package eu.dnetlib.openaire.usermanagement.api;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import eu.dnetlib.openaire.user.pojos.ManagerVerification;
import eu.dnetlib.openaire.user.utils.EmailSender;
import eu.dnetlib.openaire.usermanagement.dto.Role;
import eu.dnetlib.openaire.usermanagement.utils.JsonUtils;
import eu.dnetlib.openaire.usermanagement.utils.RegistryCalls;
import eu.dnetlib.openaire.usermanagement.utils.VerificationUtils;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestBody;

import javax.mail.MessagingException;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

@Component(value = "RegistryService")
@Path("/registry")
public class RegistryService {

    private static final Logger logger = Logger.getLogger(RegistryService.class);

    @Autowired
    private RegistryCalls calls;

    @Autowired
    private JsonUtils jsonUtils;

    @Autowired
    private EmailSender emailSender;

    @Autowired
    private VerificationUtils verificationUtils;


    /**
     * Subscribe to a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/subscribe/{type}/{id}")
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("isAuthenticated()")
    public Response subscribe(@PathParam("type") String type, @PathParam("id") String id) {
        Integer coPersonId = calls.getCoPersonIdByIdentifier();
        Integer couId = calls.getCouId(type, id);
        if (couId != null) {
            Integer role = calls.getRoleId(coPersonId, couId);
            calls.assignMemberRole(coPersonId, couId, role);
            return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Role has been assigned").toString()).type(MediaType.APPLICATION_JSON).build();
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Subscribe from type(Community, etc.) with id(ee, egi, etc.).
     * If user has manager role for this entity, it will be removed too.
     */
    @Path("/unsubscribe/{type}/{id}")
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("isAuthenticated()")
    public Response unsubscribe(@PathParam("type") String type, @PathParam("id") String id) {
        Integer coPersonId = calls.getCoPersonIdByIdentifier();
        Integer couId = calls.getCouId(type, id);
        if (couId != null) {
            Integer role = calls.getRoleId(coPersonId, couId);
            if (role != null) {
                calls.removeAdminRole(coPersonId, couId);
                calls.removeMemberRole(coPersonId, couId, role);
                return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Role has been removed").toString()).type(MediaType.APPLICATION_JSON).build();
            } else
                return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("User does not have this role").toString()).type(MediaType.APPLICATION_JSON).build();
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Create a new role with the given name and description.
     **/
    @Path("/createRole")
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.USER_ADMIN)")
    public Response createRole(@RequestBody Role role) {
        calls.createRole(role);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Role has been created").toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Invite user with email to manage a type(Community, etc.) with id(ee, egi, etc.)
     * Auto generated link and code will be sent as response.
     */
    @Path("/invite/{type}/{id}/manager/{email}")
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.USER_ADMIN, @AuthoritiesService.PORTAL_ADMIN, " +
            "@AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response inviteUser(@PathParam("type") String type, @PathParam("id") String id, @PathParam("email") String email, @RequestBody String body) {
        Integer couId = calls.getCouId(type, id);
        if (couId != null) {
            Integer coPersonId = calls.getCoPersonIdByEmail(email);
            if (calls.getUserAdminGroup(coPersonId, couId) == null) {
                JsonObject invitation = verificationUtils.createInvitation(email, type, id);
                String name = calls.getUserNames(coPersonId);
                JsonObject details = new JsonParser().parse(body).getAsJsonObject();
                String link = details.get("link").getAsString() + "/" + invitation.get("link").getAsString();
                String subject = "Invite to manage " + details.get("name").getAsString();
                String message = "<p>Hello " + name + ",</p>" +
                        "<p> You have been invited to manage " + details.get("name").getAsString() + ". " +
                        "Use the verification code below to accept the invitation." +
                        "</p>" +
                        "<p>" +
                        "The verification code is " + invitation.get("code").getAsString() +
                        "</p>" +
                        "Click the URL below and proceed with the process." +
                        "<p><a href=" + link + ">" + link + "</a></p>" +
                        "<p>Thank you,</p>" +
                        "<p>OpenAIRE technical team</p>";
                try {
                    emailSender.sendEmail(email, subject, message);
                    return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(invitation).toString()).type(MediaType.APPLICATION_JSON).build();
                } catch (MessagingException e) {
                    logger.error(e.getMessage());
                    verificationUtils.deleteVerification(invitation.get("link").getAsString());
                    return Response.status(HttpStatus.BAD_REQUEST.value()).entity(jsonUtils.createResponse("Email sent failed").toString()).type(MediaType.APPLICATION_JSON).build();
                }
            } else {
                return Response.status(HttpStatus.CONFLICT.value()).entity(jsonUtils.createResponse("User has been already manager of this " + type).toString()).type(MediaType.APPLICATION_JSON).build();
            }
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Cancel invitation to user with email for managing a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/invite/{type}/{id}/manager/{email}")
    @DELETE
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.USER_ADMIN, @AuthoritiesService.PORTAL_ADMIN, " +
            "@AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response cancelUserInvitations(@PathParam("type") String type, @PathParam("id") String id, @PathParam("email") String email) {
        Integer couId = calls.getCouId(type, id);
        if (couId != null) {
