"""
Orders service s-expression page components.

Each function renders a complete page section (full page, OOB, or pagination)
using shared s-expression components.  Called from route handlers in place
of ``render_template()``.
"""
from __future__ import annotations

from typing import Any

from shared.sexp.jinja_bridge import sexp, register_components
from shared.sexp.helpers import (
    call_url, get_asset_url, root_header_html,
    search_mobile_html, search_desktop_html, full_page, oob_page,
)
from shared.sexp.page import HAMBURGER_HTML
from shared.infrastructure.urls import market_product_url


# ---------------------------------------------------------------------------
# Service-specific component definitions
# ---------------------------------------------------------------------------

def load_orders_components() -> None:
    """Register orders-specific s-expression components (placeholder for future)."""
    pass


# ---------------------------------------------------------------------------
# Header helpers (shared auth + orders-specific)
# ---------------------------------------------------------------------------

def _auth_nav_html(ctx: dict) -> str:
    """Auth section desktop nav items."""
    html = sexp(
        '(~nav-link :href h :label "newsletters" :select-colours sc)',
        h=call_url(ctx, "account_url", "/newsletters/"),
        sc=ctx.get("select_colours", ""),
    )
    account_nav_html = ctx.get("account_nav_html", "")
    if account_nav_html:
        html += account_nav_html
    return html


def _auth_header_html(ctx: dict, *, oob: bool = False) -> str:
    """Build the account section header row."""
    return sexp(
        '(~menu-row :id "auth-row" :level 1 :colour "sky"'
        ' :link-href lh :link-label "account" :icon "fa-solid fa-user"'
        ' :nav-html nh :child-id "auth-header-child" :oob oob)',
        lh=call_url(ctx, "account_url", "/"),
        nh=_auth_nav_html(ctx),
        oob=oob,
    )


def _orders_header_html(ctx: dict, list_url: str) -> str:
    """Build the orders section header row."""
    return sexp(
        '(~menu-row :id "orders-row" :level 2 :colour "sky"'
        ' :link-href lh :link-label "Orders" :icon "fa fa-gbp"'
        ' :child-id "orders-header-child")',
        lh=list_url,
    )


# ---------------------------------------------------------------------------
# Orders list rendering
# ---------------------------------------------------------------------------

def _order_row_html(order: Any, detail_url: str) -> str:
    """Render a single order as desktop table row + mobile card."""
    status = order.status or "pending"
    sl = status.lower()
    pill = (
        "border-emerald-300 bg-emerald-50 text-emerald-700" if sl == "paid"
        else "border-rose-300 bg-rose-50 text-rose-700" if sl in ("failed", "cancelled")
        else "border-stone-300 bg-stone-50 text-stone-700"
    )
    created = order.created_at.strftime("%-d %b %Y, %H:%M") if order.created_at else "\u2014"
    total = f"{order.currency or 'GBP'} {order.total_amount or 0:.2f}"

    return (
        # Desktop row
        f'<tr class="hidden sm:table-row border-t border-stone-100 hover:bg-stone-50/60">'
        f'<td class="px-3 py-2 align-top"><span class="font-mono text-[11px] sm:text-xs">#{order.id}</span></td>'
        f'<td class="px-3 py-2 align-top text-stone-700 text-xs sm:text-sm">{created}</td>'
        f'<td class="px-3 py-2 align-top text-stone-700 text-xs sm:text-sm">{order.description or ""}</td>'
        f'<td class="px-3 py-2 align-top text-stone-700 text-xs sm:text-sm">{total}</td>'
        f'<td class="px-3 py-2 align-top"><span class="inline-flex items-center rounded-full border px-2 py-0.5 text-[11px] sm:text-xs {pill}">{status}</span></td>'
        f'<td class="px-3 py-0.5 align-top text-right"><a href="{detail_url}" class="inline-flex items-center px-3 py-1.5 text-xs sm:text-sm rounded-full border border-stone-300 bg-white hover:bg-stone-50 transition">View</a></td></tr>'
        # Mobile row
        f'<tr class="sm:hidden border-t border-stone-100"><td colspan="5" class="px-3 py-3"><div class="flex flex-col gap-2 text-xs">'
        f'<div class="flex items-center justify-between gap-2"><span class="font-mono text-[11px] text-stone-700">#{order.id}</span>'
        f'<span class="inline-flex items-center rounded-full border px-2 py-0.5 text-[11px] {pill}">{status}</span></div>'
        f'<div class="text-[11px] text-stone-500 break-words">{created}</div>'
        f'<div class="flex items-center justify-between gap-2"><div class="font-medium text-stone-800">{total}</div>'
        f'<a href="{detail_url}" class="inline-flex items-center px-2 py-1 text-[11px] rounded-full border border-stone-300 bg-white hover:bg-stone-50 transition shrink-0">View</a></div></div></td></tr>'
    )


