import * as fs from 'fs';
import * as path from 'path';
import { Prisma, PrismaClient, ProductType } from '@prisma/client';

const prisma = new PrismaClient();

type SourceUser = {
  id: number;
  name: string;
  name_fa: string;
  number?: string | null;
  avatar?: string | null;
  domains?: string | string[] | null;
  node_server?: string | null;
  node_ws?: string | null;
  color?: string | null;
  secondary_color?: string | null;
  background_color?: string | null;
  domain?: string | null;
  version?: string | null;
  app_ui_config?: unknown;
  deleted_at?: string | null;
  mode?: string | null;
};

/** Manual product corrections from SuperAdmin review */
const FORCE_KHANEGI: Array<{ domain?: string; name?: string; externalId?: number }> = [
  { domain: 'abshodehtabatabaei.ir' },
  { domain: 'boursemes.com' },
  { domain: 'abaeigold.ir' },
  { domain: 'niazitala.ir' },
  { domain: 'garoosigholaktala.ir' },
  // Khanegi newTheme (userTheme front) — NOT modular, NOT Hamkar.
  // Keep uiVariant=newTheme in DB; see prisma/khanegi-variant-locks.ts
  { domain: 'new.gholaktala.ir' },
  { domain: 'kh.kashkolgold.ir' },
  { domain: 'goldsun.zaarbox.ir' },
  { domain: 'goldaliii.com' },
];

/** Manual Hamkar locks — never put Khanegi domains here. */
const FORCE_HAMKAR: Array<{ domain?: string; name?: string; externalId?: number }> = [];

/** Canonical public domains after migrations */
const DOMAIN_OVERRIDES: Record<string, { domain: string; appUrl: string; nodeServer: string }> = {
  '24gold.app': {
    domain: '24gold.ir',
    appUrl: 'https://24gold.ir',
    nodeServer: 'https://24gold.ir/server',
  },
  'liman.gold': {
    domain: 'limangold.ir',
    appUrl: 'https://limangold.ir',
    nodeServer: 'https://limangold.ir/server',
  },
  'hamkar2.vahid.gold': {
    domain: 'vahid.gold',
    appUrl: 'https://vahid.gold',
    nodeServer: 'https://vahid.gold/server',
  },
};

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 isIp(host: string) {
  return /^\d{1,3}(\.\d{1,3}){3}$/.test(host);
}

function hostFromUrl(url?: string | null) {
  if (!url) return '';
  return url
    .trim()
    .toLowerCase()
    .replace(/^https?:\/\//, '')
    .split('/')[0]
    .split(':')[0];
}

function classifyProduct(row: SourceUser, domains: string[]): {
  product: Exclude<ProductType, 'other'>;
  confident: boolean;
  reason: string;
} {
  const forcedHamkar = FORCE_HAMKAR.find((item) => {
    if (item.externalId && item.externalId === row.id) return true;
    if (item.domain && domains.includes(item.domain)) return true;
    return false;
  });
  if (forcedHamkar) {
    return {
      product: 'hamkar',
      confident: true,
      reason: `manual override hamkar (${forcedHamkar.domain || forcedHamkar.externalId})`,
    };
  }

  const forced = FORCE_KHANEGI.find((item) => {
    if (item.externalId && item.externalId === row.id) return true;
    if (item.domain && domains.includes(item.domain)) return true;
    return false;
  });
  if (forced) {
    return {
      product: 'khanegi',
      confident: true,
      reason: `manual override khanegi (${forced.domain || forced.externalId})`,
    };
  }

  if (domains.some((d) => d.startsWith('app.'))) {
    return { product: 'khanegi', confident: true, reason: 'domain starts with app.' };
  }
  if (domains.some((d) => d.startsWith('khanegi.'))) {
    return { product: 'khanegi', confident: true, reason: 'domain starts with khanegi.' };
  }
  if (domains.some((d) => d.startsWith('hamkar.'))) {
    return { product: 'hamkar', confident: true, reason: 'domain starts with hamkar.' };
  }

  const nodeHost = hostFromUrl(row.node_server);
  if (nodeHost.startsWith('app.')) {
    return {
      product: 'khanegi',
      confident: true,
      reason: 'node_server host starts with app.',
    };
  }

  // Fallback guess — flagged for manual review
  if (row.app_ui_config) {
    return {
      product: 'khanegi',
      confident: false,
      reason: 'has app_ui_config but no app./hamkar. domain',
    };
  }

  return {
    product: 'hamkar',
    confident: false,
    reason: 'no app./hamkar. domain — defaulted to hamkar',
  };
}

function pickDomain(product: ProductType, domains: string[], row: SourceUser) {
  for (const domain of domains) {
    if (DOMAIN_OVERRIDES[domain]) return DOMAIN_OVERRIDES[domain].domain;
  }

  const preferredPrefix = product === 'khanegi' ? 'app.' : 'hamkar.';
  const preferred = domains.find((d) => d.startsWith(preferredPrefix));
  if (preferred) return preferred;

  const nonIp = domains.find((d) => !isIp(d));
  if (nonIp) return nonIp;

  const fromNode = hostFromUrl(row.node_server);
  if (fromNode && !isIp(fromNode)) return fromNode;

  if (row.domain) return String(row.domain).toLowerCase();
  return domains[0] || `${slugify(row.name)}.local`;
}

