package com.avaje.ebeaninternal.server.deploy;

import java.io.IOException;
import java.sql.SQLException;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.avaje.ebean.bean.EntityBean;
import com.avaje.ebean.config.ScalarTypeConverter;
import com.avaje.ebean.text.json.EJson;
import com.avaje.ebeaninternal.server.deploy.meta.DeployBeanPropertyCompound;
import com.avaje.ebeaninternal.server.el.ElPropertyChainBuilder;
import com.avaje.ebeaninternal.server.el.ElPropertyValue;
import com.avaje.ebeaninternal.server.query.SqlBeanLoad;
import com.avaje.ebeaninternal.server.text.json.WriteJson;
import com.avaje.ebeaninternal.server.type.CtCompoundProperty;
import com.avaje.ebeaninternal.server.type.CtCompoundPropertyElAdapter;
import com.avaje.ebeaninternal.server.type.CtCompoundType;
import com.fasterxml.jackson.core.JsonParser;

/**
 * Property mapped to an Immutable Compound Value Object.
 * <p>
 * An Immutable Compound Value Object is similar to an Embedded bean but it
 * doesn't require enhancement and MUST be treated as an Immutable type.
 * </p>
 */
public class BeanPropertyCompound extends BeanProperty {

    private final CtCompoundType<?> compoundType;

    /**
     * Type Converter for scala.Option and similar type wrapping.
     */
    @SuppressWarnings("rawtypes")
    private final ScalarTypeConverter typeConverter;
    
    private final BeanProperty[] scalarProperties;

    private final LinkedHashMap<String, BeanProperty> propertyMap = new LinkedHashMap<String, BeanProperty>();

    private final LinkedHashMap<String, CtCompoundPropertyElAdapter> nonScalarMap = new LinkedHashMap<String, CtCompoundPropertyElAdapter>();

    private final BeanPropertyCompoundRoot root;
    
    /**
     * Create the property.
     */
    public BeanPropertyCompound(BeanDescriptorMap owner, BeanDescriptor<?> descriptor, DeployBeanPropertyCompound deploy) {

        super(owner, descriptor, deploy);

        this.compoundType = deploy.getCompoundType();
        this.typeConverter = deploy.getTypeConverter();
        
        this.root = deploy.getFlatProperties(owner, descriptor);

        this.scalarProperties = root.getScalarProperties();

        for (int i = 0; i < scalarProperties.length; i++) {
            propertyMap.put(scalarProperties[i].getName(), scalarProperties[i]);
        }

        List<CtCompoundProperty> nonScalarPropsList = root.getNonScalarProperties();

        for (int i = 0; i < nonScalarPropsList.size(); i++) {
            CtCompoundProperty ctProp = nonScalarPropsList.get(i);
            CtCompoundPropertyElAdapter adapter = new CtCompoundPropertyElAdapter(ctProp);
            nonScalarMap.put(ctProp.getRelativeName(), adapter);
        }

    }

    @Override
    public void initialise() {
        // do nothing for normal BeanProperty
        if (!isTransient && compoundType == null) {
            String msg = "No cvoInternalType assigned to " + descriptor.getFullName() + "." + getName();
            throw new RuntimeException(msg);
        }
    }

    @Override
    public void setDeployOrder(int deployOrder) {
        this.deployOrder = deployOrder;
        for (CtCompoundPropertyElAdapter adapter : nonScalarMap.values()) {
            adapter.setDeployOrder(deployOrder);
        }
    }

    /**
     * Get the underlying compound type.
     */
    @SuppressWarnings("unchecked")
    public Object getValueUnderlying(EntityBean bean) {

        Object value =  getValue(bean);
        if (typeConverter != null){
            value = typeConverter.unwrapValue(value);
        }
        return value;
    }
 
    public ElPropertyValue buildElPropertyValue(String propName, String remainder, ElPropertyChainBuilder chain, boolean propertyDeploy) {

        if (chain == null) {
            chain = new ElPropertyChainBuilder(true, propName);
        }

        // first add this property
        chain.add(this);

        // handle all the rest of the chain handled by the
        // BeanProperty (all depth for nested compound type)
        BeanProperty p = propertyMap.get(remainder);
        if (p != null) {
            return chain.add(p).build();
        }
        CtCompoundPropertyElAdapter elAdapter = nonScalarMap.get(remainder);
        if (elAdapter == null) {
            throw new RuntimeException("property [" + remainder + "] not found in " + getFullBeanName());
        }
        return chain.add(elAdapter).build();
    }

    @Override
    public void appendSelect(DbSqlContext ctx, boolean subQuery) {
        if (!isTransient) {
            for (int i = 0; i < scalarProperties.length; i++) {
                scalarProperties[i].appendSelect(ctx, subQuery);
            }
        }
    }

    public BeanProperty[] getScalarProperties() {
        return scalarProperties;
    }

    @Override
    public Object readSet(DbReadContext ctx, EntityBean bean, Class<?> type) throws SQLException {

        boolean assignable = (type == null || owningType.isAssignableFrom(type));

        Object v = compoundType.read(ctx.getDataReader());
        if (assignable) {
            setValue(bean, v);
        }

        return v;
    }

    /**
     * Read the data from the resultSet effectively ignoring it and returning
     * null.
     */
    @SuppressWarnings("unchecked")
    @Override
    public Object read(DbReadContext ctx) throws SQLException {

        Object v = compoundType.read(ctx.getDataReader());
        if (typeConverter != null){
            v = typeConverter.wrapValue(v);
        }
        return v;
    }

    @Override
    public void loadIgnore(DbReadContext ctx) {
        compoundType.loadIgnore(ctx.getDataReader());
    }

    @Override
    public void load(SqlBeanLoad sqlBeanLoad) throws SQLException {
        sqlBeanLoad.load(this);
    }

    @Override
    public Object elGetReference(EntityBean bean) {
        return bean;
    }

    public void jsonWrite(WriteJson ctx, EntityBean bean) throws IOException {
      if (!jsonSerialize) {
        return;
      }
      Object value = getValueIntercept(bean);
      if (value == null) {
        ctx.writeNull(name);
      } else {
        compoundType.jsonWrite(ctx, value, name);
      }        
    }
    
    public void jsonRead(JsonParser ctx, EntityBean bean) throws IOException {
      
      if (!jsonDeserialize) {
        return;
      }
      
      Object value = EJson.parse(ctx);
      if (value == null) {
        setValue(bean, null);
      } else {
        @SuppressWarnings("unchecked")
        Map<String,Object> map = (Map<String,Object>)value;
        Object objValue = compoundType.jsonConvert(map);
        setValue(bean, objValue);
      }
    }
}