package internal

import (
	"bufio"
	"context"
	"encoding/json"
	"fmt"
	"net"
	"os/exec"
	"sync"
	"time"

	"github.com/sipeed/picoclaw/pkg/logger"
)

var (
	ttsEnabled   bool
	ttsEnabledMu sync.RWMutex
)

type TTSRequest struct {
	Text   string  `json:"text"`
	Voice  *string `json:"voice,omitempty"`
	Format *string `json:"format,omitempty"`
	Style  *string `json:"style,omitempty"`
}

type TTSResponse struct {
	Status  string `json:"status"`
	Message string `json:"message"`
}

func SetTTSEnabled(enabled bool) {
	ttsEnabledMu.Lock()
	defer ttsEnabledMu.Unlock()
	ttsEnabled = enabled
}

func IsTTSEnabled() bool {
	ttsEnabledMu.RLock()
	defer ttsEnabledMu.RUnlock()
	return ttsEnabled
}

func ToggleTTS() bool {
	ttsEnabledMu.Lock()
	defer ttsEnabledMu.Unlock()
	ttsEnabled = !ttsEnabled
	return ttsEnabled
}

func GetTTSPrompt(basePrompt string) string {
	if IsTTSEnabled() {
		return basePrompt + "🔊 "
	}
	return basePrompt
}

func SpeakText(text string) {
	cfg := GetProjectConfig()
	if !cfg.TTS.Enabled && !IsTTSEnabled() {
		return
	}

	port := cfg.TTS.Port
	if port <= 0 {
		port = 9876
	}

	addr := fmt.Sprintf("127.0.0.1:%d", port)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	err := speakTextWithContext(ctx, text, addr)
	if err != nil {
		logger.WarnCF("tts", "网络语音暂时异常", map[string]any{
			"error": err.Error(),
		})
	}
}

func speakTextWithContext(ctx context.Context, text, addr string) error {
	conn, err := dialWithContext(ctx, addr)
	if err != nil {
		return fmt.Errorf("连接失败: %w", err)
	}
	defer conn.Close()

	reader := bufio.NewReader(conn)

	voiceStr := "mimo_default"
	formatStr := "wav"

	request := TTSRequest{
		Text:   text,
		Voice:  &voiceStr,
		Format: &formatStr,
	}

	requestData, err := json.Marshal(request)
	if err != nil {
		return fmt.Errorf("序列化请求失败: %w", err)
	}

	_, err = conn.Write(append(requestData, '\n'))
	if err != nil {
		return fmt.Errorf("发送请求失败: %w", err)
	}

	responseLine, err := reader.ReadString('\n')
	if err != nil {
		return fmt.Errorf("读取响应失败: %w", err)
	}

	var response TTSResponse
	if err := json.Unmarshal([]byte(responseLine), &response); err != nil {
		return fmt.Errorf("解析响应失败: %w", err)
	}

	if response.Status != "ok" {
		return fmt.Errorf("服务错误: %s", response.Message)
	}

	audioFile := response.Message
	if audioFile == "" {
		return fmt.Errorf("未收到音频文件路径")
	}

	if err := playAudio(audioFile); err != nil {
		return fmt.Errorf("播放失败: %w", err)
	}

	return nil
}

func dialWithContext(ctx context.Context, addr string) (net.Conn, error) {
	d := &net.Dialer{}
	return d.DialContext(ctx, "tcp", addr)
}

func playAudio(filePath string) error {
	cmd := exec.Command("afplay", filePath)
	return cmd.Run()
}