package com.fasterxml.jackson.databind.cfg;

import java.text.DateFormat;
import java.util.Locale;
import java.util.TimeZone;

import com.fasterxml.jackson.core.Base64Variant;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.databind.util.StdDateFormat;

Immutable container class used to store simple configuration
settings. Since instances are fully immutable, instances can
be freely shared and used without synchronization.
/**
 * Immutable container class used to store simple configuration
 * settings. Since instances are fully immutable, instances can
 * be freely shared and used without synchronization.
 */
public final class BaseSettings
    implements java.io.Serializable
{
    // for 2.6
    private static final long serialVersionUID = 1L;

    
We will use a default TimeZone as the baseline.
/**
     * We will use a default TimeZone as the baseline.
     */
    private static final TimeZone DEFAULT_TIMEZONE = 
            //  TimeZone.getDefault()
            /* [databind#915] 05-Nov-2015, tatu: Changed to UTC, from earlier
             * baseline of GMT (up to 2.6)
             */
            TimeZone.getTimeZone("UTC");
    
    /*
    /**********************************************************
    /* Configuration settings; introspection, related
    /**********************************************************
     */
    
    
Introspector used to figure out Bean properties needed for bean serialization
and deserialization. Overridable so that it is possible to change low-level
details of introspection, like adding new annotation types.
/**
     * Introspector used to figure out Bean properties needed for bean serialization
     * and deserialization. Overridable so that it is possible to change low-level
     * details of introspection, like adding new annotation types.
     */
    protected final ClassIntrospector _classIntrospector;

    
Introspector used for accessing annotation value based configuration.
/**
     * Introspector used for accessing annotation value based configuration.
     */
    protected final AnnotationIntrospector _annotationIntrospector;

    
Custom property naming strategy in use, if any.
/**
     * Custom property naming strategy in use, if any.
     */
    protected final PropertyNamingStrategy _propertyNamingStrategy;

    
Specific factory used for creating JavaType instances; needed to allow modules to add more custom type handling (mostly to support types of non-Java JVM languages) /**
     * Specific factory used for creating {@link JavaType} instances;
     * needed to allow modules to add more custom type handling
     * (mostly to support types of non-Java JVM languages)
     */
    protected final TypeFactory _typeFactory;

    /*
    /**********************************************************
    /* Configuration settings; type resolution
    /**********************************************************
     */

    
Type information handler used for "untyped" values (ones declared
to have type Object.class)
/**
     * Type information handler used for "untyped" values (ones declared
     * to have type <code>Object.class</code>)
     */
    protected final TypeResolverBuilder<?> _typeResolverBuilder;
    
    /*
    /**********************************************************
    /* Configuration settings; other
    /**********************************************************
     */
    
    
Custom date format to use for de-serialization. If specified, will be used instead of StdDateFormat. 

Note that the configured format object will be cloned once per
deserialization process (first time it is needed)
/**
     * Custom date format to use for de-serialization. If specified, will be
     * used instead of {@link com.fasterxml.jackson.databind.util.StdDateFormat}.
     *<p>
     * Note that the configured format object will be cloned once per
     * deserialization process (first time it is needed)
     */
    protected final DateFormat _dateFormat;

    
Object used for creating instances of handlers (serializers, deserializers,
type and type id resolvers), given class to instantiate. This is typically
used to do additional configuration (with dependency injection, for example)
beyond simply construction of instances; or to use alternative constructors.
/**
     * Object used for creating instances of handlers (serializers, deserializers,
     * type and type id resolvers), given class to instantiate. This is typically
     * used to do additional configuration (with dependency injection, for example)
     * beyond simply construction of instances; or to use alternative constructors.
     */
    protected final HandlerInstantiator _handlerInstantiator;

    
Default Locale used with serialization formats. Default value is Locale.getDefault(). /**
     * Default {@link java.util.Locale} used with serialization formats.
     * Default value is {@link Locale#getDefault()}.
     */
    protected final Locale _locale;

    
Default TimeZone used with serialization formats, if (and only if!) explicitly set by use; otherwise `null` to indicate "use default", which means "UTC" (from Jackson 2.7); earlier versions (up to 2.6) used "GMT". 
 Note that if a new value is set, timezone is also assigned to _dateFormat of this object. /**
     * Default {@link java.util.TimeZone} used with serialization formats,
     * if (and only if!) explicitly set by use; otherwise `null` to indicate
     * "use default", which means "UTC" (from Jackson 2.7); earlier versions
     * (up to 2.6) used "GMT".
     *<p>
     * Note that if a new value is set, timezone is also assigned to
     * {@link #_dateFormat} of this object.
     */
    protected final TimeZone _timeZone;

    
Explicitly default Base64Variant to use for handling binary data (byte[]), used with data formats
that use base64 encoding (like JSON, CSV).
Since:
2.1/**
     * Explicitly default {@link Base64Variant} to use for handling
     * binary data (<code>byte[]</code>), used with data formats
     * that use base64 encoding (like JSON, CSV).
     * 
     * @since 2.1
     */
    protected final Base64Variant _defaultBase64;
    
    /*
    /**********************************************************
    /* Construction
    /**********************************************************
     */

    public BaseSettings(ClassIntrospector ci, AnnotationIntrospector ai,
            PropertyNamingStrategy pns, TypeFactory tf,
            TypeResolverBuilder<?> typer, DateFormat dateFormat, HandlerInstantiator hi,
            Locale locale, TimeZone tz, Base64Variant defaultBase64)
    {
        _classIntrospector = ci;
        _annotationIntrospector = ai;
        _propertyNamingStrategy = pns;
        _typeFactory = tf;
        _typeResolverBuilder = typer;
        _dateFormat = dateFormat;
        _handlerInstantiator = hi;
        _locale = locale;
        _timeZone = tz;
        _defaultBase64 = defaultBase64;
    }

