// services/leaseDocumentService.ts
// Handle lease documents, templates, and e-signature workflow

import { and, eq } from "drizzle-orm";
import { db } from "../db/db.ts";
import { lease_documents } from "../db/schema.ts";

// export interface LeaseDocument {
//   id: string;
//   lease_id: string;
//   document_type: string | null; // 'lease', 'addendum', 'receipt'
//   file_url: string | null;
//   file_name: string | null;
//   signed_by_landlord: boolean | null;
//   signed_by_tenant: boolean | null;
//   signature_date: number | null;
//   created_on: number;
// }

// Create new lease document
export async function createLeaseDocument(
  lease_id: string,
  document_type: string,
  file_url: string,
  file_name: string,
) {
  const now = Date.now();
  return await db.insert(lease_documents)
    .values({
      id: crypto.randomUUID(),
      lease_id,
      document_type,
      file_url,
      file_name,
      signed_by_landlord: false,
      signed_by_tenant: false,
      signature_date: null,
      created_on: now,
    })
    .returning();
}

// Get all documents for a lease
export async function getDocumentsByLease(lease_id: string) {
  return await db.select()
    .from(lease_documents)
    .where(eq(lease_documents.lease_id, lease_id));
}

// Get documents by type for a lease
export async function getDocumentsByLeaseAndType(
  lease_id: string,
  document_type: string,
) {
  return await db.select()
    .from(lease_documents)
    .where(and(
      eq(lease_documents.lease_id, lease_id),
      eq(lease_documents.document_type, document_type),
    ));
}

// Get main lease document
export async function getMainLeaseDocument(lease_id: string) {
  const result = await getDocumentsByLeaseAndType(lease_id, "lease");
  return result[0] || null;
}

// Update landlord signature
export async function signDocumentAsLandlord(id: string) {
  const now = Date.now();
  return await db.update(lease_documents)
    .set({
      signed_by_landlord: true,
      signature_date: now,
    })
    .where(eq(lease_documents.id, id))
    .returning();
}

// Update tenant signature
export async function signDocumentAsTenant(id: string) {
  const now = Date.now();
  const document = await getDocumentById(id);

  return await db.update(lease_documents)
    .set({
      signed_by_tenant: true,
      // Only update signature_date if landlord hasn't signed yet, or if both are signing
      signature_date: document?.signed_by_landlord
        ? now
        : (document?.signature_date || now),
    })
    .where(eq(lease_documents.id, id))
    .returning();
}

// Get document by ID
export async function getDocumentById(id: string) {
  const result = await db.select()
    .from(lease_documents)
    .where(eq(lease_documents.id, id));
  return result[0] || null;
}

// Check if document is fully signed
export async function isDocumentFullySigned(id: string) {
  const document = await getDocumentById(id);
  return document?.signed_by_landlord && document?.signed_by_tenant;
}

// Get signing status for a lease
export async function getLeaseSigningStatus(lease_id: string) {
  const documents = await getDocumentsByLease(lease_id);
  const mainLease = documents.find((doc) => doc.document_type === "lease");

  if (!mainLease) {
    return {
      has_lease_document: false,
      landlord_signed: false,
      tenant_signed: false,
      fully_signed: false,
      signature_date: null,
    };
  }

  return {
    has_lease_document: true,
    landlord_signed: mainLease.signed_by_landlord || false,
    tenant_signed: mainLease.signed_by_tenant || false,
    fully_signed:
      (mainLease.signed_by_landlord && mainLease.signed_by_tenant) || false,
    signature_date: mainLease.signature_date,
  };
}

// Delete document
export async function deleteLeaseDocument(id: string) {
  return await db.delete(lease_documents)
    .where(eq(lease_documents.id, id))
    .returning();
}

// Update document file (replace with new version)
export async function updateDocumentFile(
  id: string,
  file_url: string,
  file_name: string,
) {
  return await db.update(lease_documents)
    .set({
      file_url,
      file_name,
      // Reset signatures when document is updated
      signed_by_landlord: false,
      signed_by_tenant: false,
      signature_date: null,
    })
    .where(eq(lease_documents.id, id))
    .returning();
}