#!/usr/bin/env node
/*
 * HealthChat theme sync.
 *
 * Single source of truth for the "HealthChat Light" theme lives in
 *   apps/web/element.io/healthchat/HealthChat-Light-Theme.json
 * This script injects it into every element-web config that ships the theme, so the palette
 * is authored once and never drifts between the dev and desktop configs.
 *
 * The production web deployment (matrix-docker-ansible-deploy) renders its config.json from
 * host_vars and carries an inline copy of this theme; re-copy this file there when it changes.
 *
 * Usage:
 *   node apps/web/scripts/healthchat-sync-theme.mjs          # write the theme into all configs
 *   node apps/web/scripts/healthchat-sync-theme.mjs --check  # exit 1 if any config is out of sync
 *
 * Run `pnpm --filter element-web healthchat:theme` after editing the canonical theme;
 * the --check variant runs in lint/CI to catch an un-synced edit.
 */
import { readFileSync, writeFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, resolve } from "node:path";
import prettier from "prettier";

const scriptDir = dirname(fileURLToPath(import.meta.url));
const repoRoot = resolve(scriptDir, "../../..");

const CANONICAL = resolve(repoRoot, "apps/web/element.io/healthchat/HealthChat-Light-Theme.json");

// Configs that must carry the theme in setting_defaults.custom_themes.
const TARGETS = [
    "apps/web/config.json", // dev server config (also served by the web Docker image)
    "apps/desktop/element.io/healthchat/config.json", // desktop variant config bundled into the app
];

const check = process.argv.includes("--check");

const theme = JSON.parse(readFileSync(CANONICAL, "utf8"));

let changed = 0;
for (const rel of TARGETS) {
    const path = resolve(repoRoot, rel);
    const raw = readFileSync(path, "utf8");
    const config = JSON.parse(raw);
    config.setting_defaults ??= {};
    config.setting_defaults.custom_themes = [theme];

    // Format identically to `prettier --write` so the output is byte-for-byte what the
    // repo's formatting lint expects, keeping --check stable.
    const options = await prettier.resolveConfig(path);
    const next = await prettier.format(JSON.stringify(config), { ...options, filepath: path });

    if (next === raw) {
        continue;
    }
    changed++;
    if (check) {
        console.error(`out of sync: ${rel} (run: pnpm --filter element-web healthchat:theme)`);
    } else {
        writeFileSync(path, next);
        console.log(`synced theme -> ${rel}`);
    }
}

if (check) {
    if (changed > 0) process.exit(1);
    console.log("all configs in sync with the canonical HealthChat theme");
} else if (changed === 0) {
    console.log("all configs already in sync");
}