/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

#include "hdfs.h" 

void permission_disp(short permissions, char *rtr) {
  rtr[9] = '\0';
  int i;
  for(i=2;i>=0;i--)
    {
      short permissionsId = permissions >> (i * 3) & (short)7;
      char* perm;
      switch(permissionsId) {
      case 7:
        perm = "rwx"; break;
      case 6:
        perm = "rw-"; break;
      case 5:
        perm = "r-x"; break;
      case 4:
        perm = "r--"; break;
      case 3:
        perm = "-wx"; break;
      case 2:
        perm = "-w-"; break;
      case 1:
        perm = "--x"; break;
      case 0:
        perm = "---"; break;
      default:
        perm = "???";
      }
      strncpy(rtr, perm, 3);
      rtr+=3;
    }
} 

int main(int argc, char **argv) {

    hdfsFS fs = hdfsConnectNewInstance("default", 0);
    if(!fs) {
        fprintf(stderr, "Oops! Failed to connect to hdfs!\n");
        exit(-1);
    } 
 
    hdfsFS lfs = hdfsConnectNewInstance(NULL, 0);
    if(!lfs) {
        fprintf(stderr, "Oops! Failed to connect to 'local' hdfs!\n");
        exit(-1);
    } 

        const char* writePath = "/tmp/testfile.txt";
    {
        //Write tests
        
        
        hdfsFile writeFile = hdfsOpenFile(fs, writePath, O_WRONLY|O_CREAT, 0, 0, 0);
        if(!writeFile) {
            fprintf(stderr, "Failed to open %s for writing!\n", writePath);
            exit(-1);
        }
        fprintf(stderr, "Opened %s for writing successfully...\n", writePath);

        char* buffer = "Hello, World!";
        tSize num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer, strlen(buffer)+1);
        fprintf(stderr, "Wrote %d bytes\n", num_written_bytes);

        tOffset currentPos = -1;
        if ((currentPos = hdfsTell(fs, writeFile)) == -1) {
            fprintf(stderr, 
                    "Failed to get current file position correctly! Got %ld!\n",
                    currentPos);
            exit(-1);
        }
        fprintf(stderr, "Current position: %ld\n", currentPos);

        if (hdfsFlush(fs, writeFile)) {
            fprintf(stderr, "Failed to 'flush' %s\n", writePath); 
            exit(-1);
        }
        fprintf(stderr, "Flushed %s successfully!\n", writePath); 

        if (hdfsHFlush(fs, writeFile)) {
            fprintf(stderr, "Failed to 'hflush' %s\n", writePath);
            exit(-1);
        }
        fprintf(stderr, "HFlushed %s successfully!\n", writePath);

        hdfsCloseFile(fs, writeFile);
    }

    {
        //Read tests
        
        const char* readPath = "/tmp/testfile.txt";
        int exists = hdfsExists(fs, readPath);

        if (exists) {
          fprintf(stderr, "Failed to validate existence of %s\n", readPath);
          exit(-1);
        }

        hdfsFile readFile = hdfsOpenFile(fs, readPath, O_RDONLY, 0, 0, 0);
        if (!readFile) {
            fprintf(stderr, "Failed to open %s for reading!\n", readPath);
            exit(-1);
        }

        fprintf(stderr, "hdfsAvailable: %d\n", hdfsAvailable(fs, readFile));

        tOffset seekPos = 1;
        if(hdfsSeek(fs, readFile, seekPos)) {
            fprintf(stderr, "Failed to seek %s for reading!\n", readPath);
            exit(-1);
        }

        tOffset currentPos = -1;
        if((currentPos = hdfsTell(fs, readFile)) != seekPos) {
            fprintf(stderr, 
                    "Failed to get current file position correctly! Got %ld!\n", 
                    currentPos);
            exit(-1);
        }
        fprintf(stderr, "Current position: %ld\n", currentPos);

        static char buffer[32];
        tSize num_read_bytes = hdfsRead(fs, readFile, (void*)buffer, 
                sizeof(buffer));
        fprintf(stderr, "Read following %d bytes:\n%s\n", 
                num_read_bytes, buffer);

        num_read_bytes = hdfsPread(fs, readFile, 0, (void*)buffer, 
                sizeof(buffer));
        fprintf(stderr, "Read following %d bytes:\n%s\n", 
                num_read_bytes, buffer);

        hdfsCloseFile(fs, readFile);
    }

    int totalResult = 0;
    int result = 0;
    {
        //Generic file-system operations

