package chinamobile_seedance

import (
	"errors"
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"github.com/QuantumNous/new-api/common"
	"github.com/QuantumNous/new-api/constant"
	"github.com/QuantumNous/new-api/model"
	relaycommon "github.com/QuantumNous/new-api/relay/common"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/require"
)

func TestRunSDKCallRecoversPanic(t *testing.T) {
	_, err := runSDKCall[string](time.Second, func() (string, error) {
		panic("attestation failed")
	})
	require.Error(t, err)
	require.Contains(t, err.Error(), "upstream_sdk_panic")
}

func TestRunSDKCallTimesOut(t *testing.T) {
	start := time.Now()
	_, err := runSDKCall[string](20*time.Millisecond, func() (string, error) {
		time.Sleep(200 * time.Millisecond)
		return "late", nil
	})
	require.Error(t, err)
	require.Contains(t, err.Error(), "upstream_timeout")
	require.Less(t, time.Since(start), 150*time.Millisecond)
}

func TestRunSDKCallTimeoutDoesNotPermanentlyOccupySemaphore(t *testing.T) {
	original := sdkSemaphore
	sdkSemaphore = make(chan struct{}, 1)
	t.Cleanup(func() {
		sdkSemaphore = original
	})

	block := make(chan struct{})
	_, err := runSDKCall[string](20*time.Millisecond, func() (string, error) {
		<-block
		return "late", nil
	})
	require.ErrorContains(t, err, "upstream_timeout")

	_, err = runSDKCall[string](time.Second, func() (string, error) {
		return "ok", nil
	})
	require.NoError(t, err)

	close(block)
}

func TestRunSDKCallReturnsError(t *testing.T) {
	_, err := runSDKCall[string](time.Second, func() (string, error) {
		return "", errors.New("upstream rejected")
	})
	require.ErrorContains(t, err, "upstream rejected")
}

type fakeSDK struct {
	createInput map[string]interface{}
	createID    string
	queryTaskID string
	queryResult map[string]interface{}
	err         error
}

func (f *fakeSDK) CreateVideoGenerationTask(data map[string]interface{}) (string, error) {
	f.createInput = data
	if f.err != nil {
		return "", f.err
	}
	return f.createID, nil
}

func (f *fakeSDK) QueryVideoGenerationTask(taskID string) (map[string]interface{}, error) {
	f.queryTaskID = taskID
	if f.err != nil {
		return nil, f.err
	}
	return f.queryResult, nil
}

func TestBuildRequestBodyNormalizesContentToInterfaceSlice(t *testing.T) {
	adaptor := &TaskAdaptor{}
	adaptor.Init(&relaycommon.RelayInfo{
		ChannelMeta: &relaycommon.ChannelMeta{ChannelType: constant.ChannelTypeChinaMobileSeedance},
	})
	c := newTaskRequestContext(t, `{
		"model":"doubao-seedance-2.0",
		"prompt":"current prompt",
		"metadata":{
			"content":[
				{"type":"video_url","video_url":{"url":"https://example.test/input.mp4"},"role":"reference_video"}
			],
			"duration":5
		}
	}`)
	info := &relaycommon.RelayInfo{
		ChannelMeta: &relaycommon.ChannelMeta{UpstreamModelName: "doubao-seedance-2.0"},
	}

	body, err := adaptor.BuildRequestBody(c, info)
	require.NoError(t, err)
	data, err := io.ReadAll(body)
	require.NoError(t, err)

	var payload map[string]interface{}
	require.NoError(t, common.Unmarshal(data, &payload))
	content, ok := payload["content"].([]interface{})
	require.True(t, ok)
	require.Len(t, content, 2)
	require.Equal(t, "video_url", content[0].(map[string]interface{})["type"])
	require.Equal(t, "text", content[1].(map[string]interface{})["type"])
	require.Equal(t, "current prompt", content[1].(map[string]interface{})["text"])
	require.Equal(t, float64(5), payload["duration"])
}

func TestDoRequestCallsSDKAndReturnsSyntheticResponse(t *testing.T) {
	fake := &fakeSDK{createID: "upstream-task-1"}
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			require.Equal(t, "https://cm.example.com/api/v3", baseURL)
			require.Equal(t, "sk-test", apiKey)
			require.Equal(t, "doubao-seedance-2.0", model)
			return fake, nil
		},
	}
	adaptor.Init(&relaycommon.RelayInfo{
		ChannelMeta: &relaycommon.ChannelMeta{
			ChannelType:    constant.ChannelTypeChinaMobileSeedance,
			ChannelBaseUrl: "https://cm.example.com/api/v3",
			ApiKey:         "sk-test",
		},
		OriginModelName: "doubao-seedance-2.0",
	})
	payload := strings.NewReader(`{"model":"doubao-seedance-2.0","content":[{"type":"text","text":"hello"}]}`)

