// The app folders of this machine: one list shared by the CLI and the desktop app, ~/.storebound/projects.json
// (STOREBOUND_REGISTRY names another file). `storebound desktop` in an app folder, `storebound apps add`, `ws init` and
// the desktop's App folders screen add to it; `storebound apps folders` and the desktop show it; `storebound ws ...`
// without a storebound.workspace.json works over it. The desktop keeps its per-folder extras (mapped accounts, saved
// reads) in its own state by the same id. Only paths and names: no keys, nothing from inside the folders.
//   { "version": 1, "projects": [{ "id": "<16 hex>", "path": "/abs/folder", "name": "Star Dash", "added": "<iso>" }],
//     "storeApps": [{ "id": "<16 hex>", "store": "apple", "appId": "6400000000", "account": "teamA", "name": "Demo App",
//                     "bundleId": "com.example.demo", "added": "<iso>" }] }
// storeApps: apps that are live on a store but have no project on this machine (`storebound apps add --store apple
// --app-id <id> --account <profile>`). The desktop shows them read-only (status, reviews, analytics) under that
// profile's account, noted "no local project"; they carry no path. Absent when there are none (older readers ignore it).
// Written atomically (temp file, rename); a missing or unreadable file reads as empty (an unreadable one is kept).
import { consoleLink } from './console-links';
import { createHash } from 'node:crypto';
import { copyFileSync, existsSync, mkdirSync, readdirSync, readFileSync, renameSync, statSync, writeFileSync } from 'node:fs';
import { homedir } from 'node:os';
import { basename, dirname, join, resolve } from 'node:path';

/** The store sides an entry can be ignored on. */
export type IgnoreStore = 'apple' | 'play';
export const IGNORE_STORES: IgnoreStore[] = ['apple', 'play'];
/** `ignored` (optional, on both kinds of entry): the store sides storebound leaves out of watch, events, portfolio reads and the
 *  desktop lists. Both listed = the whole app is ignored. Storebound-side visibility only: nothing changes in the stores. */
export interface RegistryProject { id: string; path: string; name: string; added: string; ignored?: IgnoreStore[] }
/** A store app without a local project: store + app id (Apple: the numeric app id; Play: the package name), the
 *  credential profile that reads it. */
export interface StoreOnlyApp { id: string; store: 'apple' | 'play'; appId: string; account: string | null; name: string; bundleId: string | null; added: string; ignored?: IgnoreStore[] }
export interface Registry { version: 1; projects: RegistryProject[]; storeApps?: StoreOnlyApp[] }

export const registryFile = (env: Record<string, string | undefined> = process.env): string => env.STOREBOUND_REGISTRY || join(homedir(), '.storebound', 'projects.json');

/** The id of a folder the CLI adds: stable per absolute path (the same as `ws desktop export`'s project ids). */
export const folderId = (absPath: string): string => createHash('sha256').update(`project:${absPath}`).digest('hex').slice(0, 16);

const ID = /^[0-9a-f]{16}$/;

/** The id of a store-only entry: stable per store and app id. */
export const storeAppId = (store: 'apple' | 'play', appId: string): string => createHash('sha256').update(`store:${store}:${appId}`).digest('hex').slice(0, 16);
export const APPLE_APP_ID = /^\d{6,12}$/;
export const PACKAGE_NAME = /^[A-Za-z][A-Za-z0-9_]*(\.[A-Za-z][A-Za-z0-9_]*)+$/;

/** The valid, unique, ordered store sides of a raw `ignored` value. */
const parseIgnored = (v: unknown): IgnoreStore[] => (Array.isArray(v) ? IGNORE_STORES.filter(x => v.includes(x)) : []);

