package openai

import (
	"bytes"
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/QuantumNous/new-api/common"
	"github.com/QuantumNous/new-api/constant"
	relaycommon "github.com/QuantumNous/new-api/relay/common"
	"github.com/QuantumNous/new-api/relaykit/dto"
	"github.com/QuantumNous/new-api/setting/operation_setting"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestOaiResponsesHandlerCountsOutputCallsNotDeclarations(t *testing.T) {
	gin.SetMode(gin.TestMode)
	operation_setting.SetToolPriceForTest("priced_fn", 5.0)
	t.Cleanup(func() {
		operation_setting.DeleteToolPriceForTest("priced_fn")
	})

	body, err := common.Marshal(dto.OpenAIResponsesResponse{
		Tools: []map[string]any{
			{"type": "web_search_preview"},
			{"type": "file_search"},
		},
		Output: []dto.ResponsesOutput{
			{Type: dto.BuildInCallWebSearchCall},
			{Type: dto.BuildInCallWebSearchCall},
			{Type: dto.BuildInCallFunctionCall, Name: "priced_fn"},
			{Type: dto.BuildInCallFunctionCall, Name: "unpriced_fn"},
		},
		Usage: &dto.Usage{InputTokens: 1, OutputTokens: 1, TotalTokens: 2},
	})
	require.NoError(t, err)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", nil)

	info := &relaycommon.RelayInfo{
		OriginModelName: "gpt-5.1",
		ResponsesUsageInfo: &relaycommon.ResponsesUsageInfo{
			BuiltInTools: map[string]*relaycommon.BuildInToolInfo{
				dto.BuildInToolWebSearchPreview: {ToolName: dto.BuildInToolWebSearchPreview, CallCount: 0},
				dto.BuildInToolFileSearch:       {ToolName: dto.BuildInToolFileSearch, CallCount: 0},
			},
		},
	}
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(bytes.NewReader(body)),
		Header:     http.Header{"Content-Type": []string{"application/json"}},
	}

	usage, apiErr := OaiResponsesHandler(c, info, resp)
	require.Nil(t, apiErr)
	require.NotNil(t, usage)
	assert.Equal(t, 2, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolWebSearchPreview].CallCount)
	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolFileSearch].CallCount)
	require.Contains(t, info.ResponsesUsageInfo.BuiltInTools, "priced_fn")
	assert.Equal(t, 1, info.ResponsesUsageInfo.BuiltInTools["priced_fn"].CallCount)
	assert.NotContains(t, info.ResponsesUsageInfo.BuiltInTools, "unpriced_fn")
}

func TestOaiResponsesHandlerDeclaredToolsWithoutOutputCountZero(t *testing.T) {
	gin.SetMode(gin.TestMode)

	body, err := common.Marshal(dto.OpenAIResponsesResponse{
		Tools: []map[string]any{
			{"type": "web_search_preview"},
			{"type": "file_search"},
		},
		Output: []dto.ResponsesOutput{
			{Type: "message", Role: "assistant"},
		},
		Usage: &dto.Usage{InputTokens: 1, OutputTokens: 1, TotalTokens: 2},
	})
	require.NoError(t, err)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", nil)

	info := &relaycommon.RelayInfo{
		OriginModelName: "gpt-5.1",
		ResponsesUsageInfo: &relaycommon.ResponsesUsageInfo{
			BuiltInTools: map[string]*relaycommon.BuildInToolInfo{
				dto.BuildInToolWebSearchPreview: {ToolName: dto.BuildInToolWebSearchPreview, CallCount: 0},
				dto.BuildInToolFileSearch:       {ToolName: dto.BuildInToolFileSearch, CallCount: 0},
			},
		},
	}
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(bytes.NewReader(body)),
		Header:     http.Header{"Content-Type": []string{"application/json"}},
	}

	_, apiErr := OaiResponsesHandler(c, info, resp)
	require.Nil(t, apiErr)
	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolWebSearchPreview].CallCount)
	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolFileSearch].CallCount)
}

func TestOaiResponsesHandlerCountsCompletedImageGenerationOutputs(t *testing.T) {
	gin.SetMode(gin.TestMode)

	body, err := common.Marshal(dto.OpenAIResponsesResponse{
		Status: []byte(`"completed"`),
		Output: []dto.ResponsesOutput{
			{
				Type:   dto.ResponsesOutputTypeImageGenerationCall,
				ID:     "img_1",
				Status: "completed",
				Result: "base64-a",
			},
			{
				Type:   dto.ResponsesOutputTypeImageGenerationCall,
				ID:     "img_2",
				Status: "completed",
				Result: "base64-b",
			},
			{
				Type:   dto.ResponsesOutputTypeImageGenerationCall,
				ID:     "img_empty",
				Status: "completed",
				Result: "",
			},
		},
		Usage: &dto.Usage{InputTokens: 1, OutputTokens: 1, TotalTokens: 2},
	})
	require.NoError(t, err)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
	info := &relaycommon.RelayInfo{OriginModelName: "gpt-5.1"}
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(bytes.NewReader(body)),
		Header:     http.Header{"Content-Type": []string{"application/json"}},
	}

