/*
 * The MIT License
 *
 * Copyright (c) 2010, Kohsuke Kawaguchi
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.kohsuke.github;

import com.infradna.tool.bridge_method_injector.WithBridgeMethods;

import java.io.IOException;
import java.util.*;

/**
 * Represents an user of GitHub.
 *
 * @author Kohsuke Kawaguchi
 */
public class GHUser extends GHPerson {

    /**
     * Gets keys.
     *
     * @return the keys
     * @throws IOException
     *             the io exception
     */
    public List<GHKey> getKeys() throws IOException {
        return Collections.unmodifiableList(
                Arrays.asList(root.createRequest().withUrlPath(getApiTailUrl("keys")).fetchArray(GHKey[].class)));
    }

    /**
     * Follow this user.
     *
     * @throws IOException
     *             the io exception
     */
    public void follow() throws IOException {
        root.createRequest().method("PUT").withUrlPath("/user/following/" + login).send();
    }

    /**
     * Unfollow this user.
     *
     * @throws IOException
     *             the io exception
     */
    public void unfollow() throws IOException {
        root.createRequest().method("DELETE").withUrlPath("/user/following/" + login).send();
    }

    /**
     * Lists the users that this user is following
     *
     * @return the follows
     * @throws IOException
     *             the io exception
     */
    @WithBridgeMethods(Set.class)
    public GHPersonSet<GHUser> getFollows() throws IOException {
        return new GHPersonSet<GHUser>(listFollows().asList());
    }

    /**
     * Lists the users that this user is following
     *
     * @return the paged iterable
     */
    public PagedIterable<GHUser> listFollows() {
        return listUser("following");
    }

    /**
     * Lists the users who are following this user.
     *
     * @return the followers
     * @throws IOException
     *             the io exception
     */
    @WithBridgeMethods(Set.class)
    public GHPersonSet<GHUser> getFollowers() throws IOException {
        return new GHPersonSet<GHUser>(listFollowers().asList());
    }

    /**
     * Lists the users who are following this user.
     *
     * @return the paged iterable
     */
    public PagedIterable<GHUser> listFollowers() {
        return listUser("followers");
    }

    private PagedIterable<GHUser> listUser(final String suffix) {
        return root.createRequest()
                .withUrlPath(getApiTailUrl(suffix))
                .toIterable(GHUser[].class, item -> item.wrapUp(root));
    }

    /**
     * Lists all the subscribed (aka watched) repositories.
     * <p>
     * https://developer.github.com/v3/activity/watching/
     *
     * @return the paged iterable
     */
    public PagedIterable<GHRepository> listSubscriptions() {
        return listRepositories("subscriptions");
    }

    /**
     * Lists all the repositories that this user has starred.
     *
     * @return the paged iterable
     */
    public PagedIterable<GHRepository> listStarredRepositories() {
        return listRepositories("starred");
    }

    private PagedIterable<GHRepository> listRepositories(final String suffix) {
        return root.createRequest()
                .withUrlPath(getApiTailUrl(suffix))
                .toIterable(GHRepository[].class, item -> item.wrap(root));
    }

    /**
     * Returns true if this user belongs to the specified organization.
     *
     * @param org
     *            the org
     * @return the boolean
     */
    public boolean isMemberOf(GHOrganization org) {
        return org.hasMember(this);
    }

    /**
     * Returns true if this user belongs to the specified team.
     *
     * @param team
     *            the team
     * @return the boolean
     */
    public boolean isMemberOf(GHTeam team) {
        return team.hasMember(this);
    }

    /**
     * Returns true if this user belongs to the specified organization as a public member.
     *
     * @param org
     *            the org
     * @return the boolean
     */
    public boolean isPublicMemberOf(GHOrganization org) {
        return org.hasPublicMember(this);
    }

    static GHUser[] wrap(GHUser[] users, GitHub root) {
        for (GHUser f : users)
            f.root = root;
        return users;
    }

    /**
     * Gets the organization that this user belongs to publicly.
     *
     * @return the organizations
     * @throws IOException
     *             the io exception
     */
    @WithBridgeMethods(Set.class)
    public GHPersonSet<GHOrganization> getOrganizations() throws IOException {
        GHPersonSet<GHOrganization> orgs = new GHPersonSet<GHOrganization>();
        Set<String> names = new HashSet<String>();
        for (GHOrganization o : root.createRequest()
                .withUrlPath("/users/" + login + "/orgs")
                .fetchArray(GHOrganization[].class)) {
            if (names.add(o.getLogin())) // I've seen some duplicates in the data
                orgs.add(root.getOrganization(o.getLogin()));
        }
        return orgs;
    }

    /**
     * Lists events performed by a user (this includes private events if the caller is authenticated.
     */
    public PagedIterable<GHEventInfo> listEvents() throws IOException {
        return root.createRequest()
                .withUrlPath(String.format("/users/%s/events", login))
                .toIterable(GHEventInfo[].class, item -> item.wrapUp(root));
    }

    /**
     * Lists Gists created by this user.
     *
     * @return the paged iterable
     * @throws IOException
     *             the io exception
     */
    public PagedIterable<GHGist> listGists() throws IOException {
        return root.createRequest()
                .withUrlPath(String.format("/users/%s/gists", login))
                .toIterable(GHGist[].class, item -> item.wrapUp(this));
    }

    @Override
    public int hashCode() {
        return login.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof GHUser) {
            GHUser that = (GHUser) obj;
            return this.login.equals(that.login);
        }
        return false;
    }

    String getApiTailUrl(String tail) {
        if (tail.length() > 0 && !tail.startsWith("/"))
            tail = '/' + tail;
        return "/users/" + login + tail;
    }

    GHUser wrapUp(GitHub root) {
        super.wrapUp(root);
        return this;
    }
}