/** Store-only entries of the file's JSON; malformed ones are dropped. Pure. */
function parseStoreApps(list: unknown): StoreOnlyApp[] {
  const out: StoreOnlyApp[] = [];
  if (Array.isArray(list)) for (const x of list) {
    const o = x as Partial<StoreOnlyApp>;
    if (o?.store !== 'apple' && o?.store !== 'play') continue;
    const appId = typeof o.appId === 'string' ? o.appId.trim() : '';
    if (!(o.store === 'apple' ? APPLE_APP_ID : PACKAGE_NAME).test(appId) || out.some(a => a.store === o.store && a.appId === appId)) continue;
    out.push({ id: storeAppId(o.store, appId), store: o.store, appId, account: typeof o.account === 'string' && o.account ? o.account : null,
      name: typeof o.name === 'string' && o.name.trim() ? o.name : appId, bundleId: typeof o.bundleId === 'string' && o.bundleId ? o.bundleId : o.store === 'play' ? appId : null,
      added: typeof o.added === 'string' ? o.added : '', ...(parseIgnored(o.ignored).length ? { ignored: parseIgnored(o.ignored) } : {}) });
  }
  return out;
}

/** Parses the file's text; drops entries that are not well formed (an id, an absolute path). Pure. */
export function parseRegistry(text: string): Registry {
  let raw: unknown;
  try { raw = JSON.parse(text); } catch { return { version: 1, projects: [] }; }
  const list = (raw as { projects?: unknown })?.projects;
  const out: RegistryProject[] = [];
  if (Array.isArray(list)) for (const p of list) {
    const o = p as Partial<RegistryProject>;
    if (typeof o?.path !== 'string' || !o.path.startsWith('/') && !/^[A-Za-z]:[\\/]/.test(o.path)) continue;
    if (out.some(x => x.path === o.path)) continue;
    out.push({ id: typeof o.id === 'string' && ID.test(o.id) && !out.some(x => x.id === o.id) ? o.id : folderId(o.path), path: o.path,
      name: typeof o.name === 'string' && o.name.trim() ? o.name : basename(o.path), added: typeof o.added === 'string' ? o.added : '',
      ...(parseIgnored(o.ignored).length ? { ignored: parseIgnored(o.ignored) } : {}) });
  }
  const storeApps = parseStoreApps((raw as { storeApps?: unknown })?.storeApps);
  return storeApps.length ? { version: 1, projects: out, storeApps } : { version: 1, projects: out };
}

export function readRegistry(file = registryFile()): Registry {
  if (!existsSync(file)) return { version: 1, projects: [] };
  return parseRegistry(readFileSync(file, 'utf8'));
}

export function writeRegistry(r: Registry, file = registryFile()): void {
  mkdirSync(dirname(file), { recursive: true });
  if (existsSync(file)) {
    // a file this version cannot read is kept once instead of being replaced silently
    try { JSON.parse(readFileSync(file, 'utf8')); } catch { copyFileSync(file, `${file}.unreadable`); }
  }
  const tmp = `${file}.tmp-${process.pid}`;
  writeFileSync(tmp, JSON.stringify({ version: 1, projects: r.projects, ...(r.storeApps?.length ? { storeApps: r.storeApps } : {}) }, null, 2) + '\n');
  renameSync(tmp, file);
}

/** Adds a folder (by absolute path; the same path again only updates an empty name). Pure on the registry. */
export function withFolder(r: Registry, path: string, name: string | undefined, now: string): { registry: Registry; project: RegistryProject; added: boolean } {
  const abs = resolve(path);
  const have = r.projects.find(p => p.path === abs);
  if (have) return { registry: r, project: have, added: false };
  const project = { id: folderId(abs), path: abs, name: name?.trim() || configAppName(abs) || basename(abs), added: now };
  return { registry: { ...r, version: 1, projects: [...r.projects, project] }, project, added: true };
}

