package index

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

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

// TestISMPolicyManager_PutPolicy_Validation tests policy validation
func TestISMPolicyManager_PutPolicy_Validation(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)
	}

	pm := NewISMPolicyManager(c)
	ctx := context.Background()

	tests := []struct {
		name       string
		policyName string
		policy     *Policy
		wantErr    bool
	}{
		{
			name:       "empty policy name",
			policyName: "",
			policy: &Policy{
				DefaultState: "hot",
				States:       []State{{Name: "hot"}},
			},
			wantErr: true,
		},
		{
			name:       "invalid policy - nil",
			policyName: "test",
			policy:     nil,
			wantErr:    true,
		},
		{
			name:       "invalid policy - no states",
			policyName: "test",
			policy: &Policy{
				Description: "Test",
			},
			wantErr: true,
		},
		{
			name:       "invalid policy - missing default_state",
			policyName: "test",
			policy: &Policy{
				States: []State{{Name: "hot"}},
			},
			wantErr: true,
		},
		{
			name:       "invalid policy - default_state not in states",
			policyName: "test",
			policy: &Policy{
				DefaultState: "cold",
				States:       []State{{Name: "hot"}},
			},
			wantErr: true,
		},
	}

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

// TestISMPolicyManager_GetPolicy_NotFound tests GetPolicy when policy doesn't exist
func TestISMPolicyManager_GetPolicy_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)
	}

	pm := NewISMPolicyManager(c)
	ctx := context.Background()

	_, err = pm.GetPolicy(ctx, "non-existent-policy-12345")
	if err == nil {
		t.Error("GetPolicy() should return error for non-existent policy")
	}
}

// TestISMPolicyManager_DeletePolicy_NotFound tests DeletePolicy when policy doesn't exist
func TestISMPolicyManager_DeletePolicy_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)
	}

	pm := NewISMPolicyManager(c)
	ctx := context.Background()

	err = pm.DeletePolicy(ctx, "non-existent-policy-12345")
	if err == nil {
		t.Error("DeletePolicy() should return error for non-existent policy")
	}
}

// TestISMPolicyManager_ListPolicies_EmptyCheck tests ListPolicies returns valid map
func TestISMPolicyManager_ListPolicies_EmptyCheck(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)
	}

	pm := NewISMPolicyManager(c)
	ctx := context.Background()

	policies, err := pm.ListPolicies(ctx)
	if err != nil {
		t.Fatalf("ListPolicies() error = %v", err)
	}

	if policies == nil {
		t.Error("ListPolicies() should not return nil map")
	}
}

// TestPolicy_ValidateEdgeCases tests additional edge cases for policy validation
func TestPolicy_ValidateEdgeCases(t *testing.T) {
	tests := []struct {
		name    string
		policy  *Policy
		wantErr bool
	}{
		{
			name:    "nil policy",
			policy:  nil,
			wantErr: true,
		},
		{
			name: "empty states and empty phases",
			policy: &Policy{
				Description: "Empty policy",
			},
			wantErr: true,
		},
		{
			name: "both ISM states and ILM phases",
			policy: &Policy{
				DefaultState: "hot",
				States:       []State{{Name: "hot"}},
				Phases: map[string]Phase{
					"hot": {MinAge: "0ms"},
				},
			},
			wantErr: true,
		},
		{
			name: "valid ISM policy with transitions",
			policy: &Policy{
				Description:  "Test",
				DefaultState: "hot",
				States: []State{
					{
						Name: "hot",
						Transitions: []Transition{
							{
								StateName: "warm",
								Conditions: &Conditions{
									MinIndexAge: "1d",
								},
							},
						},
					},
					{
						Name: "warm",
					},
				},
			},
			wantErr: false,
		},
		{
			name: "valid ISM policy with actions",
			policy: &Policy{
				DefaultState: "hot",
				States: []State{
					{
						Name: "hot",
						Actions: []Action{
							{
								Config: map[string]interface{}{
									"rollover": map[string]interface{}{
										"min_index_age": "1d",
									},
								},
							},
						},
					},
				},
			},
			wantErr: false,
		},
		{
			name: "valid ILM policy with multiple phases",
			policy: &Policy{
				Description: "ILM policy",
				Phases: map[string]Phase{
					"hot": {
						MinAge: "0ms",
						Actions: map[string]interface{}{
							"rollover": map[string]interface{}{
								"max_age": "30d",
							},
						},
					},
					"delete": {
						MinAge: "90d",
						Actions: map[string]interface{}{
							"delete": map[string]interface{}{},
						},
					},
				},
			},
			wantErr: false,
		},
	}

