// Copyright (c) 2021, Fr.Terrot. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file. 

package io.gitea.mylyn.core;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import io.gitea.ApiException;
import io.gitea.api.ApiVersion;
import io.gitea.api.IssueApi;
import io.gitea.api.RepositoryApi;
import io.gitea.api.UserApi;
import io.gitea.model.Comment;
import io.gitea.model.CreateIssueCommentOption;
import io.gitea.model.CreateIssueOption;
import io.gitea.model.EditIssueCommentOption;
import io.gitea.model.EditIssueOption;
import io.gitea.model.EditLabelOption;
import io.gitea.model.Issue;
import io.gitea.model.IssueLabelsOption;
import io.gitea.model.IssueState;
import io.gitea.model.Label;
import io.gitea.model.Milestone;
import io.gitea.model.Repository;
import io.gitea.model.User;

/**
 * Handle Gitea connection and provides helpers to API.
 * 
 */
public class GiteaConnection {
    public final String owner;
    public final String repo;
    public final String host;
    public final Repository repository;
    public final GiteaAttributeMapper mapper;

    private List<Milestone> milestones;
    private List<User> members;
    private List<Label> labels;

    /** Targetted Gitea Api Version */
    public static final ApiVersion apiVersion = ApiVersion.V1;

    public GiteaConnection(String host, Repository project, GiteaAttributeMapper mapper) {
        this.host = host;
        this.repository = project;
        this.mapper = mapper;
        this.owner = project.getOwner().getLogin();
        this.repo = project.getName();
    }

    public UserApi userApi() {
        return new UserApi();
    }

    public IssueApi issueApi() {
        return new IssueApi();
    }

    public RepositoryApi repositoryApi() {
        return new RepositoryApi();
    }

    public void refreshMilestones() {
        try {
            milestones = issueGetAllMilestones();
        } catch (ApiException e1) {
            e1.printStackTrace();
        }
    }
    public void refreshLabels() {
        try {
        	labels = issueGetAllLabels();
        } catch (ApiException e2) {
        	e2.printStackTrace();
        }
    }
    public void refreshMembers() {
        ArrayList<User> memberList = new ArrayList<User>();
        try {
            memberList.addAll(repoListAllCollaborators());
        } catch (ApiException e1) {
            e1.printStackTrace();
        }
        members = Collections.unmodifiableList(memberList);
    }
    public void update() throws IOException {
        refreshMilestones();
        refreshLabels();
        refreshMembers();
    }

    public List<Repository> userCurrentListRepos() throws ApiException {
        return userApi().userCurrentListRepos(null, null);
    }

    public List<Milestone> getMilestones() {
        return Collections.unmodifiableList(milestones);
    }

    public List<Label> getLabels() {
    	return Collections.unmodifiableList(labels);
    }
    public List<User> getRepositoryCollaborators() {
        return Collections.unmodifiableList(members);
    }

    public List<User> repoListAllCollaborators() throws ApiException {
        return repositoryApi().repoListCollaborators(owner, repo, null, null);
    }

    public List<Label> issueGetAllLabels() throws ApiException {
    	return issueApi().issueListLabels(owner, repo, 0, 0);
    }
    public List<Milestone> issueGetMilestones(IssueState state, String filterByName) throws ApiException {
        return issueApi().issueGetMilestonesList(owner, repo, state.toString(), filterByName, null, null);
    }

    public List<Milestone> issueGetAllMilestones() throws ApiException {
        return issueGetMilestones(IssueState.STATE_ANY, null);
    }

    public List<Milestone> issueGetOpenMilestones() throws ApiException {
        return issueGetMilestones(IssueState.STATE_OPENED, null);
    }

    /**
     * Get issues list by state.
     * 
     * @param state
     * @return
     * @throws ApiException
     */
    public List<Issue> repoGetIssues(IssueState state, String labels, Integer page, String query, String milestones) throws ApiException {
        return issueApi().issueListIssues(owner, repo, state.toString(), labels, "", query, milestones, page, 0);
    }

    public List<Issue> repoGetIssues(String state, String labels, Integer page, String query, String milestones) throws ApiException {
        return issueApi().issueListIssues(owner, repo, state, labels, query, "", milestones, page, 0);
    }

    public List<Issue> repoGetAllIssues() throws ApiException {
        return repoGetIssues(IssueState.STATE_ANY, "", 0, "", "");
    }

    public List<Issue> repoGetOpenIssues() throws ApiException {
        return repoGetIssues(IssueState.STATE_OPENED, "", 0, "", "");
    }

    /**
     * Get a specific Issue.
     * 
     * @param issueId : issue id
     * @return Issue
     * @throws ApiException
     */
    public Issue issueGetIssue(Long issueId) throws ApiException {
        return issueApi().issueGetIssue(owner, repo, issueId);
    }

    /**
     * Get all comments attached to an issue.
     * 
     * @param issue Issue to retrieve comments from.
     * @param since
     * @return List<Comment>
     * @throws ApiException
     */
    public List<Comment> issueGetComments(Issue issue, String since, String before) throws ApiException {
        return issueApi().issueGetComments(owner, repo, issue.getNumber(), null, null); // FIXME: support since and before
    }

    /**
     * Get all comments attached to an issue identified by its id.
     * 
     * @param issueId
     * @param since
     * @return
     * @throws ApiException
     */
    public List<Comment> issueGetComments(Long issueId, String since) throws ApiException {
        return issueGetComments(issueGetIssue(issueId), since, null); // FIXME: support since and before
    }

    public List<Comment> issueGetComments(Issue issue) throws ApiException {
        return issueGetComments(issue, null, null);
    }
    
    /** Add a new comment to an issue.
     * 
     * @param issueId
     * @param body
     * @return
     * @throws ApiException
     */
    public Comment issueAddComment(Long issueId, CreateIssueCommentOption body) throws ApiException {
    	return issueApi().issueCreateComment(owner, repo, issueId, body);
    }
    
    public Comment issueAddComment(Issue issue, CreateIssueCommentOption body) throws ApiException {
    	return issueAddComment(issue.getId(), body);
    }
    
    /** Create an issue.
     * 
     * @param body
     * @return
     * @throws ApiException
     */
    public Issue createIssue(CreateIssueOption body) throws ApiException {
    	return issueApi().issueCreateIssue(owner, repo, body);
    }
    public Issue editIssue(Long issueId, EditIssueOption body) throws ApiException {
    	return issueApi().issueEditIssue(owner, repo, issueId, body);
    }
    public List<Label> issueReplaceLabels(Long issueId, IssueLabelsOption labels) throws ApiException {
    	return issueApi().issueReplaceLabels(owner, repo, issueId, labels);
    }
}