package voice

import (
	"context"
	"encoding/base64"
	"encoding/hex"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
)

func TestDashscopeSTT(t *testing.T) {
	t.Parallel()
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if !strings.HasSuffix(r.URL.Path, "/generation") {
			t.Errorf("path = %q, want .../generation", r.URL.Path)
		}
		if r.Header.Get("Authorization") != "Bearer sk" {
			t.Errorf("auth = %q, want Bearer sk", r.Header.Get("Authorization"))
		}
		if r.Header.Get("X-DashScope-SSE") != "disable" {
			t.Errorf("sse = %q, want disable", r.Header.Get("X-DashScope-SSE"))
		}
		var body map[string]any
		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
			t.Fatalf("decode: %v", err)
		}
		if body["model"] != "qwen-audio-3.0-asr-flash" {
			t.Errorf("model = %v, want qwen-audio-3.0-asr-flash", body["model"])
		}
		input := body["input"].(map[string]any)
		msgs := input["messages"].([]any)
		content := msgs[0].(map[string]any)["content"].([]any)
		audio := content[0].(map[string]any)["input_audio"].(map[string]any)["data"].(string)
		if !strings.HasPrefix(audio, "data:audio/wav;base64,") {
			t.Errorf("data uri = %q, want data:audio/wav;base64,...", audio)
		}
		params := body["parameters"].(map[string]any)
		if params["format"] != "wav" {
			t.Errorf("format = %v, want wav", params["format"])
		}
		hints := params["language_hints"].([]any)
		if len(hints) != 1 || hints[0] != "zh" {
			t.Errorf("language_hints = %v, want [zh]", hints)
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"output":{"output":{"sentence":{"text":"你好世界"}}}}`))
	}))
	defer srv.Close()

	stt := NewDashscopeSTT(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	text, err := stt.STT(context.Background(), Audio{Format: "wav", Data: []byte("rawaudio")})
	if err != nil {
		t.Fatalf("STT error: %v", err)
	}
	if text != "你好世界" {
		t.Errorf("text = %q, want 你好世界", text)
	}
}

func TestDashscopeSTT_ChoicesText(t *testing.T) {
	t.Parallel()
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"output":{"choices":[{"message":{"content":[{"text":"hello"}]}}]}}`))
	}))
	defer srv.Close()

	stt := NewDashscopeSTT(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	text, err := stt.STT(context.Background(), Audio{Format: "wav", Data: []byte("x")})
	if err != nil {
		t.Fatalf("STT error: %v", err)
	}
	if text != "hello" {
		t.Errorf("text = %q, want hello", text)
	}
}

func TestDashscopeSTT_NotConfigured(t *testing.T) {
	t.Parallel()
	stt := NewDashscopeSTT(config.VoiceConfig{})
	if _, err := stt.STT(context.Background(), Audio{Format: "wav", Data: []byte("x")}); err != ErrNotConfigured {
		t.Fatalf("err = %v, want ErrNotConfigured", err)
	}
}

func TestDashscopeSTT_EmptyAudio(t *testing.T) {
	t.Parallel()
	stt := NewDashscopeSTT(config.VoiceConfig{DashscopeBaseURL: "http://x", DashscopeAPIKey: "sk"})
	if _, err := stt.STT(context.Background(), Audio{}); !errors.Is(err, ErrProviderFailed) {
		t.Fatalf("err = %v, want ErrProviderFailed", err)
	}
}

func TestDashscopeSTT_Non200(t *testing.T) {
	t.Parallel()
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusBadRequest)
		_, _ = w.Write([]byte(`{"code":"InvalidParameter","message":"bad"}`))
	}))
	defer srv.Close()

	stt := NewDashscopeSTT(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	_, err := stt.STT(context.Background(), Audio{Format: "wav", Data: []byte("x")})
	if !errors.Is(err, ErrProviderFailed) {
		t.Fatalf("err = %v, want ErrProviderFailed", err)
	}
	if !strings.Contains(err.Error(), "400") {
		t.Errorf("err = %v, want it to mention status 400", err)
	}
}

