/** @file
  This file is cloned from DMTF libredfish library tag v1.0.0 and maintained
  by EDKII.

//----------------------------------------------------------------------------
// Copyright Notice:
// Copyright 2017 Distributed Management Task Force, Inc. All rights reserved.
// License: BSD 3-Clause License. For full text see link: https://github.com/DMTF/libredfish/LICENSE.md
//----------------------------------------------------------------------------

  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent

**/
#include <redfishPayload.h>

static redfishPayload* getOpResult(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode);
static redfishPayload* collectionEvalOp(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode);
static redfishPayload* arrayEvalOp(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode);
static redfishPayload* createCollection(redfishService* service, size_t count, redfishPayload** payloads);
static json_t*         json_object_get_by_index(json_t* json, size_t index);

bool isPayloadCollection(redfishPayload* payload)
{
    json_t* members;
    json_t* count;

    if(!payload || !json_is_object(payload->json))
    {
        return false;
    }
    members = json_object_get(payload->json, "Members");
    count = json_object_get(payload->json, "Members@odata.count");
    return ((members != NULL) && (count != NULL));
}

size_t getCollectionSize(redfishPayload* payload)
{
    json_t* members;
    json_t* count;

    if(!payload || !json_is_object(payload->json))
    {
        return 0;
    }
    members = json_object_get(payload->json, "Members");
    count = json_object_get(payload->json, "Members@odata.count");
    if(!members || !count)
    {
        return 0;
    }
    return (size_t)json_integer_value(count);
}

bool isPayloadArray(redfishPayload* payload)
{
    if(!payload || !json_is_array(payload->json))
    {
        return false;
    }
    return true;
}

char* payloadToString(redfishPayload* payload, bool prettyPrint)
{
    size_t flags = 0;
    if(!payload)
    {
        return NULL;
    }
    if(prettyPrint)
    {
        flags = JSON_INDENT(2);
    }
    return json_dumps(payload->json, flags);
}

redfishPayload* createRedfishPayload(json_t* value, redfishService* service)
{
    redfishPayload* payload;
    payload = (redfishPayload*)malloc(sizeof(redfishPayload));
    if(payload != NULL)
    {
        payload->json = value;
        payload->service = service;
    }
    return payload;
}

redfishPayload* getPayloadByNodeName(redfishPayload* payload, const char* nodeName, EFI_HTTP_STATUS_CODE** StatusCode)
{
    json_t* value;
    json_t* odataId;
    const char* uri;

    if(!payload || !nodeName || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;

    value = json_object_get(payload->json, nodeName);
    if(value == NULL)
    {
        return NULL;
    }
    json_incref(value);
    if(json_object_size(value) == 1)
    {
        odataId = json_object_get(value, "@odata.id");
        if(odataId != NULL)
        {
            json_incref(odataId);
            uri = json_string_value(odataId);
            json_decref(value);
            value = getUriFromService(payload->service, uri, StatusCode);
            json_decref(odataId);
            if(value == NULL || *StatusCode == NULL)
            {
              return NULL;
            }
        }
    }
    if (*StatusCode == NULL || (**StatusCode >= HTTP_STATUS_200_OK && **StatusCode <= HTTP_STATUS_206_PARTIAL_CONTENT)) {
      if(json_is_string(value))
      {
          odataId = json_object();
          json_object_set(odataId, nodeName, value);
          json_decref(value);
          value = odataId;
      }
    }

    return createRedfishPayload(value, payload->service);
}

redfishPayload* getPayloadByIndex(redfishPayload* payload, size_t index, EFI_HTTP_STATUS_CODE** StatusCode)
{
    json_t* value = NULL;
    json_t* odataId;
    const char* uri;
    BOOLEAN FromServerFlag = FALSE;

    if(!payload || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;

    if(isPayloadCollection(payload))
    {
        redfishPayload* members = getPayloadByNodeName(payload, "Members", StatusCode);
        if ((*StatusCode == NULL && members == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
          return members;
        }

        if (*StatusCode != NULL) {
          //
          // The Payload (members) are retrived from server.
          //
          FreePool (*StatusCode);
          *StatusCode = NULL;
          FromServerFlag = TRUE;
        }

