// Seeds 10 demo firms, each with one owner user + realistic activity.
// Run from monorepo root: npx tsx scripts/seed-demo.ts
//
// Login: any of the emails below with password `Demo1234!`

import path from 'node:path';
import { fileURLToPath } from 'node:url';
import dotenv from 'dotenv';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
dotenv.config({ path: path.resolve(__dirname, '../.env') });

import argon2 from 'argon2';
import {
  getDb,
  getPool,
  firms,
  users,
  clients,
  cases,
  timeEntries,
  invoices,
  invoiceItems,
} from '@lawdesk/db';

// ─── Demo data pools ───────────────────────────────────────────────────────
const FIRMS = [
  { name: 'Hartwell & Associates',     plan: 'pro' as const,      area: 'Family Law' },
  { name: 'Brennan Law Group',         plan: 'lifetime' as const, area: 'Personal Injury' },
  { name: 'Cohen Legal Solutions',     plan: 'starter' as const,  area: 'Criminal Defense' },
  { name: 'Davenport & Reed PLLC',     plan: 'pro' as const,      area: 'Real Estate' },
  { name: 'Eastman Law Firm',          plan: 'starter' as const,  area: 'Employment' },
  { name: 'Fairmont Legal Partners',   plan: 'pro' as const,      area: 'Estate Planning' },
  { name: 'Gallo & Whitfield LLP',     plan: 'lifetime' as const, area: 'Corporate' },
  { name: 'Hayes Immigration Law',     plan: 'starter' as const,  area: 'Immigration' },
  { name: 'Iverson & Marsh',           plan: 'pro' as const,      area: 'Bankruptcy' },
  { name: 'Jensen Tax Law',            plan: 'pro' as const,      area: 'Tax' },
];

const FIRST_NAMES = ['Emma', 'Liam', 'Olivia', 'Noah', 'Ava', 'Ethan', 'Sophia', 'Mason', 'Isabella', 'James', 'Mia', 'Lucas', 'Charlotte', 'Henry', 'Amelia'];
const LAST_NAMES  = ['Anderson', 'Brown', 'Carter', 'Davis', 'Evans', 'Foster', 'Garcia', 'Hill', 'Jackson', 'King', 'Lee', 'Morris', 'Nelson', 'Owens', 'Parker', 'Quinn', 'Rivera', 'Stone', 'Taylor', 'Walker'];

const CASE_TITLES: Record<string, string[]> = {
  'Family Law':         ['Divorce — assets division', 'Child custody modification', 'Prenuptial agreement', 'Adoption petition', 'Spousal support'],
  'Personal Injury':    ['Auto accident — rear-end', 'Slip and fall at retail', 'Workplace injury claim', 'Medical malpractice', 'Product liability'],
  'Criminal Defense':   ['DUI defense', 'Assault charge', 'Drug possession', 'White-collar fraud', 'Theft defense'],
  'Real Estate':        ['Commercial lease review', 'Title dispute', 'Zoning variance', 'Purchase agreement', 'Easement dispute'],
  'Employment':         ['Wrongful termination', 'Discrimination claim', 'Wage and hour dispute', 'Non-compete enforcement', 'Severance negotiation'],
  'Estate Planning':    ['Trust formation', 'Will drafting', 'Probate administration', 'Power of attorney', 'Estate dispute'],
  'Corporate':          ['M&A advisory', 'Shareholder agreement', 'Series A financing', 'IP licensing', 'Corporate restructuring'],
  'Immigration':        ['H-1B visa petition', 'Green card application', 'Asylum case', 'Naturalization', 'Family-based visa'],
  'Bankruptcy':         ['Chapter 7 filing', 'Chapter 13 reorganization', 'Creditor negotiation', 'Asset protection', 'Discharge defense'],
  'Tax':                ['IRS audit defense', 'Tax debt settlement', 'Estate tax planning', 'Business tax structuring', 'Tax court appeal'],
};

const TIME_DESCRIPTIONS = [
  'Initial client consultation',
  'Drafted demand letter',
  'Reviewed discovery documents',
  'Court appearance — motion hearing',
  'Phone call with opposing counsel',
  'Research case law',
  'Prepared deposition outline',
  'Client meeting — strategy review',
  'Email correspondence',
  'Filed motion to compel',
  'Mediation session',
  'Drafted settlement proposal',
  'Reviewed contract terms',
  'Prepared trial exhibits',
  'Settlement conference',
];