function slugify(value: string) {
  return value
    .trim()
    .toLowerCase()
    .replace(/\s+/g, '-')
    .replace(/[^a-z0-9._-]/g, '')
    .replace(/\.+/g, '-')
    .replace(/-+/g, '-')
    .replace(/^-|-$/g, '') || 'tenant';
}

function avatarUrl(raw?: string | null) {
  if (!raw) return null;
  if (/^https?:\/\//i.test(raw)) return raw;
  return null;
}

function asUiConfig(value: unknown): Prisma.InputJsonValue | undefined {
  if (value == null) return undefined;
  if (typeof value === 'string') {
    try {
      return JSON.parse(value) as Prisma.InputJsonValue;
    } catch {
      return undefined;
    }
  }
  if (typeof value === 'object') return value as Prisma.InputJsonValue;
  return undefined;
}

async function uniqueSlug(base: string, product: ProductType, externalId: number) {
  const candidates = [
    base,
    `${base}-${product}`,
    `${base}-${product}-${externalId}`,
    `${base}-${externalId}`,
  ];
  for (const slug of candidates) {
    const existing = await prisma.tenant.findUnique({ where: { slug } });
    if (!existing) return slug;
    // allow overwrite of previously imported same external id via notes marker
    if (existing.notes?.includes(`externalId:${externalId}`)) return slug;
  }
  return `${base}-${product}-${externalId}-${Date.now()}`;
}

async function uniqueDomain(preferred: string, externalId: number) {
  const candidates = [
    preferred,
    `${productSafeHost(preferred)}`,
    `id${externalId}.${preferred}`,
    `ext-${externalId}.${preferred}`,
  ];
  for (const domain of candidates) {
    const existing = await prisma.tenant.findUnique({ where: { domain } });
    if (!existing) return domain;
    if (existing.notes?.includes(`externalId:${externalId}`)) return domain;
  }
  return `ext-${externalId}-${Date.now()}.local`;
}

function productSafeHost(host: string) {
  return host;
}

async function main() {
  const file = path.join(__dirname, 'data', 'users.json');
  if (!fs.existsSync(file)) {
    throw new Error(`File not found: ${file}`);
  }

  const rows = JSON.parse(fs.readFileSync(file, 'utf8')) as SourceUser[];
  const summary = {
    total: rows.length,
    imported: 0,
    skippedDeleted: 0,
    hamkar: 0,
    khanegi: 0,
    uncertain: 0,
    withUiConfig: 0,
  };

  for (const row of rows) {
    if (row.deleted_at) {
      summary.skippedDeleted += 1;
      continue;
    }

    const domains = parseDomains(row.domains);
    const { product, confident, reason } = classifyProduct(row, domains);
    const baseSlug = slugify(row.name);
    const slug = await uniqueSlug(baseSlug, product, row.id);
    const preferredDomain = pickDomain(product, domains, row);
    const domain = await uniqueDomain(preferredDomain, row.id);
    const ui = asUiConfig(row.app_ui_config);
    const domainOverride =
      DOMAIN_OVERRIDES[domain] ||
      domains.map((d) => DOMAIN_OVERRIDES[d]).find(Boolean);

    const notes = [
      `externalId:${row.id}`,
      `import:users.json`,
      `classify:${reason}`,
      confident ? 'classifyConfidence:high' : 'classifyConfidence:low',
      row.number ? `phone:${row.number}` : null,
      row.version ? `version:${row.version}` : null,
      row.mode ? `mode:${row.mode}` : null,
    ]
      .filter(Boolean)
      .join(' | ');

    const data = {
      product,
      slug,
      nameFa: (row.name_fa || row.name).replace(/\s+/g, ' ').trim(),
      nameEn: row.name,
      domain: domainOverride?.domain || domain,
      domains: domains as unknown as Prisma.InputJsonValue,
      avatarUrl: avatarUrl(row.avatar),
      primaryColor: row.color || (product === 'hamkar' ? '#20c997' : '#ffb84d'),
      secondaryColor: row.secondary_color || null,
      backgroundColor: row.background_color || '#ffffff',
      nodeServer:
        domainOverride?.nodeServer || row.node_server || `https://${domain}/server`,
      nodeWs: row.node_ws || null,
      appUrl:
        domainOverride?.appUrl || domains.find((d) => !isIp(d)) || domain,
      adminUrl: null as string | null,
      appUiConfig: ui,
      appVersion: String(row.version || '1').trim() || '1',
      isActive: true,
      notes,
    };

    const existingByNotes = await prisma.tenant.findFirst({
      where: { notes: { contains: `externalId:${row.id}` } },
    });

    if (existingByNotes) {
      await prisma.tenant.update({
        where: { id: existingByNotes.id },
        data,
      });
    } else {
      // Prefer update by slug if this is a known seed like bakhtargold
      const bySlug = await prisma.tenant.findUnique({ where: { slug } });
      if (bySlug) {
        await prisma.tenant.update({ where: { id: bySlug.id }, data });
      } else {
        await prisma.tenant.create({ data });
      }
    }

    summary.imported += 1;
    summary[product] += 1;
    if (!confident) summary.uncertain += 1;
    if (ui) summary.withUiConfig += 1;
  }

  console.log('Import finished:', summary);
}

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