    /*
    /**********************************************************
    /* Factory methods
    /**********************************************************
     */
    
    public BaseSettings withClassIntrospector(ClassIntrospector ci) {
        if (_classIntrospector == ci) {
            return this;
        }
        return new BaseSettings(ci, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }
    
    public BaseSettings withAnnotationIntrospector(AnnotationIntrospector ai) {
        if (_annotationIntrospector == ai) {
            return this;
        }
        return new BaseSettings(_classIntrospector, ai, _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }

    public BaseSettings withInsertedAnnotationIntrospector(AnnotationIntrospector ai) {
        return withAnnotationIntrospector(AnnotationIntrospectorPair.create(ai, _annotationIntrospector));
    }

    public BaseSettings withAppendedAnnotationIntrospector(AnnotationIntrospector ai) {
        return withAnnotationIntrospector(AnnotationIntrospectorPair.create(_annotationIntrospector, ai));
    }

    /*
    public BaseSettings withVisibility(PropertyAccessor forMethod, JsonAutoDetect.Visibility visibility) {
        return new BaseSettings(_classIntrospector, _annotationIntrospector,
                _visibilityChecker.withVisibility(forMethod, visibility),
                _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }
    */
    
    public BaseSettings withPropertyNamingStrategy(PropertyNamingStrategy pns) {
        if (_propertyNamingStrategy == pns) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, pns, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }

    public BaseSettings withTypeFactory(TypeFactory tf) {
        if (_typeFactory == tf) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, tf,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }

    public BaseSettings withTypeResolverBuilder(TypeResolverBuilder<?> typer) {
        if (_typeResolverBuilder == typer) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
                typer, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }
    
    public BaseSettings withDateFormat(DateFormat df) {
        if (_dateFormat == df) {
            return this;
        }
        // 26-Sep-2015, tatu: Related to [databind#939], let's try to force TimeZone if
        //   (but only if!) it has been set explicitly.
        if ((df != null) && hasExplicitTimeZone()) {
            df = _force(df, _timeZone);
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, df, _handlerInstantiator, _locale,
                _timeZone, _defaultBase64);
    }

    public BaseSettings withHandlerInstantiator(HandlerInstantiator hi) {
        if (_handlerInstantiator == hi) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, hi, _locale,
                _timeZone, _defaultBase64);
    }

    public BaseSettings with(Locale l) {
        if (_locale == l) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, l,
                _timeZone, _defaultBase64);
    }

    
Fluent factory for constructing a new instance that uses specified TimeZone. Note that timezone used with also be assigned to configured DateFormat, changing time formatting defaults. /**
     * Fluent factory for constructing a new instance that uses specified TimeZone.
     * Note that timezone used with also be assigned to configured {@link DateFormat},
     * changing time formatting defaults.
     */
    public BaseSettings with(TimeZone tz)
    {
        if (tz == null) {
            throw new IllegalArgumentException();
        }
        if (tz == _timeZone) {
            return this;
        }
        
        DateFormat df = _force(_dateFormat, tz);
        return new BaseSettings(_classIntrospector, _annotationIntrospector,
                _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, df, _handlerInstantiator, _locale,
                tz, _defaultBase64);
    }

    
Since:
2.1/**
     * @since 2.1
     */
    public BaseSettings with(Base64Variant base64) {
        if (base64 == _defaultBase64) {
            return this;
        }
        return new BaseSettings(_classIntrospector, _annotationIntrospector,
                _propertyNamingStrategy, _typeFactory,
                _typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
                _timeZone, base64);
    }
    
    /*
    /**********************************************************
    /* API
    /**********************************************************
     */

    public ClassIntrospector getClassIntrospector() {
        return _classIntrospector;
    }
    
    public AnnotationIntrospector getAnnotationIntrospector() {
        return _annotationIntrospector;
    }

    public PropertyNamingStrategy getPropertyNamingStrategy() {
        return _propertyNamingStrategy;
    }

    public TypeFactory getTypeFactory() {
        return _typeFactory;
    }

    public TypeResolverBuilder<?> getTypeResolverBuilder() {
        return _typeResolverBuilder;
    }
    
    public DateFormat getDateFormat() {
        return _dateFormat;
    }

    public HandlerInstantiator getHandlerInstantiator() {
        return _handlerInstantiator;
    }

    public Locale getLocale() {
        return _locale;
    }

    public TimeZone getTimeZone() {
        TimeZone tz = _timeZone;
        return (tz == null) ? DEFAULT_TIMEZONE : tz;
    }

    
Accessor that may be called to determine whether this settings object
has been explicitly configured with a TimeZone (true), or is still
relying on the default settings (false).
Since:
2.7/**
     * Accessor that may be called to determine whether this settings object
     * has been explicitly configured with a TimeZone (true), or is still
     * relying on the default settings (false).
     *
     * @since 2.7
     */
    public boolean hasExplicitTimeZone() {
        return (_timeZone != null);
    }
    
    public Base64Variant getBase64Variant() {
        return _defaultBase64;
    }

    /*
    /**********************************************************
    /* Helper methods
    /**********************************************************
     */

    private DateFormat _force(DateFormat df, TimeZone tz)
    {
        if (df instanceof StdDateFormat) {
            return ((StdDateFormat) df).withTimeZone(tz);
        }
        // we don't know if original format might be shared; better create a clone:
        df = (DateFormat) df.clone();
        df.setTimeZone(tz);
        return df;
    }
}