	_, apiErr := OaiResponsesHandler(c, info, resp)
	require.Nil(t, apiErr)
	require.Contains(t, info.ResponsesUsageInfo.BuiltInTools, dto.BuildInToolImageGeneration)
	assert.Equal(t, 2, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolImageGeneration].CallCount)
	assert.False(t, c.GetBool("image_generation_call"))
}

func TestOaiResponsesHandlerIncompleteStatusCommitsZeroImageGeneration(t *testing.T) {
	gin.SetMode(gin.TestMode)

	body, err := common.Marshal(dto.OpenAIResponsesResponse{
		Status: []byte(`"incomplete"`),
		Output: []dto.ResponsesOutput{
			{
				Type:   dto.ResponsesOutputTypeImageGenerationCall,
				ID:     "img_1",
				Status: "completed",
				Result: "base64-a",
			},
		},
		Usage: &dto.Usage{InputTokens: 1, OutputTokens: 1, TotalTokens: 2},
	})
	require.NoError(t, err)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
	info := &relaycommon.RelayInfo{
		OriginModelName: "gpt-5.1",
		ResponsesUsageInfo: &relaycommon.ResponsesUsageInfo{
			BuiltInTools: map[string]*relaycommon.BuildInToolInfo{
				dto.BuildInToolImageGeneration: {ToolName: dto.BuildInToolImageGeneration, CallCount: 0},
			},
		},
	}
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(bytes.NewReader(body)),
		Header:     http.Header{"Content-Type": []string{"application/json"}},
	}

	_, apiErr := OaiResponsesHandler(c, info, resp)
	require.Nil(t, apiErr)
	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolImageGeneration].CallCount)
}

func runResponsesImageBillingStream(t *testing.T, events ...string) *relaycommon.RelayInfo {
	t.Helper()
	gin.SetMode(gin.TestMode)
	oldTimeout := constant.StreamingTimeout
	constant.StreamingTimeout = 30
	t.Cleanup(func() {
		constant.StreamingTimeout = oldTimeout
	})

	var body strings.Builder
	for _, event := range events {
		body.WriteString("data: ")
		body.WriteString(event)
		body.WriteString("\n\n")
	}
	body.WriteString("data: [DONE]\n\n")

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
	c.Set(common.RequestIdKey, "responses-image-billing-test")
	info := &relaycommon.RelayInfo{
		OriginModelName: "gpt-5.1",
		DisablePing:     true,
		ChannelMeta: &relaycommon.ChannelMeta{
			UpstreamModelName: "gpt-5.1",
		},
	}
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(strings.NewReader(body.String())),
		Header:     http.Header{"Content-Type": []string{"text/event-stream"}},
	}

	_, apiErr := OaiResponsesStreamHandler(c, info, resp)
	require.Nil(t, apiErr)
	require.NotNil(t, info.ResponsesUsageInfo)
	require.Contains(t, info.ResponsesUsageInfo.BuiltInTools, dto.BuildInToolImageGeneration)
	return info
}

func TestOaiResponsesStreamHandlerDeduplicatesCompletedImageOutput(t *testing.T) {
	item := `{"type":"image_generation_call","id":"img_1","call_id":"call_1","status":"completed","result":"base64-a"}`
	info := runResponsesImageBillingStream(
		t,
		`{"type":"response.output_item.done","output_index":0,"item":`+item+`}`,
		`{"type":"response.completed","response":{"status":"completed","output":[`+item+`],"usage":{"input_tokens":1,"output_tokens":1,"total_tokens":2}}}`,
	)

	assert.Equal(t, 1, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolImageGeneration].CallCount)
}

func TestOaiResponsesStreamHandlerDiscardsImageOutputOnIncomplete(t *testing.T) {
	info := runResponsesImageBillingStream(
		t,
		`{"type":"response.output_item.done","output_index":0,"item":{"type":"image_generation_call","id":"img_1","status":"completed","result":"base64-a"}}`,
		`{"type":"response.incomplete","response":{"status":"incomplete"}}`,
	)

	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolImageGeneration].CallCount)
}

func TestOaiResponsesStreamHandlerDoesNotCountPartialImageEvent(t *testing.T) {
	info := runResponsesImageBillingStream(
		t,
		`{"type":"response.image_generation_call.partial_image","output_index":0,"partial_image_b64":"partial-bytes"}`,
		`{"type":"response.completed","response":{"status":"completed","output":[]}}`,
	)

	assert.Equal(t, 0, info.ResponsesUsageInfo.BuiltInTools[dto.BuildInToolImageGeneration].CallCount)
}