update, provided value must equal the script result
  //    • If not included, update must not cause the script result to differ
  //      from the current stored value; otherwise FAILED_PRECONDITION is returned
  // - Binds values with correct SQL types; rejects invalid formats/ranges
  // - Updates the row and returns the id; queues search indexing (best effort)
  rpc PutTableData(PutTableDataRequest) returns (PutTableDataResponse);
  rpc PutAccountingTableData(PutAccountingTableDataRequest)
      returns (PutTableDataResponse);

  // Performs a PUT after the user explicitly accepted changing a referenced version.
  rpc PutTableDataConfirmed(PutTableDataConfirmedRequest) returns (PutTableDataResponse);

  // Lists profiles whose rows currently point at this row version.
  rpc GetTableUpdateImpact(TableUpdateImpactRequest) returns (TableUpdateImpactResponse);

  // Snapshots the current version of a row and advances its version.
  // Existing references remain immutable; new references use the new version.
  rpc ArchiveTableData(ArchiveTableDataRequest) returns (ArchiveTableDataResponse);

  // Soft-delete a single record (sets deleted = true) if it exists and is not already deleted.
  //
  // Behavior:
  // - Validates profile and table definition
  // - Updates only rows with deleted = false
  // - success = true means a row was actually changed; false means nothing to delete
  // - If the physical table is missing but the definition exists, returns INTERNAL
  rpc DeleteTableData(DeleteTableDataRequest) returns (DeleteTableDataResponse);

  // Fetch a single non-deleted row by id as textified values.
  //
  // Behavior:
  // - Validates profile and table definition
  // - Returns all columns as strings (COALESCE(col::TEXT, '') AS col)
  //   including: id, deleted, row_revision, all user-defined columns, and FK columns
  //   named by whoever declared each link, plus "account" on
  //   ACCOUNTING-enabled tables
  // - Fails with NOT_FOUND if record does not exist or is soft-deleted
  // - If the physical table is missing but the definition exists, returns INTERNAL
  rpc GetTableData(GetTableDataRequest) returns (GetTableDataResponse);

  // Fetches one exact version of a row.
  rpc GetTableDataVersion(GetTableDataVersionRequest) returns (GetTableDataResponse);

  // Count non-deleted rows in a table.
  //
  // Behavior:
  // - Validates profile and table definition
  // - Returns komp_ac.common.CountResponse.count with rows where deleted = FALSE
  // - If the physical table is missing but the definition exists, returns INTERNAL
  rpc GetTableDataCount(GetTableDataCountRequest) returns (komp_ac.common.CountResponse);

  // Fetch the last non-deleted row by id. This is the efficient form-opening
  // path and does not scan the table through OFFSET or COUNT(*).
  rpc GetLastTableData(GetLastTableDataRequest) returns (GetLastTableDataResponse);

  // Fetch the nearest visible row before or after an existing row id. This is
  // the ordinary form-navigation path and skips deleted/id-gap rows.
  rpc GetAdjacentTableData(GetAdjacentTableDataRequest)
      returns (GetAdjacentTableDataResponse);

  // Fetch the N-th non-deleted row by id order (1-based), then return its full data.
  //
  // Behavior:
  // - position is 1-based (position = 1 → first row by id ASC with deleted = FALSE)
  // - Returns NOT_FOUND if position is out of bounds
  // - Otherwise identical to GetTableData for the selected id
  rpc GetTableDataByPosition(GetTableDataByPositionRequest) returns (GetTableDataResponse);
}

// Insert a new row.
message PostTableDataRequest {
  // Required. Profile (PostgreSQL schema) name that owns the table.
  // Must exist in the schemas table.
  string profile_name = 1;

  // Required. Logical table (definition) name within the profile.
  // Must exist in table_definitions for the given profile.
  string table_name = 2;

  // Required. Key-value data for columns to insert.
  //
  // Allowed keys:
  // - User-defined columns from the table definition
  // - System/FK columns:
  //    • "deleted" (BOOLEAN), optional; default FALSE if not provided
  //    • one BIGINT per link, named by whoever declared it
  //    • "account" (required, non-null slash-delimited account string) on
  //      ACCOUNTING-enabled tables
  //
  // Type expectations by SQL type:
  // - TEXT: string value; empty string is treated as NULL
  // - BOOLEAN: bool value
  // - TIMESTAMPTZ: ISO 8601/RFC 3339 string (parsed to TIMESTAMPTZ)
  // - INTEGER: number with no fractional part and within i32 range
  // - BIGINT: canonical integer string for the full i64 range; a number is
  //   accepted only within protobuf NumberValue's exact integer range
  // - NUMERIC(p,s): string representation only; empty string becomes NULL
  //   (numbers for NUMERIC are rejected to avoid precision loss)
  //
  // Script validation rules:
  // - If a script exists for a target column, that column MUST be present here,
  //   and its provided value MUST equal the script’s computed value (type-aware
  //   comparison, e.g., decimals are compared numerically).
  //
  // Notes:
// - Unknown/invalid column names are rejected
// - Some application-specific validations may apply (e.g., max length for
//   certain fields like "telefon")
map<string, google.protobuf.Value> data = 3;
}

message PostAccountingTableDataRequest {
  PostTableDataRequest row = 1;
  komp_ac.exchange_rates.ExchangeRateSelection exchange_rate_selection = 2;
}