            verificationUtils.deleteUserVerifications(email, type, id);
            return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Invitations have been deleted").toString()).type(MediaType.APPLICATION_JSON).build();
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Get the invited managers for a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/invite/{type}/{id}/managers/")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.USER_ADMIN, @AuthoritiesService.PORTAL_ADMIN, " +
            "@AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response getInvitedManagers(@PathParam("type") String type, @PathParam("id") String id) {
        JsonArray invited = verificationUtils.getInvitedUsers(type, id);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(invited).toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Get the verification with a specific id only if it refers to the logged in user
     */
    @Path("verification/{id}")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("isAuthenticated()")
    public Response getVerification(@PathParam("id") String id) {
        ManagerVerification managerVerification = verificationUtils.getVerification(id);
        if (managerVerification != null) {
            if (calls.getCoPersonIdByEmail(managerVerification.getEmail()).equals(calls.getCoPersonIdByIdentifier())) {
                return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(jsonUtils.createVerification(managerVerification)).toString()).type(MediaType.APPLICATION_JSON).build();
            } else {
                return Response.status(HttpStatus.FORBIDDEN.value()).entity(jsonUtils.createResponse("Forbidden verification").toString()).type(MediaType.APPLICATION_JSON).build();
            }
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Verification has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Delete the verification with a specific id.
     */
    @Path("verification/{id}")
    @DELETE
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("isAuthenticated() && @VerificationUtils.ownedVerification(#id)")
    public Response deleteVerification(@PathParam("id") String id) {
        if (verificationUtils.getVerification(id) != null) {
            verificationUtils.deleteVerification(id);
            return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(jsonUtils.createResponse("Verification deleted")).toString()).type(MediaType.APPLICATION_JSON).build();
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse(jsonUtils.createResponse("Verification has not been found")).toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Verify the verification with the specific id, if the code is correct and it refers to the logged in user.
     * Manager role is assigned to this user, along with the member role.
     */
    @Path("verification/{id}")
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("isAuthenticated()")
    public Response verify(@PathParam("id") String id, @RequestBody String code) {
        ManagerVerification managerVerification = verificationUtils.getVerification(id);
        if (managerVerification != null) {
            Integer coPersonId = calls.getCoPersonIdByEmail(managerVerification.getEmail());
            if (coPersonId != null) {
                if (coPersonId.equals(calls.getCoPersonIdByIdentifier())) {
                    if (managerVerification.getVerificationCode().equals(code)) {
                        verificationUtils.deleteRelatedVerifications(managerVerification);
                        Integer couId = calls.getCouId(managerVerification.getType(), managerVerification.getEntity());
                        if (couId != null) {
                            Integer role = calls.getRoleId(coPersonId, couId);
                            calls.assignMemberRole(coPersonId, couId, role);
                            if (calls.getUserAdminGroup(coPersonId, couId) == null) {
                                calls.assignAdminRole(coPersonId, couId);
                                return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Admin role has been assigned").toString()).type(MediaType.APPLICATION_JSON).build();
                            } else {
                                return Response.status(HttpStatus.CONFLICT.value()).entity(jsonUtils.createResponse("User is already admin of this cou").toString()).type(MediaType.APPLICATION_JSON).build();
                            }
                        } else {
                            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
                        }
                    } else {
                        return Response.status(HttpStatus.FORBIDDEN.value()).entity(jsonUtils.createResponse("Verification code is wrong").toString()).type(MediaType.APPLICATION_JSON).build();
                    }
                } else {
                    return Response.status(HttpStatus.FORBIDDEN.value()).entity(jsonUtils.createResponse("Forbidden verification").toString()).type(MediaType.APPLICATION_JSON).build();
                }
            } else {
                return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("User has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
            }
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Verification has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Remove the manager role from user with email for a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/manager/{email}")
    @DELETE
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.USER_ADMIN," +
            "@AuthoritiesService.PORTAL_ADMIN, @AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response removeManagerRole(@PathParam("type") String type, @PathParam("id") String
            id, @PathParam("email") String email) {
        Integer coPersonId = calls.getCoPersonIdByEmail(email);
        if (coPersonId != null) {
            Integer couId = calls.getCouId(type, id);
            if (couId != null) {
                calls.removeAdminRole(coPersonId, couId);
                return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse("Role has been removed").toString()).type(MediaType.APPLICATION_JSON).build();
            } else {
                return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("Role has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
            }
        } else {
            return Response.status(HttpStatus.NOT_FOUND.value()).entity(jsonUtils.createResponse("User has not been found").toString()).type(MediaType.APPLICATION_JSON).build();
        }
    }