// TestDashscopeTTS_Non200DropsSpokenText 覆盖 M41 的 DashScope 一处：TTS 请求的
// input 就是**她要念的那段话**，而 DashScope 的 4xx 错误体会把它（或回显它的
// message）带回来。旧实现把整包响应体（cloudMaxResponseBytes = 8 MiB，无截断）
// 拼进 error，error 又被语音链打日志。
//
// 断言「文本里搜不到台词」，同时保留两类可诊断字段：分类哨兵链与 code /
// request_id（DashScope 报障时确实要看这两个）。
func TestDashscopeTTS_Non200DropsSpokenText(t *testing.T) {
	t.Parallel()
	const spoken = "SENTINEL-SPOKEN-TEXT-1e4f"
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusBadRequest)
		_, _ = w.Write([]byte(`{"code":"InvalidParameter","message":"text: '` + spoken +
			`' is invalid","request_id":"req-0123456789abcdef"}`))
	}))
	defer srv.Close()

	tts := NewDashscopeTTS(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	_, err := tts.TTS(context.Background(), spoken)
	if !errors.Is(err, ErrProviderFailed) {
		t.Fatalf("err = %v, want ErrProviderFailed", err)
	}
	if strings.Contains(err.Error(), spoken) {
		t.Errorf("error text echoes the text to be spoken: %v", err)
	}
	if !strings.Contains(err.Error(), "InvalidParameter") {
		t.Errorf("err = %v, want the error code kept for triage", err)
	}
	if !strings.Contains(err.Error(), "req-0123456789abcdef") {
		t.Errorf("err = %v, want the request id kept for provider support", err)
	}
}

func TestDashscopeTTS_URL(t *testing.T) {
	t.Parallel()
	audioBytes := []byte("RIFFxxxxWAVE")
	var srv *httptest.Server
	srv = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch {
		case strings.HasSuffix(r.URL.Path, "/SpeechSynthesizer"):
			if r.Header.Get("Authorization") != "Bearer sk" {
				t.Errorf("auth = %q, want Bearer sk", r.Header.Get("Authorization"))
			}
			if sse := r.Header.Get("X-DashScope-SSE"); sse != "" {
				t.Errorf("sse = %q, want empty (non-streaming URL)", sse)
			}
			var body map[string]any
			if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
				t.Fatalf("decode: %v", err)
			}
			if body["model"] != "cosyvoice-v3-flash" {
				t.Errorf("model = %v, want cosyvoice-v3-flash", body["model"])
			}
			input := body["input"].(map[string]any)
			if input["text"] != "你好" {
				t.Errorf("text = %v, want 你好", input["text"])
			}
			if input["voice"] != "longxiaochun_v3" {
				t.Errorf("voice = %v, want longxiaochun_v3", input["voice"])
			}
			if input["format"] != "wav" {
				t.Errorf("format = %v, want wav", input["format"])
			}
			w.Header().Set("Content-Type", "application/json")
			_, _ = w.Write([]byte(`{"output":{"audio":{"url":"` + srv.URL + `/audio/out.wav"}}}`))
		case strings.HasSuffix(r.URL.Path, "/audio/out.wav"):
			w.Header().Set("Content-Type", "audio/wav")
			_, _ = w.Write(audioBytes)
		default:
			t.Errorf("unexpected path %q", r.URL.Path)
		}
	}))
	defer srv.Close()

	tts := NewDashscopeTTS(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	audio, err := tts.TTS(context.Background(), "你好")
	if err != nil {
		t.Fatalf("TTS error: %v", err)
	}
	if audio.Format != "wav" {
		t.Errorf("format = %q, want wav", audio.Format)
	}
	if hex.EncodeToString(audio.Data) != hex.EncodeToString(audioBytes) {
		t.Errorf("data = %s, want %s", hex.EncodeToString(audio.Data), hex.EncodeToString(audioBytes))
	}
}

func TestDashscopeTTS_DataBlob(t *testing.T) {
	t.Parallel()
	audioBytes := []byte{9, 8, 7}
	b64 := base64.StdEncoding.EncodeToString(audioBytes)
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"output":{"audio":{"data":"` + b64 + `"}}}`))
	}))
	defer srv.Close()

	tts := NewDashscopeTTS(config.VoiceConfig{DashscopeBaseURL: srv.URL, DashscopeAPIKey: "sk"})
	audio, err := tts.TTS(context.Background(), "hi")
	if err != nil {
		t.Fatalf("TTS error: %v", err)
	}
	if hex.EncodeToString(audio.Data) != hex.EncodeToString(audioBytes) {
		t.Errorf("data = %s, want %s", hex.EncodeToString(audio.Data), hex.EncodeToString(audioBytes))
	}
}

func TestDashscopeTTS_EmptyText(t *testing.T) {
	t.Parallel()
	tts := NewDashscopeTTS(config.VoiceConfig{DashscopeBaseURL: "http://x", DashscopeAPIKey: "sk"})
	if _, err := tts.TTS(context.Background(), "   "); err != ErrEmptyText {
		t.Fatalf("err = %v, want ErrEmptyText", err)
	}
}

func TestDashscopeTTS_NotConfigured(t *testing.T) {
	t.Parallel()
	tts := NewDashscopeTTS(config.VoiceConfig{})
	if _, err := tts.TTS(context.Background(), "hi"); err != ErrNotConfigured {
		t.Fatalf("err = %v, want ErrNotConfigured", err)
	}
}