import { realExcluded } from "./error-map.mjs";

export const LIMITS = Object.freeze({
  max_command_bytes: 65536,
  max_snapshot_bytes: 1048576,
  max_tick_step: 1000000,
  max_event_records: 256,
  max_workspace_path_bytes: 1024,
  max_workspace_file_bytes: 64 * 1024 * 1024,
});

export const COMMANDS = Object.freeze([
  "SESSION_ATTACH", "LOAD_WORKSPACE", "COMMAND", "SIM_STEP", "SNAPSHOT_REQUEST",
  "PROGRAM_LOAD", "PROGRAM_RUN", "PROGRAM_PAUSE", "PROGRAM_RESUME", "PROGRAM_ABORT", "PROGRAM_RESTART",
  "PROGRAM_STEP", "PROGRAM_SEEK", "MDI_EXECUTE", "CHECKPOINT", "RECOVER", "DESTROY", "POWER", "RESET",
  "SET_MODE", "SET_OVERRIDE", "JOG_START", "JOG_STOP", "HOME", "ESTOP", "IO_RECOVER", "LIMIT_SET", "FOLLOWING_ERROR",
  "SPINDLE_COMMAND", "SPINDLE_FAULT", "SPINDLE_INHIBIT", "SPINDLE_ORIENT", "SPINDLE_ORIENTED", "TOOL_PREPARE", "TOOL_PREPARED", "TOOL_CHANGE", "TOOL_CHANGED", "TOOL_ABORT", "TOOL_FAULT", "TOOL_CLEAR_FAULT", "PROBE_CONFIG",
  "ENCODER_SET", "COOLANT_COMMAND", "COOLANT_FAULT", "DOOR_SET", "INTERLOCK_SET", "INTERLOCK_RESET", "DEVICE_ESTOP", "DEVICE_ACK_ISSUE", "DEVICE_ACK", "DEVICE_ACK_ABORT",
  "CONFIGURATION_BATCH",
]);

export const EXCLUSIONS = Object.freeze([
  realExcluded("real_hardware", "browser_has_no_direct_machine_control", "digital_twin"),
  realExcluded("linux_realtime_kernel", "wasm_worker_uses_logical_ticks", "fixed_tick_scheduler"),
  realExcluded("host_device_access", "browser_sandbox_disallows_arbitrary_devices", "virtual_device_adapter"),
]);

export function capabilities(contextId) {
  return {
    context_id: contextId,
    abi: 1,
    protocol: 1,
    snapshot: 1,
    event: 1,
    workspace: 1,
    commands: [...COMMANDS],
    worker_storage_commands: ["UI_STATE_SAVE", "UI_STATE_LOAD", "UI_STATE_CLEAR"],
    streams: ["STATE_SNAPSHOT", "EVENT", "ALARM"],
    storage: {
      owner: "dedicated-worker",
      ui_state: "opfs_temp_json_v1",
      power_off_checkpoint: "opfs_temp_json_v1",
      authority: "linuxcnc-wasm-remains-authoritative",
    },
    limits: { ...LIMITS },
    exclusions: EXCLUSIONS.map((entry) => ({ ...entry })),
  };
}

export function validateLimit(name, value) {
  if (!(name in LIMITS)) return { status: "blocked", code: "capability_unknown_limit", message_key: "capability.unknown_limit", limit: name };
  if (!Number.isSafeInteger(value) || value < 0) return { status: "blocked", code: "capability_invalid_value", message_key: "capability.invalid_value", limit: name, value };
  if (value > LIMITS[name]) return { status: "blocked", code: "capability_limit_exceeded", message_key: "capability.limit_exceeded", limit: name, value, maximum: LIMITS[name] };
  return { status: "accepted", limit: name, value, maximum: LIMITS[name] };
}