        redfishPayload* ret = getPayloadByIndex(members, index, StatusCode);
        if (*StatusCode == NULL && ret != NULL && FromServerFlag) {
          //
          // In such a case, the Redfish resource is parsed from the input payload (members) directly.
          // Since the members are retrived from server, we still return HTTP_STATUS_200_OK.
          //
          *StatusCode = AllocateZeroPool (sizeof (EFI_HTTP_STATUS_CODE));
          if (*StatusCode == NULL) {
            ret = NULL;
          } else {
            **StatusCode = HTTP_STATUS_200_OK;
          }
        }

        cleanupPayload(members);
        return ret;
    }

    if(json_is_array(payload->json))
    {
        //
        // The valid range for index is from 0 to the return value of json_array_size() minus 1
        //
        value = json_array_get(payload->json, index);
    }
    else if(json_is_object(payload->json))
    {
        value = json_object_get_by_index(payload->json, index);
    }

    if(value == NULL)
    {
        return NULL;
    }

    json_incref(value);
    if(json_object_size(value) == 1)
    {
        odataId = json_object_get(value, "@odata.id");
        if(odataId != NULL)
        {
            uri = json_string_value(odataId);
            json_decref(value);
            value = getUriFromService(payload->service, uri, StatusCode);
            if(value == NULL)
            {
                return NULL;
            }
        }
    }
    return createRedfishPayload(value, payload->service);
}

redfishPayload* getPayloadForPath(redfishPayload* payload, redPathNode* redpath, EFI_HTTP_STATUS_CODE** StatusCode)
{
    redfishPayload* ret = NULL;
    redfishPayload* tmp;

    if(!payload || !redpath || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;
    BOOLEAN FromServerFlag = FALSE;

    if(redpath->nodeName)
    {
        ret = getPayloadByNodeName(payload, redpath->nodeName, StatusCode);
        if ((*StatusCode == NULL && ret == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
            //
            // Any error happen, return directly.
            //
          return ret;
        }
    }
    else if(redpath->isIndex)
    {
        ASSERT (redpath->index >= 1);
        ret = getPayloadByIndex(payload, redpath->index - 1, StatusCode);
        if ((*StatusCode == NULL && ret == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
            //
            // Any error happen, return directly.
            //
          return ret;
        }
    }
    else if(redpath->op)
    {
        ret = getOpResult(payload, redpath->propName, redpath->op, redpath->value, StatusCode);
        if ((*StatusCode == NULL && ret == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
            //
            // Any error happen, return directly.
            //
          return ret;
        }
    }
    else
    {
        return NULL;
    }

    if(redpath->next == NULL || ret == NULL)
    {
        return ret;
    }
    else
    {
        if (*StatusCode != NULL) {
          FreePool (*StatusCode);
          *StatusCode = NULL;
          FromServerFlag = TRUE;
        }

        tmp = getPayloadForPath(ret, redpath->next, StatusCode);
        if (*StatusCode == NULL && tmp != NULL && FromServerFlag) {
          //
          // In such a case, the Redfish resource is parsed from the input payload (ret) directly.
          // Since the ret are retrived from server, we still return HTTP_STATUS_200_OK.
          //
          *StatusCode = AllocateZeroPool (sizeof (EFI_HTTP_STATUS_CODE));
          if (*StatusCode == NULL) {
            tmp = NULL;
          } else {
            **StatusCode = HTTP_STATUS_200_OK;
          }
        }

        cleanupPayload(ret);
        return tmp;
    }
}

redfishPayload* getPayloadForPathString(redfishPayload* payload, const char* string, EFI_HTTP_STATUS_CODE** StatusCode)
{
    redPathNode* redpath;
    redfishPayload* ret;

    if(!string || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;

    redpath = parseRedPath(string);
    if(redpath == NULL)
    {
        return NULL;
    }
    ret = getPayloadForPath(payload, redpath, StatusCode);
    cleanupRedPath(redpath);
    return ret;
}

redfishPayload* patchPayload(redfishPayload* target, redfishPayload* payload, EFI_HTTP_STATUS_CODE** StatusCode)
{
  json_t* json;
  char* content;
  char* uri;

  if(!target || !payload || StatusCode == NULL)
  {
    return NULL;
  }

  *StatusCode = NULL;

  json = json_object_get(target->json, "@odata.id");
  if(json == NULL)
  {
    return NULL;
  }
  uri = strdup(json_string_value(json));

  content = json_dumps(payload->json, 0);
  json_decref(json);

  json = patchUriFromService(target->service, uri, content, StatusCode);
  free(uri);
  free(content);
  if(json == NULL)
  {
    return NULL;
  }

