/*
 * Copyright 2021 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 */
package com.myspace.demo;

import java.net.URI;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;

import org.jbpm.util.JsonSchemaUtil;
import org.kie.kogito.process.Process;
import org.kie.kogito.process.ProcessInstance;
import org.kie.kogito.process.WorkItem;
import org.kie.kogito.process.ProcessService;
import org.kie.kogito.process.workitem.Attachment;
import org.kie.kogito.process.workitem.AttachmentInfo;
import org.kie.kogito.process.workitem.Comment;
import org.kie.kogito.process.workitem.Policies;
import org.kie.kogito.process.workitem.TaskModel;
import org.kie.kogito.auth.IdentityProvider;
import org.kie.kogito.auth.IdentityProviders;
import org.kie.kogito.auth.SecurityPolicy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.PatchMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.http.ResponseEntity;
import org.springframework.http.HttpStatus;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

import io.swagger.v3.oas.annotations.Operation;

@RestController
@RequestMapping("/$name$")
public class $Type$Resource {

    Process<$Type$> process;

    @Autowired
    ProcessService processService;

    @PostMapping(produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public ResponseEntity<$Type$Output> createResource_$name$(@RequestHeader HttpHeaders httpHeaders,
                                                              @RequestParam(value = "businessKey", required = false) String businessKey,
                                                              @RequestBody(required = false) $Type$Input resource,
                                                              UriComponentsBuilder uriComponentsBuilder) {
        ProcessInstance<$Type$> pi = processService.createProcessInstance(process,
                                                                          businessKey,
                                                                          Optional.ofNullable(resource).orElse(new $Type$Input()).toModel(),
                                                                          httpHeaders,
                                                                          httpHeaders.getOrEmpty("X-KOGITO-StartFromNode").stream().findFirst().orElse(null));
        return ResponseEntity.created(uriComponentsBuilder.path("/$name$/{id}").buildAndExpand(pi.id()).toUri())
                .body(pi.checkError().variables().toModel());
    }

    @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public List<$Type$Output> getResources_$name$() {
        return processService.getProcessInstanceOutput(process);
    }

    @GetMapping(value = "/schema", produces = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public Map<String, Object> getResourceSchema_$name$() {
        return JsonSchemaUtil.load(this.getClass().getClassLoader(), process.id());
    }

    @GetMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public $Type$Output getResource_$name$(@PathVariable("id") String id) {
        return processService.findById(process, id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
    }

    @DeleteMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public $Type$Output deleteResource_$name$(@PathVariable("id") final String id) {
        return processService.delete(process, id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
    }

    @PutMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE,
            consumes = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public $Type$Output updateModel_$name$(@PathVariable("id") String id, @RequestBody(required = false) $Type$Input resource) {
        return processService.update(process, id, resource.toModel()).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
    }
    
    @PatchMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE,
            consumes = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public $Type$Output updateModelPartial_$name$(@PathVariable("id") String id, @RequestBody(required = false) $Type$Input resource) {
        return processService.updatePartial(process, id, resource.toModel()).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
    }

    @GetMapping(value = "/{id}/tasks", produces = MediaType.APPLICATION_JSON_VALUE)
    @Operation(summary = "$documentation$", description = "$processInstanceDescription$")
    public List<TaskModel> getTasks_$name$(@PathVariable("id") String id,
                                           @RequestParam(value = "user", required = false) final String user,
                                           @RequestParam(value = "group", required = false) final List<String> groups) {
        return processService.getTasks(process, id, SecurityPolicy.of(IdentityProviders.of(user, groups)))
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND))
                .stream()
                .map($TaskModelFactory$::from)
                .collect(Collectors.toList());
    }
}