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package io.dico.dicore.command;
import io.dico.dicore.command.IContextFilter.Priority;
import io.dico.dicore.command.parameter.ArgumentBuffer;
import io.dico.dicore.command.parameter.IArgumentPreProcessor;
import io.dico.dicore.command.parameter.Parameter;
import io.dico.dicore.command.parameter.ParameterList;
import io.dico.dicore.command.parameter.type.ParameterType;
import org.bukkit.Location;
import org.bukkit.command.CommandSender;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
public abstract class Command {
private static final String[] EMPTY_DESCRIPTION = new String[0];
private final ParameterList parameterList = new ParameterList();
private final List<IContextFilter> contextFilters = new ArrayList<>(3);
private String[] description = EMPTY_DESCRIPTION;
private String shortDescription;
public Command addParameter(Parameter<?, ?> parameter) {
parameterList.addParameter(parameter);
return this;
}
public <TType> Command addParameter(String name, String description, ParameterType<TType, Void> type) {
return addParameter(new Parameter<>(name, description, type, null, false, null));
}
public <TType, TParamInfo> Command addParameter(String name, String description, ParameterType<TType, TParamInfo> type, TParamInfo paramInfo) {
return addParameter(new Parameter<>(name, description, type, paramInfo, false, null));
}
public <TType> Command addFlag(String name, String description, ParameterType<TType, Void> type) {
return addParameter(new Parameter<>('-' + name, description, type, null, true, null));
}
public <TType, TParamInfo> Command addFlag(String name, String description, ParameterType<TType, TParamInfo> type, TParamInfo paramInfo) {
return addParameter(new Parameter<>('-' + name, description, type, paramInfo, true, null));
}
public <TType> Command addAuthorizedFlag(String name, String description, ParameterType<TType, Void> type, String permission) {
return addParameter(new Parameter<>('-' + name, description, type, null, true, permission));
}
public <TType, TParamInfo> Command addAuthorizedFlag(String name, String description, ParameterType<TType, TParamInfo> type, TParamInfo paramInfo, String permission) {
return addParameter(new Parameter<>('-' + name, description, type, paramInfo, true, permission));
}
public Command requiredParameters(int requiredParameters) {
parameterList.setRequiredCount(requiredParameters);
return this;
}
public Command repeatFinalParameter() {
parameterList.setRepeatFinalParameter(true);
return this;
}
public Command setDescription(String... description) {
this.description = Objects.requireNonNull(description);
return this;
}
public Command setShortDescription(String shortDescription) {
this.shortDescription = shortDescription;
return this;
}
public Command preprocessArguments(IArgumentPreProcessor processor) {
parameterList.setArgumentPreProcessor(processor);
return this;
}
public final ParameterList getParameterList() {
return parameterList;
}
public final String[] getDescription() {
return description.length == 0 ? description : description.clone();
}
public String getShortDescription() {
return shortDescription;
}
/**
* ---- CONTEXT FILTERS ----
* Filter the contexts. For example, if the sender must be a player but it's the console,
* throw a CommandException describing the problem.
*/
private transient int postParameterFilterCount = 0;
public Command addContextFilter(IContextFilter contextFilter) {
Objects.requireNonNull(contextFilter);
if (!contextFilters.contains(contextFilter)) {
contextFilters.add(contextFilter);
contextFilters.sort(null);
if (contextFilter.getPriority().compareTo(Priority.POST_PARAMETERS) >= 0) {
postParameterFilterCount++;
}
}
return this;
}
public List<IContextFilter> getContextFilters() {
return Collections.unmodifiableList(contextFilters);
}
public Command removeContextFilter(IContextFilter contextFilter) {
boolean ret = contextFilters.remove(contextFilter);
if (ret) {
if (contextFilter.getPriority().compareTo(Priority.POST_PARAMETERS) >= 0) {
postParameterFilterCount--;
}
}
return this;
}
// ---- CONTROL FLOW IN COMMAND TREES ----
public boolean isVisibleTo(CommandSender sender) {
return true;
}
public boolean takePrecedenceOverSubcommand(String subCommand, ArgumentBuffer buffer) {
return false;
}
// ---- EXECUTION ----
public void execute(CommandSender sender, ICommandAddress caller, ArgumentBuffer buffer) {
ExecutionContext executionContext = new ExecutionContext(sender, caller, this, buffer, false);
try {
executeWithContext(executionContext);
} catch (Throwable t) {
caller.getChatController().handleException(sender, executionContext, t);
}
}
public void executeWithContext(ExecutionContext context) throws CommandException {
//System.out.println("In Command.execute(sender, caller, buffer)#try{");
int i, n;
for (i = 0, n = contextFilters.size() - postParameterFilterCount; i < n; i++) {
contextFilters.get(i).filterContext(context);
}
context.parseParameters();
for (n = contextFilters.size(); i < n; i++) {
contextFilters.get(i).filterContext(context);
}
//System.out.println("Post-contextfilters");
String message = execute(context.getSender(), context);
context.getAddress().getChatController().sendMessage(context.getSender(), EMessageType.RESULT, message);
}
public abstract String execute(CommandSender sender, ExecutionContext context) throws CommandException;
public List<String> tabComplete(CommandSender sender, ICommandAddress caller, Location location, ArgumentBuffer buffer) {
ExecutionContext executionContext = new ExecutionContext(sender, caller, this, buffer, true);
try {
return tabCompleteWithContext(executionContext, location);
} catch (CommandException ex) {
return Collections.emptyList();
}
}
public List<String> tabCompleteWithContext(ExecutionContext context, Location location) throws CommandException {
int i, n;
for (i = 0, n = contextFilters.size() - postParameterFilterCount; i < n; i++) {
contextFilters.get(i).filterContext(context);
}
context.parseParametersQuietly();
return tabComplete(context.getSender(), context, location);
}
public List<String> tabComplete(CommandSender sender, ExecutionContext context, Location location) {
return context.getSuggestedCompletions(location);
}
}
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