/** Adds a store-only app (the same store + app id again updates its account, name and bundle id). Pure. */
export function withStoreApp(r: Registry, a: { store: 'apple' | 'play'; appId: string; account?: string | null; name?: string; bundleId?: string | null }, now: string): { registry: Registry; app: StoreOnlyApp; added: boolean } {
  const appId = a.appId.trim();
  if (!(a.store === 'apple' ? APPLE_APP_ID : PACKAGE_NAME).test(appId)) throw new Error(a.store === 'apple' ? `--app-id ${appId}: the numeric Apple ID of the app (${consoleLink('asc.app-info')})` : `--app-id ${appId}: the Play package name (com.example.app)`);
  const list = r.storeApps ?? [];
  const have = list.find(x => x.store === a.store && x.appId === appId);
  const app: StoreOnlyApp = { id: storeAppId(a.store, appId), store: a.store, appId, account: a.account ?? have?.account ?? null, name: a.name?.trim() || have?.name || appId,
    bundleId: a.bundleId ?? have?.bundleId ?? (a.store === 'play' ? appId : null), added: have?.added ?? now, ...(have?.ignored?.length ? { ignored: have.ignored } : {}) };
  if (have && JSON.stringify(have) === JSON.stringify(app)) return { registry: r, app: have, added: false };
  return { registry: { ...r, version: 1, storeApps: [...list.filter(x => x !== have), app] }, app, added: !have };
}

/** Removes a store-only app by id or "<store>:<app id>". Pure. */
export function withoutStoreApp(r: Registry, key: string): { registry: Registry; removed: StoreOnlyApp | null } {
  const removed = (r.storeApps ?? []).find(x => x.id === key || `${x.store}:${x.appId}` === key) ?? null;
  if (!removed) return { registry: r, removed };
  const rest = (r.storeApps ?? []).filter(x => x !== removed);
  const { storeApps: _, ...base } = r;
  return { registry: rest.length ? { ...base, storeApps: rest } : base, removed };
}

// ---- ignore: dormant apps (whole app or one store side) ----

/** The store sides of an entry that are ignored. A store-only entry has one side: its store. */
export const ignoredStores = (e: RegistryProject | StoreOnlyApp): IgnoreStore[] => (e.ignored ?? []).filter(x => !('store' in e) || x === e.store);

/** Whether the entry is ignored on `store`, or (no store) entirely: every side it has. */
export function isIgnored(e: RegistryProject | StoreOnlyApp, store?: IgnoreStore): boolean {
  const have = ignoredStores(e);
  if (store) return have.includes(store);
  return 'store' in e ? have.length > 0 : IGNORE_STORES.every(x => have.includes(x));
}

type Found = { entry: RegistryProject | StoreOnlyApp; kind: 'project' | 'storeApp' };

/** Finds one entry by id, folder path, "<store>:<app id>" or (unique, case-insensitive) name. Throws when it is ambiguous. */
export function findEntry(r: Registry, key: string): Found | null {
  const all: Found[] = [...r.projects.map(entry => ({ entry, kind: 'project' as const })), ...(r.storeApps ?? []).map(entry => ({ entry, kind: 'storeApp' as const }))];
  const abs = ID.test(key) ? '' : resolve(key);
  const exact = all.filter(x => x.entry.id === key || ('path' in x.entry ? x.entry.path === abs : `${x.entry.store}:${x.entry.appId}` === key));
  if (exact.length === 1) return exact[0]!;
  const named = all.filter(x => x.entry.name.toLowerCase() === key.toLowerCase());
  if (named.length > 1) throw new Error(`"${key}" matches ${named.length} apps (${named.map(x => ('path' in x.entry ? x.entry.path : `${x.entry.store}:${x.entry.appId}`)).join(', ')}): use the id, folder or <store>:<app id>`);
  return named[0] ?? null;
}