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

// TestPolicy_JSONMarshaling tests policy JSON marshaling
func TestPolicy_JSONMarshaling(t *testing.T) {
	policy := &Policy{
		Description:  "Test policy",
		DefaultState: "hot",
		States: []State{
			{
				Name: "hot",
				Actions: []Action{
					{
						Config: map[string]interface{}{
							"rollover": map[string]interface{}{
								"min_index_age": "1d",
							},
						},
					},
				},
			},
		},
		ISMTemplate: []ISMTemplate{
			{
				IndexPatterns: []string{"test-*"},
				Priority:      100,
			},
		},
	}

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

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

	// Verify
	if decoded.Description != policy.Description {
		t.Errorf("Description = %v, want %v", decoded.Description, policy.Description)
	}

	if decoded.DefaultState != policy.DefaultState {
		t.Errorf("DefaultState = %v, want %v", decoded.DefaultState, policy.DefaultState)
	}

	if len(decoded.States) != len(policy.States) {
		t.Errorf("States length = %d, want %d", len(decoded.States), len(policy.States))
	}

	if len(decoded.ISMTemplate) != len(policy.ISMTemplate) {
		t.Errorf("ISMTemplate length = %d, want %d", len(decoded.ISMTemplate), len(policy.ISMTemplate))
	}
}

// TestPolicy_MarshalError tests error handling in policy marshaling
func TestPolicy_MarshalError(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)
	}

	pm := NewISMPolicyManager(c)
	ctx := context.Background()

	// 创建一个包含不可序列化数据的策略
	policy := &Policy{
		DefaultState: "hot",
		States: []State{
			{
				Name: "hot",
				Actions: []Action{
					{
						Config: map[string]interface{}{
							"invalid": make(chan int), // channels 不能被 JSON 序列化
						},
					},
				},
			},
		},
	}

	err = pm.PutPolicy(ctx, "test", policy)
	if err == nil {
		t.Error("PutPolicy() should return error for invalid JSON")
	}
	if !strings.Contains(err.Error(), "marshal") {
		t.Errorf("Error should mention marshal, got: %v", err)
	}
}

// TestState_Transitions tests state transition logic
func TestState_Transitions(t *testing.T) {
	state := State{
		Name: "hot",
		Transitions: []Transition{
			{
				StateName: "warm",
				Conditions: &Conditions{
					MinIndexAge: "1d",
				},
			},
			{
				StateName: "delete",
				Conditions: &Conditions{
					MinIndexAge: "7d",
				},
			},
		},
	}

	if len(state.Transitions) != 2 {
		t.Errorf("Expected 2 transitions, got %d", len(state.Transitions))
	}

	if state.Transitions[0].StateName != "warm" {
		t.Errorf("First transition state = %v, want warm", state.Transitions[0].StateName)
	}

	if state.Transitions[1].Conditions.MinIndexAge != "7d" {
		t.Errorf("Second transition min_index_age = %v, want 7d", state.Transitions[1].Conditions.MinIndexAge)
	}
}

// TestAction_Config tests action configuration
func TestAction_Config(t *testing.T) {
	action := Action{
		Config: map[string]interface{}{
			"rollover": map[string]interface{}{
				"min_index_age": "1d",
				"min_doc_count": 1000000,
			},
		},
	}

	rollover, ok := action.Config["rollover"].(map[string]interface{})
	if !ok {
		t.Fatal("Failed to get rollover config")
	}

	if rollover["min_index_age"] != "1d" {
		t.Errorf("min_index_age = %v, want 1d", rollover["min_index_age"])
	}

	if rollover["min_doc_count"] != 1000000 {
		t.Errorf("min_doc_count = %v, want 1000000", rollover["min_doc_count"])
	}
}

// TestISMTemplate_Patterns tests ISM template index patterns
func TestISMTemplate_Patterns(t *testing.T) {
	template := ISMTemplate{
		IndexPatterns: []string{"logs-*", "metrics-*", "traces-*"},
		Priority:      100,
	}

	if len(template.IndexPatterns) != 3 {
		t.Errorf("Expected 3 index patterns, got %d", len(template.IndexPatterns))
	}

	if template.Priority != 100 {
		t.Errorf("Priority = %d, want 100", template.Priority)
	}

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

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

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