  return createRedfishPayload(json, target->service);
}

redfishPayload* postContentToPayload(redfishPayload* target, const char* data, size_t dataSize, const char* contentType, EFI_HTTP_STATUS_CODE** StatusCode)
{
    json_t* json;
    char* uri;

    if(!target || !data || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;

    json = json_object_get(target->json, "@odata.id");
    if(json == NULL)
    {
        json = json_object_get(target->json, "target");
        if(json == NULL)
        {
            return NULL;
        }
    }
    uri = strdup(json_string_value(json));
    json = postUriFromService(target->service, uri, data, dataSize, contentType, StatusCode);
    free(uri);
    if(json == NULL)
    {
        return NULL;
    }

    return createRedfishPayload(json, target->service);
}

redfishPayload* postPayload(redfishPayload* target, redfishPayload* payload, EFI_HTTP_STATUS_CODE** StatusCode)
{
    char* content;
    redfishPayload* ret;

    if(!target || !payload || StatusCode == NULL)
    {
        return NULL;
    }

    *StatusCode = NULL;

    if(!json_is_object(payload->json))
    {
        return NULL;
    }
    content = payloadToString(payload, false);
    ret = postContentToPayload(target, content, strlen(content), NULL, StatusCode);
    free(content);
    return ret;
}

void cleanupPayload(redfishPayload* payload)
{
    if(!payload)
    {
        return;
    }
    json_decref(payload->json);
    //Don't free payload->service, let the caller handle cleaning up the service
    free(payload);
}

static redfishPayload* getOpResult(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode)
{
    const char* propStr;
    json_t* stringProp;
    bool ret = false;
    redfishPayload* prop;
    long long intVal, intPropVal;
    json_type jsonType;

    if(isPayloadCollection(payload))
    {
        return collectionEvalOp(payload, propName, op, value, StatusCode);
    }
    if(isPayloadArray(payload))
    {
        return arrayEvalOp(payload, propName, op, value, StatusCode);
    }

    prop = getPayloadByNodeName(payload, propName, StatusCode);
    if ((*StatusCode == NULL && prop == NULL) ||
        (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
      return prop;
    }
    stringProp = prop->json;
    jsonType = prop->json->type;
    switch(jsonType)
    {
        case JSON_OBJECT:
            stringProp = json_object_get(prop->json, propName);
        case JSON_STRING:
            if(strcmp(op, "=") == 0)
            {
                propStr = json_string_value(stringProp);
                if(propStr == NULL)
                {
                    cleanupPayload(prop);
                    return NULL;
                }
                ret = (strcmp(propStr, value) == 0);
            } else if(strcmp(op, "~") == 0)
            {
                propStr = json_string_value(stringProp);
                if(propStr == NULL)
                {
                    cleanupPayload(prop);
                    return NULL;
                }
                ret = (strcasecmp(propStr, value) == 0);
            }
            break;
        case JSON_TRUE:
            if(strcmp(op, "=") == 0)
            {
                ret = (strcmp(value, "true") == 0);
            }
            break;
        case JSON_FALSE:
            if(strcmp(op, "=") == 0)
            {
                ret = (strcmp(value, "false") == 0);
            }
            break;
        case JSON_INTEGER:
            intPropVal = json_integer_value(prop->json);
            intVal = strtoll(value, NULL, 0);
            if(strcmp(op, "=") == 0)
            {
                ret = (intPropVal == intVal);
            }
            else if(strcmp(op, "<") == 0)
            {
                ret = (intPropVal < intVal);
            }
            else if(strcmp(op, ">") == 0)
            {
                ret = (intPropVal > intVal);
            }
            else if(strcmp(op, "<=") == 0)
            {
                ret = (intPropVal <= intVal);
            }
            else if(strcmp(op, ">=") == 0)
            {
                ret = (intPropVal >= intVal);
            }
            break;
        default:
            break;
    }
    cleanupPayload(prop);
    if(ret)
    {
        return payload;
    }
    else
    {
        return NULL;
    }
}

static redfishPayload* collectionEvalOp(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode)
{
    redfishPayload* ret;
    redfishPayload* tmp;
    redfishPayload* members;
    redfishPayload** valid;
    size_t validMax;
    size_t validCount = 0;
    size_t i;

    validMax = getCollectionSize(payload);
    if(validMax == 0)
    {
        return NULL;
    }

