/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import * as path from "node:path";
import * as os from "node:os";
import * as fse from "fs-extra";

import { getFreePort } from "../../utils/port";
import { Homeserver, HomeserverConfig, HomeserverInstance, StartHomeserverOpts } from "../";
import { randB64Bytes } from "../../utils/rand";
import { Synapse } from "../synapse";
import { Docker } from "../../docker";

const dockerConfigDir = "/etc/dendrite/";
const dendriteConfigFile = "dendrite.yaml";

// Surprisingly, Dendrite implements the same register user Admin API Synapse, so we can just extend it
export class Dendrite extends Synapse implements Homeserver, HomeserverInstance {
    protected image = "matrixdotorg/dendrite-monolith:main";
    protected entrypoint = "/usr/bin/dendrite";

    /**
     * Start a dendrite instance: the template must be the name of one of the templates
     * in the playwright/plugins/dendritedocker/templates directory
     * @param opts
     */
    public async start(opts: StartHomeserverOpts): Promise<HomeserverInstance> {
        const denCfg = await cfgDirFromTemplate(this.image, opts);

        console.log(`Starting dendrite with config dir ${denCfg.configDir}...`);

        const dendriteId = await this.docker.run({
            image: this.image,
            params: [
                "-v",
                `${denCfg.configDir}:` + dockerConfigDir,
                "-p",
                `${denCfg.port}:8008/tcp`,
                "--entrypoint",
                this.entrypoint,
            ],
            containerName: `react-sdk-playwright-dendrite`,
            cmd: ["--config", dockerConfigDir + dendriteConfigFile, "--really-enable-open-registration", "true", "run"],
        });

        console.log(`Started dendrite with id ${dendriteId} on port ${denCfg.port}.`);

        // Await Dendrite healthcheck
        await this.docker.exec([
            "curl",
            "--connect-timeout",
            "30",
            "--retry",
            "30",
            "--retry-delay",
            "1",
            "--retry-all-errors",
            "--silent",
            "http://localhost:8008/_matrix/client/versions",
        ]);

        const dockerUrl = `http://${await this.docker.getContainerIp()}:8008`;
        this.config = {
            ...denCfg,
            serverId: dendriteId,
            dockerUrl,
        };
        return this;
    }

    public async stop(): Promise<string[]> {
        if (!this.config) throw new Error("Missing existing dendrite instance, did you call stop() before start()?");

        const dendriteLogsPath = path.join("playwright", "dendritelogs", this.config.serverId);
        await fse.ensureDir(dendriteLogsPath);

        await this.docker.persistLogsToFile({
            stdoutFile: path.join(dendriteLogsPath, "stdout.log"),
            stderrFile: path.join(dendriteLogsPath, "stderr.log"),
        });

        await this.docker.stop();

        await fse.remove(this.config.configDir);

        console.log(`Stopped dendrite id ${this.config.serverId}.`);

        return [path.join(dendriteLogsPath, "stdout.log"), path.join(dendriteLogsPath, "stderr.log")];
    }
}

export class Pinecone extends Dendrite {
    protected image = "matrixdotorg/dendrite-demo-pinecone:main";
    protected entrypoint = "/usr/bin/dendrite-demo-pinecone";
}

async function cfgDirFromTemplate(
    dendriteImage: string,
    opts: StartHomeserverOpts,
): Promise<Omit<HomeserverConfig, "dockerUrl">> {
    const template = "default"; // XXX: for now we only have one template
    const templateDir = path.join(__dirname, "templates", template);

    const stats = await fse.stat(templateDir);
    if (!stats?.isDirectory) {
        throw new Error(`No such template: ${template}`);
    }
    const tempDir = await fse.mkdtemp(path.join(os.tmpdir(), "react-sdk-dendritedocker-"));

    // copy the contents of the template dir, omitting homeserver.yaml as we'll template that
    console.log(`Copy ${templateDir} -> ${tempDir}`);
    await fse.copy(templateDir, tempDir, { filter: (f) => path.basename(f) !== dendriteConfigFile });

    const registrationSecret = randB64Bytes(16);

    const port = await getFreePort();
    const baseUrl = `http://localhost:${port}`;

    // now copy homeserver.yaml, applying substitutions
    console.log(`Gen ${path.join(templateDir, dendriteConfigFile)}`);
    let hsYaml = await fse.readFile(path.join(templateDir, dendriteConfigFile), "utf8");
    hsYaml = hsYaml.replace(/{{REGISTRATION_SECRET}}/g, registrationSecret);
    await fse.writeFile(path.join(tempDir, dendriteConfigFile), hsYaml);

    const docker = new Docker();
    await docker.run({
        image: dendriteImage,
        params: ["--entrypoint=", "-v", `${tempDir}:/mnt`],
        containerName: `react-sdk-playwright-dendrite-keygen`,
        cmd: ["/usr/bin/generate-keys", "-private-key", "/mnt/matrix_key.pem"],
    });

    return {
        port,
        baseUrl,
        configDir: tempDir,
        registrationSecret,
    };
}

export function isDendrite(): boolean {
    return process.env["PLAYWRIGHT_HOMESERVER"] === "dendrite" || process.env["PLAYWRIGHT_HOMESERVER"] === "pinecone";
}