package llm

import (
	"encoding/json"
	"testing"

	"github.com/stretchr/testify/assert"

	"github.com/mayswind/ezbookkeeping/pkg/core"
)

func TestOllamaLargeLanguageModelProvider_buildJsonRequestBody_TextualUserPrompt(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{
		OllamaModelID: "test",
	}

	request := &LargeLanguageModelRequest{
		SystemPrompt: "You are a helpful assistant.",
		UserPrompt:   []byte("Hello, how are you?"),
	}

	bodyBytes, err := provider.buildJsonRequestBody(core.NewNullContext(), 0, request, LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.Nil(t, err)

	var body map[string]interface{}
	err = json.Unmarshal(bodyBytes, &body)
	assert.Nil(t, err)

	assert.Equal(t, "{\"format\":\"json\",\"messages\":[{\"content\":\"You are a helpful assistant.\",\"role\":\"system\"},{\"content\":\"Hello, how are you?\",\"role\":\"user\"}],\"model\":\"test\",\"stream\":false}", string(bodyBytes))
}

func TestOllamaLargeLanguageModelProvider_buildJsonRequestBody_ImageUserPrompt(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{
		OllamaModelID: "test",
	}

	request := &LargeLanguageModelRequest{
		SystemPrompt:   "What's in this image?",
		UserPrompt:     []byte("fakedata"),
		UserPromptType: LARGE_LANGUAGE_MODEL_REQUEST_PROMPT_TYPE_IMAGE_URL,
	}

	bodyBytes, err := provider.buildJsonRequestBody(core.NewNullContext(), 0, request, LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.Nil(t, err)

	var body map[string]interface{}
	err = json.Unmarshal(bodyBytes, &body)
	assert.Nil(t, err)

	assert.Equal(t, "{\"format\":\"json\",\"messages\":[{\"content\":\"What's in this image?\",\"role\":\"system\"},{\"content\":\"\",\"images\":[\"ZmFrZWRhdGE=\"],\"role\":\"user\"}],\"model\":\"test\",\"stream\":false}", string(bodyBytes))
}

func TestOllamaLargeLanguageModelProvider_ParseTextualResponse_ValidJsonResponse(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{}

	response := `{
		"model": "test",
		"created_at": "2025-09-01T01:02:03.456789Z",
		"message": {
			"role": "assistant",
			"content": "This is a test response"
		}
	}`

	result, err := provider.ParseTextualResponse(core.NewNullContext(), 0, []byte(response), LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.Nil(t, err)
	assert.Equal(t, "This is a test response", result.Content)
}

func TestOllamaLargeLanguageModelProvider_ParseTextualResponse_EmptyResponse(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{}

	response := `{
		"model": "test",
		"created_at": "2025-09-01T01:02:03.456789Z",
		"message": {
			"role": "assistant",
			"content": ""
		}
	}`

	result, err := provider.ParseTextualResponse(core.NewNullContext(), 0, []byte(response), LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.Nil(t, err)
	assert.Equal(t, "", result.Content)
}

func TestOllamaLargeLanguageModelProvider_ParseTextualResponse_EmptyChoices(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{}

	response := `{
		"model": "test",
		"created_at": "2025-09-01T01:02:03.456789Z",
		"message": {}
	}`

	_, err := provider.ParseTextualResponse(core.NewNullContext(), 0, []byte(response), LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.EqualError(t, err, "failed to request third party api")
}

func TestOllamaLargeLanguageModelProvider_ParseTextualResponse_NoChoiceContent(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{}

	response := `{
		"model": "test",
		"created_at": "2025-09-01T01:02:03.456789Z",
		"message": {
			"role": "assistant"
		}
	}`

	_, err := provider.ParseTextualResponse(core.NewNullContext(), 0, []byte(response), LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.EqualError(t, err, "failed to request third party api")
}

func TestOllamaLargeLanguageModelProvider_ParseTextualResponse_InvalidJson(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{}

	response := "error"

	_, err := provider.ParseTextualResponse(core.NewNullContext(), 0, []byte(response), LARGE_LANGUAGE_MODEL_RESPONSE_FORMAT_JSON)
	assert.EqualError(t, err, "failed to request third party api")
}

func TestOllamaLargeLanguageModelProvider_GetOllamaRequestUrl(t *testing.T) {
	provider := &OllamaLargeLanguageModelProvider{
		OllamaServerURL: "http://localhost:11434/",
	}
	url := provider.getOllamaRequestUrl()
	assert.Equal(t, "http://localhost:11434/api/chat", url)

	provider = &OllamaLargeLanguageModelProvider{
		OllamaServerURL: "http://localhost:11434",
	}
	url = provider.getOllamaRequestUrl()
	assert.Equal(t, "http://localhost:11434/api/chat", url)

	provider = &OllamaLargeLanguageModelProvider{
		OllamaServerURL: "http://example.com/ollama/",
	}
	url = provider.getOllamaRequestUrl()
	assert.Equal(t, "http://example.com/ollama/api/chat", url)
}