// ─── Helpers ────────────────────────────────────────────────────────────────
function pick<T>(arr: T[]): T {
  return arr[Math.floor(Math.random() * arr.length)]!;
}

function randInt(min: number, max: number): number {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function daysAgo(days: number): Date {
  const d = new Date();
  d.setDate(d.getDate() - days);
  return d;
}

function slug(s: string): string {
  return s.toLowerCase().replace(/[^a-z]+/g, '');
}

// ─── Safety guard ─────────────────────────────────────────────────────────────
// This inserts 10 demo firms whose owner logins all use the public password `Demo1234!`
// into whatever DATABASE_URL points at — which for this project is the PRODUCTION database.
// Require an explicit opt-in so it can never run by accident.
if (process.env.ALLOW_SEED !== '1') {
  const host = (() => {
    try {
      return new URL(process.env.DATABASE_URL ?? '').host || 'unknown';
    } catch {
      return 'unknown';
    }
  })();
  console.error(
    `Refusing to seed. This writes 10 demo firms (owner password "Demo1234!") to: ${host}\n` +
      'That is the production database for this project. Re-run with ALLOW_SEED=1 only if you are sure:\n' +
      '  ALLOW_SEED=1 npx tsx scripts/seed-demo.ts',
  );
  process.exit(1);
}

// ─── Main ───────────────────────────────────────────────────────────────────
async function main() {
  const db = getDb();
  const passwordHash = await argon2.hash('Demo1234!', {
    type: argon2.argon2id,
    memoryCost: 64 * 1024,
    timeCost: 3,
    parallelism: 1,
  });

  console.log('Seeding 10 firms with activity…\n');

  for (let i = 0; i < FIRMS.length; i++) {
    const def = FIRMS[i]!;
    const firstName = FIRST_NAMES[i]!;
    const lastName  = LAST_NAMES[i]!;
    const fullName  = `${firstName} ${lastName}`;
    const email     = `${firstName.toLowerCase()}.${lastName.toLowerCase()}@${slug(def.name)}.test`;

    // Firm
    const [firm] = await db.insert(firms).values({
      name: def.name,
      plan: def.plan,
      watermarkEnabled: def.plan === 'starter',
    }).returning();

    // Owner user
    const [user] = await db.insert(users).values({
      firmId: firm.id,
      email,
      passwordHash,
      fullName,
      role: 'owner',
      emailVerifiedAt: new Date(),
      lastSeenAt: daysAgo(randInt(0, 5)),
    }).returning();

    // 3–5 clients
    const numClients = randInt(3, 5);
    const clientRows = [];
    for (let c = 0; c < numClients; c++) {
      const cName = `${pick(FIRST_NAMES)} ${pick(LAST_NAMES)}`;
      const [client] = await db.insert(clients).values({
        firmId: firm.id,
        name: cName,
        email: `${cName.toLowerCase().replace(' ', '.')}@example.com`,
        phone: `(${randInt(200, 999)}) ${randInt(200, 999)}-${randInt(1000, 9999)}`,
      }).returning();
      clientRows.push(client);
    }

