package hsfulda.de;
import java.util.Scanner;

public class FedTestEnvironment {

	private FedConnection fedConnection;

	public FedTestEnvironment(FedConnection fedConnection) {
		this.fedConnection = fedConnection;

		try {
			this.fedConnection.setAutoCommit(false);
		} catch (FedException fedException) {
			System.err.println(fedException.getMessage());
			System.out.flush();
			System.err.flush();
		}
	}

	public void run(String filename) {
		run(filename, false);
	}

	public void run(String filename, boolean debug) {
		System.out.println("**************************************************************************");
		System.out.println("Executing script file '" + filename + "'...");
		long start, end, delta, op = 0;

		start = System.currentTimeMillis();


			Scanner scanner = new Scanner(getClass().getClassLoader().getResourceAsStream(filename)).useDelimiter(";");
			while (scanner.hasNext()) {

				String statement = scanner.next().trim();

				while (statement.startsWith("/*") || statement.startsWith("--")) {
					if (statement.startsWith("/*")) {
						String comment = statement.substring(0, statement.indexOf("*/") + 2);
						if (debug) {
							System.out.println("--> " + comment + " <--");
						}
						statement = statement.substring(statement.indexOf("*/") + 2).trim();
					} else {
						String comment = statement.substring(0, statement.indexOf("\n") - 1);
						if (debug) {
							System.out.println("--> " + comment + " <--");
						}
						statement = statement.substring(statement.indexOf("\n") + 1).trim();
					}
				}

				if (!"".equals(statement)) {
					if (!"SET ECHO ON".equals(statement.toUpperCase()) && !statement.toUpperCase().startsWith("ALTER SESSION")) {
						if (debug) {
							System.out.println("Executing \"" + statement + "\"...\n");
							System.out.flush();
						}
						if (statement.toUpperCase().equals("COMMIT")) {
							try {
								fedConnection.commit();
								if (debug) {
									System.out.println("Transaction commit");
								}
							} catch (FedException fedException) {
								System.out.println(fedException.getMessage());
								System.out.flush();
							}
						} else {
							if (statement.toUpperCase().equals("ROLLBACK")) {
								try {
									fedConnection.rollback();
									if (debug) {
										System.out.println("Transaction rollback");
									}
								} catch (FedException fedException) {
									System.out.println(fedException.getMessage());
									System.out.flush();
								}
							} else {
								if (statement.toUpperCase().startsWith("SELECT")) {
									// SELECT
									try {
										FedStatement fedStatement = fedConnection.getStatement();
										FedResultSet fedResultSet = fedStatement.executeQuery(statement);

										op++;

										if (debug) {
											for (int i = 1; i <= fedResultSet.getColumnCount(); i++) {
												System.out.printf("%-15s", fedResultSet.getColumnName(i));
											}
											System.out.println();

											for (int i = 1; i <= fedResultSet.getColumnCount(); i++) {
												System.out.print("-------------- ");
											}
											System.out.println();
											while (fedResultSet.next()) {
												for (int i = 1; i <= fedResultSet.getColumnCount(); i++) {
													System.out.printf("%-15s", fedResultSet.getString(i));
												}
												System.out.println();
											}
											System.out.println();
										}
										fedStatement.close();
									} catch (FedException fedException) {
										System.out.println(fedException.getMessage());
										System.out.flush();
									}
								} else {
									// UPDATE, INSERT, DELETE
									try {
										FedStatement fedStatement = fedConnection.getStatement();
										int count = fedStatement.executeUpdate(statement);

										op++;

										if (statement.toUpperCase().startsWith("UPDATE")) {
											if (debug) {
												System.out.println(count + " rows updated\n");
											}
										} else {
											if (statement.toUpperCase().startsWith("INSERT")) {
												if (debug) {
													System.out.println(count + " rows inserted\n");
												}
											} else {
												if (statement.toUpperCase().startsWith("DELETE")) {
													if (debug) {
														System.out.println(count + " rows deleted\n");
													}
												} else {
													if (debug) {
														System.out.println(count + " OK");
													}
												}
											}
										}

										fedStatement.close();
									} catch (FedException fedException) {
										System.out.println(fedException.getMessage());
										System.out.flush();
									}
								}
							}
						}
					}
				}
			}
		end = System.currentTimeMillis();

		delta = end - start;
		System.out.println("File '" + filename + "', " + op + " operations, " + delta + " milliseconds");
		System.out.println("**************************************************************************\n");
	}
}