package nexara

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestTranscribeFileSuccess(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			t.Fatalf("method: got %s", r.Method)
		}
		if !strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data") {
			t.Fatalf("content-type: got %s", r.Header.Get("Content-Type"))
		}
		if auth := r.Header.Get("Authorization"); auth != "Bearer nexara-key" {
			t.Fatalf("auth: got %q", auth)
		}
		if err := r.ParseMultipartForm(1 << 20); err != nil {
			t.Fatal(err)
		}
		if r.FormValue("model") != "whisper-1" {
			t.Fatalf("model: got %q", r.FormValue("model"))
		}
		if r.FormValue("response_format") != "json" {
			t.Fatalf("response_format: got %q", r.FormValue("response_format"))
		}
		file, _, err := r.FormFile("file")
		if err != nil {
			t.Fatal(err)
		}
		defer file.Close()
		buf := make([]byte, 64)
		n, _ := file.Read(buf)
		if string(buf[:n]) != "audio-bytes" {
			t.Fatalf("file content: got %q", string(buf[:n]))
		}

		_ = json.NewEncoder(w).Encode(map[string]any{
			"text":     "привет мир",
			"language": "ru",
			"segments": []map[string]any{
				{"start": 0.0, "end": 1.5, "text": "привет"},
				{"start": 1.5, "end": 3.0, "text": "мир"},
			},
		})
	}))
	defer srv.Close()

	dir := t.TempDir()
	audioPath := filepath.Join(dir, "test.wav")
	if err := os.WriteFile(audioPath, []byte("audio-bytes"), 0o644); err != nil {
		t.Fatal(err)
	}

	client := New(srv.URL, "nexara-key", "whisper-1", 5*time.Second)
	text, lang, segments, err := client.TranscribeFile(context.Background(), audioPath)
	if err != nil {
		t.Fatal(err)
	}
	if text != "привет мир" {
		t.Fatalf("text: got %q", text)
	}
	if lang != "ru" {
		t.Fatalf("language: got %q", lang)
	}
	if len(segments) != 2 {
		t.Fatalf("segments: got %d", len(segments))
	}
	if segments[0].Text != "привет" || segments[1].End != 3.0 {
		t.Fatalf("unexpected segments: %+v", segments)
	}
}

func TestTranscribeFileAPIError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusUnauthorized)
		_, _ = w.Write([]byte("invalid key"))
	}))
	defer srv.Close()

	dir := t.TempDir()
	audioPath := filepath.Join(dir, "test.wav")
	if err := os.WriteFile(audioPath, []byte("x"), 0o644); err != nil {
		t.Fatal(err)
	}

	client := New(srv.URL, "bad", "", 5*time.Second)
	_, _, _, err := client.TranscribeFile(context.Background(), audioPath)
	if err == nil {
		t.Fatal("expected error on 401")
	}
	if !strings.Contains(err.Error(), "401") {
		t.Fatalf("error should mention status: %v", err)
	}
}

func TestTranscribeFileMissingFile(t *testing.T) {
	client := New("http://localhost", "key", "", time.Second)
	_, _, _, err := client.TranscribeFile(context.Background(), filepath.Join(t.TempDir(), "missing.wav"))
	if err == nil {
		t.Fatal("expected error for missing file")
	}
}

func TestNewTrimsBaseURL(t *testing.T) {
	c := New("https://api.example.com/", "k", "m", time.Second)
	if !strings.HasSuffix(c.apiURL, "/api/v1/audio/transcriptions") {
		t.Fatalf("apiURL: got %s", c.apiURL)
	}
}