"""Two-pane brutalist layout: 4-step stepper + tabbed results dock."""

import pandas as pd
import gradio as gr


LANGUAGES = [
    ("Auto-detect", None), ("English", "en"), ("Japanese", "ja"), ("Chinese", "zh"),
    ("Spanish", "es"), ("French", "fr"), ("German", "de"), ("Korean", "ko"),
    ("Portuguese", "pt"), ("Russian", "ru"), ("Italian", "it"), ("Vietnamese", "vi"),
    ("Arabic", "ar"), ("Hindi", "hi"), ("Indonesian", "id"), ("Dutch", "nl"),
    ("Polish", "pl"), ("Turkish", "tr"), ("Thai", "th"), ("Ukrainian", "uk"),
]

EXAMPLE_URLS = [
    "https://www.youtube.com/watch?v=j7BfEzAFuYc&t=32s",
    "https://www.youtube.com/watch?v=-UX0X45sYe4",
    "https://www.youtube.com/watch?v=7minSgqi-Gw",
]


def _step_header(num: str, title: str) -> gr.HTML:
    return gr.HTML(
        f'<div class="brut-step-header">'
        f'<span class="brut-step-num">{num}</span>'
        f'<h3 class="brut-step-title">{title}</h3>'
        f'</div>'
    )


def build_stepper(languages=LANGUAGES, example_urls=EXAMPLE_URLS) -> dict:
    """4-card stepper: Source / Configure / Process / Review. Returns named handles."""
    handles: dict = {}

    # Step 1 — Source
    with gr.Group(elem_classes=["brut-step-card", "step-1"]):
        _step_header("01", "SOURCE")
        handles["yt_url"] = gr.Textbox(label="YouTube URL", lines=1, placeholder="https://www.youtube.com/watch?v=...")
        handles["video_in"] = gr.Video(label="Video / Audio file")
        gr.Examples(examples=example_urls, inputs=[handles["yt_url"]], label="YouTube examples")
        with gr.Accordion("Advanced YouTube download", open=False):
            handles["yt_btn"] = gr.Button("Download YouTube video")
            handles["yt_status"] = gr.Markdown()

    # Step 2 — Configure
    with gr.Group(elem_classes=["brut-step-card", "step-2"]):
        _step_header("02", "CONFIGURE")
        handles["language"] = gr.Dropdown(
            choices=languages, value=None,
            label="Spoken language (auto-detect if blank)",
        )
        handles["num_speakers"] = gr.Number(
            value=0, precision=0,
            label="Number of speakers (0 = auto-detect via pyannote)",
        )

    # Step 3 — Process
    with gr.Group(elem_classes=["brut-step-card", "step-3"]):
        _step_header("03", "PROCESS")
        handles["run_btn"] = gr.Button("PROCESS", variant="primary", elem_classes="brut-primary")
        gr.HTML('<small style="font-family: var(--brut-font-mono); font-size: 12px;">Downloads YouTube URL or processes uploaded file.</small>')

    # Step 4 — Review
    with gr.Group(elem_classes=["brut-step-card", "step-4"]):
        _step_header("04", "REVIEW")
        handles["progress_log"] = gr.Markdown(value="", elem_classes="brut-log")
        handles["error_card"] = gr.Markdown(value="", elem_classes="brut-error-card")

    return handles


def build_results_dock() -> dict:
    """Tabbed results dock: Transcript / Audio / Downloads / Diagnostics."""
    handles: dict = {}

    with gr.Tabs(elem_classes="brut-tabs"):
        with gr.TabItem("Transcript"):
            handles["df_out"] = gr.DataFrame(
                label="Transcript",
                value=pd.DataFrame(columns=["Start", "End", "Speaker", "Text"]),
                show_label=True,
                row_count=(0, "dynamic"),
                wrap=True,
                elem_classes="brut-df",
                interactive=False,
            )
            with gr.Row():
                handles["edit_btn"] = gr.Button("EDIT SPEAKERS")
                handles["apply_btn"] = gr.Button("APPLY RENAMES", variant="primary", visible=False)
                handles["cancel_btn"] = gr.Button("CANCEL", visible=False)

        with gr.TabItem("Audio"):
            handles["audio_player"] = gr.Audio(
                label="Converted WAV (16kHz mono)",
                interactive=False,
                show_download_button=True,
                elem_id="brut-audio-mount",
                elem_classes="brut-audio-player",
                value=None,
            )
            handles["seek_bus"] = gr.HTML(value="", elem_id="brut-seek-bus")

        with gr.TabItem("Downloads"):
            handles["csv_out"] = gr.File(label="Download CSV")
            handles["srt_out"] = gr.File(label="Download SRT")

        with gr.TabItem("Diagnostics"):
            handles["sysinfo"] = gr.Markdown()

    handles["merged_state"] = gr.State(value=None)
    handles["edit_mode_state"] = gr.State(value=False)
    handles["wav_state"] = gr.State(value=None)

    return handles