        const char* srcPath = "/tmp/testfile.txt";
        const char* dstPath = "/tmp/testfile2.txt";

        fprintf(stderr, "hdfsCopy(remote-local): %s\n", ((result = hdfsCopy(fs, srcPath, lfs, srcPath)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsCopy(remote-remote): %s\n", ((result = hdfsCopy(fs, srcPath, fs, dstPath)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsMove(local-local): %s\n", ((result = hdfsMove(lfs, srcPath, lfs, dstPath)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsMove(remote-local): %s\n", ((result = hdfsMove(fs, srcPath, lfs, srcPath)) ? "Failed!" : "Success!"));
        totalResult += result;

        fprintf(stderr, "hdfsRename: %s\n", ((result = hdfsRename(fs, dstPath, srcPath)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsCopy(remote-remote): %s\n", ((result = hdfsCopy(fs, srcPath, fs, dstPath)) ? "Failed!" : "Success!"));
        totalResult += result;

        const char* slashTmp = "/tmp";
        const char* newDirectory = "/tmp/newdir";
        fprintf(stderr, "hdfsCreateDirectory: %s\n", ((result = hdfsCreateDirectory(fs, newDirectory)) ? "Failed!" : "Success!"));
        totalResult += result;

        fprintf(stderr, "hdfsSetReplication: %s\n", ((result = hdfsSetReplication(fs, srcPath, 2)) ? "Failed!" : "Success!"));
        totalResult += result;

        char buffer[256];
        const char *resp;
        fprintf(stderr, "hdfsGetWorkingDirectory: %s\n", ((resp = hdfsGetWorkingDirectory(fs, buffer, sizeof(buffer))) ? buffer : "Failed!"));
        totalResult += (resp ? 0 : 1);
        fprintf(stderr, "hdfsSetWorkingDirectory: %s\n", ((result = hdfsSetWorkingDirectory(fs, slashTmp)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsGetWorkingDirectory: %s\n", ((resp = hdfsGetWorkingDirectory(fs, buffer, sizeof(buffer))) ? buffer : "Failed!"));
        totalResult += (resp ? 0 : 1);

        fprintf(stderr, "hdfsGetDefaultBlockSize: %ld\n", hdfsGetDefaultBlockSize(fs));
        fprintf(stderr, "hdfsGetCapacity: %ld\n", hdfsGetCapacity(fs));
        fprintf(stderr, "hdfsGetUsed: %ld\n", hdfsGetUsed(fs));

        hdfsFileInfo *fileInfo = NULL;
        if((fileInfo = hdfsGetPathInfo(fs, slashTmp)) != NULL) {
            fprintf(stderr, "hdfsGetPathInfo - SUCCESS!\n");
            fprintf(stderr, "Name: %s, ", fileInfo->mName);
            fprintf(stderr, "Type: %c, ", (char)(fileInfo->mKind));
            fprintf(stderr, "Replication: %d, ", fileInfo->mReplication);
            fprintf(stderr, "BlockSize: %ld, ", fileInfo->mBlockSize);
            fprintf(stderr, "Size: %ld, ", fileInfo->mSize);
            fprintf(stderr, "LastMod: %s", ctime(&fileInfo->mLastMod)); 
            fprintf(stderr, "Owner: %s, ", fileInfo->mOwner);
            fprintf(stderr, "Group: %s, ", fileInfo->mGroup);
            char permissions[10];
            permission_disp(fileInfo->mPermissions, permissions);
            fprintf(stderr, "Permissions: %d (%s)\n", fileInfo->mPermissions, permissions);
            hdfsFreeFileInfo(fileInfo, 1);
        } else {
            totalResult++;
            fprintf(stderr, "waah! hdfsGetPathInfo for %s - FAILED!\n", slashTmp);
        }

        hdfsFileInfo *fileList = 0;
        int numEntries = 0;
        if((fileList = hdfsListDirectory(fs, slashTmp, &numEntries)) != NULL) {
            int i = 0;
            for(i=0; i < numEntries; ++i) {
                fprintf(stderr, "Name: %s, ", fileList[i].mName);
                fprintf(stderr, "Type: %c, ", (char)fileList[i].mKind);
                fprintf(stderr, "Replication: %d, ", fileList[i].mReplication);
                fprintf(stderr, "BlockSize: %ld, ", fileList[i].mBlockSize);
                fprintf(stderr, "Size: %ld, ", fileList[i].mSize);
                fprintf(stderr, "LastMod: %s", ctime(&fileList[i].mLastMod));
                fprintf(stderr, "Owner: %s, ", fileList[i].mOwner);
                fprintf(stderr, "Group: %s, ", fileList[i].mGroup);
                char permissions[10];
                permission_disp(fileList[i].mPermissions, permissions);
                fprintf(stderr, "Permissions: %d (%s)\n", fileList[i].mPermissions, permissions);
            }
            hdfsFreeFileInfo(fileList, numEntries);
        } else {
            if (errno) {
                totalResult++;
                fprintf(stderr, "waah! hdfsListDirectory - FAILED!\n");
            } else {
                fprintf(stderr, "Empty directory!\n");
            }
        }

