/**
 * 固件维护页的 IPC 与 DTO。
 *
 * 字段名与 `desktop/src-tauri/src/maintenance.rs` 的 `#[serde(rename_all = "camelCase")]`
 * 一一对应；改一边必须改另一边。
 */

import { invoke } from "@tauri-apps/api/core";
import { open } from "@tauri-apps/plugin-dialog";

export interface PortInfo {
  portName: string;
  label: string;
  vid: number | null;
  pid: number | null;
  likelyEsp: boolean;
}

export interface PartitionEntry {
  name: string;
  kind: number;
  subtype: number;
  offset: number;
  size: number;
  flags: number;
}

export interface FreeRange {
  start: number;
  size: number;
}

export interface AppInfo {
  offset: number;
  version: string;
  projectName: string;
  buildTime: string;
  idfVersion: string;
}

export interface DeviceSnapshot {
  port: string;
  chip: string;
  revision: string | null;
  flashSize: number;
  flashSizeText: string;
  mac: string | null;
  features: string[];
  secureBoot: boolean;
  secureDownload: boolean;
  flashEncryption: boolean;
  securityFlags: number;
  flashCryptCnt: number;
  partitionTable: PartitionEntry[];
  app: AppInfo | null;
  freeRanges: FreeRange[];
  tableSha256: string;
}

export interface BundleInfo {
  path: string;
  sourceKind: string;
  sourcePath: string;
  sourceSha256: string | null;
  entryCount: number | null;
  name: string;
  version: string;
  chip: string;
  appFile: string;
  appSha256: string;
  appSize: number;
  partitionTableFile: string;
  partitionTableSha256: string;
  bootloaderFile: string | null;
  bootloaderSha256: string | null;
  appPartitionSize: number;
  flashSize: string;
  flashSizeBytes: number;
  flashMode: string;
  flashFrequency: string;
  notes: string | null;
}

export interface SlotCandidate {
  offset: number;
  size: number;
}

export interface FlashPlan {
  port: string;
  device: DeviceSnapshot;
  bundle: BundleInfo;
  candidates: SlotCandidate[];
  targetOffset: number;
  targetSize: number;
  appSize: number;
  appPartitionSize: number;
  currentFactoryOffset: number;
  currentFactorySize: number;
  currentTable: PartitionEntry[];
  patchedTable: PartitionEntry[];
  tableShaBefore: string;
  tableShaAfter: string;
  oldAppPreserved: boolean;
  warnings: string[];
  canFlash: boolean;
}

export interface Mismatch {
  offset: number;
  expected: number;
  actual: number;
}

export interface SlotAttempt {
  offset: number;
  size: number;
  writeOk: boolean;
  verifyOk: boolean;
  mismatches: Mismatch[];
  badSectors: number[];
  error: string | null;
}

export interface FlashProgress {
  phase: string;
  message: string;
  current: number;
  total: number;
}

export interface FlashReport {
  ok: boolean;
  port: string;
  chip: string;
  mac: string | null;
  bundleName: string;
  bundleVersion: string;
  targetOffset: number;
  targetSize: number;
  appSize: number;
  appSha256: string;
  tableShaBefore: string;
  tableShaAfter: string;
  attempts: SlotAttempt[];
  appVerified: boolean;
  tableVerified: boolean;
  tableRestored: boolean;
  needsRollback: boolean;
  bootOk: boolean | null;
  bootLog: string;
  backupDir: string;
  note: string | null;
  error: string | null;
  startedAt: string;
  finishedAt: string;
}

async function call<T>(command: string, args?: Record<string, unknown>): Promise<T> {
  try {
    return await invoke<T>(command, args);
  } catch (raw) {
    throw new Error(typeof raw === "string" ? raw : String(raw));
  }
}

export const maintenanceApi = {
  listPorts: () => call<PortInfo[]>("maintenance_list_ports"),
  loadBundle: (path: string) => call<BundleInfo>("maintenance_load_bundle", { path }),
  probe: (port: string) => call<DeviceSnapshot>("maintenance_probe", { port }),
  plan: (port: string, bundlePath: string) =>
    call<FlashPlan>("maintenance_plan", { port, bundlePath }),
  flash: (port: string, bundlePath: string, backupApp = true) =>
    call<FlashReport>("maintenance_flash", { port, bundlePath, backupApp }),
  restoreTable: (port: string, backupDir: string) =>
    call<string>("maintenance_restore_table", { port, backupDir }),
  cancel: () => call<void>("maintenance_cancel"),
};

/** 原生 .zip 选择。返回 null 表示用户取消。 */
export async function selectBundleZip(): Promise<string | null> {
  const selected = await open({
    directory: false,
    multiple: false,
    title: "选择官方固件包（.zip）",
    filters: [{ name: "固件包", extensions: ["zip"] }],
  });
  return typeof selected === "string" ? selected : null;
}

/** 兼容旧包：选择目录。返回 null 表示用户取消。 */
export async function selectBundleDirectory(): Promise<string | null> {
  const selected = await open({
    directory: true,
    multiple: false,
    title: "选择官方固件包目录（含 bundle.json）",
  });
  return typeof selected === "string" ? selected : null;
}

export function formatBytes(value: number): string {
  if (value >= 1024 * 1024) return `${(value / (1024 * 1024)).toFixed(2)} MiB`;
  if (value >= 1024) return `${(value / 1024).toFixed(1)} KiB`;
  return `${value} B`;
}

export function formatOffset(value: number): string {
  return `0x${value.toString(16).toUpperCase().padStart(6, "0")}`;
}

export function shortSha(value: string): string {
  return value.length > 16 ? `${value.slice(0, 12)}…${value.slice(-4)}` : value;
}