// routes/api/lease/approve.ts
import { define } from "../../../utils.ts";
import { SessionCookie } from "../../auth/callback.ts";
import { approveLease, getLeaseById } from "../../../services/leaseService.ts";
import { getUserById } from "../../../services/userService.ts";
import { getPropertyById } from "../../../services/propertyService.ts";
import {
  sendLeaseApproved,
} from "../../../services/notificationService.ts";

export const handler = define.handlers({
  async POST(ctx) {
    try {
      const stateData: SessionCookie = ctx.state.data;
      const { user_id } = stateData;

      if (!user_id) {
        return new Response(
          JSON.stringify({ error: "Unauthorized" }),
          {
            status: 401,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const contentType = ctx.req.headers.get("content-type") || "";
      let data: Record<string, unknown> = {};

      if (contentType.includes("application/json")) {
        data = await ctx.req.json();
      } else {
        const formData = await ctx.req.formData();
        for (const [key, value] of formData.entries()) {
          data[key] = typeof value === "string" ? value : String(value);
        }
      }

      const lease_id = (data.lease_id as string) ||
        (data["lease_id"] as string);

      if (!lease_id) {
        return new Response(
          JSON.stringify({ error: "lease_id is required" }),
          {
            status: 400,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const lease = await getLeaseById(lease_id);
      if (!lease) {
        return new Response(
          JSON.stringify({ error: "Lease not found" }),
          {
            status: 404,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      if (lease.owner_id !== user_id) {
        return new Response(
          JSON.stringify({ error: "Unauthorized: You do not own this lease" }),
          {
            status: 403,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const result = await approveLease(lease_id, user_id);

      if (!result || result.length === 0) {
        return new Response(
          JSON.stringify({ error: "Failed to approve lease" }),
          {
            status: 500,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const approvedLease = result[0];
      
      if (lease.tenant_id) {
        const tenant = await getUserById(lease.tenant_id);
        const landlord = await getUserById(user_id);
        const property = lease.property_id
          ? await getPropertyById(lease.property_id)
          : null;

        await sendLeaseApproved(lease.tenant_id, {
          lease_id: lease.id,
          property_address: property?.address_1
            ? `${property.address_1}, ${property.city}, ${property.state}`
            : lease.property_address || "Property",
          tenant_name: tenant?.name || "Tenant",
          landlord_name: landlord?.name || "Landlord",
          monthly_rent: property?.monthly_rent ?? lease.rent ?? undefined,
        });
      }

      return new Response(
        JSON.stringify({
          success: true,
          lease: approvedLease,
          lease: approvedLease,
        }),
        {
          status: 200,
          headers: { "Content-Type": "application/json" },
        },
      );
    } catch (error) {
      console.error("Error approving lease:", error);
      return new Response(
        JSON.stringify({ error: String(error) }),
        {
          status: 500,
          headers: { "Content-Type": "application/json" },
        },
      );
    }
  },
});