const DROP_SENSITIVE = Object.freeze([
  "cause",
  "body",
  "headers",
  "authorization",
  "url",
  "query",
  "stack",
  "storageValue",
]);

/**
 * @typedef {"retry" | "reauth" | "navigate" | "reload-once" |
 *   "contact-support" | "none"} ErrorAction
 */

/**
 * @typedef {{
 *   kind: string,
 *   defaultRetryable: boolean,
 *   severity: string,
 *   userMessageKey: string,
 *   action: ErrorAction,
 *   telemetryEvent: string,
 *   redaction: readonly string[]
 * }} ErrorDefinition
 */

/**
 * @param {string} kind
 * @param {boolean} defaultRetryable
 * @param {string} severity
 * @param {ErrorAction} action
 * @param {string} [telemetryEvent]
 * @returns {Readonly<ErrorDefinition>}
 */
const row = (
  kind,
  defaultRetryable,
  severity,
  action,
  telemetryEvent = "api.request.failed",
) =>
  Object.freeze({
    kind,
    defaultRetryable,
    severity,
    userMessageKey: `error.${kind.toLowerCase()}`,
    action,
    telemetryEvent,
    redaction: DROP_SENSITIVE,
  });

export const ERROR_REGISTRY = Object.freeze({
  NETWORK_UNREACHABLE: row("NETWORK_UNREACHABLE", true, "warning", "retry"),
  REQUEST_TIMEOUT: row("REQUEST_TIMEOUT", true, "warning", "retry"),
  REQUEST_ABORTED: row("REQUEST_ABORTED", false, "info", "none"),
  CONTENT_TYPE_MISMATCH: row(
    "CONTENT_TYPE_MISMATCH",
    false,
    "error",
    "contact-support",
  ),
  MALFORMED_JSON: row("MALFORMED_JSON", false, "error", "contact-support"),
  ENVELOPE_MISMATCH: row("ENVELOPE_MISMATCH", false, "error", "contact-support"),
  SCHEMA_MISMATCH: row("SCHEMA_MISMATCH", false, "error", "contact-support"),
  AUTH_REQUIRED: row("AUTH_REQUIRED", false, "info", "reauth"),
  AUTH_INTEGRATION_FAILURE: row(
    "AUTH_INTEGRATION_FAILURE",
    false,
    "error",
    "contact-support",
  ),
  FORBIDDEN: row("FORBIDDEN", false, "warning", "navigate"),
  NOT_FOUND: row("NOT_FOUND", false, "info", "navigate"),
  CONFLICT: row("CONFLICT", false, "warning", "retry"),
  VALIDATION_REJECTED: row("VALIDATION_REJECTED", false, "info", "none"),
  UNKNOWN_CLIENT_FAILURE: row(
    "UNKNOWN_CLIENT_FAILURE",
    false,
    "warning",
    "contact-support",
  ),
  RATE_LIMITED: row("RATE_LIMITED", true, "warning", "retry"),
  SERVER_FAILURE: row("SERVER_FAILURE", true, "error", "retry"),
  CHUNK_LOAD_FAILURE: row(
    "CHUNK_LOAD_FAILURE",
    false,
    "error",
    "reload-once",
    "release.mismatch.detected",
  ),
  BOOT_CONFIG_FAILURE: row(
    "BOOT_CONFIG_FAILURE",
    false,
    "error",
    "contact-support",
    "app.boot.failed",
  ),
  RELEASE_MANIFEST_FAILURE: row(
    "RELEASE_MANIFEST_FAILURE",
    false,
    "error",
    "contact-support",
    "app.boot.failed",
  ),
  DEPLOY_MISMATCH: row(
    "DEPLOY_MISMATCH",
    false,
    "error",
    "reload-once",
    "release.mismatch.detected",
  ),
  BUILD_MISMATCH: row(
    "BUILD_MISMATCH",
    false,
    "error",
    "reload-once",
    "release.mismatch.detected",
  ),
  CONFIG_MISMATCH: row(
    "CONFIG_MISMATCH",
    false,
    "error",
    "contact-support",
    "app.boot.failed",
  ),
  API_CONTRACT_MISMATCH: row(
    "API_CONTRACT_MISMATCH",
    false,
    "error",
    "contact-support",
    "app.boot.failed",
  ),
  RELEASE_MISMATCH: row(
    "RELEASE_MISMATCH",
    false,
    "error",
    "reload-once",
    "release.mismatch.detected",
  ),
  ASSET_MISMATCH: row(
    "ASSET_MISMATCH",
    false,
    "error",
    "reload-once",
    "release.mismatch.detected",
  ),
  STORAGE_UNAVAILABLE: row(
    "STORAGE_UNAVAILABLE",
    false,
    "warning",
    "none",
    "storage.operation.failed",
  ),
  STORAGE_QUOTA_EXCEEDED: row(
    "STORAGE_QUOTA_EXCEEDED",
    false,
    "warning",
    "none",
    "storage.operation.failed",
  ),
  RENDER_FAILURE: row(
    "RENDER_FAILURE",
    false,
    "error",
    "reload-once",
    "ui.render.failed",
  ),
  TELEMETRY_FAILURE: row(
    "TELEMETRY_FAILURE",
    false,
    "info",
    "none",
    "telemetry.delivery.dropped",
  ),
  QUERY_CACHE_FAILURE: row(
    "QUERY_CACHE_FAILURE",
    false,
    "error",
    "retry",
    "query.cache.failed",
  ),
  UNKNOWN_FAILURE: row("UNKNOWN_FAILURE", false, "error", "contact-support"),
});