        char*** hosts = hdfsGetHosts(fs, srcPath, 0, 1);
        if(hosts) {
            fprintf(stderr, "hdfsGetHosts - SUCCESS! ... \n");
            int i=0; 
            while(hosts[i]) {
                int j = 0;
                while(hosts[i][j]) {
                    fprintf(stderr, 
                            "\thosts[%d][%d] - %s\n", i, j, hosts[i][j]);
                    ++j;
                }
                ++i;
            }
        } else {
            totalResult++;
            fprintf(stderr, "waah! hdfsGetHosts - FAILED!\n");
        }
       
        char *newOwner = "root";
        // setting tmp dir to 777 so later when connectAsUser nobody, we can write to it
        short newPerm = 0666;

        // chown write
        fprintf(stderr, "hdfsChown: %s\n", ((result = hdfsChown(fs, writePath, NULL, "users")) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsChown: %s\n", ((result = hdfsChown(fs, writePath, newOwner, NULL)) ? "Failed!" : "Success!"));
        totalResult += result;
        // chmod write
        fprintf(stderr, "hdfsChmod: %s\n", ((result = hdfsChmod(fs, writePath, newPerm)) ? "Failed!" : "Success!"));
        totalResult += result;



        sleep(2);
        tTime newMtime = time(NULL);
        tTime newAtime = time(NULL);

        // utime write
        fprintf(stderr, "hdfsUtime: %s\n", ((result = hdfsUtime(fs, writePath, newMtime, newAtime)) ? "Failed!" : "Success!"));

        totalResult += result;

        // chown/chmod/utime read
        hdfsFileInfo *finfo = hdfsGetPathInfo(fs, writePath);

        fprintf(stderr, "hdfsChown read: %s\n", ((result = (strcmp(finfo->mOwner, newOwner) != 0)) ? "Failed!" : "Success!"));
        totalResult += result;

        fprintf(stderr, "hdfsChmod read: %s\n", ((result = (finfo->mPermissions != newPerm)) ? "Failed!" : "Success!"));
        totalResult += result;

        // will later use /tmp/ as a different user so enable it
        fprintf(stderr, "hdfsChmod: %s\n", ((result = hdfsChmod(fs, "/tmp/", 0777)) ? "Failed!" : "Success!"));
        totalResult += result;

        fprintf(stderr,"newMTime=%ld\n",newMtime);
        fprintf(stderr,"curMTime=%ld\n",finfo->mLastMod);


        fprintf(stderr, "hdfsUtime read (mtime): %s\n", ((result = (finfo->mLastMod != newMtime)) ? "Failed!" : "Success!"));
        totalResult += result;

        // No easy way to turn on access times from hdfs_test right now
        //        fprintf(stderr, "hdfsUtime read (atime): %s\n", ((result = (finfo->mLastAccess != newAtime)) ? "Failed!" : "Success!"));
        //        totalResult += result;

        hdfsFreeFileInfo(finfo, 1);

        // Clean up
        fprintf(stderr, "hdfsDelete: %s\n", ((result = hdfsDelete(fs, newDirectory, 1)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsDelete: %s\n", ((result = hdfsDelete(fs, srcPath, 1)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsDelete: %s\n", ((result = hdfsDelete(lfs, srcPath, 1)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsDelete: %s\n", ((result = hdfsDelete(lfs, dstPath, 1)) ? "Failed!" : "Success!"));
        totalResult += result;
        fprintf(stderr, "hdfsExists: %s\n", ((result = hdfsExists(fs, newDirectory)) ? "Success!" : "Failed!"));
        totalResult += (result ? 0 : 1);
    }

    {
      // TEST APPENDS
      const char *writePath = "/tmp/appends";

