/**
 * Seed Khanegi defaultSnapshot from current appUiConfig (or color-built UI).
 * Optionally restore current appearance to that snapshot (--restore).
 *
 * Usage:
 *   npx ts-node --transpile-only prisma/seed-khanegi-default-snapshots.ts
 *   npx ts-node --transpile-only prisma/seed-khanegi-default-snapshots.ts --restore
 *   npx ts-node --transpile-only prisma/seed-khanegi-default-snapshots.ts --restore --domain=example.ir
 */
import * as fs from 'fs';
import * as path from 'path';
import { PrismaClient, ProductType } from '@prisma/client';
import { buildKhanegiUiFromColors } from './lib/appearance-builders';

const prisma = new PrismaClient();

type SourceUser = {
  id: number;
  domain?: string | null;
  domains?: string | string[] | null;
  api_origin?: string | null;
  color?: string | null;
  secondary_color?: string | null;
  background_color?: string | null;
  app_ui_config?: unknown;
  deleted_at?: string | null;
};

function parseArgs() {
  const restore = process.argv.includes('--restore');
  const domainArg = process.argv.find((a) => a.startsWith('--domain='));
  const domain = domainArg ? domainArg.slice('--domain='.length).trim().toLowerCase() : null;
  return { restore, domain };
}

function parseDomains(raw: SourceUser['domains']): string[] {
  if (!raw) return [];
  try {
    const value = typeof raw === 'string' ? JSON.parse(raw) : raw;
    if (!Array.isArray(value)) return [];
    return value
      .map((item) => String(item).trim().toLowerCase())
      .filter(Boolean)
      .map((item) => item.replace(/^https?:\/\//, '').split('/')[0]);
  } catch {
    return [];
  }
}

function primaryDomain(row: SourceUser): string | null {
  const fromField = row.domain?.trim().toLowerCase();
  if (fromField) return fromField.replace(/^https?:\/\//, '').split('/')[0];
  const fromOrigin = row.api_origin?.trim().toLowerCase();
  if (fromOrigin) return fromOrigin.replace(/^https?:\/\//, '').split('/')[0];
  return parseDomains(row.domains)[0] || null;
}

function cloneSnap(ui: any) {
  return {
    app: JSON.parse(JSON.stringify(ui.app)),
    pages: JSON.parse(JSON.stringify(ui.pages || {})),
  };
}

function stripMeta(ui: any) {
  if (!ui || typeof ui !== 'object') return ui;
  const { defaultSnapshot: _s, _backfill, ...rest } = ui;
  return rest;
}

async function main() {
  const { restore, domain: onlyDomain } = parseArgs();
  const file = path.join(__dirname, 'data', 'users.json');
  const byDomain = new Map<string, SourceUser>();

  if (fs.existsSync(file)) {
    const rows = JSON.parse(fs.readFileSync(file, 'utf8')) as SourceUser[];
    for (const row of rows) {
      if (row.deleted_at) continue;
      const d = primaryDomain(row);
      if (d && !byDomain.has(d)) byDomain.set(d, row);
      for (const extra of parseDomains(row.domains)) {
        if (!byDomain.has(extra)) byDomain.set(extra, row);
      }
    }
  }

  const tenants = await prisma.tenant.findMany({
    where: { product: ProductType.khanegi },
  });

  const filtered = onlyDomain
    ? tenants.filter((tenant) => {
        const keys = [
          tenant.domain?.toLowerCase(),
          ...((Array.isArray(tenant.domains) ? tenant.domains : []) as string[]).map((d) =>
            String(d).toLowerCase(),
          ),
        ];
        return keys.includes(onlyDomain);
      })
    : tenants;

  let updated = 0;
  let restored = 0;
  let skipped = 0;

  for (const tenant of filtered) {
    const domainKeys = [
      tenant.domain?.toLowerCase(),
      ...((Array.isArray(tenant.domains) ? tenant.domains : []) as string[]).map((d) =>
        String(d).toLowerCase(),
      ),
    ].filter(Boolean) as string[];

    const source = domainKeys.map((d) => byDomain.get(d)).find(Boolean) || null;

    const existing =
      tenant.appUiConfig && typeof tenant.appUiConfig === 'object'
        ? (tenant.appUiConfig as Record<string, any>)
        : null;

    const fromRegistry =
      source?.app_ui_config &&
      typeof source.app_ui_config === 'object' &&
      ((source.app_ui_config as any).schemaId === 'ui-config' || (source.app_ui_config as any).app)
        ? (source.app_ui_config as Record<string, any>)
        : null;

    const built =
      existing && (existing.schemaId === 'ui-config' || existing.app)
        ? existing
        : buildKhanegiUiFromColors({
            primary: source?.color || tenant.primaryColor,
            secondary: source?.secondary_color || tenant.secondaryColor,
            background: source?.background_color || tenant.backgroundColor,
            existing: source?.app_ui_config,
          });

    // Factory look: never overwrite existing snapshot; else registry JSON, else current UI
    const keepSnapshot =
      existing?.defaultSnapshot && typeof existing.defaultSnapshot === 'object'
        ? existing.defaultSnapshot
        : fromRegistry
          ? cloneSnap(fromRegistry)
          : cloneSnap(built);

    const nextUi = restore
      ? {
          ...stripMeta(built),
          schemaId: built.schemaId || 'ui-config',
          version: built.version || '1.0.0',
          app: JSON.parse(JSON.stringify(keepSnapshot.app)),
          pages: JSON.parse(JSON.stringify(keepSnapshot.pages || {})),
          defaultSnapshot: keepSnapshot,
        }
      : {
          ...stripMeta(built),
          defaultSnapshot: keepSnapshot,
        };

    const unchanged =
      JSON.stringify(existing) === JSON.stringify(nextUi) && !restore;
    if (unchanged) {
      skipped += 1;
      continue;
    }

    const colors = nextUi.app?.theme?.colors || {};
    await prisma.tenant.update({
      where: { id: tenant.id },
      data: {
        appUiConfig: nextUi as any,
        ...(restore
          ? {
              primaryColor: colors.primary ?? tenant.primaryColor,
              secondaryColor: colors.secondary ?? tenant.secondaryColor,
              backgroundColor: colors.background ?? tenant.backgroundColor,
            }
          : {}),
      },
    });

    updated += 1;
    if (restore) restored += 1;
    console.log(`${restore ? 'restored' : 'seeded'}: ${tenant.domain}`);
  }

  console.log({
    tenants: filtered.length,
    updated,
    restored,
    skipped,
    restore,
    domain: onlyDomain,
  });
}

main()
  .catch((err) => {
    console.error(err);
    process.exitCode = 1;
  })
  .finally(async () => {
    await prisma.$disconnect();
  });