import { Handlers } from "$fresh/server.ts";
import { db } from "../../../../../databases/db.ts";
import { ues } from "../../../../../databases/schema.ts";
import { eq } from "npm:drizzle-orm@0.45.2";

export const handler: Handlers = {
  // # 34 GET /ues/:idUE
  async GET(_request, context) {
    try {
      const idUE = parseInt(context.params.idUE);

      if (isNaN(idUE)) {
        return new Response(
          JSON.stringify({ error: "Paramètre idUE invalide" }),
          {
            status: 400,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const result = await db.select().from(ues).where(eq(ues.id, idUE));

      if (result.length === 0) {
        return new Response(
          JSON.stringify({ error: "Ressource introuvable" }),
          {
            status: 404,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      return new Response(JSON.stringify(result[0]), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      });
    } catch (error) {
      console.error("Error fetching UE:", error);
      return new Response("Failed to fetch data", { status: 500 });
    }
  },

  // #35 PUT /ues/:idUE
  async PUT(request, context) {
    try {
      const idUE = parseInt(context.params.idUE);

      if (isNaN(idUE)) {
        return new Response(
          JSON.stringify({ error: "Paramètre idUE invalide" }),
          {
            status: 400,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const body = await request.json();
      const { nom } = body;

      if (!nom) {
        return new Response("Champ 'nom' manquant", { status: 400 });
      }

      const result = await db.update(ues).set({ nom }).where(eq(ues.id, idUE))
        .returning();

      if (result.length === 0) {
        return new Response(
          JSON.stringify({ error: "Ressource introuvable" }),
          {
            status: 404,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      return new Response(JSON.stringify(result[0]), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      });
    } catch (error) {
      console.error("Error updating UE:", error);
      return new Response("Failed to update UE", { status: 500 });
    }
  },

  // #36 DELETE /ues/:idUE
  async DELETE(_request, context) {
    try {
      const idUE = parseInt(context.params.idUE);

      if (isNaN(idUE)) {
        return new Response(
          JSON.stringify({ error: "Paramètre idUE invalide" }),
          {
            status: 400,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      const result = await db.delete(ues).where(eq(ues.id, idUE)).returning();

      if (result.length === 0) {
        return new Response(
          JSON.stringify({ error: "Ressource introuvable" }),
          {
            status: 404,
            headers: { "Content-Type": "application/json" },
          },
        );
      }

      return new Response(null, { status: 204 });
    } catch (error) {
      console.error("Error deleting UE:", error);
      return new Response("Failed to delete UE", { status: 500 });
    }
  },
};