// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.runtime;

import static com.google.common.base.Strings.isNullOrEmpty;

import com.google.devtools.build.lib.profiler.MemoryProfiler.MemoryProfileStableHeapParameters;
import com.google.devtools.build.lib.runtime.CommandLineEvent.ToolCommandLineEvent;
import com.google.devtools.build.lib.util.OptionsUtils;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.common.options.Converter;
import com.google.devtools.common.options.Converters;
import com.google.devtools.common.options.Option;
import com.google.devtools.common.options.OptionDocumentationCategory;
import com.google.devtools.common.options.OptionEffectTag;
import com.google.devtools.common.options.OptionMetadataTag;
import com.google.devtools.common.options.OptionsBase;
import com.google.devtools.common.options.OptionsParsingException;
import java.util.List;
import java.util.UUID;
import java.util.logging.Level;

/**
 * Options common to all commands.
 */
public class CommonCommandOptions extends OptionsBase {

  // To create a new incompatible change, see the javadoc for AllIncompatibleChangesExpansion.
  @Option(
    name = "all_incompatible_changes",
    defaultValue = "null",
    documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
    effectTags = {OptionEffectTag.UNKNOWN},
    metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},
    expansionFunction = AllIncompatibleChangesExpansion.class,
    help =
        "Enables all options of the form --incompatible_*. Use this option to find places where "
            + "your build may break in the future due to deprecations or other changes."
  )
  public Void allIncompatibleChanges;

  @Option(
    name = "config",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
    effectTags = {OptionEffectTag.UNKNOWN},
    allowMultiple = true,
    help =
        "Selects additional config sections from the rc files; for every <command>, it "
            + "also pulls in the options from <command>:<config> if such a section exists; "
            + "if the section does not exist, this flag is ignored. "
            + "Note that it is currently only possible to provide these options on the "
            + "command line, not in the rc files. The config sections and flag combinations "
            + "they are equivalent to are located in the tools/*.blazerc config files."
  )
  public List<String> configs;

  @Option(
    name = "logging",
    defaultValue = "3", // Level.INFO
    documentationCategory = OptionDocumentationCategory.LOGGING,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS},
    converter = Converters.LogLevelConverter.class,
    help = "The logging level."
  )
  public Level verbosity;

  @Option(
    name = "client_cwd",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    metadataTags = {OptionMetadataTag.HIDDEN},
    effectTags = {OptionEffectTag.CHANGES_INPUTS},
    converter = OptionsUtils.PathFragmentConverter.class,
    help = "A system-generated parameter which specifies the client's working directory"
  )
  public PathFragment clientCwd;

  @Option(
    name = "announce_rc",
    defaultValue = "false",
    documentationCategory = OptionDocumentationCategory.LOGGING,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS},
    help = "Whether to announce rc options."
  )
  public boolean announceRcOptions;

  @Option(
    name = "always_profile_slow_operations",
    defaultValue = "true",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_INTERNAL_CONFIGURATION},
    help = "Whether profiling slow operations is always turned on"
  )
  public boolean alwaysProfileSlowOperations;

  @Option(
    name = "allow_undefined_configs",
    defaultValue = "false",
    documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
    effectTags = {OptionEffectTag.EAGERNESS_TO_EXIT},
    help = "Do not throw an error when the config is not defined."
  )
  public boolean allowUndefinedConfigs;

  /** Converter for UUID. Accepts values as specified by {@link UUID#fromString(String)}. */
  public static class UUIDConverter implements Converter<UUID> {

    @Override
    public UUID convert(String input) throws OptionsParsingException {
      if (isNullOrEmpty(input)) {
        return null;
      }
      try {
        return UUID.fromString(input);
      } catch (IllegalArgumentException e) {
        throw new OptionsParsingException(
            String.format("Value '%s' is not a value UUID.", input), e);
      }
    }

    @Override
    public String getTypeDescription() {
      return "a UUID";
    }
  }

  /**
   * Converter for options (--build_request_id) that accept prefixed UUIDs. Since we do not care
   * about the structure of this value after validation, we store it as a string.
   */
  public static class PrefixedUUIDConverter implements Converter<String> {

    @Override
    public String convert(String input) throws OptionsParsingException {
      if (isNullOrEmpty(input)) {
        return null;
      }
      // UUIDs that are accepted by UUID#fromString have 36 characters. Interpret the last 36
      // characters as an UUID and the rest as a prefix. We do not check anything about the contents
      // of the prefix.
      try {
        int uuidStartIndex = input.length() - 36;
        UUID.fromString(input.substring(uuidStartIndex));
      } catch (IllegalArgumentException | IndexOutOfBoundsException e) {
        throw new OptionsParsingException(
            String.format("Value '%s' does end in a valid UUID.", input), e);
      }
      return input;
    }

    @Override
    public String getTypeDescription() {
      return "An optionally prefixed UUID. The last 36 characters will be verified as a UUID.";
    }
  }

  // Command ID and build request ID can be set either by flag or environment variable. In most
  // cases, the internally generated ids should be sufficient, but we allow these to be set
  // externally if required. Option wins over environment variable, if both are set.
  // TODO(b/67895628) Stop reading ids from the environment after the compatibility window has
  // passed.
  @Option(
    name = "invocation_id",
    defaultValue = "",
    converter = UUIDConverter.class,
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.BAZEL_MONITORING, OptionEffectTag.BAZEL_INTERNAL_CONFIGURATION},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "Unique identifier for the command being run."
  )
  public UUID invocationId;