    /**
     * Get the names of the subscribers of a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/subscribers")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.PORTAL_ADMIN," +
            "@AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response getSubscribers(@PathParam("type") String type, @PathParam("id") String id) {
        Integer couId = calls.getCouId(type, id);
        JsonArray subscribers = calls.getUserNamesByCouId(couId, false);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(subscribers).toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Get the emails of the subscribers of a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/subscribers/email")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @PreAuthorize("hasAnyAuthority(@AuthoritiesService.SUPER_ADMIN, @AuthoritiesService.PORTAL_ADMIN," +
            "@AuthoritiesService.curator(#type), @AuthoritiesService.manager(#type, #id))")
    public Response getSubscribersEmail(@PathParam("type") String type, @PathParam("id") String id) {
        Integer couId = calls.getCouId(type, id);
        JsonArray subscribers = calls.getUserEmailByCouId(couId, false);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(subscribers).toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Get the number of the subscribers of a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/subscribers/count")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getSubscribersCount(@PathParam("type") String type, @PathParam("id") String id) {
        Integer couId = calls.getCouId(type, id);
        int count = calls.getUserNamesByCouId(couId, false).size();
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(count).toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Get the names of the managers of a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/managers")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getManagers(@PathParam("type") String type, @PathParam("id") String id) {
        Integer couId = calls.getCouId(type, id);
        JsonArray managers = calls.getUserNamesByCouId(couId, true);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(managers).toString()).type(MediaType.APPLICATION_JSON).build();
    }

    /**
     * Get the emails of the managers of a type(Community, etc.) with id(ee, egi, etc.)
     */
    @Path("/{type}/{id}/managers/email")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getManagersEmail(@PathParam("type") String type, @PathParam("id") String id) {
        Integer couId = calls.getCouId(type, id);
        JsonArray managers = calls.getUserEmailByCouId(couId, true);
        return Response.status(HttpStatus.OK.value()).entity(jsonUtils.createResponse(managers).toString()).type(MediaType.APPLICATION_JSON).build();
    }
}