/** Ignores (on) or restores one entry, on one store side or on all of it. Pure. */
export function withIgnore(r: Registry, key: string, store: IgnoreStore | undefined, on: boolean): { registry: Registry; entry: RegistryProject | StoreOnlyApp; changed: boolean } {
  const f = findEntry(r, key);
  if (!f) throw new Error(`${key}: not in the app list (storebound apps folders)`);
  if (store && !IGNORE_STORES.includes(store)) throw new Error('--store: apple or play');
  const only = f.kind === 'storeApp' ? (f.entry as StoreOnlyApp).store : null;
  if (only && store && store !== only) throw new Error(`${f.entry.name} is a ${only} app only: it has no ${store} side to ${on ? 'ignore' : 'restore'}`);
  const sides: IgnoreStore[] = only ? [only] : store ? [store] : IGNORE_STORES;
  const cur = f.entry.ignored ?? [];
  const next = IGNORE_STORES.filter(x => (on ? cur.includes(x) || sides.includes(x) : cur.includes(x) && !sides.includes(x)));
  if (next.join() === cur.join()) return { registry: r, entry: f.entry, changed: false };
  const { ignored: _drop, ...rest } = f.entry;
  const entry = { ...rest, ...(next.length ? { ignored: next } : {}) } as RegistryProject | StoreOnlyApp;
  const swap = <T extends RegistryProject | StoreOnlyApp>(list: T[]): T[] => list.map(x => (x === f.entry ? entry as T : x));
  return {
    registry: { ...r, projects: f.kind === 'project' ? swap(r.projects) : r.projects, ...(r.storeApps ? { storeApps: f.kind === 'storeApp' ? swap(r.storeApps) : r.storeApps } : {}) },
    entry, changed: true,
  };
}

export function setIgnore(key: string, store: IgnoreStore | undefined, on: boolean, file = registryFile()): { entry: RegistryProject | StoreOnlyApp; changed: boolean } {
  const { registry, entry, changed } = withIgnore(readRegistry(file), key, store, on);
  if (changed) writeRegistry(registry, file);
  return { entry, changed };
}

/** The folders that are not ignored on `store` (no store: not ignored at all). */
export const activeProjects = (r: Registry, store?: IgnoreStore): RegistryProject[] => r.projects.filter(p => !isIgnored(p, store));
/** The store-only apps that are not ignored. */
export const activeStoreApps = (r: Registry): StoreOnlyApp[] => (r.storeApps ?? []).filter(a => !isIgnored(a));

/** Store ids the config of a folder names (read as text, never run): Apple app ids / bundle ids and the Play package. */
export function configStoreIds(dir: string): { apple: string[]; play: string[] } {
  const out = { apple: [] as string[], play: [] as string[] };
  for (const n of ['storebound.config.ts', 'storebound.config.mts', 'storebound.config.js', 'storebound.config.mjs', 'storebound.config.json']) {
    let t: string;
    try { t = readFileSync(join(dir, n), 'utf8'); } catch { continue; }
    for (const m of t.matchAll(/\b(?:bundleId|appId)["']?\s*:\s*["'`]([A-Za-z0-9._-]+)["'`]/g)) out.apple.push(m[1]!);
    for (const m of t.matchAll(/\bpackageName["']?\s*:\s*["'`]([A-Za-z]\w*(?:\.[A-Za-z]\w*)+)["'`]/g)) out.play.push(m[1]!);
    break;
  }
  return out;
}

/** The store ids (Apple app ids and bundle ids, Play packages) of everything ignored on that store. */
export function ignoredStoreIds(r: Registry): { apple: Set<string>; play: Set<string> } {
  const o = { apple: new Set<string>(), play: new Set<string>() };
  for (const p of r.projects) {
    const ids = configStoreIds(p.path);
    for (const st of IGNORE_STORES) if (isIgnored(p, st)) for (const id of ids[st]) o[st].add(id);
  }
  for (const a of r.storeApps ?? []) if (isIgnored(a)) { o[a.store].add(a.appId); if (a.bundleId) o[a.store].add(a.bundleId); }
  return o;
}

export function addStoreApp(a: Parameters<typeof withStoreApp>[1], file = registryFile()): { app: StoreOnlyApp; added: boolean; changed: boolean } {
  const cur = readRegistry(file);
  const { registry, app, added } = withStoreApp(cur, a, new Date().toISOString());
  if (registry !== cur) writeRegistry(registry, file);
  return { app, added, changed: registry !== cur };
}

export function removeStoreApp(key: string, file = registryFile()): StoreOnlyApp | null {
  const { registry, removed } = withoutStoreApp(readRegistry(file), key);
  if (removed) writeRegistry(registry, file);
  return removed;
}

