import { generate } from "@graphql-codegen/cli";
const fileRegex = /\.(graphql)$/; // not used, will be for the vite rerun

export default function levelupViteCodegen(options) {
  if (!options.schema) {
    throw new Error("No schema provided");
  }
  if (!options.output) {
    throw new Error("No output directory specified");
  }
  if (!options.gPath) {
    throw new Error(
      "No gPath directory specified. gPath is where you've initialized the 'g' client"
    );
  }

  const { schema, output, gPath } = options;

  return {
    name: "g-query-codegen",
    async buildStart() {
      try {
        await generate(
          {
            schema,
            documents: "./src/**/*.graphql",
            generates: {
              // * Generates the types for your schema
              [`${process.cwd()}/${output}/types.gGenerated.ts`]: {
                plugins: ["typescript"],
              },
              // * Generates near file .ts files for your fetch functions
              [`${process.cwd()}/${output}`]: {
                config: {
                  gPath,
                },
                preset: "near-operation-file",
                presetConfig: {
                  extension: ".gGenerated.ts",
                  folder: "./",
                  baseTypesPath: `types.gGenerated.ts`,
                },
                plugins: [
                  "typescript-operations", // operations, gets you types for operations (queries and mutations)
                  "@leveluptuts/g-query/codegen-plugin", // g-query codegen plugin.
                ],
              },
            },
          },
          true
        );
      } catch (e) {
        console.log("❓ gFetch Warning - No `.graphql` files found.");
        console.log(
          "❓ gFetch Warning - If you would like the gQuery generator to work (we reccomend you do)."
        );
        console.log(
          "❓ gFetch Warning - If you would like to add them, you will need to restart SvelteKit."
        );
      }
      return;
    },

    transform(src, id) {},
  };
}