package runtime

import (
	"context"
	"net/http"
	"strings"
	"testing"

	"code.tczkiot.com/wlw/ai-agent/contract"
	"code.tczkiot.com/wlw/ai-agent/internal/ai"
	"code.tczkiot.com/wlw/ai-agent/internal/models"
	"code.tczkiot.com/wlw/ai-agent/internal/pkg/enums"

	"github.com/glebarez/sqlite"
	"github.com/mlogclub/simple/sqls"
	"gorm.io/gorm"
)

type runtimePlatformAIProvider struct{}

func (runtimePlatformAIProvider) ModelSource(context.Context) (string, error) {
	return contract.ModelSourcePlatform, nil
}

type runtimeVisionOnlyPlatformAIProvider struct{}

func (runtimeVisionOnlyPlatformAIProvider) ModelSource(context.Context) (string, error) {
	return contract.ModelSourcePlatform, nil
}

func (runtimeVisionOnlyPlatformAIProvider) Config(context.Context) (*contract.PlatformAIConfig, error) {
	return &contract.PlatformAIConfig{
		APIKey:        "platform-managed",
		BaseURL:       "https://platform.example/v1",
		ChatEnabled:   false,
		ChatModel:     "qwen-plus",
		VisionEnabled: true,
		VisionModel:   "qwen3-vl-plus",
	}, nil
}

func (runtimeVisionOnlyPlatformAIProvider) Status(context.Context) (*contract.PlatformAIStatus, error) {
	return &contract.PlatformAIStatus{VisionEnabled: true, VisionModel: "qwen3-vl-plus"}, nil
}

func (runtimePlatformAIProvider) Config(context.Context) (*contract.PlatformAIConfig, error) {
	return &contract.PlatformAIConfig{
		APIKey:        "license-signed",
		BaseURL:       "https://platform.example/v1",
		ModelName:     "platform-default",
		TimeoutMS:     30000,
		MaxRetryCount: 1,
		HTTPClient:    &http.Client{},
	}, nil
}

func (runtimePlatformAIProvider) Status(context.Context) (*contract.PlatformAIStatus, error) {
	return &contract.PlatformAIStatus{Enabled: true}, nil
}

func TestAgentApplicationServiceLoadsConsistentPersistedRequest(t *testing.T) {
	db, err := gorm.Open(sqlite.Open("file:"+strings.ReplaceAll(t.Name(), "/", "_")+"?mode=memory&cache=shared"), &gorm.Config{})
	if err != nil {
		t.Fatalf("open sqlite: %v", err)
	}
	if err := db.AutoMigrate(&models.AIConfig{}, &models.AIAgent{}, &models.Conversation{}, &models.Message{}); err != nil {
		t.Fatalf("auto migrate: %v", err)
	}
	sqls.SetDB(db)
	config := &models.AIConfig{Status: enums.StatusOk, ModelName: "test-model"}
	if err := db.Create(config).Error; err != nil {
		t.Fatalf("create config: %v", err)
	}
	agent := &models.AIAgent{Name: "agent", Status: enums.StatusOk, AIConfigID: config.ID}
	if err := db.Create(agent).Error; err != nil {
		t.Fatalf("create agent: %v", err)
	}
	conversation := &models.Conversation{AIAgentID: agent.ID}
	if err := db.Create(conversation).Error; err != nil {
		t.Fatalf("create conversation: %v", err)
	}
	message := &models.Message{ConversationID: conversation.ID, SenderType: enums.IMSenderTypeCustomer, MessageType: enums.IMMessageTypeText, Content: "hello"}
	if err := db.Create(message).Error; err != nil {
		t.Fatalf("create message: %v", err)
	}
	req, err := NewAgentApplicationService().loadRequest(ApplicationRunInput{ConversationID: conversation.ID, MessageID: message.ID, AIAgentID: agent.ID})
	if err != nil {
		t.Fatalf("loadRequest: %v", err)
	}
	if req.Conversation.ID != conversation.ID || req.UserMessage.ID != message.ID || req.AIAgent.ID != agent.ID || req.AIConfig.ID != config.ID {
		t.Fatalf("unexpected request: %#v", req)
	}
}

func TestAgentApplicationServiceRejectsMismatchedMessage(t *testing.T) {
	service := NewAgentApplicationService()
	if _, err := service.loadRequest(ApplicationRunInput{ConversationID: 1, MessageID: 0, AIAgentID: 1}); err == nil {
		t.Fatal("expected invalid identifiers error")
	}
}

func TestResolveRuntimeAIConfigUsesPlatformWithoutCustomConfig(t *testing.T) {
	ai.SetPlatformAIProvider(runtimePlatformAIProvider{})
	t.Cleanup(func() { ai.SetPlatformAIProvider(nil) })

	config, err := ResolveRuntimeAIConfig(context.Background(), 0)
	if err != nil {
		t.Fatalf("ResolveRuntimeAIConfig() error = %v", err)
	}
	if !config.Platform || config.ModelName != "platform-default" || config.APIKey != "license-signed" {
		t.Fatalf("ResolveRuntimeAIConfig() = %+v", config)
	}
}

func TestResolveRuntimeAIConfigForImageUsesVisionWhenChatIsDisabled(t *testing.T) {
	ai.SetPlatformAIProvider(runtimeVisionOnlyPlatformAIProvider{})
	t.Cleanup(func() { ai.SetPlatformAIProvider(nil) })

	config, err := ResolveRuntimeAIConfigForMessage(context.Background(), 0, enums.IMMessageTypeImage)
	if err != nil {
		t.Fatalf("ResolveRuntimeAIConfigForMessage(image) error = %v", err)
	}
	if config.ModelName != "qwen3-vl-plus" || !config.VisionEnabled {
		t.Fatalf("ResolveRuntimeAIConfigForMessage(image) = %+v", config)
	}
	if _, err := ResolveRuntimeAIConfigForMessage(context.Background(), 0, enums.IMMessageTypeText); err == nil || !strings.Contains(err.Error(), "chat model is not enabled") {
		t.Fatalf("text must still require chat capability, got %v", err)
	}
}