      // CREATE
      hdfsFile writeFile = hdfsOpenFile(fs, writePath, O_WRONLY, 0, 0, 0);
      if(!writeFile) {
        fprintf(stderr, "Failed to open %s for writing!\n", writePath);
        exit(-1);
      }
      fprintf(stderr, "Opened %s for writing successfully...\n", writePath);

      char* buffer = "Hello,";
      tSize num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer, strlen(buffer));
      fprintf(stderr, "Wrote %d bytes\n", num_written_bytes);

      if (hdfsFlush(fs, writeFile)) {
        fprintf(stderr, "Failed to 'flush' %s\n", writePath); 
        exit(-1);
        }
      fprintf(stderr, "Flushed %s successfully!\n", writePath); 

      hdfsCloseFile(fs, writeFile);

      // RE-OPEN
      writeFile = hdfsOpenFile(fs, writePath, O_WRONLY|O_APPEND, 0, 0, 0);
      if(!writeFile) {
        fprintf(stderr, "Failed to open %s for writing!\n", writePath);
        exit(-1);
      }
      fprintf(stderr, "Opened %s for writing successfully...\n", writePath);

      buffer = " World";
      num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer, strlen(buffer) + 1);
      fprintf(stderr, "Wrote %d bytes\n", num_written_bytes);

      if (hdfsFlush(fs, writeFile)) {
        fprintf(stderr, "Failed to 'flush' %s\n", writePath); 
        exit(-1);
      }
      fprintf(stderr, "Flushed %s successfully!\n", writePath); 

      hdfsCloseFile(fs, writeFile);

      // CHECK size
      hdfsFileInfo *finfo = hdfsGetPathInfo(fs, writePath);
      fprintf(stderr, "fileinfo->mSize: == total %s\n", ((result = (finfo->mSize == strlen("Hello, World") + 1)) ? "Success!" : "Failed!"));
      totalResult += (result ? 0 : 1);

      // READ and check data
      hdfsFile readFile = hdfsOpenFile(fs, writePath, O_RDONLY, 0, 0, 0);
      if (!readFile) {
        fprintf(stderr, "Failed to open %s for reading!\n", writePath);
        exit(-1);
      }

      char rdbuffer[32];
      tSize num_read_bytes = hdfsRead(fs, readFile, (void*)rdbuffer, sizeof(rdbuffer));
      fprintf(stderr, "Read following %d bytes:\n%s\n", 
              num_read_bytes, rdbuffer);

      fprintf(stderr, "read == Hello, World %s\n", (result = (strcmp(rdbuffer, "Hello, World") == 0)) ? "Success!" : "Failed!");

      hdfsCloseFile(fs, readFile);

      // DONE test appends
    }
      
      
    totalResult += (hdfsDisconnect(fs) != 0);

    {
      //
      // Now test as connecting as a specific user
      // This is only meant to test that we connected as that user, not to test
      // the actual fs user capabilities. Thus just create a file and read
      // the owner is correct.

      const char *tuser = "nobody";
      const char* writePath = "/tmp/usertestfile.txt";

      fs = hdfsConnectAsUserNewInstance("default", 0, tuser);
      if(!fs) {
        fprintf(stderr, "Oops! Failed to connect to hdfs as user %s!\n",tuser);
        exit(-1);
      } 

        hdfsFile writeFile = hdfsOpenFile(fs, writePath, O_WRONLY|O_CREAT, 0, 0, 0);
        if(!writeFile) {
            fprintf(stderr, "Failed to open %s for writing!\n", writePath);
            exit(-1);
        }
        fprintf(stderr, "Opened %s for writing successfully...\n", writePath);

        char* buffer = "Hello, World!";
        tSize num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer, strlen(buffer)+1);
        fprintf(stderr, "Wrote %d bytes\n", num_written_bytes);

        if (hdfsFlush(fs, writeFile)) {
            fprintf(stderr, "Failed to 'flush' %s\n", writePath); 
            exit(-1);
        }
        fprintf(stderr, "Flushed %s successfully!\n", writePath); 

        hdfsCloseFile(fs, writeFile);

        hdfsFileInfo *finfo = hdfsGetPathInfo(fs, writePath);
        fprintf(stderr, "hdfs new file user is correct: %s\n", ((result = (strcmp(finfo->mOwner, tuser) != 0)) ? "Failed!" : "Success!"));
        totalResult += result;
    }
    
    totalResult += (hdfsDisconnect(fs) != 0);

    if (totalResult != 0) {
        return -1;
    } else {
        return 0;
    }
}

/**
 * vim: ts=4: sw=4: et:
 */

