package com.atlassian.bitbucket.internal.repository.refchange.web;

import com.atlassian.soy.renderer.SoyException;
import com.atlassian.soy.renderer.SoyTemplateRenderer;
import com.atlassian.bitbucket.repository.refchange.RefChangeSettings;
import com.atlassian.bitbucket.repository.refchange.RefChangeSettingsService;
import com.atlassian.bitbucket.internal.repository.refchange.PluginMetadata;
import com.atlassian.bitbucket.repository.Repository;
import com.atlassian.bitbucket.repository.RepositoryService;
import com.atlassian.bitbucket.permission.Permission;
import com.atlassian.bitbucket.permission.PermissionValidationService;
import com.atlassian.webresource.api.assembler.PageBuilderService;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;

public class RefChangeSettingsServlet extends HttpServlet {

    private final PageBuilderService pageBuilderService;
    private final RefChangeSettingsService refChangeSettingsService;
    private final RepositoryService repositoryService;
    private final SoyTemplateRenderer soyTemplateRenderer;
    private final PermissionValidationService validationService;

    public RefChangeSettingsServlet(PageBuilderService pageBuilderService,
                                    RefChangeSettingsService refChangeSettingsService,
                                    RepositoryService repositoryService,
                                    SoyTemplateRenderer soyTemplateRenderer,
                                    PermissionValidationService validationService) {
        this.pageBuilderService = pageBuilderService;
        this.refChangeSettingsService = refChangeSettingsService;
        this.repositoryService = repositoryService;
        this.soyTemplateRenderer = soyTemplateRenderer;
        this.validationService = validationService;
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String pathInfo = request.getPathInfo();
        if (Strings.isNullOrEmpty(pathInfo) || pathInfo.equals("/")) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        String[] pathParts = pathInfo.substring(1).split("/");
        if (pathParts.length != 2) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        String projectKey = pathParts[0];
        String repoSlug = pathParts[1];
        Repository repository = repositoryService.getBySlug(projectKey, repoSlug);
        if (repository == null) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        doView(repository, response);

    }

    private void doView(Repository repository, HttpServletResponse response)
            throws ServletException, IOException {
        validationService.validateForRepository(repository, Permission.REPO_ADMIN);
        RefChangeSettings refChangeSettings = refChangeSettingsService.get(repository);
        render(response,
                "bitbucket.page.refchange.settings.viewRefChangeSettings",
                ImmutableMap.<String, Object>builder()
                        .put("repository", repository)
                        .put("refChangeSettings", refChangeSettings)
                        .build()
        );
    }

    private void render(HttpServletResponse response, String templateName, Map<String, Object> data)
            throws IOException, ServletException {
        pageBuilderService.assembler().resources().requireContext("plugin.page.prevent.deletion");
        response.setContentType("text/html;charset=UTF-8");
        try {
            soyTemplateRenderer.render(response.getWriter(), PluginMetadata.getCompleteModuleKey("soy-templates"), templateName, data);
        } catch (SoyException e) {
            Throwable cause = e.getCause();
            if (cause instanceof IOException) {
                throw (IOException) cause;
            }
            throw new ServletException(e);
        }
    }
}