import gradio as gr
from pathlib import Path
from ui.handlers import handle_verify, handle_upload, handle_reset, handle_audio_change

# Đọc CSS và JS từ file thật
# Bỏ @import trong CSS vì Gradio không cho phép
_CSS = (Path(__file__).parent / "styles.css").read_text()
_JS  = (Path(__file__).parent / "recorder.js").read_text()

_RECORDER_HTML = """
<div id="lumi-recorder-ui">
    <button id="lumi-mic-btn" title="Nhấn để ghi âm">🎙️</button>
    <div id="lumi-rec-label">Nhấn để bắt đầu ghi âm</div>
    <canvas id="lumi-canvas" width="520" height="72"></canvas>
    <div id="lumi-proc-bar">
        <div class="plabel"><span class="pdot">●</span>&nbsp;Đang xử lý âm thanh...</div>
        <div class="ptrack"><div class="pfill"></div></div>
    </div>
    <div id="lumi-audio-playback">
        <div class="play-label">🎧 Nghe lại bản ghi:</div>
        <audio id="lumi-audio-el" controls></audio>
    </div>
</div>
"""


def build_ui() -> gr.Blocks:
    with gr.Blocks(theme=gr.themes.Base(), css=_CSS, title="Lumi Voice Collector") as demo:

        # --- Font + permissions (thay thế @import trong CSS) ---
        gr.HTML("""
        <link rel="preconnect" href="https://fonts.googleapis.com">
        <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
        <link href="https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&display=swap" rel="stylesheet">
        <meta http-equiv="Permissions-Policy" content="microphone=*">
        """)

        # --- Header ---
        gr.HTML("""
        <div class="lumi-header">
            <div class="lumi-logo-ring">🎙️</div>
            <h1>Thu thập giọng nói "Lumi ơi"</h1>
            <p>Giúp huấn luyện wake word cho trợ lý Lumi</p>
        </div>
        """)

        # --- Steps ---
        gr.HTML("""
        <div class="lumi-steps">
            <div class="lumi-step">
                <div class="lumi-step-num">1</div>
                <div class="lumi-step-lbl">Ghi âm</div>
            </div>
            <div class="lumi-step-line"></div>
            <div class="lumi-step">
                <div class="lumi-step-num">2</div>
                <div class="lumi-step-lbl">Kiểm tra</div>
            </div>
            <div class="lumi-step-line"></div>
            <div class="lumi-step">
                <div class="lumi-step-num">3</div>
                <div class="lumi-step-lbl">Gửi lên</div>
            </div>
        </div>
        """)

        # --- Instruction ---
        gr.HTML("""
        <div class="lumi-instruction">
            <div class="ititle">📋 Hướng dẫn</div>
            <p>
                <span class="hi">1.</span> Nhấn nút mic để bắt đầu ghi âm<br>
                <span class="hi">2.</span> Nói rõ <span class="hw">"Lumi ơi"</span> vào micro<br>
                <span class="hi">3.</span> Nhấn lại để dừng — đợi thanh xử lý biến mất<br>
                <span class="hi">4.</span> Nhấn <b>Kiểm tra</b> → đạt ≥ 0.8 → nhấn <b>Gửi</b>
            </p>
        </div>
        """)

        # --- Recorder card ---
        with gr.Group(elem_classes="lumi-card"):
            gr.HTML(_RECORDER_HTML)
            gr.HTML(f"<script>{_JS}</script>")

        # --- Hidden Gradio audio ---
        with gr.Group(elem_classes="hidden-audio-wrap"):
            audio_inst = gr.Audio(
                sources=["upload"],
                type="filepath",
                label="hidden",
                visible=False
            )

        # --- Status ---
        status_txt = gr.Label(
            value='🎙️ Sẵn sàng — Nhấn mic và đọc "Lumi ơi"',
            elem_classes="lumi-status",
            show_label=False
        )

        # --- Buttons ---
        with gr.Row(elem_classes="lumi-btn-row"):
            btn_check = gr.Button("🔍  Kiểm tra mẫu", variant="secondary", elem_classes="lb-check")
            btn_reset = gr.Button("🗑  Ghi lại",       variant="stop",      elem_classes="lb-reset")

        btn_send = gr.Button(
            "🚀  Gửi lên hệ thống",
            variant="primary",
            interactive=False,
            elem_classes="lb-send"
        )

        # --- State ---
        score_state = gr.State(0.0)

        # --- Event bindings ---
        btn_check.click(
            fn=handle_verify,
            inputs=audio_inst,
            outputs=[status_txt, btn_send, score_state]
        )
        btn_send.click(
            fn=handle_upload,
            inputs=[audio_inst, score_state],
            outputs=[status_txt, btn_send, audio_inst]
        )
        btn_reset.click(
            fn=handle_reset,
            outputs=[audio_inst, status_txt, btn_send, score_state]
        )
        audio_inst.change(
            fn=handle_audio_change,
            outputs=btn_send
        )

    return demo