def _orders_rows_html(orders: list, page: int, total_pages: int,
                      url_for_fn: Any, qs_fn: Any) -> str:
    """Render order rows + infinite scroll sentinel."""
    from shared.utils import route_prefix
    pfx = route_prefix()

    parts = [
        _order_row_html(o, pfx + url_for_fn("orders.order.order_detail", order_id=o.id))
        for o in orders
    ]

    if page < total_pages:
        next_url = pfx + url_for_fn("orders.list_orders") + qs_fn(page=page + 1)
        parts.append(sexp(
            '(~infinite-scroll :url u :page p :total-pages tp :id-prefix "orders" :colspan 5)',
            u=next_url, p=page, **{"total-pages": total_pages},
        ))
    else:
        parts.append('<tr><td colspan="5" class="px-3 py-4 text-center text-xs text-stone-400">End of results</td></tr>')

    return "".join(parts)


def _orders_main_panel_html(orders: list, rows_html: str) -> str:
    """Main panel with table or empty state."""
    if not orders:
        return (
            '<div class="max-w-full px-3 py-3 space-y-3">'
            '<div class="rounded-2xl border border-dashed border-stone-300 bg-white/80 p-4 sm:p-6 text-sm text-stone-700">'
            'No orders yet.</div></div>'
        )
    return (
        '<div class="max-w-full px-3 py-3 space-y-3">'
        '<div class="overflow-x-auto rounded-2xl border border-stone-200 bg-white/80">'
        '<table class="min-w-full text-xs sm:text-sm">'
        '<thead class="bg-stone-50 border-b border-stone-200 text-stone-600"><tr>'
        '<th class="px-3 py-2 text-left font-medium">Order</th>'
        '<th class="px-3 py-2 text-left font-medium">Created</th>'
        '<th class="px-3 py-2 text-left font-medium">Description</th>'
        '<th class="px-3 py-2 text-left font-medium">Total</th>'
        '<th class="px-3 py-2 text-left font-medium">Status</th>'
        '<th class="px-3 py-2 text-left font-medium"></th>'
        f'</tr></thead><tbody>{rows_html}</tbody></table></div></div>'
    )


def _orders_summary_html(ctx: dict) -> str:
    """Filter section for orders list."""
    return (
        '<header class="mb-6 sm:mb-8 flex flex-col sm:flex-row sm:items-center justify-between gap-3 sm:gap-4">'
        '<div class="space-y-1"><p class="text-xs sm:text-sm text-stone-600">Recent orders placed via the checkout.</p></div>'
        f'<div class="md:hidden">{search_mobile_html(ctx)}</div>'
        '</header>'
    )


