from __future__ import annotations

from nicegui import ui

from app.components import GreeksTable
from app.pages.common import dashboard_page, option_chain, strategy_catalog


@ui.page("/options")
def options_page() -> None:
    chain = option_chain()
    expiries = sorted({row["expiry"] for row in chain})
    strike_values = sorted({row["strike"] for row in chain})
    selected_expiry = {"value": expiries[0]}
    strike_range = {"min": strike_values[0], "max": strike_values[-1]}
    selected_strategy = {"value": strategy_catalog()[0]["label"]}
    chosen_contracts: list[dict] = []

    with dashboard_page(
        "Options Chain",
        "Browse GLD contracts, filter by expiry and strike range, inspect Greeks, and attach contracts to hedge workflows.",
        "options",
    ):
        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
            with ui.card().classes("w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"):
                ui.label("Filters").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                expiry_select = ui.select(expiries, value=selected_expiry["value"], label="Expiry").classes("w-full")
                min_strike = ui.number("Min strike", value=strike_range["min"], min=strike_values[0], max=strike_values[-1], step=5).classes("w-full")
                max_strike = ui.number("Max strike", value=strike_range["max"], min=strike_values[0], max=strike_values[-1], step=5).classes("w-full")
                strategy_select = ui.select([item["label"] for item in strategy_catalog()], value=selected_strategy["value"], label="Add to hedge strategy").classes("w-full")

            selection_card = ui.card().classes("w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900")

        chain_table = ui.html("").classes("w-full")
        greeks = GreeksTable([])

        def filtered_rows() -> list[dict]:
            return [
                row
                for row in chain
                if row["expiry"] == selected_expiry["value"] and strike_range["min"] <= row["strike"] <= strike_range["max"]
            ]

        def render_selection() -> None:
            selection_card.clear()
            with selection_card:
                ui.label("Strategy Integration").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                ui.label(f"Target strategy: {selected_strategy['value']}").classes("text-sm text-slate-500 dark:text-slate-400")
                if not chosen_contracts:
                    ui.label("No contracts added yet.").classes("text-sm text-slate-500 dark:text-slate-400")
                    return
                for contract in chosen_contracts[-3:]:
                    ui.label(
                        f"{contract['symbol']} · premium ${contract['premium']:.2f} · Δ {contract['delta']:+.3f}"
                    ).classes("text-sm text-slate-600 dark:text-slate-300")

        def add_to_strategy(contract: dict) -> None:
            chosen_contracts.append(contract)
            render_selection()
            greeks.set_options(chosen_contracts[-6:])
            ui.notify(f"Added {contract['symbol']} to {selected_strategy['value']}", color="positive")

        def render_chain() -> None:
            rows = filtered_rows()
            chain_table.content = """
            <div class='overflow-x-auto rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900'>
                <table class='min-w-full'>
                    <thead class='bg-slate-100 dark:bg-slate-800'>
                        <tr>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Contract</th>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Type</th>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Strike</th>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Bid / Ask</th>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Greeks</th>
                            <th class='px-4 py-3 text-left text-xs font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-300'>Action</th>
                        </tr>
                    </thead>
                    <tbody>
            """ + "".join(
                f"""
                        <tr class='border-b border-slate-200 dark:border-slate-800'>
                            <td class='px-4 py-3 font-medium text-slate-900 dark:text-slate-100'>{row['symbol']}</td>
                            <td class='px-4 py-3 text-slate-600 dark:text-slate-300'>{row['type'].upper()}</td>
                            <td class='px-4 py-3 text-slate-600 dark:text-slate-300'>${row['strike']:.2f}</td>
                            <td class='px-4 py-3 text-slate-600 dark:text-slate-300'>${row['bid']:.2f} / ${row['ask']:.2f}</td>
                            <td class='px-4 py-3 text-slate-600 dark:text-slate-300'>Δ {row['delta']:+.3f} · Γ {row['gamma']:.3f} · Θ {row['theta']:+.3f}</td>
                            <td class='px-4 py-3 text-sky-600 dark:text-sky-300'>Use quick-add buttons below</td>
                        </tr>
                """
                for row in rows
            ) + ("" if rows else "<tr><td colspan='6' class='px-4 py-6 text-center text-slate-500 dark:text-slate-400'>No contracts match the current filter.</td></tr>") + """
                    </tbody>
                </table>
            </div>
            """
            chain_table.update()
            quick_add.clear()
            with quick_add:
                ui.label("Quick add to hedge").classes("text-sm font-semibold uppercase tracking-wide text-slate-500 dark:text-slate-400")
                with ui.row().classes("w-full gap-2 max-sm:flex-col"):
                    for row in rows[:6]:
                        ui.button(
                            f"Add {row['type'].upper()} {row['strike']:.0f}",
                            on_click=lambda _, contract=row: add_to_strategy(contract),
                        ).props("outline color=primary")
            greeks.set_options(rows[:6])

        quick_add = ui.card().classes("w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900")

        def update_filters() -> None:
            selected_expiry["value"] = expiry_select.value
            strike_range["min"] = float(min_strike.value)
            strike_range["max"] = float(max_strike.value)
            if strike_range["min"] > strike_range["max"]:
                strike_range["min"], strike_range["max"] = strike_range["max"], strike_range["min"]
                min_strike.value = strike_range["min"]
                max_strike.value = strike_range["max"]
            render_chain()

        expiry_select.on_value_change(lambda _: update_filters())
        min_strike.on_value_change(lambda _: update_filters())
        max_strike.on_value_change(lambda _: update_filters())
        strategy_select.on_value_change(lambda event: (selected_strategy.__setitem__("value", event.value), render_selection()))

        render_selection()
        render_chain()