	resp, err := adaptor.DoRequest(&gin.Context{}, &relaycommon.RelayInfo{
		ChannelMeta: &relaycommon.ChannelMeta{
			ChannelType:    constant.ChannelTypeChinaMobileSeedance,
			ChannelBaseUrl: "https://cm.example.com/api/v3",
			ApiKey:         "sk-test",
		},
		OriginModelName: "doubao-seedance-2.0",
	}, payload)

	require.NoError(t, err)
	require.Equal(t, http.StatusOK, resp.StatusCode)
	data, err := io.ReadAll(resp.Body)
	require.NoError(t, err)
	require.JSONEq(t, `{"id":"upstream-task-1"}`, string(data))
	require.Equal(t, "doubao-seedance-2.0", fake.createInput["model"])
}

func TestDoRequestMapsOfficialSeedanceModelToChinaMobileDefault(t *testing.T) {
	fake := &fakeSDK{createID: "upstream-task-1"}
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			require.Equal(t, "doubao-seedance-2.0", model)
			return fake, nil
		},
	}
	payload := strings.NewReader(`{"model":"doubao-seedance-2-0-260128","content":[{"type":"text","text":"hello"}]}`)

	resp, err := adaptor.DoRequest(&gin.Context{}, &relaycommon.RelayInfo{
		ChannelMeta:     &relaycommon.ChannelMeta{ChannelType: constant.ChannelTypeChinaMobileSeedance},
		OriginModelName: "doubao-seedance-2-0-260128",
	}, payload)

	require.NoError(t, err)
	require.Equal(t, http.StatusOK, resp.StatusCode)
	require.Equal(t, "doubao-seedance-2.0", fake.createInput["model"])
}

func TestDoRequestMapsPermissionErrorToForbiddenResponse(t *testing.T) {
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			return &fakeSDK{err: errors.New(`Failed to create video generation task: {"ErrorCode":"PERMISSION_ERROR","ErrorMessage":"Endpoint is not authorized"}`)}, nil
		},
	}
	payload := strings.NewReader(`{"model":"doubao-seedance-2.0","content":[{"type":"text","text":"hello"}]}`)

	resp, err := adaptor.DoRequest(&gin.Context{}, &relaycommon.RelayInfo{
		ChannelMeta:     &relaycommon.ChannelMeta{ChannelType: constant.ChannelTypeChinaMobileSeedance},
		OriginModelName: "doubao-seedance-2.0",
	}, payload)

	require.NoError(t, err)
	require.Equal(t, http.StatusForbidden, resp.StatusCode)
	data, err := io.ReadAll(resp.Body)
	require.NoError(t, err)
	require.Contains(t, string(data), "PERMISSION_ERROR")
	require.Contains(t, string(data), "Endpoint is not authorized")
}

func TestDoRequestMapsSensitiveContentErrorToBadRequestResponse(t *testing.T) {
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			return &fakeSDK{err: errors.New(`Failed to create video generation task: {"ErrorCode":"InputVideoSensitiveContentDetected.PrivacyInformation","ErrorMessage":"input video may contain real person"}`)}, nil
		},
	}
	payload := strings.NewReader(`{"model":"doubao-seedance-2.0","content":[{"type":"text","text":"hello"}]}`)

	resp, err := adaptor.DoRequest(&gin.Context{}, &relaycommon.RelayInfo{
		ChannelMeta:     &relaycommon.ChannelMeta{ChannelType: constant.ChannelTypeChinaMobileSeedance},
		OriginModelName: "doubao-seedance-2.0",
	}, payload)

	require.NoError(t, err)
	require.Equal(t, http.StatusBadRequest, resp.StatusCode)
	data, err := io.ReadAll(resp.Body)
	require.NoError(t, err)
	require.Contains(t, string(data), "InputVideoSensitiveContentDetected.PrivacyInformation")
}

func TestFetchTaskCallsSDKAndReturnsQueryMap(t *testing.T) {
	fake := &fakeSDK{queryResult: map[string]interface{}{
		"id":     "upstream-task-1",
		"status": "succeeded",
		"content": map[string]interface{}{
			"video_url": "https://example.test/video.mp4",
		},
	}}
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			require.Equal(t, "https://cm.example.com/api/v3", baseURL)
			require.Equal(t, "sk-test", apiKey)
			require.Equal(t, "doubao-seedance-2.0", model)
			return fake, nil
		},
	}
	adaptor.Init(&relaycommon.RelayInfo{ChannelMeta: &relaycommon.ChannelMeta{ChannelType: constant.ChannelTypeChinaMobileSeedance}})

