import gradio as gr
import numpy as np

from ipa import g2p
from ipa.ipa import text_to_ipa
from models import models_config


def _do_tts(model_id, ipa, language_name, speaker_name=None, speaker_wav=None):
    model = models_config[model_id]["model"]
    if speaker_wav is not None:
        return model.tts(
            ipa,
            speaker_wav=speaker_wav,
            language_name=language_name,
            split_sentences=False,
        )
    return model.tts(
        ipa,
        speaker_name=speaker_name,
        language_name=language_name,
        split_sentences=False,
    )


def text_to_speech(
    model_id: str,
    use_default_emb_or_custom: str,
    speaker_wav,
    speaker: str,
    language: str,
    dialect: str,
    speed: float,
    text: str,
):
    if len(text) == 0:
        raise gr.Error("請勿輸入空字串。")
    tag = language
    if language not in g2p:
        tag = f"{language}_{dialect}"

    ipa = text_to_ipa(text, tag, g2p)

    models_config[model_id]["model"].tts_model.length_scale = speed
    if use_default_emb_or_custom == "預設語者":
        wav = _do_tts(
            model_id,
            ipa,
            speaker_name=speaker
            if len(models_config[model_id]["speaker_mapping"]) > 1
            else None,
            language_name=language,
        )
    else:
        wav = _do_tts(
            model_id,
            ipa,
            speaker_wav=speaker_wav,
            language_name=language,
        )

    return (
        models_config[model_id]["model"].tts_model.config.audio.sample_rate,
        np.array(wav),
    )


def when_model_selected(model_id):
    model_config = models_config[model_id]

    speaker_drop_down_choices = [
        (k, v) for k, v in model_config["speaker_mapping"].items()
    ]

    language_radio_choices = [
        (k, v) for k, v in model_config["language_mapping"].items()
    ]

    use_default_emb_or_ref_radio_visible = False
    if model_config["model"].tts_model.config.model_args.speaker_encoder_model_path:
        use_default_emb_or_ref_radio_visible = True

    return (
        gr.update(
            choices=speaker_drop_down_choices,
            value=speaker_drop_down_choices[0][1]
            if len(speaker_drop_down_choices) > 0
            else None,
            interactive=len(speaker_drop_down_choices) > 1,
        ),
        gr.update(
            choices=language_radio_choices,
            value=language_radio_choices[0][1],
            interactive=len(language_radio_choices) > 1,
        ),
        gr.update(visible=use_default_emb_or_ref_radio_visible, value="預設語者"),
    )


def use_default_emb_or_custom_radio_input(use_default_emb_or_custom):
    if use_default_emb_or_custom == "客製化語者":
        return gr.update(visible=True), gr.update(visible=False)
    return gr.update(visible=False), gr.update(visible=True)


def language_radio_changed(language):
    if language in g2p:
        return gr.update(visible=False)
    dialect_choices = [tag.split("_")[1] for tag in g2p.keys() if language in tag]
    return gr.update(
        choices=dialect_choices,
        value=dialect_choices[0],
        interactive=len(dialect_choices) > 1,
    )


demo = gr.Blocks(
    title="臺灣南島語語音合成系統",
    css="@import url(https://tauhu.tw/tauhu-oo.css);",
    theme=gr.themes.Default(
        font=(
            "tauhu-oo",
            gr.themes.GoogleFont("Source Sans Pro"),
            "ui-sans-serif",
            "system-ui",
            "sans-serif",
        )
    ),
)

with demo:
    default_model_id = list(models_config.keys())[0]
    model_drop_down = gr.Dropdown(
        models_config.keys(),
        value=default_model_id,
        label="模型",
    )
    use_default_emb_or_custom_radio = gr.Radio(
        label="語者類型",
        choices=["預設語者", "客製化語者"],
        value="客製化語者",
        visible=True,
        show_label=False,
    )
    speaker_wav = gr.Audio(
        label="客製化語音",
        visible=True,
        editable=False,
        type="filepath",
        waveform_options=gr.WaveformOptions(
            show_controls=False,
            sample_rate=16000,
        ),
    )
    speaker_drop_down = gr.Dropdown(
        choices=[
            (k, v)
            for k, v in models_config[default_model_id]["speaker_mapping"].items()
        ],
        value=list(models_config[default_model_id]["speaker_mapping"].values())[0],
        label="語者",
        interactive=len(models_config[default_model_id]["speaker_mapping"]) > 1,
        visible=False,
    )
    use_default_emb_or_custom_radio.change(
        use_default_emb_or_custom_radio_input,
        inputs=[use_default_emb_or_custom_radio],
        outputs=[speaker_wav, speaker_drop_down],
    )

    default_language = list(
        models_config[default_model_id]["language_mapping"].values()
    )[0]
    language_radio = gr.Radio(
        choices=[
            (k, v)
            for k, v in models_config[default_model_id]["language_mapping"].items()
        ],
        value=default_language,
        label="語言",
        interactive=len(models_config[default_model_id]["language_mapping"]) > 1,
    )

    default_dialect_choices = [
        tag.split("_")[1] for tag in g2p.keys() if default_language in tag
    ]
    dialect_radio = gr.Radio(
        choices=default_dialect_choices,
        value=default_dialect_choices[0],
        label="方言",
        interactive=len(default_dialect_choices) > 1,
    )

    language_radio.change(
        language_radio_changed, inputs=[language_radio], outputs=[dialect_radio]
    )

    model_drop_down.input(
        when_model_selected,
        inputs=[model_drop_down],
        outputs=[speaker_drop_down, language_radio, use_default_emb_or_custom_radio],
    )

    input_text = gr.Textbox(
        label="輸入文字",
        value="",
    )

    speed = gr.Slider(maximum=1.5, minimum=0.5, value=1, label="語速")

    with open("DEMO.md") as tong:
        gr.Markdown(tong.read())
    gr.Interface(
        text_to_speech,
        inputs=[
            model_drop_down,
            use_default_emb_or_custom_radio,
            speaker_wav,
            speaker_drop_down,
            language_radio,
            dialect_radio,
            speed,
            input_text,
        ],
        outputs=[
            gr.Audio(interactive=False, label="合成語音", show_download_button=True),
        ],
        allow_flagging="auto",
    )
    gr.Examples(
        [
            [
                "預設語者",
                "formosan_dict_ami#wav/formosan_dict_ami/000002_2.31-6.09.wav",
                "阿美",
                "南勢",
                "mikadavu ku vavainay, i vavahiyan, a luma’",
            ],
            [
                "預設語者",
                "formosan_dict_ami#wav/formosan_dict_ami/000035_0.00-3.69.wav",
                "阿美",
                "南勢",
                "mikadavu ku vavainay, i vavahiyan, a luma’",
            ],
        ],
        label="範例",
        inputs=[
            use_default_emb_or_custom_radio,
            speaker_drop_down,
            language_radio,
            dialect_radio,
            input_text,
        ],
    )

demo.launch()