import * as esbuild from "esbuild";
import grabAllPages from "../../utils/grab-all-pages";
import grabDirNames from "../../utils/grab-dir-names";
import isDevelopment from "../../utils/is-development";
import tailwindEsbuildPlugin from "../server/web-pages/tailwind-esbuild-plugin";
import grabClientHydrationScript from "./grab-client-hydration-script";
import path from "path";
import virtualFilesPlugin from "./plugins/virtual-files-plugin";
import esbuildCTXArtifactTracker from "./plugins/esbuild-ctx-artifact-tracker";
import { logBuildErrorsOnce, } from "../../utils/build-error-log";
import { log } from "../../utils/log";
import grabRootFilePath from "../server/web-pages/grab-root-file-path";
// Snapshot of the entry key set + root file presence of the last build.
// When it differs from the freshly computed set, the esbuild context must
// be recreated (entry points are fixed at context creation).
let last_entry_keys = undefined;
let last_root_file_path = undefined;
// Local paths of the pages that made it into the current entry set. Pages
// skipped at build time (e.g. created empty, no default export yet) are
// absent, so the watcher can treat their later edits as structural.
let last_entry_pages = new Set();
/**
 * True when `local_path` is a hydration entry of the current esbuild context.
 */
export function isHydrationEntryPage(local_path) {
    return last_entry_pages.has(local_path);
}
function arraysEqual(a, b) {
    if (a.length !== b.length)
        return false;
    for (let i = 0; i < a.length; i++) {
        if (a[i] !== b[i])
            return false;
    }
    return true;
}
export default async function allPagesESBuildContextBundler(params) {
    const { HYDRATION_DST_DIR, BUNX_HYDRATION_SRC_DIR } = grabDirNames();
    try {
        const pages = grabAllPages({ exclude_api: true });
        global.BUNEXT_PAGE_FILES = pages;
        const dev = isDevelopment();
        const entryToPage = new Map();
        for (const page of pages) {
            const tsx = await grabClientHydrationScript({
                page_local_path: page.local_path,
            });
            if (!tsx) {
                continue;
            }
            const entryFile = path.join(BUNX_HYDRATION_SRC_DIR, `${page.url_path}.tsx`);
            entryToPage.set(entryFile, { ...page, tsx });
        }
        const entryPoints = [...entryToPage.keys()].map((e) => `hydration-virtual:${e}`);
        const entry_keys = [...entryToPage.keys()].sort();
        const { root_file_path } = grabRootFilePath();
        const structure_changed = !global.BUNEXT_BUNDLER_CTX ||
            global.BUNEXT_BUNDLER_CTX_DISPOSED ||
            !last_entry_keys ||
            !arraysEqual(last_entry_keys, entry_keys) ||
            last_root_file_path !== root_file_path;
        if (structure_changed) {
            try {
                await global.BUNEXT_BUNDLER_CTX?.dispose();
            }
            catch (error) { }
            global.BUNEXT_BUNDLER_CTX = undefined;
            global.BUNEXT_BUNDLER_CTX = await esbuild.context({
                entryPoints,
                outdir: HYDRATION_DST_DIR,
                bundle: true,
                minify: !dev,
                format: "esm",
                target: "es2020",
                platform: "browser",
                define: {
                    "process.env.NODE_ENV": JSON.stringify(dev ? "development" : "production"),
                },
                entryNames: "[dir]/[hash]",
                metafile: true,
                plugins: [
                    forceExternalReact(),
                    tailwindEsbuildPlugin,
                    virtualFilesPlugin({
                        entryToPage,
                    }),
                    esbuildCTXArtifactTracker({
                        entryToPage,
                        post_build_fn: params?.post_build_fn,
                        build_only: params?.build_only || params?.start,
                        refresh_props_on_first_build: params?.refresh_props,
                    }),
                ],
                jsx: "automatic",
                splitting: true,
                treeShaking: true,
                external: [
                    "react",
                    "react-dom",
                    "react-dom/client",
                    "react/jsx-runtime",
                    "react/jsx-dev-runtime",
                    ...(global.BUNEXT_CONFIG.page_compiler_excludes || []),
                ],
                // esbuild's own error logging prints per attempt; the
                // artifact-tracker plugin reports errors (deduped, once) itself.
                logLevel: "silent",
            });
            last_entry_keys = entry_keys;
            last_root_file_path = root_file_path;
            last_entry_pages = new Set([...entryToPage.values()].map((p) => p.local_path));
        }
        await global.BUNEXT_BUNDLER_CTX.rebuild();
    }
    catch (error) {
        global.BUNEXT_BUILD_FAILED = true;
        // When the build fails with esbuild errors, the artifact-tracker's
        // onEnd already reported them (deduped). "Build failed with N errors"
        // is that same failure rethrown by esbuild's API — re-logging it here
        // would double every incident.
        if (String(error?.message || "").startsWith("Build failed with")) {
            return;
        }
        logBuildErrorsOnce([
            {
                text: `ESBUILD Error => ${error?.message || String(error)}`,
            },
        ], (line) => log.error(line));
    }
}
function forceExternalReact() {
    return {
        name: "force-external-react",
        setup(build) {
            build.onResolve({ filter: /^react(-dom)?(\/.*)?$/ }, (args) => {
                if (args.pluginData?.externalReact)
                    return null;
                return {
                    path: args.path,
                    external: true,
                };
            });
        },
    };
}