// Insert response.
message PostTableDataResponse {
  // True if the insert succeeded.
  bool success = 1;

  // Human-readable message.
  string message = 2;

  // The id of the inserted row.
  int64 inserted_id = 3;

  // Revision committed for the inserted row.
  int64 row_revision = 4;

  // Journal created or updated by automatic accounting, when applicable.
  optional int64 journal_id = 5;

}

message BeginTableDataImportRequest {
  string profile_name = 1;
}

message BeginTableDataImportResponse {
  string import_id = 1;
}

message StageTableDataImportRequest {
  string import_id = 1;
  string table_name = 2;
  repeated TableDataImportRow rows = 3;
  // Import-contract revision returned by GetTableImportDescriptor. A zero
  // value is accepted for older clients and snapshots the current revision.
  int64 expected_table_revision = 4;
}

message TableDataImportRow {
  // Required. Data payload for one staged row.
  map<string, google.protobuf.Value> data = 1;
}

message StageTableDataImportResponse {
  int64 staged_rows = 1;
  int64 total_staged_rows = 2;
}

message CommitTableDataImportRequest {
  string import_id = 1;
}

message CommitTableDataImportResponse {
  bool success = 1;
  int64 inserted_rows = 2;
}

message AbortTableDataImportRequest {
  string import_id = 1;
}

message AbortTableDataImportResponse {
  bool success = 1;
}

// Update an existing row.
message PutTableDataRequest {
  // Required. Profile (schema) name.
  string profile_name = 1;

  // Required. Table name within the profile.
  string table_name = 2;

  // Required. Id of the row to update.
  int64 id = 3;

  // Required. Columns to update (same typing rules as PostTableDataRequest.data).
  // "account" may be omitted, but cannot be null when supplied.
  //
  // Special script rules:
  // - If a script targets column X and X is included here, the value for X must
  //   equal the script’s result (type-aware).
  // - If X is not included here but the update would cause the script’s result
  //   to change compared to the current stored value, the update is rejected with
  //   FAILED_PRECONDITION, instructing the caller to include X explicitly.
  //
  // Passing an empty map results in a no-op success response.
  map<string, google.protobuf.Value> data = 4;

  // Required. Revision returned when this row was loaded or last saved.
  int64 expected_revision = 5;

}

message PutAccountingTableDataRequest {
  PutTableDataRequest update = 1;
  komp_ac.exchange_rates.ExchangeRateSelection exchange_rate_selection = 2;
  bool confirmed = 3;
  repeated string expected_affected_profiles = 4;
}

message PutTableDataConfirmedRequest {
  PutTableDataRequest update = 1;
  repeated string expected_affected_profiles = 2;
}

// Update response.
message PutTableDataResponse {
  // True if the update succeeded (or no-op on empty data).
  bool success = 1;

  // Human-readable message.
  string message = 2;

  // The id of the updated row.
  int64 updated_id = 3;

  // Revision committed for the updated row.
  int64 row_revision = 4;

  // Journal updated by automatic accounting, when applicable.
  optional int64 journal_id = 5;
}

message TableUpdateImpactRequest {
  string profile_name = 1;
  string table_name = 2;
  int64 id = 3;
}

message TableUpdateImpactResponse {
  repeated string affected_profiles = 1;
}

message ArchiveTableDataRequest {
  string profile_name = 1;
  string table_name = 2;
  int64 id = 3;
  int64 expected_revision = 4;
}

message ArchiveTableDataResponse {
  bool success = 1;
  int64 archived_version = 2;
  string archived_at = 3;
  repeated string affected_profiles = 4;
  int64 current_version = 5;
  int64 row_revision = 6;
}

// Soft-delete a single row.
message DeleteTableDataRequest {
  // Required. Profile (schema) name.
  string profile_name = 1;

  // Required. Table name within the profile.
  string table_name = 2;

  // Required. Row id to soft-delete.
  int64 record_id = 3;

  // Required. Revision returned when this row was loaded or last saved.
  int64 expected_revision = 4;
}

// Soft-delete response.
message DeleteTableDataResponse {
  // True when the row was successfully marked deleted.
  bool success = 1;
}

// Fetch a single non-deleted row by id.
message GetTableDataRequest {
  // Required. Profile (schema) name.
  string profile_name = 1;

  // Required. Table name within the profile.
  string table_name = 2;

  // Required. Id of the row to fetch.
  int64 id = 3;

}

message GetTableDataVersionRequest {
  string profile_name = 1;
  string table_name = 2;
  int64 id = 3;
  int64 version = 4;
}

