// Copyright 2014 beego Author. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package validation

import (
	"fmt"
	"log"
	"reflect"
	"testing"
)

type user struct {
	ID    int
	Tag   string `valid:"Maxx(aa)"`
	Name  string `valid:"Required;"`
	Age   int    `valid:"Required; Range(1, 140)"`
	match string `valid:"Required; Match(/^(test)?\\w*@(/test/);com$/);Max(2)"`
}

func TestGetValidFuncs(t *testing.T) {
	u := user{Name: "test", Age: 1}
	tf := reflect.TypeOf(u)
	var vfs []ValidFunc
	var err error

	f, _ := tf.FieldByName("ID")
	if vfs, err = getValidFuncs(f); err != nil {
		t.Fatal(err)
	}
	if len(vfs) != 0 {
		t.Fatal("should get none ValidFunc")
	}

	f, _ = tf.FieldByName("Tag")
	if _, err = getValidFuncs(f); err.Error() != "doesn't exists Maxx valid function" {
		t.Fatal(err)
	}

	f, _ = tf.FieldByName("Name")
	if vfs, err = getValidFuncs(f); err != nil {
		t.Fatal(err)
	}
	if len(vfs) != 1 {
		t.Fatal("should get 1 ValidFunc")
	}
	if vfs[0].Name != "Required" && len(vfs[0].Params) != 0 {
		t.Error("Required funcs should be got")
	}

	f, _ = tf.FieldByName("Age")
	if vfs, err = getValidFuncs(f); err != nil {
		t.Fatal(err)
	}
	if len(vfs) != 2 {
		t.Fatal("should get 2 ValidFunc")
	}
	if vfs[0].Name != "Required" && len(vfs[0].Params) != 0 {
		t.Error("Required funcs should be got")
	}
	if vfs[1].Name != "Range" && len(vfs[1].Params) != 2 {
		t.Error("Range funcs should be got")
	}

	f, _ = tf.FieldByName("match")
	if vfs, err = getValidFuncs(f); err != nil {
		t.Fatal(err)
	}
	if len(vfs) != 3 {
		t.Fatal("should get 3 ValidFunc but now is", len(vfs))
	}
}

type User struct {
	Name string `valid:"Required;MaxSize(5)" `
	Sex  string `valid:"Required;" label:"sex_label"`
	Age  int    `valid:"Required;Range(1, 140);" label:"age_label"`
}

func TestValidation(t *testing.T) {
	u := User{"man1238888456", "", 1140}
	valid := Validation{}
	b, err := valid.Valid(&u)
	if err != nil {
		// handle error
	}
	if !b {
		// validation does not pass
		// blabla...
		for _, err := range valid.Errors {
			log.Println(err.Key, err.Message)
		}
		if len(valid.Errors) != 3 {
			t.Error("must be has 3 error")
		}
	} else {
		t.Error("must be has 3 error")
	}
}

func TestCall(t *testing.T) {
	u := user{Name: "test", Age: 180}
	tf := reflect.TypeOf(u)
	var vfs []ValidFunc
	var err error
	f, _ := tf.FieldByName("Age")
	if vfs, err = getValidFuncs(f); err != nil {
		t.Fatal(err)
	}
	valid := &Validation{}
	vfs[1].Params = append([]interface{}{valid, u.Age}, vfs[1].Params...)
	if _, err = funcs.Call(vfs[1].Name, vfs[1].Params...); err != nil {
		t.Fatal(err)
	}
	if len(valid.Errors) != 1 {
		t.Error("age out of range should be has an error")
	}
}

func ExampleAddCustomFunc() {
	err := AddCustomFunc("MyFunc", func(v *Validation, obj interface{}, key string) {
		// do validation, and if you find something wrong,
		// call AddError
		v.AddError(key, "this is my error")
	})
	if err != nil {
		panic(err)
	}
	type MyUser struct {
		Name string `valid:"MyFunc"`
	}
	v := Validation{}
	ok, err := v.Valid(&MyUser{})
	if err != nil {
		panic(err)
	}
	if !ok {
		// get the validation error here
		errs := v.Errors
		fmt.Println(errs[0].Error())
	}
	// Output:
	// Name this is my error
}
