import { Application, Router } from "https://deno.land/x/oak@v10.0.0/mod.ts";
import { applyGraphQL, gql, GQLError } from "https://deno.land/x/oak_graphql/mod.ts";

const app = new Application();

app.use(async (ctx, next) => {
  await next();
  const rt = ctx.response.headers.get("X-Response-Time");
  console.log(`${ctx.request.method} ${ctx.request.url} - ${rt}`);
});

app.use(async (ctx, next) => {
  const start = Date.now();
  await next();
  const ms = Date.now() - start;
  ctx.response.headers.set("X-Response-Time", `${ms}ms`);
});

const types = gql`
type User {
  firstName: String
  lastName: String
}

input UserInput {
  firstName: String
  lastName: String
}

type ResolveType {
  done: Boolean
}

type Query {
  getUser(id: String): User 
}

type Mutation {
  setUser(input: UserInput!): ResolveType!
}
`;

const resolvers = {
  Query: {
    getUser: (parent: any, { id }: any, context: any, info: any) => {
      console.log("id", id, context);
      if(context.user === "Aaron") {
        throw new GQLError({ type: "auth error in context" })
      }
      return {
        firstName: "wooseok",
        lastName: "lee",
      };
    },
  },
  Mutation: {
    setUser: (parent: any, { input: { firstName, lastName } }: any, context: any, info: any) => {
      console.log("input:", firstName, lastName);
      return {
        done: true,
      };
    },
  },
};

const GraphQLService = await applyGraphQL<Router>({
  Router,
  typeDefs: types,
  resolvers: resolvers,
  context: (ctx) => {
      // this line is for passing a user context for the auth
    return { user: "Aaron" };
  }
})


app.use(GraphQLService.routes(), GraphQLService.allowedMethods());

console.log("Server start at http://localhost:8080");
await app.listen({ port: 8080 });

throw new GQLError("string");
or
throw new GQLError({type: "General error", detail: "somthing critical!"});

const resolvers = {
  Query: {
    getUser: (parent: any, {id}: any, context: any, info: any) => {
      // ...query handling function here
    },
  },
  Mutation: {
    addUser: (parent: any, {firstName, lastName}: any, context: any, info: any) => {
      // ...add user codes here
    },
  }
}