	resp, err := adaptor.FetchTask("https://cm.example.com/api/v3", "sk-test", map[string]any{
		"task_id": "upstream-task-1",
		"model":   "doubao-seedance-2.0",
	}, "")

	require.NoError(t, err)
	require.Equal(t, "upstream-task-1", fake.queryTaskID)
	data, err := io.ReadAll(resp.Body)
	require.NoError(t, err)
	require.Contains(t, string(data), `"video_url":"https://example.test/video.mp4"`)
}

func TestFetchTaskWithoutInitUsesDefaultTimeout(t *testing.T) {
	fake := &fakeSDK{queryResult: map[string]interface{}{
		"id":     "upstream-task-1",
		"status": "queued",
	}}
	adaptor := &TaskAdaptor{
		newSDK: func(baseURL, apiKey, model string) (seedanceSDK, error) {
			return fake, nil
		},
	}

	resp, err := adaptor.FetchTask("https://cm.example.com/api/v3", "sk-test", map[string]any{
		"task_id": "upstream-task-1",
		"model":   "doubao-seedance-2.0",
	}, "")

	require.NoError(t, err)
	require.Equal(t, http.StatusOK, resp.StatusCode)
}

func TestDoResponseKeepsUpstreamIDWhenPublicTaskIDMissing(t *testing.T) {
	adaptor := &TaskAdaptor{}
	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	resp := &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(strings.NewReader(`{"id":"upstream-task-1"}`)),
	}

	upstreamID, _, taskErr := adaptor.DoResponse(c, resp, &relaycommon.RelayInfo{
		OriginModelName: "doubao-seedance-2.0",
		TaskRelayInfo:   &relaycommon.TaskRelayInfo{},
	})

	require.Nil(t, taskErr)
	require.Equal(t, "upstream-task-1", upstreamID)
	require.Contains(t, w.Body.String(), `"id":"upstream-task-1"`)
}

func TestParseTaskResultSuccessWithVideoURLAndUsage(t *testing.T) {
	taskInfo, err := (&TaskAdaptor{}).ParseTaskResult([]byte(`{
		"id":"cm-task",
		"status":"succeeded",
		"content":{"video_url":"https://example.com/video.mp4"},
		"usage":{"completion_tokens":12,"total_tokens":34}
	}`))
	require.NoError(t, err)
	require.Equal(t, model.TaskStatusSuccess, taskInfo.Status)
	require.Equal(t, "https://example.com/video.mp4", taskInfo.Url)
	require.Equal(t, 12, taskInfo.CompletionTokens)
	require.Equal(t, 34, taskInfo.TotalTokens)
}

func TestParseTaskResultSuccessWithoutUsage(t *testing.T) {
	taskInfo, err := (&TaskAdaptor{}).ParseTaskResult([]byte(`{
		"id":"cm-task",
		"status":"success",
		"content":{"video_url":"https://example.com/video.mp4"}
	}`))
	require.NoError(t, err)
	require.Equal(t, model.TaskStatusSuccess, taskInfo.Status)
	require.Equal(t, 0, taskInfo.CompletionTokens)
	require.Equal(t, 0, taskInfo.TotalTokens)
}

func TestParseTaskResultFailureFromErrorMap(t *testing.T) {
	taskInfo, err := (&TaskAdaptor{}).ParseTaskResult([]byte(`{
		"error":{"code":"bad_request","message":"invalid content"}
	}`))
	require.NoError(t, err)
	require.Equal(t, model.TaskStatusFailure, taskInfo.Status)
	require.Equal(t, "invalid content", taskInfo.Reason)
}

func TestParseTaskResultFailureFromErrorString(t *testing.T) {
	taskInfo, err := (&TaskAdaptor{}).ParseTaskResult([]byte(`{
		"status":"failed",
		"error":"quota exceeded"
	}`))
	require.NoError(t, err)
	require.Equal(t, model.TaskStatusFailure, taskInfo.Status)
	require.Equal(t, "quota exceeded", taskInfo.Reason)
}

func newTaskRequestContext(t *testing.T, body string) *gin.Context {
	t.Helper()
	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Request = httptest.NewRequest(http.MethodPost, "/api/v3/contents/generations/tasks", strings.NewReader(body))
	c.Request.Header.Set("Content-Type", "application/json")
	var req relaycommon.TaskSubmitReq
	require.NoError(t, common.Unmarshal([]byte(body), &req))
	relaycommon.StoreTaskRequest(c, &relaycommon.RelayInfo{}, constant.TaskActionGenerate, req)
	return c
}