/**
 * Idempotent seed. Safe to run on every environment, including production.
 *
 * It reconciles the *code-owned* parts of the schema — the permission catalog
 * and the system roles — with the database. It deliberately does NOT create
 * users: account provisioning belongs to the auth milestone, and baking a
 * default admin password into a repository is how stores get compromised.
 */
import { PrismaClient } from '@prisma/client';
import { ALL_PERMISSIONS, PERMISSIONS, SYSTEM_ROLES, type Permission } from '@sport/types';

import { seedCatalog } from './seed/catalog';

const prisma = new PrismaClient();

/** Which permissions each system role starts with. Editable later at runtime. */
const ROLE_DEFINITIONS: Record<string, { name: string; permissions: readonly Permission[] }> = {
  [SYSTEM_ROLES.SUPER_ADMIN]: {
    name: 'Super Admin',
    permissions: ALL_PERMISSIONS,
  },
  [SYSTEM_ROLES.ADMIN]: {
    name: 'Admin',
    permissions: ALL_PERMISSIONS.filter(
      (permission) =>
        permission !== PERMISSIONS.ROLE_MANAGE && permission !== PERMISSIONS.USER_MANAGE,
    ),
  },
  [SYSTEM_ROLES.CATALOG_MANAGER]: {
    name: 'Catalog Manager',
    permissions: [
      PERMISSIONS.PRODUCT_READ,
      PERMISSIONS.PRODUCT_CREATE,
      PERMISSIONS.PRODUCT_UPDATE,
      PERMISSIONS.PRODUCT_PUBLISH,
      PERMISSIONS.CATEGORY_READ,
      PERMISSIONS.CATEGORY_MANAGE,
      PERMISSIONS.COLLECTION_READ,
      PERMISSIONS.COLLECTION_MANAGE,
      PERMISSIONS.BRAND_READ,
      PERMISSIONS.BRAND_MANAGE,
      PERMISSIONS.INVENTORY_READ,
      PERMISSIONS.INVENTORY_UPDATE,
      PERMISSIONS.MEDIA_READ,
      PERMISSIONS.MEDIA_UPLOAD,
    ],
  },
  [SYSTEM_ROLES.ORDER_MANAGER]: {
    name: 'Order Manager',
    permissions: [
      PERMISSIONS.ORDER_READ,
      PERMISSIONS.ORDER_UPDATE,
      PERMISSIONS.ORDER_CANCEL,
      PERMISSIONS.PAYMENT_READ,
      PERMISSIONS.CUSTOMER_READ,
      PERMISSIONS.INVENTORY_READ,
      PERMISSIONS.PRODUCT_READ,
    ],
  },
  [SYSTEM_ROLES.SUPPORT_AGENT]: {
    name: 'Support Agent',
    permissions: [
      PERMISSIONS.ORDER_READ,
      PERMISSIONS.CUSTOMER_READ,
      PERMISSIONS.PRODUCT_READ,
      PERMISSIONS.REVIEW_MODERATE,
    ],
  },
  [SYSTEM_ROLES.CUSTOMER]: {
    name: 'Customer',
    permissions: [],
  },
};

async function seedPermissions(): Promise<Map<string, string>> {
  for (const key of ALL_PERMISSIONS) {
    const [resource = key, action = 'unknown'] = key.split('.');
    await prisma.permission.upsert({
      where: { key },
      update: { resource, action },
      create: { key, resource, action },
    });
  }

  // Anything in the table but no longer in the catalog is dead configuration.
  const removed = await prisma.permission.deleteMany({
    where: { key: { notIn: [...ALL_PERMISSIONS] } },
  });
  if (removed.count > 0) {
    console.log(`Removed ${removed.count} stale permission(s).`);
  }

  const rows = await prisma.permission.findMany({ select: { id: true, key: true } });
  return new Map(rows.map((row) => [row.key, row.id]));
}

async function seedRoles(permissionIds: Map<string, string>): Promise<void> {
  for (const [key, definition] of Object.entries(ROLE_DEFINITIONS)) {
    const role = await prisma.role.upsert({
      where: { key },
      update: { name: definition.name, isSystem: true },
      create: { key, name: definition.name, isSystem: true },
    });

    // Replace the grant set wholesale — the code definition wins for system roles.
    await prisma.rolePermission.deleteMany({ where: { roleId: role.id } });

    const grants = definition.permissions
      .map((permission) => permissionIds.get(permission))
      .filter((id): id is string => Boolean(id))
      .map((permissionId) => ({ roleId: role.id, permissionId }));

    if (grants.length > 0) {
      await prisma.rolePermission.createMany({ data: grants, skipDuplicates: true });
    }
  }
}

async function seedInventoryLocation(): Promise<void> {
  await prisma.inventoryLocation.upsert({
    where: { code: 'MAIN' },
    update: {},
    create: { code: 'MAIN', name: 'Main Warehouse', isDefault: true },
  });
}

async function main(): Promise<void> {
  const permissionIds = await seedPermissions();
  await seedRoles(permissionIds);
  await seedInventoryLocation();
  console.log(
    `Seed complete: ${permissionIds.size} permissions, ${Object.keys(ROLE_DEFINITIONS).length} roles.`,
  );

  // Demo catalog: development and staging only. Guarded twice — by NODE_ENV and
  // by an explicit opt-out — because sample products appearing in a production
  // storefront is the kind of mistake that reaches customers.
  const isProduction = process.env['NODE_ENV'] === 'production';
  const demoDisabled = process.env['SEED_DEMO'] === 'false';

  if (isProduction || demoDisabled) {
    console.log('Skipping demo catalog seed.');
    return;
  }

  await seedCatalog(prisma);
}

main()
  .catch((error: unknown) => {
    console.error(error);
    process.exitCode = 1;
  })
  .finally(() => {
    void prisma.$disconnect();
  });