    valid = (redfishPayload**)calloc(validMax, sizeof(redfishPayload*));
    if(valid == NULL)
    {
        return NULL;
    }
    /*Technically getPayloadByIndex would do this, but this optimizes things*/
    members = getPayloadByNodeName(payload, "Members", StatusCode);
    if ((*StatusCode == NULL && members == NULL) ||
        (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
      return members;
    }

    for(i = 0; i < validMax; i++)
    {
        if (*StatusCode != NULL) {
          FreePool (*StatusCode);
          *StatusCode = NULL;
        }

        tmp = getPayloadByIndex(members, i, StatusCode);
        if ((*StatusCode == NULL && tmp == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
          return tmp;
        }

        if (*StatusCode != NULL) {
          FreePool (*StatusCode);
          *StatusCode = NULL;
        }

        valid[validCount] = getOpResult(tmp, propName, op, value, StatusCode);
        /*
        if ((*StatusCode == NULL && valid[validCount] == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
          return valid[validCount];
        }
        */
        if(valid[validCount] != NULL)
        {
            validCount++;
        }
        else
        {
            cleanupPayload(tmp);
        }
    }
    cleanupPayload(members);
    if(validCount == 0)
    {
        free(valid);
        return NULL;
    }
    if(validCount == 1)
    {
        ret = valid[0];
        free(valid);
        return ret;
    }
    else
    {
        ret = createCollection(payload->service, validCount, valid);
        free(valid);
        return ret;
    }
}

static redfishPayload* arrayEvalOp(redfishPayload* payload, const char* propName, const char* op, const char* value, EFI_HTTP_STATUS_CODE** StatusCode)
{
    redfishPayload* ret;
    redfishPayload* tmp;
    redfishPayload** valid;
    size_t validMax;
    size_t validCount = 0;
    size_t i;

    validMax = json_array_size(payload->json);
    if(validMax == 0)
    {
        return NULL;
    }

    valid = (redfishPayload**)calloc(validMax, sizeof(redfishPayload*));
    if(valid == NULL)
    {
        return NULL;
    }
    for(i = 0; i < validMax; i++)
    {
        if (*StatusCode != NULL) {
          FreePool (*StatusCode);
          *StatusCode = NULL;
        }

        tmp = getPayloadByIndex(payload, i, StatusCode);
        if ((*StatusCode == NULL && tmp == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
          return tmp;
        }

        if (*StatusCode != NULL) {
          FreePool (*StatusCode);
          *StatusCode = NULL;
        }

        valid[validCount] = getOpResult(tmp, propName, op, value, StatusCode);
        /*
        if ((*StatusCode == NULL && valid[validCount] == NULL) ||
            (*StatusCode != NULL && (**StatusCode < HTTP_STATUS_200_OK || **StatusCode > HTTP_STATUS_206_PARTIAL_CONTENT))) {
          return valid[validCount];
        }
        */

        if(valid[validCount] != NULL)
        {
            validCount++;
        }
        else
        {
            cleanupPayload(tmp);
        }
    }
    if(validCount == 0)
    {
        free(valid);
        return NULL;
    }
    if(validCount == 1)
    {
        ret = valid[0];
        free(valid);
        return ret;
    }
    else
    {
        ret = createCollection(payload->service, validCount, valid);
        free(valid);
        return ret;
    }
}

static redfishPayload* createCollection(redfishService* service, size_t count, redfishPayload** payloads)
{
    redfishPayload* ret;
    json_t* collectionJson = json_object();
    json_t* jcount = json_integer((json_int_t)count);
    json_t* members = json_array();
    size_t i;

    if(!collectionJson)
    {
        return NULL;
    }
    if(!members)
    {
        json_decref(collectionJson);
        return NULL;
    }
    json_object_set(collectionJson, "Members@odata.count", jcount);
    json_decref(jcount);
    for(i = 0; i < count; i++)
    {
        json_array_append(members, payloads[i]->json);
        cleanupPayload(payloads[i]);
    }
    json_object_set(collectionJson, "Members", members);
    json_decref(members);

    ret = createRedfishPayload(collectionJson, service);
    return ret;
}

static json_t* json_object_get_by_index(json_t* json, size_t index)
{
    void* iter;
    size_t i;

    iter = json_object_iter(json);
    for(i = 0; i < index; i++)
    {
        iter = json_object_iter_next(json, iter);
        if(iter == NULL) break;
    }
    if(iter == NULL)
    {
        return NULL;
    }
    return json_object_iter_value(iter);
}
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