// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.subscription;

import com.yahoo.config.ConfigBuilder;
import com.yahoo.config.ConfigurationRuntimeException;
import com.yahoo.config.FileReference;
import com.yahoo.foo.FunctionTestConfig;
import com.yahoo.foo.TestNodefsConfig;
import com.yahoo.vespa.config.ConfigPayload;
import com.yahoo.vespa.config.ConfigPayloadBuilder;
import org.junit.Test;

import java.io.File;
import java.util.Arrays;

import static org.junit.Assert.assertEquals;
import static com.yahoo.foo.FunctionTestConfig.*;
import static org.junit.Assert.assertTrue;

/**
 * @author Ulf Lilleengen
 */
public class ConfigInstanceUtilTest {

    @Test
    public void require_that_builder_values_can_be_overridden_by_another_builder() {
        FunctionTestConfig.Builder destination = createVariableAccessBuilder();

        FunctionTestConfig.Builder source = new FunctionTestConfig.Builder()
                .int_val(-1)
                .intarr(0)
                .doublearr(0.0)
                .basicStruct(b -> b.bar(-1).intArr(0))
                .myarray(b -> b
                        .intval(-1)
                        .refval("")
                        .fileVal("")
                        .myStruct(bb -> bb.a(0)
                        ));

        ConfigInstanceUtil.setValues(destination, source);

        FunctionTestConfig result = new FunctionTestConfig(destination);
        assertEquals(-1, result.int_val());
        assertEquals("foo", result.string_val());
        assertEquals(1, result.intarr().size());
        assertEquals(0, result.intarr(0));
        assertEquals(2, result.longarr().size());
        assertEquals(3, result.doublearr().size());
        assertEquals(2344.0, result.doublearr(0), 0.01);
        assertEquals(123.0, result.doublearr(1), 0.01);
        assertEquals(0.0, result.doublearr(2), 0.01);
        assertEquals(-1, result.basicStruct().bar());
        assertEquals("basicFoo", result.basicStruct().foo());
        assertEquals(3, result.basicStruct().intArr().size());
        assertEquals(310, result.basicStruct().intArr(0));
        assertEquals(311, result.basicStruct().intArr(1));
        assertEquals(0, result.basicStruct().intArr(2));
        assertEquals(3, result.myarray().size());
        assertEquals(-1, result.myarray(2).intval());
        assertTrue(result.myarray(2).refval().isEmpty());
        assertTrue(result.myarray(2).fileVal().value().isEmpty());
        assertEquals(0, result.myarray(2).myStruct().a());

    }

    @Test(expected = ConfigurationRuntimeException.class)
    public void require_that_invalid_builders_fail() {
        ConfigInstanceUtil.setValues(new FakeBuilder(), new FakeBuilder());
    }

    private static class FakeBuilder implements ConfigBuilder {
    }

    static FunctionTestConfig.Builder createVariableAccessBuilder() {
        return new FunctionTestConfig.Builder().
                bool_val(false).
                bool_with_def(true).
                int_val(5).
                int_with_def(-14).
                long_val(12345678901L).
                long_with_def(-9876543210L).
                double_val(41.23).
                double_with_def(-12).
                string_val("foo").
                stringwithdef("bar and foo").
                enum_val(Enum_val.FOOBAR).
                enumwithdef(Enumwithdef.BAR2).
                refval(":parent:").
                refwithdef(":parent:").
                fileVal("etc").
                pathVal(FileReference.mockFileReferenceForUnitTesting(new File("src/test/resources/configs/def-files/function-test.def"))).
                boolarr(false).
                longarr(9223372036854775807L).
                longarr(-9223372036854775808L).
                doublearr(2344.0).
                doublearr(123.0).
                stringarr("bar").
                enumarr(Enumarr.VALUES).
                refarr(Arrays.asList(":parent:", ":parent", "parent:")).  // test collection based setter
                fileArr("bin").

                basicStruct(b -> b.
                        foo("basicFoo").
                        bar(3).
                        intArr(310).intArr(311)).

                rootStruct(b -> b.
                        inner0(bb -> bb.index(11)).
                        inner1(bb -> bb.index(12)).
                        innerArr(bb -> bb.boolVal(true).stringVal("deep")).
                        innerArr(bb -> bb.boolVal(false).stringVal("blue a=\"escaped\""))).

                myarray(b -> b.
                        intval(-5).
                        stringval("baah").
                        stringval("yikes").
                        enumval(Myarray.Enumval.INNER).
                        refval(":parent:").
                        fileVal("file0").
                        anotherarray(bb -> bb.foo(7)).
                        myStruct(bb -> bb.a(1).b(2))).

                myarray(b -> b.
                        intval(5).
                        enumval(Myarray.Enumval.INNER).
                        refval(":parent:").
                        fileVal("file1").
                        anotherarray(bb -> bb.foo(1).foo(2)).
                        myStruct(bb -> bb.a(-1).b(-2)));

    }

    @Test
    public void test_require_private_getter() {
        FunctionTestConfig.Builder builder = createVariableAccessBuilder();
        assertEquals(ConfigInstanceUtil.getField(builder, "int_val"), 5);
        FunctionTestConfig conf = new FunctionTestConfig(builder);
        assertEquals(conf.int_val(), 5);
    }

    @Test
    public void testGetNewInstanceErrorMessage() {
        ConfigPayloadBuilder payloadBuilder = new ConfigPayloadBuilder();
        try {
            ConfigInstanceUtil.getNewInstance(TestNodefsConfig.class, "id0", ConfigPayload.fromBuilder(payloadBuilder));
            assert(false);
        } catch (IllegalArgumentException e) {
            assertEquals("Failed creating new instance of 'com.yahoo.foo.TestNodefsConfig' for config id 'id0'",
                         e.getMessage());
        }
    }
}