/** Removes a folder by path or id. Pure. */
export function withoutFolder(r: Registry, pathOrId: string): { registry: Registry; removed: RegistryProject | null } {
  const abs = ID.test(pathOrId) ? '' : resolve(pathOrId);
  const removed = r.projects.find(p => p.id === pathOrId || p.path === abs) ?? null;
  return { registry: removed ? { ...r, version: 1, projects: r.projects.filter(p => p !== removed) } : r, removed };
}

/** Reads, adds and writes (only when it changed). */
export function addFolder(path: string, name?: string, file = registryFile()): { project: RegistryProject; added: boolean } {
  const { registry, project, added } = withFolder(readRegistry(file), path, name, new Date().toISOString());
  if (added) writeRegistry(registry, file);
  return { project, added };
}

export function removeFolder(pathOrId: string, file = registryFile()): RegistryProject | null {
  const { registry, removed } = withoutFolder(readRegistry(file), pathOrId);
  if (removed) writeRegistry(registry, file);
  return removed;
}

/** The app name a storebound config gives (`app: { name: '...' }`), read as text (no config load), else null. */
export function configAppName(dir: string): string | null {
  for (const n of ['storebound.config.ts', 'storebound.config.mts', 'storebound.config.js', 'storebound.config.mjs']) {
    try {
      const text = readFileSync(join(dir, n), 'utf8');
      const m = /\bapp\s*:\s*\{[^}]*?\bname\s*:\s*(['"`])([^'"`]+)\1/s.exec(text);
      if (m) return m[2]!.trim();
    } catch { /* not this one */ }
  }
  return null;
}

/** Folders with a storebound config under the roots (depth 4; node_modules, .git and _arsiv skipped). */
export function configFolders(roots: string[], depth = 4): string[] {
  const out: string[] = [];
  const walk = (d: string, left: number) => {
    let names: string[] = [];
    try { names = readdirSync(d); } catch { return; }
    if (names.some(n => /^storebound\.config\.(ts|mts|js|mjs)$/.test(n))) out.push(d);
    if (left <= 0) return;
    for (const n of names) {
      if (n === 'node_modules' || n.startsWith('.') || n === '_arsiv') continue;
      const p = join(d, n);
      try { if (statSync(p).isDirectory()) walk(p, left - 1); } catch { /* unreadable */ }
    }
  };
  for (const r of roots) walk(r, depth);
  return [...new Set(out)];
}

/**
 * After a machine move the list keeps the old computer's paths ("folder not found"). For each missing folder: a
 * config folder under the roots whose last path parts match (some-game, Acme/frontend), else one whose app name is
 * the same as the entry's name. The id stays, so the desktop's per-app accounts and settings stay linked. Pure.
 */
export function relinkPlan(r: Registry, candidates: string[], exists: (p: string) => boolean, nameOf: (dir: string) => string | null): { id: string; name: string; from: string; to: string }[] {
  const parts = (p: string) => p.split(/[\\/]+/).filter(Boolean).map(x => x.toLowerCase());
  const taken = new Set(r.projects.filter(p => exists(p.path)).map(p => resolve(p.path).toLowerCase()));
  const plan: { id: string; name: string; from: string; to: string }[] = [];
  for (const p of r.projects) {
    if (exists(p.path)) continue;
    const want = parts(p.path);
    const free = candidates.filter(c => !taken.has(resolve(c).toLowerCase()));
    let best: string | undefined;
    for (const k of [3, 2, 1]) {
      const tail = want.slice(-k).join('/');
      best = free.find(c => parts(c).slice(-k).join('/') === tail);
      if (best) break;
    }
    best ??= free.find(c => nameOf(c)?.toLowerCase() === p.name.toLowerCase());
    if (best) { plan.push({ id: p.id, name: p.name, from: p.path, to: resolve(best) }); taken.add(resolve(best).toLowerCase()); }
  }
  return plan;
}

export function applyRelink(plan: { id: string; to: string }[], file = registryFile()): void {
  const r = readRegistry(file);
  for (const s of plan) { const p = r.projects.find(x => x.id === s.id); if (p) p.path = s.to; }
  writeRegistry(r, file);
}