"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.serveStaticPlugin = exports.seenUrls = void 0;
const fs_1 = __importDefault(require("fs"));
const path_1 = __importDefault(require("path"));
const chalk_1 = __importDefault(require("chalk"));
const send = require('koa-send');
const debug = require('debug')('vite:history');
exports.seenUrls = new Set();
exports.serveStaticPlugin = ({ root, app, resolver, config }) => {
    app.use(async (ctx, next) => {
        // short circuit requests that have already been explicitly handled
        if (ctx.body || ctx.status !== 404) {
            return;
        }
        // warn non-root references to assets under /public/
        if (ctx.path.startsWith('/public/') && resolver.isAssetRequest(ctx.path)) {
            console.error(chalk_1.default.yellow(`[vite] files in the public directory are served at the root path.\n` +
                `  ${chalk_1.default.blue(ctx.path)} should be changed to ${chalk_1.default.blue(ctx.path.replace(/^\/public\//, '/'))}.`));
        }
        // handle possible user request -> file aliases
        const expectsHtml = ctx.headers.accept && ctx.headers.accept.includes('text/html');
        if (!expectsHtml) {
            const filePath = resolver.requestToFile(ctx.path);
            if (filePath !== ctx.path &&
                fs_1.default.existsSync(filePath) &&
                fs_1.default.statSync(filePath).isFile()) {
                await ctx.read(filePath);
            }
        }
        await next();
        // the first request to the server should never 304
        if (exports.seenUrls.has(ctx.url) && ctx.fresh) {
            ctx.status = 304;
        }
        exports.seenUrls.add(ctx.url);
    });
    app.use(require('koa-etag')());
    app.use(require('koa-static')(root));
    app.use(require('koa-static')(path_1.default.join(root, 'public')));
    // history API fallback
    app.use(async (ctx, next) => {
        if (ctx.status !== 404) {
            return next();
        }
        if (ctx.method !== 'GET') {
            debug(`not redirecting ${ctx.url} (not GET)`);
            return next();
        }
        const accept = ctx.headers && ctx.headers.accept;
        if (typeof accept !== 'string') {
            debug(`not redirecting ${ctx.url} (no headers.accept)`);
            return next();
        }
        if (accept.includes('application/json')) {
            debug(`not redirecting ${ctx.url} (json)`);
            return next();
        }
        if (!accept.includes('text/html')) {
            debug(`not redirecting ${ctx.url} (not accepting html)`);
            return next();
        }
        debug(`redirecting ${ctx.url} to /index.html`);
        try {
            await send(ctx, `index.html`, { root });
        }
        catch (e) {
            ctx.url = '/index.html';
            ctx.status = 404;
            return next();
        }
    });
};
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