package org.simantics.scl.compiler.source.repository;

import gnu.trove.procedure.TObjectProcedure;

import org.simantics.scl.compiler.module.repository.UpdateListener;
import org.simantics.scl.compiler.source.ModuleSource;

public class CompositeModuleSourceRepository implements ModuleSourceRepository {
    public final ModuleSourceRepository[] children;

    public CompositeModuleSourceRepository(ModuleSourceRepository ... children) {
        this.children = children;
    }

    @Override
    public ModuleSource getModuleSource(String moduleName,
            UpdateListener listener) {
        ModuleSource result = null;
        for(ModuleSourceRepository sourceRepository : children) {
            ModuleSource source = sourceRepository.getModuleSource(moduleName, listener);
            if(source != null) {
                if(result != null) {
                    double resultPriority = result.getPriority();
                    double sourcePriority = source.getPriority();
                    if(resultPriority > sourcePriority)
                        continue;
                    if(resultPriority == sourcePriority)
                        throw new RuntimeException("Module " + moduleName + " has two sources " + result + ", " +
                                source + " with the same priority.");
                }
                result = source;
            }
        }
        return result;
    }
    
    @Override
    public String getDocumentation(String documentationName) {
        for(ModuleSourceRepository sourceRepository : children) {
            String documentation = sourceRepository.getDocumentation(documentationName);
            if(documentation != null)
                return documentation;
        }
        return null;
    }

    @Override
    public void forAllModules(TObjectProcedure<String> procedure) {
        for(ModuleSourceRepository sourceRepository : children)
            sourceRepository.forAllModules(procedure);
    }
    
    @Override
    public void forAllDocumentations(TObjectProcedure<String> procedure) {
        for(ModuleSourceRepository sourceRepository : children)
            sourceRepository.forAllDocumentations(procedure);
    }

    @Override
    public void checkUpdates() {
    }

    @Override
    public void clear() {
        for (ModuleSourceRepository child : children)
            child.clear();
    }
}