package com.emotion.service;

public interface TtsEngineClient {

    TtsEngineResult synthesize(String text, String voice, String outputPath, SynthesisOptions options);

    class SynthesisOptions {
        private final Double speechRate;
        private final Double pitch;
        private final String emotion;

        public SynthesisOptions(Double speechRate, Double pitch, String emotion) {
            this.speechRate = speechRate;
            this.pitch = pitch;
            this.emotion = emotion;
        }

        public Double getSpeechRate() {
            return speechRate;
        }

        public Double getPitch() {
            return pitch;
        }

        public String getEmotion() {
            return emotion;
        }

        public String cacheKey() {
            return "rate=" + (speechRate == null ? "" : speechRate)
                    + ";pitch=" + (pitch == null ? "" : pitch)
                    + ";emotion=" + (emotion == null ? "" : emotion);
        }
    }

    class TtsEngineResult {
        private final boolean success;
        private final String audioPath;
        private final Long durationMs;
        private final String errorMessage;

        public TtsEngineResult(boolean success, String audioPath, Long durationMs, String errorMessage) {
            this.success = success;
            this.audioPath = audioPath;
            this.durationMs = durationMs;
            this.errorMessage = errorMessage;
        }

        public boolean isSuccess() {
            return success;
        }

        public String getAudioPath() {
            return audioPath;
        }

        public Long getDurationMs() {
            return durationMs;
        }

        public String getErrorMessage() {
            return errorMessage;
        }
    }
}