import $ from '@/core/app';

import {
    ARTIFACT_REPOSITORY_KEY,
    ARTIFACTS_KEY,
    SETTINGS_KEY,
} from '@/constants';
import { deleteByName, findByName, updateByName } from '@/utils/database';
import { failed, success } from '@/restful/response';
import {
    InternalServerError,
    RequestInvalidError,
    ResourceNotFoundError,
} from '@/restful/errors';
import Gist from '@/utils/gist';

export default function register($app) {
    // Initialization
    if (!$.read(ARTIFACTS_KEY)) $.write({}, ARTIFACTS_KEY);

    // RESTful APIs
    $app.route('/api/artifacts')
        .get(getAllArtifacts)
        .post(createArtifact)
        .put(replaceArtifact);

    $app.route('/api/artifact/:name')
        .get(getArtifact)
        .patch(updateArtifact)
        .delete(deleteArtifact);
}

function getAllArtifacts(req, res) {
    const allArtifacts = $.read(ARTIFACTS_KEY);
    success(res, allArtifacts);
}

function replaceArtifact(req, res) {
    const allArtifacts = req.body;
    $.write(allArtifacts, ARTIFACTS_KEY);
    success(res);
}

async function getArtifact(req, res) {
    let { name } = req.params;
    name = decodeURIComponent(name);
    const allArtifacts = $.read(ARTIFACTS_KEY);
    const artifact = findByName(allArtifacts, name);

    if (artifact) {
        success(res, artifact);
    } else {
        failed(
            res,
            new ResourceNotFoundError(
                'RESOURCE_NOT_FOUND',
                `Artifact ${name} does not exist!`,
            ),
            404,
        );
    }
}

function createArtifact(req, res) {
    const artifact = req.body;
    if (!validateArtifactName(artifact.name)) {
        failed(
            res,
            new RequestInvalidError(
                'INVALID_ARTIFACT_NAME',
                `Artifact name ${artifact.name} is invalid.`,
            ),
        );
        return;
    }

    $.info(`正在创建远程配置：${artifact.name}`);
    const allArtifacts = $.read(ARTIFACTS_KEY);
    if (findByName(allArtifacts, artifact.name)) {
        failed(
            res,
            new RequestInvalidError(
                'DUPLICATE_KEY',
                `Artifact ${artifact.name} already exists.`,
            ),
        );
    } else {
        allArtifacts.push(artifact);
        $.write(allArtifacts, ARTIFACTS_KEY);
        success(res, artifact, 201);
    }
}

function updateArtifact(req, res) {
    const allArtifacts = $.read(ARTIFACTS_KEY);
    let oldName = req.params.name;
    oldName = decodeURIComponent(oldName);
    const artifact = findByName(allArtifacts, oldName);
    if (artifact) {
        $.info(`正在更新远程配置：${artifact.name}`);
        const newArtifact = {
            ...artifact,
            ...req.body,
        };
        if (!validateArtifactName(newArtifact.name)) {
            failed(
                res,
                new RequestInvalidError(
                    'INVALID_ARTIFACT_NAME',
                    `Artifact name ${newArtifact.name} is invalid.`,
                ),
            );
            return;
        }
        updateByName(allArtifacts, oldName, newArtifact);
        $.write(allArtifacts, ARTIFACTS_KEY);
        success(res, newArtifact);
    } else {
        failed(
            res,
            new RequestInvalidError(
                'DUPLICATE_KEY',
                `Artifact ${oldName} already exists.`,
            ),
        );
    }
}

async function deleteArtifact(req, res) {
    let { name } = req.params;
    name = decodeURIComponent(name);
    $.info(`正在删除远程配置：${name}`);
    const allArtifacts = $.read(ARTIFACTS_KEY);
    try {
        const artifact = findByName(allArtifacts, name);
        if (!artifact) throw new Error(`远程配置：${name}不存在！`);
        if (artifact.updated) {
            // delete gist
            const files = {};
            files[encodeURIComponent(artifact.name)] = {
                content: '',
            };
            // 当别的Sub 删了同步订阅 或 gist里面删了 当前设备没有删除 时 无法删除的bug
            try {
                await syncToGist(files);
            } catch (i) {
                $.error(`Function syncToGist: ${name} : ${i}`);
            }
        }
        // delete local cache
        deleteByName(allArtifacts, name);
        $.write(allArtifacts, ARTIFACTS_KEY);
        success(res);
    } catch (err) {
        $.error(`无法删除远程配置：${name}，原因：${err}`);
        failed(
            res,
            new InternalServerError(
                `FAILED_TO_DELETE_ARTIFACT`,
                `Failed to delete artifact ${name}`,
                `Reason: ${err}`,
            ),
        );
    }
}

function validateArtifactName(name) {
    return /^[a-zA-Z0-9._-]*$/.test(name);
}

async function syncToGist(files) {
    const { gistToken } = $.read(SETTINGS_KEY);
    if (!gistToken) {
        return Promise.reject('未设置Gist Token！');
    }
    const manager = new Gist({
        token: gistToken,
        key: ARTIFACT_REPOSITORY_KEY,
    });
    return manager.upload(files);
}

export { syncToGist };