// services/tenantInviteService.ts
// Handle tenant invite creation and updates

import { and, eq, ilike } from "drizzle-orm";
import { db } from "../db/db.ts";
import { tenant_invites } from "../db/schema.ts";
import type { TenantInvite } from "../db/interfaces.ts";

function parseInviteEmails(rawEmails?: string | null) {
  if (!rawEmails) return [];
  try {
    const parsed = JSON.parse(rawEmails);
    if (!Array.isArray(parsed)) return [];
    return parsed.filter((entry) => typeof entry === "string");
  } catch {
    return rawEmails.split(/[\n,]+/)
      .map((entry) => entry.trim())
      .filter(Boolean);
  }
}

function normalizeInviteEmail(email: string) {
  return email.trim().toLowerCase();
}

function hasMatchingInviteEmail(
  invite: TenantInvite,
  normalizedEmail: string,
) {
  const emails = parseInviteEmails(invite.invited_emails);
  return emails.some((email) => email.toLowerCase() === normalizedEmail);
}

export async function createTenantInvite(
  landlordId: string,
  propertyId: string,
  options: {
    availableOn?: number | null;
    invitedEmails?: string[];
  } = {},
) {
  const existing = await db.select().from(tenant_invites).where(
    and(
      eq(tenant_invites.landlord_id, landlordId),
      eq(tenant_invites.property_id, propertyId),
    ),
  );
  if (existing.length > 0) {
    return existing;
  }
  const now = Date.now();
  const invitedEmails = options.invitedEmails ?? [];
  return await db.insert(tenant_invites).values({
    id: crypto.randomUUID(),
    landlord_id: landlordId,
    property_id: propertyId,
    available_on: options.availableOn ?? null,
    invited_emails: JSON.stringify(
      invitedEmails.map((e) => String(e).trim()).filter(Boolean),
    ),
    created_on: now,
    updated_on: now,
  }).returning();
}

export async function getTenantInviteById(
  inviteId: string,
): Promise<TenantInvite | null> {
  const result = await db.select().from(tenant_invites).where(
    eq(tenant_invites.id, inviteId),
  );
  return result[0] || null;
}

export async function getTenantInviteByProperty(
  landlordId: string,
  propertyId: string,
): Promise<TenantInvite | null> {
  const result = await db.select().from(tenant_invites).where(
    and(
      eq(tenant_invites.property_id, propertyId),
      eq(tenant_invites.landlord_id, landlordId),
    ),
  );
  return result[0] || null;
}

export async function updateTenantInvite(
  inviteId: string,
  updates: Partial<TenantInvite>,
) {
  const now = Date.now();
  return await db.update(tenant_invites)
    .set({ ...updates, updated_on: now })
    .where(eq(tenant_invites.id, inviteId))
    .returning();
}

/** Extract plain email from "Display Name <email@example.com>" or return trimmed input. */
function toPlainEmail(email: string): string {
  const trimmed = email.trim();
  const match = trimmed.match(/<([^>]+)>/);
  return (match ? match[1].trim() : trimmed).toLowerCase();
}

export async function getTenantInvitesByEmail(email: string) {
  
  const normalizedEmail = toPlainEmail(email);
  
  if (!normalizedEmail) {
    
    return [];
  }
  // ILIKE substring match then exact filter (handles JSON array and comma-separated stored format).
  const pattern = `%${normalizedEmail}%`;
  const result = await db.select().from(tenant_invites).where(
    ilike(tenant_invites.invited_emails, pattern),
  );
  return result.filter((invite) => {
    
    return hasMatchingInviteEmail(invite, normalizedEmail);
  });
}

export async function removeTenantInviteEmail(inviteId: string, email: string) {
  const normalizedEmail = normalizeInviteEmail(email);
  if (!normalizedEmail) {
    return { removed: false, invite: null };
  }
  const invite = await getTenantInviteById(inviteId);
  if (!invite) return { removed: false, invite: null };

  const existingEmails = parseInviteEmails(invite.invited_emails);
  const filteredEmails = existingEmails.filter((entry) =>
    entry.toLowerCase() !== normalizedEmail
  );
  if (filteredEmails.length === existingEmails.length) {
    return { removed: false, invite };
  }
  const updated = await updateTenantInvite(inviteId, {
    invited_emails: JSON.stringify(filteredEmails),
  });
  return { removed: true, invite: updated[0] ?? invite };
}