  @Option(
    name = "build_request_id",
    defaultValue = "",
    converter = PrefixedUUIDConverter.class,
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.BAZEL_MONITORING, OptionEffectTag.BAZEL_INTERNAL_CONFIGURATION},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "Unique identifier for the build being run."
  )
  public String buildRequestId;

  @Option(
    name = "profile",
    defaultValue = "null",
    documentationCategory = OptionDocumentationCategory.LOGGING,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    converter = OptionsUtils.PathFragmentConverter.class,
    help =
        "If set, profile Blaze and write data to the specified "
            + "file. Use blaze analyze-profile to analyze the profile."
  )
  public PathFragment profilePath;

  @Option(
    name = "record_full_profiler_data",
    defaultValue = "false",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    help =
        "By default, Blaze profiler will record only aggregated data for fast but numerous "
            + "events (such as statting the file). If this option is enabled, profiler will record "
            + "each event - resulting in more precise profiling data but LARGE performance "
            + "hit. Option only has effect if --profile used as well."
  )
  public boolean recordFullProfilerData;

  @Option(
    name = "memory_profile",
    defaultValue = "null",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    converter = OptionsUtils.PathFragmentConverter.class,
    help =
        "If set, write memory usage data to the specified file at phase ends and stable heap to"
            + " master log at end of build."
  )
  public PathFragment memoryProfilePath;

  @Option(
    name = "memory_profile_stable_heap_parameters",
    defaultValue = "1,0",
    documentationCategory = OptionDocumentationCategory.LOGGING,
    effectTags = {OptionEffectTag.BAZEL_MONITORING},
    converter = MemoryProfileStableHeapParameters.Converter.class,
    help =
        "Tune memory profile's computation of stable heap at end of build. Should be two integers "
            + "separated by a comma. First parameter is the number of GCs to perform. Second "
            + "parameter is the number of seconds to wait between GCs."
  )
  public MemoryProfileStableHeapParameters memoryProfileStableHeapParameters;

  @Option(
    name = "experimental_oom_more_eagerly_threshold",
    defaultValue = "100",
    documentationCategory = OptionDocumentationCategory.EXECUTION_STRATEGY,
    effectTags = {OptionEffectTag.HOST_MACHINE_RESOURCE_OPTIMIZATIONS},
    help =
        "If this flag is set to a value less than 100, Blaze will OOM if, after two full GC's, more"
            + "than this percentage of the (old gen) heap is still occupied."
  )
  public int oomMoreEagerlyThreshold;

  @Option(
    name = "startup_time",
    defaultValue = "0",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "The time in ms the launcher spends before sending the request to the blaze server."
  )
  public long startupTime;

  @Option(
    name = "extract_data_time",
    defaultValue = "0",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "The time in ms spent on extracting the new blaze version."
  )
  public long extractDataTime;

  @Option(
    name = "command_wait_time",
    defaultValue = "0",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "The time in ms a command had to wait on a busy Blaze server process."
  )
  public long waitTime;

  @Option(
    name = "tool_tag",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.LOGGING,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    help = "A tool name to attribute this Blaze invocation to."
  )
  public String toolTag;

  @Option(
    name = "restart_reason",
    defaultValue = "no_restart",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "The reason for the server restart."
  )
  public String restartReason;

  @Option(
    name = "binary_path",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS, OptionEffectTag.BAZEL_MONITORING},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help = "The absolute path of the blaze binary."
  )
  public String binaryPath;

  @Option(
    name = "experimental_allow_project_files",
    defaultValue = "false",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.CHANGES_INPUTS},
    metadataTags = {OptionMetadataTag.EXPERIMENTAL, OptionMetadataTag.HIDDEN},
    help = "Enable processing of +<file> parameters."
  )
  public boolean allowProjectFiles;

  @Option(
    name = "block_for_lock",
    defaultValue = "true",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.BAZEL_INTERNAL_CONFIGURATION},
    metadataTags = {OptionMetadataTag.HIDDEN},
    help =
        "If set (the default), a command will block if there is another one running. If "
            + "unset, these commands will immediately return with an error."
  )
  public boolean blockForLock;

  // We could accept multiple of these, in the event where there's a chain of tools that led to a
  // Bazel invocation. We would not want to expect anything from the order of these, and would need
  // to guarantee that the "label" for each command line is unique. Unless a need is demonstrated,
  // though, logs are a better place to track this information than flags, so let's try to avoid it.
  @Option(
    // In May 2018, this feature will have been out for 6 months. If the format we accept has not
    // changed in that time, we can remove the "experimental" prefix and tag.
    name = "experimental_tool_command_line",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.AFFECTS_OUTPUTS},
    // Keep this flag HIDDEN so that it is not listed with our reported command lines, it being
    // reported separately.
    metadataTags = {OptionMetadataTag.EXPERIMENTAL, OptionMetadataTag.HIDDEN},
    converter = ToolCommandLineEvent.Converter.class,
    help =
        "An extra command line to report with this invocation's command line. Useful for tools "
            + "that invoke Bazel and want the original information that the tool received to be "
            + "logged with the rest of the Bazel invocation."
  )
  public ToolCommandLineEvent toolCommandLine;

  @Option(
    name = "unconditional_warning",
    defaultValue = "",
    documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
    effectTags = {OptionEffectTag.TERMINAL_OUTPUT},
    allowMultiple = true,
    help =
        "A warning that will unconditionally get printed with build warnings and errors. This is "
            + "useful to deprecate bazelrc files or --config definitions. If the intent is to "
            + "effectively deprecate some flag or combination of flags, this is NOT sufficient. "
            + "The flag or flags should use the deprecationWarning field in the option definition, "
            + "or the bad combination should be checked for programmatically."
  )
  public List<String> deprecationWarnings;

}