import type { SerializedProjectCommand } from "./project-command.model.js";

export const circuitDeviceRowInsertCommandType =
  "circuit-device-row.insert" as const;
export const circuitDeviceRowDeleteCommandType =
  "circuit-device-row.delete" as const;
export const circuitDeviceRowStructureCommandSchemaVersion = 1 as const;

export interface CircuitDeviceRowSnapshot {
  id: string;
  circuitId: string;
  linkedProjectDeviceId: string | null;
  legacyConsumerId: string | null;
  sortOrder: number;
  name: string;
  displayName: string;
  phaseType: string | null;
  connectionKind: string | null;
  costGroup: string | null;
  category: string | null;
  level: string | null;
  roomId: string | null;
  roomNumberSnapshot: string | null;
  roomNameSnapshot: string | null;
  quantity: number;
  powerPerUnit: number;
  simultaneityFactor: number;
  cosPhi: number | null;
  remark: string | null;
  overriddenFields: string | null;
}

export interface CircuitDeviceRowInsertCommandPayload {
  row: CircuitDeviceRowSnapshot;
}

export interface CircuitDeviceRowDeleteCommandPayload {
  rowId: string;
  expectedCircuitId: string;
}

export interface CircuitDeviceRowInsertProjectCommand
  extends SerializedProjectCommand<CircuitDeviceRowInsertCommandPayload> {
  schemaVersion: typeof circuitDeviceRowStructureCommandSchemaVersion;
  type: typeof circuitDeviceRowInsertCommandType;
}

export interface CircuitDeviceRowDeleteProjectCommand
  extends SerializedProjectCommand<CircuitDeviceRowDeleteCommandPayload> {
  schemaVersion: typeof circuitDeviceRowStructureCommandSchemaVersion;
  type: typeof circuitDeviceRowDeleteCommandType;
}

export type CircuitDeviceRowStructureProjectCommand =
  | CircuitDeviceRowInsertProjectCommand
  | CircuitDeviceRowDeleteProjectCommand;

export function createCircuitDeviceRowInsertProjectCommand(
  row: CircuitDeviceRowSnapshot
): CircuitDeviceRowInsertProjectCommand {
  const command: CircuitDeviceRowInsertProjectCommand = {
    schemaVersion: circuitDeviceRowStructureCommandSchemaVersion,
    type: circuitDeviceRowInsertCommandType,
    payload: { row },
  };
  assertCircuitDeviceRowInsertProjectCommand(command);
  return command;
}

export function createCircuitDeviceRowDeleteProjectCommand(
  rowId: string,
  expectedCircuitId: string
): CircuitDeviceRowDeleteProjectCommand {
  const command: CircuitDeviceRowDeleteProjectCommand = {
    schemaVersion: circuitDeviceRowStructureCommandSchemaVersion,
    type: circuitDeviceRowDeleteCommandType,
    payload: { rowId, expectedCircuitId },
  };
  assertCircuitDeviceRowDeleteProjectCommand(command);
  return command;
}

export function assertCircuitDeviceRowInsertProjectCommand(
  command: SerializedProjectCommand<unknown>
): asserts command is CircuitDeviceRowInsertProjectCommand {
  if (
    command.schemaVersion !==
      circuitDeviceRowStructureCommandSchemaVersion ||
    command.type !== circuitDeviceRowInsertCommandType
  ) {
    throw new Error("Unsupported circuit device-row insert command.");
  }
  if (!isPlainObject(command.payload)) {
    throw new Error("Circuit device-row insert payload must be an object.");
  }
  const row = command.payload.row;
  if (!isPlainObject(row)) {
    throw new Error("Circuit device-row insert command requires a row.");
  }

  assertNonEmptyString(row.id, "row.id");
  assertNonEmptyString(row.circuitId, "row.circuitId");
  assertNullableString(row.linkedProjectDeviceId, "row.linkedProjectDeviceId");
  assertNullableString(row.legacyConsumerId, "row.legacyConsumerId");
  assertFiniteNumber(row.sortOrder, "row.sortOrder");
  assertNonEmptyString(row.name, "row.name");
  assertNonEmptyString(row.displayName, "row.displayName");
  for (const field of [
    "phaseType",
    "connectionKind",
    "costGroup",
    "category",
    "level",
    "roomId",
    "roomNumberSnapshot",
    "roomNameSnapshot",
    "remark",
    "overriddenFields",
  ] as const) {
    assertNullableString(row[field], `row.${field}`);
  }
  assertNonNegativeNumber(row.quantity, "row.quantity");
  assertNonNegativeNumber(row.powerPerUnit, "row.powerPerUnit");
  assertNonNegativeNumber(
    row.simultaneityFactor,
    "row.simultaneityFactor"
  );
  if (row.cosPhi !== null) {
    assertFiniteNumber(row.cosPhi, "row.cosPhi");
    if (row.cosPhi <= 0) {
      throw new Error("row.cosPhi must be positive or null.");
    }
  }
}

export function assertCircuitDeviceRowDeleteProjectCommand(
  command: SerializedProjectCommand<unknown>
): asserts command is CircuitDeviceRowDeleteProjectCommand {
  if (
    command.schemaVersion !==
      circuitDeviceRowStructureCommandSchemaVersion ||
    command.type !== circuitDeviceRowDeleteCommandType
  ) {
    throw new Error("Unsupported circuit device-row delete command.");
  }
  if (!isPlainObject(command.payload)) {
    throw new Error("Circuit device-row delete payload must be an object.");
  }
  assertNonEmptyString(command.payload.rowId, "rowId");
  assertNonEmptyString(
    command.payload.expectedCircuitId,
    "expectedCircuitId"
  );
}

function assertNonEmptyString(value: unknown, field: string) {
  if (typeof value !== "string" || !value.trim()) {
    throw new Error(`${field} must be a non-empty string.`);
  }
}

function assertNullableString(value: unknown, field: string) {
  if (value !== null && typeof value !== "string") {
    throw new Error(`${field} must be a string or null.`);
  }
}

function assertFiniteNumber(
  value: unknown,
  field: string
): asserts value is number {
  if (typeof value !== "number" || !Number.isFinite(value)) {
    throw new Error(`${field} must be a finite number.`);
  }
}

function assertNonNegativeNumber(value: unknown, field: string) {
  assertFiniteNumber(value, field);
  if (value < 0) {
    throw new Error(`${field} must not be negative.`);
  }
}

function isPlainObject(value: unknown): value is Record<string, unknown> {
  return value !== null && typeof value === "object" && !Array.isArray(value);
}