/*
 * 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 {
    MappedParameter,
    MappedParameters,
    Parameter,
    Parameters,
    Secret,
    Secrets,
} from "@atomist/automation-client/lib/decorators";
import { HandleCommand } from "@atomist/automation-client/lib/HandleCommand";
import { HandlerContext } from "@atomist/automation-client/lib/HandlerContext";
import {
    success,
    Success,
} from "@atomist/automation-client/lib/HandlerResult";
import {
    commandHandlerFrom,
    OnCommand,
} from "@atomist/automation-client/lib/onCommand";
import { GitHubRepoRef } from "@atomist/automation-client/lib/operations/common/GitHubRepoRef";
import { buttonForCommand } from "@atomist/automation-client/lib/spi/message/MessageClient";
import {
    Attachment,
    SlackMessage,
} from "@atomist/slack-messages";
import {
    ExecuteGoal,
    GoalInvocation,
} from "../../../api/goal/GoalInvocation";
import { deleteRepository } from "../../util/github/ghub";
import { fetchProvider } from "../../util/github/gitHubProvider";

@Parameters()
export class DeleteRepositoryParameters {

    @Secret(Secrets.userToken("delete_repo"))
    public githubToken: string;

    @MappedParameter(MappedParameters.GitHubOwner)
    public owner: string;

    @MappedParameter(MappedParameters.GitHubRepository)
    public repo: string;

    @MappedParameter(MappedParameters.GitHubRepositoryProvider)
    public providerId: string;

    @Parameter({required: true})
    public areYouSure: string;
}

export const DeleteRepositoryCommandName = "DeleteRepository";

export function deleteRepositoryCommand(): HandleCommand {
    return commandHandlerFrom(deleteRepositoryPlease(),
        DeleteRepositoryParameters,
        DeleteRepositoryCommandName,
        "Really delete the GitHub repository",
        "delete this repository");
}

function deleteRepositoryPlease(): OnCommand<DeleteRepositoryParameters> {
    return async (ctx: HandlerContext, commandParams: DeleteRepositoryParameters) => {
        if (commandParams.areYouSure.toLowerCase() !== "yes") {
            return ctx.messageClient.respond("You didn't say 'yes' to 'are you sure?' so I won't do anything.")
                .then(success);
        }

        const provider = await fetchProvider(ctx, commandParams.providerId);
        const id = GitHubRepoRef.from({owner: commandParams.owner, repo: commandParams.repo, rawApiBase: provider.apiUrl});

        await deleteRepository(commandParams.githubToken, id);
        return Success;
    };
}

export function offerToDeleteRepository(): ExecuteGoal {
    const GitHubDotComProviderId = "zjlmxjzwhurspem";
    return async (goalInvocation: GoalInvocation) => {
        const {addressChannels, id} = goalInvocation;

        const params = new DeleteRepositoryParameters();
        params.owner = id.owner;
        params.repo = id.repo;
        params.providerId = GitHubDotComProviderId; // we should put this in the RWLC?
        params.areYouSure = "yes";

        const deleteRepoButton = buttonForCommand({text: "Delete Repo", style: "danger"},
            DeleteRepositoryCommandName,
            params as any);

        const attachment: Attachment = {
            fallback: "delete repository button",
            color: "#ff0234",
            text: "Would you like to delete this repository?",
            actions: [deleteRepoButton],
        };

        const message: SlackMessage = {
            attachments: [attachment],
        };
        await addressChannels(message);

        return Success;
    };
}