/*
   Copyright 2014 CoreOS, Inc.

   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 validate

import (
	"reflect"
	"testing"
)

func TestChild(t *testing.T) {
	tests := []struct {
		parent node
		name   string

		child node
	}{
		{},
		{
			name: "c1",
		},
		{
			parent: node{
				children: []node{
					node{name: "c1"},
					node{name: "c2"},
					node{name: "c3"},
				},
			},
		},
		{
			parent: node{
				children: []node{
					node{name: "c1"},
					node{name: "c2"},
					node{name: "c3"},
				},
			},
			name:  "c2",
			child: node{name: "c2"},
		},
	}

	for _, tt := range tests {
		if child := tt.parent.Child(tt.name); !reflect.DeepEqual(tt.child, child) {
			t.Errorf("bad child (%q): want %#v, got %#v", tt.name, tt.child, child)
		}
	}
}

func TestHumanType(t *testing.T) {
	tests := []struct {
		node node

		humanType string
	}{
		{
			humanType: "invalid",
		},
		{
			node:      node{Value: reflect.ValueOf("hello")},
			humanType: "string",
		},
		{
			node: node{
				Value: reflect.ValueOf([]int{1, 2}),
				children: []node{
					node{Value: reflect.ValueOf(1)},
					node{Value: reflect.ValueOf(2)},
				}},
			humanType: "[]int",
		},
	}

	for _, tt := range tests {
		if humanType := tt.node.HumanType(); tt.humanType != humanType {
			t.Errorf("bad type (%q): want %q, got %q", tt.node, tt.humanType, humanType)
		}
	}
}

func TestToNode(t *testing.T) {
	tests := []struct {
		value   interface{}
		context context

		node node
	}{
		{},
		{
			value: struct{}{},
			node:  node{Value: reflect.ValueOf(struct{}{})},
		},
		{
			value: struct {
				A int `yaml:"a"`
			}{},
			node: node{
				children: []node{
					node{
						name: "a",
						field: reflect.TypeOf(struct {
							A int `yaml:"a"`
						}{}).Field(0),
					},
				},
			},
		},
		{
			value: struct {
				A []int `yaml:"a"`
			}{},
			node: node{
				children: []node{
					node{
						name: "a",
						field: reflect.TypeOf(struct {
							A []int `yaml:"a"`
						}{}).Field(0),
					},
				},
			},
		},
		{
			value: map[interface{}]interface{}{
				"a": map[interface{}]interface{}{
					"b": 2,
				},
			},
			context: NewContext([]byte("a:\n  b: 2")),
			node: node{
				children: []node{
					node{
						line: 1,
						name: "a",
						children: []node{
							node{name: "b", line: 2},
						},
					},
				},
			},
		},
		{
			value: struct {
				A struct {
					Jon bool `yaml:"b"`
				} `yaml:"a"`
			}{},
			node: node{
				children: []node{
					node{
						name: "a",
						children: []node{
							node{
								name: "b",
								field: reflect.TypeOf(struct {
									Jon bool `yaml:"b"`
								}{}).Field(0),
								Value: reflect.ValueOf(false),
							},
						},
						field: reflect.TypeOf(struct {
							A struct {
								Jon bool `yaml:"b"`
							} `yaml:"a"`
						}{}).Field(0),
						Value: reflect.ValueOf(struct {
							Jon bool `yaml:"b"`
						}{}),
					},
				},
				Value: reflect.ValueOf(struct {
					A struct {
						Jon bool `yaml:"b"`
					} `yaml:"a"`
				}{}),
			},
		},
	}

	for _, tt := range tests {
		var node node
		toNode(tt.value, tt.context, &node)
		if !nodesEqual(tt.node, node) {
			t.Errorf("bad node (%#v): want %#v, got %#v", tt.value, tt.node, node)
		}
	}
}

func TestFindKey(t *testing.T) {
	tests := []struct {
		key     string
		context context

		found bool
	}{
		{},
		{
			key:     "key1",
			context: NewContext([]byte("key1: hi")),
			found:   true,
		},
		{
			key:     "key2",
			context: NewContext([]byte("key1: hi")),
			found:   false,
		},
		{
			key:     "key3",
			context: NewContext([]byte("key1:\n  key2:\n    key3: hi")),
			found:   true,
		},
		{
			key:     "key4",
			context: NewContext([]byte("key1:\n  - key4: hi")),
			found:   true,
		},
		{
			key:     "key5",
			context: NewContext([]byte("#key5")),
			found:   false,
		},
	}

	for _, tt := range tests {
		if _, found := findKey(tt.key, tt.context); tt.found != found {
			t.Errorf("bad find (%q): want %t, got %t", tt.key, tt.found, found)
		}
	}
}

func TestFindElem(t *testing.T) {
	tests := []struct {
		context context

		found bool
	}{
		{},
		{
			context: NewContext([]byte("test: hi")),
			found:   false,
		},
		{
			context: NewContext([]byte("test:\n  - a\n  -b")),
			found:   true,
		},
		{
			context: NewContext([]byte("test:\n  -\n    a")),
			found:   true,
		},
	}

	for _, tt := range tests {
		if _, found := findElem(tt.context); tt.found != found {
			t.Errorf("bad find (%q): want %t, got %t", tt.context, tt.found, found)
		}
	}
}

func nodesEqual(a, b node) bool {
	if a.name != b.name ||
		a.line != b.line ||
		!reflect.DeepEqual(a.field, b.field) ||
		len(a.children) != len(b.children) {
		return false
	}
	for i := 0; i < len(a.children); i++ {
		if !nodesEqual(a.children[i], b.children[i]) {
			return false
		}
	}
	return true
}