# ---------------------------------------------------------------------------
# Public API: orders list
# ---------------------------------------------------------------------------

async def render_orders_page(ctx: dict, orders: list, page: int,
                             total_pages: int, search: str | None,
                             search_count: int, url_for_fn: Any,
                             qs_fn: Any) -> str:
    """Full page: orders list."""
    from shared.utils import route_prefix

    ctx["search"] = search
    ctx["search_count"] = search_count
    list_url = route_prefix() + url_for_fn("orders.list_orders")

    rows = _orders_rows_html(orders, page, total_pages, url_for_fn, qs_fn)
    main = _orders_main_panel_html(orders, rows)

    hdr = root_header_html(ctx)
    hdr += sexp(
        '(div :id "root-header-child" :class "flex flex-col w-full items-center" (raw! a) (raw! o))',
        a=_auth_header_html(ctx), o=_orders_header_html(ctx, list_url),
    )

    return full_page(ctx, header_rows_html=hdr,
                     filter_html=_orders_summary_html(ctx),
                     aside_html=search_desktop_html(ctx),
                     content_html=main)


async def render_orders_rows(ctx: dict, orders: list, page: int,
                             total_pages: int, url_for_fn: Any,
                             qs_fn: Any) -> str:
    """Pagination: just the table rows."""
    return _orders_rows_html(orders, page, total_pages, url_for_fn, qs_fn)


async def render_orders_oob(ctx: dict, orders: list, page: int,
                            total_pages: int, search: str | None,
                            search_count: int, url_for_fn: Any,
                            qs_fn: Any) -> str:
    """OOB response for HTMX navigation to orders list."""
    from shared.utils import route_prefix

    ctx["search"] = search
    ctx["search_count"] = search_count
    list_url = route_prefix() + url_for_fn("orders.list_orders")

    rows = _orders_rows_html(orders, page, total_pages, url_for_fn, qs_fn)
    main = _orders_main_panel_html(orders, rows)

    oobs = (
        _auth_header_html(ctx, oob=True)
        + sexp(
            '(div :id "auth-header-child" :hx-swap-oob "outerHTML"'
            ' :class "flex flex-col w-full items-center" (raw! o))',
            o=_orders_header_html(ctx, list_url),
        )
        + root_header_html(ctx, oob=True)
    )

    return oob_page(ctx, oobs_html=oobs,
                    filter_html=_orders_summary_html(ctx),
                    aside_html=search_desktop_html(ctx),
                    content_html=main)


# ---------------------------------------------------------------------------
# Single order detail
# ---------------------------------------------------------------------------

def _order_items_html(order: Any) -> str:
    """Render order items list."""
    if not order or not order.items:
        return ""
    items = []
    for item in order.items:
        prod_url = market_product_url(item.product_slug)
        img = (
            f'<img src="{item.product_image}" alt="{item.product_title or "Product image"}"'
            f' class="w-full h-full object-contain object-center" loading="lazy" decoding="async">'
            if item.product_image else
            '<div class="w-full h-full flex items-center justify-center text-[9px] text-stone-400">No image</div>'
        )
        items.append(
            f'<li><a class="w-full py-2 flex gap-3" href="{prod_url}">'
            f'<div class="w-12 h-12 sm:w-14 sm:h-14 rounded-md bg-stone-100 flex-shrink-0 overflow-hidden">{img}</div>'
            f'<div class="flex-1 flex justify-between gap-3">'
            f'<div><p class="font-medium">{item.product_title or "Unknown product"}</p>'
            f'<p class="text-[11px] text-stone-500">Product ID: {item.product_id}</p></div>'
            f'<div class="text-right whitespace-nowrap"><p>Qty: {item.quantity}</p>'
            f'<p>{item.currency or order.currency or "GBP"} {item.unit_price or 0:.2f}</p>'
            f'</div></div></a></li>'
        )
    return (
        '<div class="rounded-2xl border border-stone-200 bg-white/80 p-4 sm:p-6">'
        '<h2 class="text-sm sm:text-base font-semibold mb-3">Items</h2>'
        f'<ul class="divide-y divide-stone-100 text-xs sm:text-sm">{"".join(items)}</ul></div>'
    )


