package index

import (
	"context"
	"encoding/json"
	"testing"

	"es-demo/client"
	"es-demo/config"
)

// TestPutTemplate_Validation tests template validation in PutTemplate
func TestPutTemplate_Validation(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	// 加载真实配置用于集成测试
	if err := config.Load(".env"); err != nil {
		t.Logf("warning: failed to load .env file: %v", err)
	}
	config.Init()

	cfg := &client.Config{
		Endpoint:  config.Endpoint,
		Region:    config.Region,
		AccessKey: config.AccessKey,
		SecretKey: config.SecretKey,
	}

	c, err := client.NewClient(cfg)
	if err != nil {
		t.Fatalf("failed to create client: %v", err)
	}

	ctx := context.Background()

	tests := []struct {
		name     string
		tmplName string
		template *Template
		wantErr  bool
	}{
		{
			name:     "empty template name",
			tmplName: "",
			template: &Template{
				IndexPatterns: []string{"test-*"},
			},
			wantErr: true,
		},
		{
			name:     "nil template",
			tmplName: "test",
			template: nil,
			wantErr:  true,
		},
		{
			name:     "empty index patterns",
			tmplName: "test",
			template: &Template{
				IndexPatterns: []string{},
			},
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := PutTemplate(ctx, c, tt.tmplName, tt.template)
			if (err != nil) != tt.wantErr {
				t.Errorf("PutTemplate() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

// TestGetTemplate_NotFound tests GetTemplate when template doesn't exist
func TestGetTemplate_NotFound(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	if err := config.Load(".env"); err != nil {
		t.Logf("warning: failed to load .env file: %v", err)
	}
	config.Init()

	cfg := &client.Config{
		Endpoint:  config.Endpoint,
		Region:    config.Region,
		AccessKey: config.AccessKey,
		SecretKey: config.SecretKey,
	}

	c, err := client.NewClient(cfg)
	if err != nil {
		t.Fatalf("failed to create client: %v", err)
	}

	ctx := context.Background()

	// 尝试获取不存在的模板
	_, err = GetTemplate(ctx, c, "non-existent-template-12345")
	if err == nil {
		t.Error("GetTemplate() should return error for non-existent template")
	}
}

// TestDeleteTemplate_NotFound tests DeleteTemplate when template doesn't exist
func TestDeleteTemplate_NotFound(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	if err := config.Load(".env"); err != nil {
		t.Logf("warning: failed to load .env file: %v", err)
	}
	config.Init()

	cfg := &client.Config{
		Endpoint:  config.Endpoint,
		Region:    config.Region,
		AccessKey: config.AccessKey,
		SecretKey: config.SecretKey,
	}

	c, err := client.NewClient(cfg)
	if err != nil {
		t.Fatalf("failed to create client: %v", err)
	}

	ctx := context.Background()

	// 尝试删除不存在的模板
	err = DeleteTemplate(ctx, c, "non-existent-template-12345")
	if err == nil {
		t.Error("DeleteTemplate() should return error for non-existent template")
	}
}

// TestValidateTemplate_EdgeCases tests edge cases in template validation
func TestValidateTemplate_EdgeCases(t *testing.T) {
	tests := []struct {
		name     string
		template *Template
		wantErr  bool
	}{
		{
			name:     "nil template",
			template: nil,
			wantErr:  true,
		},
		{
			name: "empty index patterns",
			template: &Template{
				IndexPatterns: []string{},
			},
			wantErr: true,
		},
		{
			name: "nil index patterns",
			template: &Template{
				IndexPatterns: nil,
			},
			wantErr: true,
		},
		{
			name: "valid minimal template",
			template: &Template{
				IndexPatterns: []string{"test-*"},
			},
			wantErr: false,
		},
		{
			name: "valid template with settings",
			template: &Template{
				IndexPatterns: []string{"logs-*", "metrics-*"},
				Settings: map[string]any{
					"number_of_shards": 2,
				},
			},
			wantErr: false,
		},
		{
			name: "valid template with all fields",
			template: &Template{
				IndexPatterns: []string{"app-*"},
				Settings: map[string]any{
					"number_of_shards": 1,
				},
				Mappings: map[string]any{
					"properties": map[string]any{
						"timestamp": map[string]any{
							"type": "date",
						},
					},
				},
				Aliases: map[string]any{
					"my-alias": map[string]any{},
				},
				Priority: 100,
				Version:  1,
			},
			wantErr: false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := validateTemplate(tt.template)
			if (err != nil) != tt.wantErr {
				t.Errorf("validateTemplate() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

// TestListTemplates_EmptyResponse tests ListTemplates with no templates
func TestListTemplates_EmptyResponse(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	if err := config.Load(".env"); err != nil {
		t.Logf("warning: failed to load .env file: %v", err)
	}
	config.Init()

	cfg := &client.Config{
		Endpoint:  config.Endpoint,
		Region:    config.Region,
		AccessKey: config.AccessKey,
		SecretKey: config.SecretKey,
	}

	c, err := client.NewClient(cfg)
	if err != nil {
		t.Fatalf("failed to create client: %v", err)
	}

	ctx := context.Background()

	// ListTemplates 应该始终返回至少一个空的 map
	templates, err := ListTemplates(ctx, c)
	if err != nil {
		t.Fatalf("ListTemplates() error = %v", err)
	}

	if templates == nil {
		t.Error("ListTemplates() should not return nil map")
	}
}

// TestTemplate_JSONMarshaling tests template JSON marshaling
func TestTemplate_JSONMarshaling(t *testing.T) {
	template := &Template{
		IndexPatterns: []string{"test-*"},
		Settings: map[string]any{
			"number_of_shards": 1,
		},
		Mappings: map[string]any{
			"properties": map[string]any{
				"field1": map[string]any{
					"type": "text",
				},
			},
		},
		Priority: 100,
	}

	// Marshal
	data, err := json.Marshal(template)
	if err != nil {
		t.Fatalf("json.Marshal() error = %v", err)
	}

	// Unmarshal
	var decoded Template
	if err := json.Unmarshal(data, &decoded); err != nil {
		t.Fatalf("json.Unmarshal() error = %v", err)
	}

	// Verify
	if len(decoded.IndexPatterns) != len(template.IndexPatterns) {
		t.Errorf("IndexPatterns length = %d, want %d", len(decoded.IndexPatterns), len(template.IndexPatterns))
	}

	if decoded.Priority != template.Priority {
		t.Errorf("Priority = %d, want %d", decoded.Priority, template.Priority)
	}
}