package engine

import (
	"testing"

	"git.kingecg.top/kingecg/gomog/pkg/types"
)

// TestExpr 测试 $expr 操作符
func TestExpr(t *testing.T) {
	tests := []struct {
		name     string
		doc      map[string]interface{}
		filter   types.Filter
		expected bool
	}{
		{
			name: "simple comparison with $expr",
			doc:  map[string]interface{}{"qty": 10, "minQty": 5},
			filter: types.Filter{
				"$expr": types.Filter{
					"$gt": []interface{}{"$qty", "$minQty"},
				},
			},
			expected: true,
		},
		{
			name: "comparison fails with $expr",
			doc:  map[string]interface{}{"qty": 3, "minQty": 5},
			filter: types.Filter{
				"$expr": map[string]interface{}{
					"$gt": []interface{}{"$qty", "$minQty"},
				},
			},
			expected: false,
		},
		{
			name: "equality check with $expr",
			doc:  map[string]interface{}{"a": 5, "b": 5},
			filter: types.Filter{
				"$expr": types.Filter{
					"$eq": []interface{}{"$a", "$b"},
				},
			},
			expected: true,
		},
		{
			name: "arithmetic in $expr",
			doc:  map[string]interface{}{"price": 100, "tax": 10},
			filter: types.Filter{
				"$expr": types.Filter{
					"$gt": []interface{}{
						types.Filter{"$add": []interface{}{"$price", "$tax"}},
						float64(100),
					},
				},
			},
			expected: true,
		},
		{
			name: "conditional in $expr",
			doc:  map[string]interface{}{"score": 85},
			filter: types.Filter{
				"$expr": types.Filter{
					"$gte": []interface{}{"$score", float64(80)},
				},
			},
			expected: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := MatchFilter(tt.doc, tt.filter)
			if result != tt.expected {
				t.Errorf("MatchFilter() = %v, want %v", result, tt.expected)
			}
		})
	}
}

// TestJSONSchema 测试 $jsonSchema 验证操作符
func TestJSONSchema(t *testing.T) {
	tests := []struct {
		name     string
		doc      map[string]interface{}
		schema   map[string]interface{}
		expected bool
	}{
		{
			name: "bsonType object validation",
			doc:  map[string]interface{}{"name": "Alice", "age": 25},
			schema: map[string]interface{}{
				"bsonType": "object",
			},
			expected: true,
		},
		{
			name: "required fields validation",
			doc:  map[string]interface{}{"name": "Alice", "age": 25},
			schema: map[string]interface{}{
				"bsonType": "object",
				"required": []interface{}{"name", "age"},
			},
			expected: true,
		},
		{
			name: "required fields missing",
			doc:  map[string]interface{}{"name": "Alice"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"required": []interface{}{"name", "email"},
			},
			expected: false,
		},
		{
			name: "properties validation",
			doc:  map[string]interface{}{"name": "Alice", "age": 25},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"name": map[string]interface{}{"bsonType": "string"},
					"age":  map[string]interface{}{"bsonType": "int"},
				},
			},
			expected: true,
		},
		{
			name: "enum validation",
			doc:  map[string]interface{}{"status": "active"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"status": map[string]interface{}{
						"enum": []interface{}{"active", "inactive", "pending"},
					},
				},
			},
			expected: true,
		},
		{
			name: "enum validation fails",
			doc:  map[string]interface{}{"status": "unknown"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"status": map[string]interface{}{
						"enum": []interface{}{"active", "inactive"},
					},
				},
			},
			expected: false,
		},
		{
			name: "minimum validation",
			doc:  map[string]interface{}{"age": 25},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"age": map[string]interface{}{
						"bsonType": "int",
						"minimum":  float64(0),
						"maximum":  float64(150),
					},
				},
			},
			expected: true,
		},
		{
			name: "minimum validation fails",
			doc:  map[string]interface{}{"age": -5},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"age": map[string]interface{}{
						"minimum": float64(0),
					},
				},
			},
			expected: false,
		},
		{
			name: "minLength validation",
			doc:  map[string]interface{}{"name": "Alice"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"name": map[string]interface{}{
						"bsonType":  "string",
						"minLength": float64(1),
						"maxLength": float64(50),
					},
				},
			},
			expected: true,
		},
		{
			name: "pattern validation",
			doc:  map[string]interface{}{"email": "test@example.com"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"email": map[string]interface{}{
						"bsonType": "string",
						"pattern":  `^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`,
					},
				},
			},
			expected: true,
		},
		{
			name: "pattern validation fails",
			doc:  map[string]interface{}{"email": "invalid-email"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"email": map[string]interface{}{
						"pattern": `^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`,
					},
				},
			},
			expected: false,
		},
		{
			name: "array items validation",
			doc:  map[string]interface{}{"scores": []interface{}{85, 90, 95}},
			schema: map[string]interface{}{
				"bsonType": "object",
				"properties": map[string]interface{}{
					"scores": map[string]interface{}{
						"bsonType": "array",
						"items": map[string]interface{}{
							"bsonType": "int",
						},
					},
				},
			},
			expected: true,
		},
		{
			name: "anyOf validation",
			doc:  map[string]interface{}{"type": "A", "fieldA": "value"},
			schema: map[string]interface{}{
				"bsonType": "object",
				"anyOf": []interface{}{
					map[string]interface{}{
						"properties": map[string]interface{}{
							"type":   map[string]interface{}{"enum": []interface{}{"A"}},
							"fieldA": map[string]interface{}{"bsonType": "string"},
						},
					},
					map[string]interface{}{
						"properties": map[string]interface{}{
							"type":   map[string]interface{}{"enum": []interface{}{"B"}},
							"fieldB": map[string]interface{}{"bsonType": "int"},
						},
					},
				},
			},
			expected: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			filter := types.Filter{"$jsonSchema": tt.schema}
			result := MatchFilter(tt.doc, filter)
			if result != tt.expected {
				t.Errorf("MatchFilter with $jsonSchema() = %v, want %v", result, tt.expected)
			}
		})
	}
}

// TestIsTrueValue 测试 isTrueValue 辅助函数
func TestIsTrueValue(t *testing.T) {
	tests := []struct {
		name     string
		value    interface{}
		expected bool
	}{
		{"nil value", nil, false},
		{"bool true", true, true},
		{"bool false", false, false},
		{"int non-zero", 42, true},
		{"int zero", 0, false},
		{"float64 non-zero", 3.14, true},
		{"float64 zero", 0.0, false},
		{"string non-empty", "hello", true},
		{"string empty", "", false},
		{"array non-empty", []interface{}{1, 2}, true},
		{"array empty", []interface{}{}, false},
		{"map non-empty", map[string]interface{}{"a": 1}, true},
		{"map empty", map[string]interface{}{}, false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := isTrueValue(tt.value)
			if result != tt.expected {
				t.Errorf("isTrueValue(%v) = %v, want %v", tt.value, result, tt.expected)
			}
		})
	}
}