import { TRPCError } from "@trpc/server";
import type { CommittedMessage } from "../../types";
import { router, createCallerFactory, authProcedure } from "./server";
import { z } from "zod";

const authConversationProcedure = authProcedure
  .input(z.object({ id: z.string() }))
  .use(async ({ input: { id }, ctx: { dbClient, jwt }, next }) => {
    const rows = await dbClient
      .selectFrom("conversations")
      .selectAll()
      .where("id", "=", id)
      .execute();
    if (rows[0].userId !== jwt.id) {
      throw new TRPCError({ code: "UNAUTHORIZED" });
    }
    return next({
      ctx: {
        conversationRow: rows[0],
      },
    });
  });

export const conversations = router({
  fetchAll: authProcedure.query(async ({ ctx: { dbClient, jwt } }) => {
    const rows = await dbClient
      .selectFrom("conversations")
      .where("userId", "=", jwt.id as string)
      .selectAll()
      .execute();
    return rows;
  }),
  fetchOne: authConversationProcedure.query(
    async ({ ctx: { conversationRow } }) => {
      return conversationRow;
    }
  ),
  start: authProcedure.mutation(async ({ ctx: { dbClient, jwt } }) => {
    const insertedRows = await dbClient
      .insertInto("conversations")
      .values({
        title: "New Conversation",
        userId: jwt?.id as string,
      })
      .returningAll()
      .execute();
    return insertedRows[0];
  }),
  deleteOne: authConversationProcedure.mutation(
    async ({ input: { id }, ctx: { dbClient, jwt } }) => {
      await dbClient
        .deleteFrom("conversations")
        .where("id", "=", id)
        .where("userId", "=", jwt.id as string)
        .execute();
      return { ok: true };
    }
  ),
  updateTitle: authConversationProcedure
    .input(
      z.object({
        title: z.string(),
      })
    )
    .mutation(async ({ input: { id, title }, ctx: { dbClient, jwt } }) => {
      await dbClient
        .updateTable("conversations")
        .set({ title })
        .where("id", "=", id)
        .where("userId", "=", jwt.id as string)
        .execute();
      return { ok: true };
    }),
  fetchMessages: authProcedure
    .input(z.object({ conversationId: z.string() }))
    .query(async ({ input: { conversationId }, ctx: { dbClient, jwt } }) => {
      const rows = await dbClient
        .selectFrom("messages")
        .innerJoin(
          "conversations",
          "conversations.id",
          "messages.conversationId"
        )
        .selectAll("messages")
        .where("conversationId", "=", conversationId)
        .where("conversations.userId", "=", jwt.id as string)
        .execute();
      return rows as Array<CommittedMessage>;
    }),
});

export const createCaller = createCallerFactory(conversations);