// A link resolved exactly as the source row stored it, together with the
// target row's current state. The physical companion version column remains
// an internal implementation detail.
enum ResolvedTableLinkStatus {
  CURRENT = 0;
  SUPERSEDED = 1;
  UNAVAILABLE = 2;
  DELETED = 3;
  // The source row may expose the FK and the target's configured display
  // columns, but the caller may not read the target table itself.
  RESTRICTED = 4;
}

message ResolvedTableLinkVersion {
  int64 version = 1;
  map<string, string> data = 2;
  repeated string row_display_values = 3;
  repeated string row_display_columns = 4;
}

message ResolvedTableLinkUpdate {
  int64 version = 1;
  map<string, string> data = 2;
  repeated string row_display_values = 3;
  repeated string changed_fields = 4;
}

message ResolvedTableLink {
  int64 id = 1;
  ResolvedTableLinkVersion saved = 2;
  ResolvedTableLinkStatus status = 3;
  ResolvedTableLinkUpdate newer = 4;
}

// Row payload: all columns returned as strings.
message GetTableDataResponse {
  // Map of column_name → stringified value for:
  // - id, deleted
  // - all user-defined columns from the table definition
  // - one column per link, named by whoever declared it
  // - account for ACCOUNTING-enabled tables
  //
  // All values are returned as TEXT via col::TEXT and COALESCEed to empty string
  // (NULL becomes ""). The row is returned only if deleted = FALSE.
  map<string, string> data = 1;

  // Configured human-readable values for this row, in display order. A value
  // is empty when its column is NULL/empty; an empty list means the row is
  // identified by its id alone.
  repeated string row_display_values = 2;
  repeated string row_display_columns = 3;

  // Links keyed by their public column name. Each value contains the row as
  // saved by this record and, when the caller may read the target table, its
  // newest available state. Restricted links contain only the target table's
  // configured display columns.
  map<string, ResolvedTableLink> resolved_links = 4;

  // The generation returned by this response. Zero is never returned.
  int64 row_version = 5;

  // Active journal containing this row's automatic accounting line, when the
  // table is ACCOUNTING-enabled and the row has been posted.
  optional int64 journal_id = 6;

  // Present when the row was loaded through a form-navigation RPC. The row and
  // its numbering bounds come from the same server operation.
  RowNavigation navigation = 7;
}

// Count non-deleted rows.
message GetTableDataCountRequest {
  // Required. Profile (schema) name.
  string profile_name = 1;

  // Required. Table name within the profile.
  string table_name = 2;
}

// Fetch the last visible row by stable row id.
message GetLastTableDataRequest {
  string profile_name = 1;
  string table_name = 2;
  RowNavigationMode navigation_mode = 3;
}

// Controls how an unfiltered form numbers rows.
enum RowNavigationMode {
  // Actual database row id / highest visible row id. Deleted ids leave gaps.
  ROW_NAVIGATION_MODE_ID = 0;
  // Ordinal position / exact visible-row count. Deleted rows are omitted.
  ROW_NAVIGATION_MODE_POSITION = 1;
}

// Complete numbering state returned with a navigated row.
message RowNavigation {
  RowNavigationMode mode = 1;
  // Actual row id in ID mode; 1-based ordinal in POSITION mode. For an empty
  // table this is the first new-row slot (1).
  uint64 current = 2;
  // Highest visible id in ID mode; exact visible-row count in POSITION mode.
  uint64 total = 3;
}

message GetLastTableDataResponse {
  // Zero when the table has no visible rows. Retained as row identity; clients
  // should use navigation for display bounds.
  int64 last_id = 1;
  // Absent when last_id is zero.
  GetTableDataResponse row = 2;
  RowNavigation navigation = 3;
}

enum RowIdDirection {
  ROW_ID_DIRECTION_NEXT = 0;
  ROW_ID_DIRECTION_PREVIOUS = 1;
}

message GetAdjacentTableDataRequest {
  string profile_name = 1;
  string table_name = 2;
  int64 anchor_id = 3;
  RowIdDirection direction = 4;
  RowNavigationMode navigation_mode = 5;
  // Current ordinal position when navigation_mode is POSITION. Ignored in ID mode.
  uint64 anchor_position = 6;
}

message GetAdjacentTableDataResponse {
  // Absent when no visible row exists in the requested direction.
  GetTableDataResponse row = 1;
  RowNavigation navigation = 2;
}

// Fetch by ordinal position among non-deleted rows (1-based).
message GetTableDataByPositionRequest {
  // Required. Profile (schema) name.
  string profile_name = 1;

  // Required. Table name within the profile.
  string table_name = 2;

  // Set this or record_id, never both. This is the 1-based position by id
  // ascending among rows with deleted = FALSE.
  int32 position = 3;
  // Direct row lookup that also returns its ID or ordinal navigation bounds.
  int64 record_id = 4;
  RowNavigationMode navigation_mode = 5;
}