/**
 * @typedef {{
 *   kind: string,
 *   code: string,
 *   httpStatus?: number,
 *   retryable: boolean,
 *   operationId: string,
 *   attemptCount: number,
 *   requestId?: string,
 *   traceId?: string,
 *   retryAfterMs?: number,
 *   validationIssues?: readonly Readonly<{path: string, code: string}>[],
 *   userMessageKey: string,
 *   action: ErrorAction,
 *   causeClass?: string
 * }} ApiFailure
 */

/**
 * @param {string} kind
 * @param {string} operationId
 * @param {number} attempt
 * @param {{
 *   code?: string,
 *   httpStatus?: number,
 *   requestId?: string,
 *   traceId?: string,
 *   retryAfterMs?: number,
 *   validationIssues?: readonly Readonly<{path: string, code: string}>[],
 *   causeClass?: string
 * }} [details]
 * @returns {ApiFailure}
 */
export function createFailure(kind, operationId, attempt, details = {}) {
  const registry =
    /** @type {Readonly<Record<string, Readonly<ErrorDefinition>>>} */ (
      ERROR_REGISTRY
    );
  const definition =
    registry[kind] ?? ERROR_REGISTRY.UNKNOWN_FAILURE;
  return Object.freeze({
    kind: definition.kind,
    code: typeof details.code === "string" ? details.code : definition.kind,
    retryable: definition.defaultRetryable,
    operationId,
    attemptCount: Math.max(1, attempt + 1),
    ...(Number.isInteger(details.httpStatus)
      ? { httpStatus: details.httpStatus }
      : {}),
    ...(typeof details.requestId === "string" ? { requestId: details.requestId } : {}),
    ...(typeof details.traceId === "string" ? { traceId: details.traceId } : {}),
    ...(typeof details.retryAfterMs === "number"
      ? { retryAfterMs: details.retryAfterMs }
      : {}),
    ...(Array.isArray(details.validationIssues)
      ? {
          validationIssues: Object.freeze(
            details.validationIssues
              .filter(
                (issue) =>
                  issue &&
                  typeof issue === "object" &&
                  typeof issue.path === "string" &&
                  typeof issue.code === "string",
              )
              .slice(0, 50)
              .map((issue) =>
                Object.freeze({ path: issue.path, code: issue.code }),
              ),
          ),
        }
      : {}),
    ...(typeof details.causeClass === "string"
      ? { causeClass: details.causeClass }
      : {}),
    userMessageKey: definition.userMessageKey,
    action: definition.action,
  });
}

/**
 * Projects an untrusted 422 details payload into the only validation metadata
 * allowed to cross the HTTP boundary. Backend copy and additional values are
 * deliberately discarded.
 *
 * @param {unknown} value
 * @returns {readonly Readonly<{path: string, code: string}>[]}
 */
export function safeValidationIssues(value) {
  if (!value || typeof value !== "object") return Object.freeze([]);
  const candidate =
    /** @type {{issues?: unknown, fieldErrors?: unknown}} */ (value);
  const issues = Array.isArray(candidate.issues)
    ? candidate.issues
    : Array.isArray(candidate.fieldErrors)
      ? candidate.fieldErrors
      : [];
  return Object.freeze(
    issues
      .filter(
        (issue) =>
          issue &&
          typeof issue === "object" &&
          typeof issue.path === "string" &&
          typeof issue.code === "string" &&
          issue.path.length <= 120 &&
          issue.code.length <= 80,
      )
      .slice(0, 50)
      .map((issue) =>
        Object.freeze({
          path: issue.path,
          code: issue.code,
        }),
      ),
  );
}

/** @param {number} status */
export function kindForStatus(status) {
  if (status === 401) return "AUTH_REQUIRED";
  if (status === 403) return "FORBIDDEN";
  if (status === 404) return "NOT_FOUND";
  if (status === 409) return "CONFLICT";
  if (status === 422) return "VALIDATION_REJECTED";
  if (status === 429) return "RATE_LIMITED";
  if (status >= 500) return "SERVER_FAILURE";
  if (status >= 400) return "UNKNOWN_CLIENT_FAILURE";
  return "ENVELOPE_MISMATCH";
}

/**
 * Total catch-all that intentionally discards the thrown value.
 *
 * @param {unknown} value
 * @param {{ operationId?: string, attempt?: number }} [context]
 */
export function normalizeUnknownFailure(value, context = {}) {
  const causeClass =
    value instanceof Error
      ? value.name
      : value === null
        ? "null"
        : typeof value;

  return createFailure(
    "UNKNOWN_FAILURE",
    context.operationId ?? "UNKNOWN_OPERATION",
    context.attempt ?? 0,
    { code: "UNKNOWN_FAILURE", causeClass },
  );
}