/*
 * Copyright © 2020 Atomist, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { BitBucketServerRepoRef } from "@atomist/automation-client/lib/operations/common/BitBucketServerRepoRef";
import { GitHubRepoRef } from "@atomist/automation-client/lib/operations/common/GitHubRepoRef";
import { GitlabRepoRef } from "@atomist/automation-client/lib/operations/common/GitlabRepoRef";
import {
    RemoteRepoRef,
} from "@atomist/automation-client/lib/operations/common/RepoId";
import * as _ from "lodash";
import { SdmGoalEvent } from "../../../api/goal/SdmGoalEvent";
import { RepoRefResolver } from "../../../spi/repo-ref/RepoRefResolver";
import {
    CoreRepoFieldsAndChannels,
    OnPushToAnyBranch,
    ProviderType,
} from "../../../typings/types";

export class DefaultRepoRefResolver implements RepoRefResolver {

    /**
     * Obtain a RemoteRepoRef from the given push, correctly
     * resolving provider.
     * @param {OnPushToAnyBranch.Push} push
     * @return {any}
     */
    public repoRefFromPush(push: OnPushToAnyBranch.Push): RemoteRepoRef {
        const providerType = push.repo.org.provider.providerType;
        switch (providerType) {
            case ProviderType.github_com:
            case ProviderType.ghe:
                return GitHubRepoRef.from({
                    owner: push.repo.owner,
                    repo: push.repo.name,
                    sha: push.after.sha,
                    rawApiBase: push.repo.org.provider.apiUrl,
                    branch: push.branch,
                });
            case ProviderType.bitbucket:
                const providerUrl = push.repo.org.provider.url;
                return this.toBitBucketServerRepoRef({
                    providerUrl,
                    owner: push.repo.owner,
                    name: push.repo.name,
                    sha: push.after.sha,
                    branch: push.branch,
                });
            case ProviderType.gitlab:
                return GitlabRepoRef.from({
                    owner: push.repo.owner,
                    repo: push.repo.name,
                    sha: push.after.sha,
                    rawApiBase: push.repo.org.provider.apiUrl,
                    gitlabRemoteUrl: push.repo.org.provider.url,
                    branch: push.branch,
                });
            case ProviderType.bitbucket_cloud:
                throw new Error("BitBucket Cloud not yet supported");
            default:
                throw new Error(`Provider ${providerType} not currently supported in SDM`);
        }
    }

    public toBitBucketServerRepoRef(params: {
        providerUrl: string,
        owner: string,
        name: string,
        sha: string,
        branch?: string,
    }): BitBucketServerRepoRef {
        const url = params.providerUrl;
        const id = new BitBucketServerRepoRef(
            url,
            params.owner,
            params.name,
            true,
            params.sha,
        );
        id.branch = params.branch;
        // id.cloneUrl = (creds: BasicAuthCredentials) =>
        //     `http://${encodeURIComponent(creds.username)}:${encodeURIComponent(creds.password)}@${id.remoteBase}${id.pathComponent}.git`;
        return id;
    }

    public providerIdFromPush(push: OnPushToAnyBranch.Push): string {
        return push.repo.org.provider.providerId;
    }

    public repoRefFromSdmGoal(sdmGoal: SdmGoalEvent): RemoteRepoRef {
        const provider = sdmGoal.push.repo.org.provider;
        switch (provider.providerType) {
            case ProviderType.github_com:
            case ProviderType.ghe:
                return GitHubRepoRef.from({
                    owner: sdmGoal.push.repo.owner,
                    repo: sdmGoal.push.repo.name,
                    sha: sdmGoal.sha,
                    branch: sdmGoal.branch,
                    rawApiBase: provider.apiUrl,
                });
            case ProviderType.bitbucket:
                return this.toBitBucketServerRepoRef({
                    providerUrl: provider.url,
                    owner: sdmGoal.push.repo.owner,
                    name: sdmGoal.push.repo.name,
                    sha: sdmGoal.sha,
                    branch: sdmGoal.branch,
                });
            case ProviderType.gitlab:
                return GitlabRepoRef.from({
                    owner: sdmGoal.push.repo.owner,
                    repo: sdmGoal.push.repo.name,
                    sha: sdmGoal.sha,
                    rawApiBase: provider.apiUrl,
                    gitlabRemoteUrl: provider.url,
                    branch: sdmGoal.branch,
                });
            default:
                throw new Error(`Provider ${provider.providerType} not currently supported in SDM`);
        }
    }

    /**
     * Convert GraphQL return to our remote repo ref, instantiating
     * the correct type based on provider
     * @param {CoreRepoFieldsAndChannels.Fragment} repo
     * @param opts options - sha or branch
     * @return {RemoteRepoRef}
     */
    public toRemoteRepoRef(repo: CoreRepoFieldsAndChannels.Fragment, opts: { sha?: string, branch?: string } = {}): RemoteRepoRef {
        const providerType = _.get(repo, "org.provider.providerType");
        const apiUrl = _.get(repo, "org.provider.apiUrl");
        const url = _.get(repo, "org.provider.url");

        switch (providerType) {
            case undefined:
            // tslint:disable-next-line:no-null-keyword
            case null:
            case ProviderType.github_com:
            case ProviderType.ghe:
                return GitHubRepoRef.from({
                    owner: repo.owner,
                    repo: repo.name,
                    sha: opts.sha,
                    branch: opts.branch,
                    rawApiBase: apiUrl,
                });
            case ProviderType.bitbucket:
                return this.toBitBucketServerRepoRef({
                    owner: repo.owner,
                    name: repo.name,
                    sha: opts.sha,
                    branch: opts.branch,
                    providerUrl: apiUrl,
                });
            case ProviderType.gitlab:
                return GitlabRepoRef.from({
                    owner: repo.owner,
                    repo: repo.name,
                    sha: opts.sha,
                    rawApiBase: apiUrl,
                    gitlabRemoteUrl: url,
                    branch: opts.branch,
                });
            default:
                throw new Error(`Provider ${repo.org.provider.providerType} not currently supported in SDM`);
        }
    }
}