// Vitest configuration for the JellyTau frontend suite.
//
// TRACES: | DR-215
import { defineConfig } from "vitest/config";
import { svelte } from "@sveltejs/vite-plugin-svelte";
import { resolve } from "path";

export default defineConfig({
  plugins: [svelte({ hot: !process.env.VITEST })],
  test: {
    globals: true,
    environment: "jsdom",
    setupFiles: ["./src/test/setup-globals.ts", "./src/test/setup.ts"],
    // `scripts/` is included so build tooling (the traceability coverage
    // engine) is covered by the normal suite rather than only by CI.
    include: ["src/**/*.{test,spec}.{js,ts}", "scripts/**/*.{test,spec}.{js,ts}"],
    coverage: {
      provider: "v8",
      reporter: ["text", "json", "html"],
      exclude: ["node_modules/", "src/test/", "**/*.test.ts", "**/*.spec.ts", "src-tauri/"],

      // RATCHET POLICY — these numbers only ever go UP.
      //
      // Same rule as MIN_THRESHOLD in .gitea/workflows/traceability-check.yml:
      // they sit a few points under what the suite actually achieves, so
      // deleting a test or landing a large untested module trips the gate, while
      // ordinary churn does not. Raise them when coverage rises durably. Never
      // lower one to make a red build pass — write the missing test instead.
      //
      // Measured at the time of writing (`bun run test:coverage`):
      //   statements 54.58 · branches 48.70 · functions 49.56 · lines 55.13
      //
      // The absolute figures are held down by `.svelte` components, which are
      // largely untested by design here — the project's pattern is to extract
      // the logic into a plain `.ts` module (episodeStrip.ts, TrackList.logic.ts)
      // and test that. Those extracted modules sit far higher.
      thresholds: {
        statements: 51,
        branches: 45,
        functions: 46,
        lines: 52,
      },
    },
  },
  resolve: {
    conditions: ["browser"],
    alias: {
      $lib: resolve(__dirname, "./src/lib"),
      "$lib/": resolve(__dirname, "./src/lib/"),
      "$app/environment": resolve(__dirname, "./src/test/mocks/app-environment.ts"),
      "$app/navigation": resolve(__dirname, "./src/test/mocks/app-navigation.ts"),
      "$app/stores": resolve(__dirname, "./src/test/mocks/app-stores.ts"),
    },
  },
});