    // 5–8 cases
    const numCases = randInt(5, 8);
    const caseTitles = CASE_TITLES[def.area]!;
    const caseRows = [];
    for (let cc = 0; cc < numCases; cc++) {
      const status = cc < numCases - 2 ? 'open' : (Math.random() > 0.5 ? 'pending' : 'closed');
      const hourlyRate = randInt(150, 450);
      const openedDaysAgo = randInt(7, 120);
      const [kase] = await db.insert(cases).values({
        firmId: firm.id,
        clientId: pick(clientRows).id,
        title: caseTitles[cc % caseTitles.length]!,
        caseNumber: `${new Date().getFullYear()}-${String(cc + 1).padStart(4, '0')}`,
        status,
        practiceArea: def.area,
        hourlyRate: String(hourlyRate),
        openedAt: daysAgo(openedDaysAgo),
        closedAt: status === 'closed' ? daysAgo(randInt(0, openedDaysAgo - 1)) : null,
      }).returning();
      caseRows.push(kase);
    }

    // 15–30 time entries spread across cases
    const numEntries = randInt(15, 30);
    for (let e = 0; e < numEntries; e++) {
      const kase = pick(caseRows);
      const minutes = randInt(15, 240);
      const startedDaysAgo = randInt(0, 60);
      const startedAt = daysAgo(startedDaysAgo);
      const endedAt = new Date(startedAt.getTime() + minutes * 60 * 1000);
      await db.insert(timeEntries).values({
        firmId: firm.id,
        caseId: kase.id,
        userId: user.id,
        description: pick(TIME_DESCRIPTIONS),
        startedAt,
        endedAt,
        minutes,
        rate: kase.hourlyRate ?? '250',
        billable: Math.random() > 0.15,
      });
    }

    // 2–4 invoices
    const numInvoices = randInt(2, 4);
    for (let inv = 0; inv < numInvoices; inv++) {
      const kase = pick(caseRows);
      const client = clientRows.find((c) => c.id === kase.clientId)!;
      const numItems = randInt(2, 5);
      const items = [];
      let subtotal = 0;
      for (let it = 0; it < numItems; it++) {
        const qty = Number((Math.random() * 8 + 0.5).toFixed(2));
        const rate = Number(kase.hourlyRate ?? 250);
        const amount = Number((qty * rate).toFixed(2));
        subtotal += amount;
        items.push({ description: pick(TIME_DESCRIPTIONS), quantity: qty, rate, amount, sortOrder: it });
      }
      const total = Number(subtotal.toFixed(2));

      // Status mix: ~40% sent, ~25% paid, ~15% overdue, ~15% draft, ~5% void
      const r = Math.random();
      const status = r < 0.4 ? 'sent' : r < 0.65 ? 'paid' : r < 0.8 ? 'overdue' : r < 0.95 ? 'draft' : 'void';
      const issuedDaysAgo = randInt(5, 90);
      const issuedAt = status === 'draft' ? null : daysAgo(issuedDaysAgo);
      const dueAt = issuedAt ? new Date(issuedAt.getTime() + 30 * 24 * 60 * 60 * 1000) : null;
      const paidAt = status === 'paid' ? daysAgo(randInt(1, issuedDaysAgo - 1)) : null;

      const [invoice] = await db.insert(invoices).values({
        firmId: firm.id,
        clientId: client.id,
        caseId: kase.id,
        number: `INV-${new Date().getFullYear()}-${String(inv + 1 + i * 10).padStart(4, '0')}`,
        status,
        subtotal: subtotal.toFixed(2),
        taxRate: '0',
        total: total.toFixed(2),
        issuedAt,
        dueAt,
        paidAt,
      }).returning();

      for (const it of items) {
        await db.insert(invoiceItems).values({
          invoiceId: invoice.id,
          description: it.description,
          quantity: String(it.quantity),
          rate: String(it.rate),
          amount: String(it.amount),
          sortOrder: it.sortOrder,
        });
      }
    }

    console.log(`  ✓ ${def.name.padEnd(32)} — ${email}  (${def.plan})`);
  }

  console.log('\nDone. All 10 users use password: Demo1234!');
  await getPool().end();
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});