def _calendar_items_html(calendar_entries: list | None) -> str:
    """Render calendar bookings for an order."""
    if not calendar_entries:
        return ""
    items = []
    for e in calendar_entries:
        st = e.state or ""
        pill = (
            "bg-emerald-100 text-emerald-800" if st == "confirmed"
            else "bg-amber-100 text-amber-800" if st == "provisional"
            else "bg-blue-100 text-blue-800" if st == "ordered"
            else "bg-stone-100 text-stone-700"
        )
        ds = e.start_at.strftime("%-d %b %Y, %H:%M") if e.start_at else ""
        if e.end_at:
            ds += f" \u2013 {e.end_at.strftime('%-d %b %Y, %H:%M')}"
        items.append(
            f'<li class="px-4 py-3 flex items-start justify-between text-sm">'
            f'<div><div class="font-medium flex items-center gap-2">{e.name}'
            f'<span class="inline-flex items-center rounded-full px-2 py-0.5 text-[11px] font-medium {pill}">'
            f'{st.capitalize()}</span></div>'
            f'<div class="text-xs text-stone-500">{ds}</div></div>'
            f'<div class="ml-4 font-medium">\u00a3{e.cost or 0:.2f}</div></li>'
        )
    return (
        '<section class="mt-6 space-y-3">'
        '<h2 class="text-base sm:text-lg font-semibold">Calendar bookings in this order</h2>'
        f'<ul class="divide-y divide-stone-200 rounded-2xl border border-stone-200 bg-white/80">{"".join(items)}</ul></section>'
    )


def _order_main_html(order: Any, calendar_entries: list | None) -> str:
    """Main panel for single order detail."""
    summary = sexp(
        '(~order-summary-card :order-id oid :created-at ca :description d :status s :currency c :total-amount ta)',
        oid=order.id,
        ca=order.created_at.strftime("%-d %b %Y, %H:%M") if order.created_at else None,
        d=order.description, s=order.status, c=order.currency,
        ta=f"{order.total_amount:.2f}" if order.total_amount else None,
    )
    return f'<div class="max-w-full px-3 py-3 space-y-4">{summary}{_order_items_html(order)}{_calendar_items_html(calendar_entries)}</div>'


def _order_filter_html(order: Any, list_url: str, recheck_url: str,
                       pay_url: str, csrf_token: str) -> str:
    """Filter section for single order detail."""
    created = order.created_at.strftime("%-d %b %Y, %H:%M") if order.created_at else "\u2014"
    status = order.status or "pending"
    pay = (
        f'<a href="{pay_url}" class="inline-flex items-center px-3 py-2 text-xs sm:text-sm '
        f'rounded-full border border-emerald-600 bg-emerald-600 text-white hover:bg-emerald-700 transition">'
        f'<i class="fa fa-credit-card mr-2" aria-hidden="true"></i>Open payment page</a>'
    ) if status != "paid" else ""

    return (
        '<header class="mb-6 sm:mb-8 flex flex-col sm:flex-row sm:items-center justify-between gap-3 sm:gap-4">'
        f'<div class="space-y-1"><p class="text-xs sm:text-sm text-stone-600">Placed {created} &middot; Status: {status}</p></div>'
        '<div class="flex w-full sm:w-auto justify-start sm:justify-end gap-2">'
        f'<a href="{list_url}" class="inline-flex items-center px-3 py-2 text-xs sm:text-sm rounded-full border border-stone-300 bg-white hover:bg-stone-50 transition"><i class="fa-solid fa-list mr-2" aria-hidden="true"></i>All orders</a>'
        f'<form method="post" action="{recheck_url}" class="inline"><input type="hidden" name="csrf_token" value="{csrf_token}">'
        f'<button type="submit" class="inline-flex items-center px-3 py-2 text-xs sm:text-sm rounded-full border border-stone-300 bg-white hover:bg-stone-50 transition"><i class="fa-solid fa-rotate mr-2" aria-hidden="true"></i>Re-check status</button></form>'
        f'{pay}</div></header>'
    )


async def render_order_page(ctx: dict, order: Any,
                            calendar_entries: list | None,
                            url_for_fn: Any) -> str:
    """Full page: single order detail."""
    from shared.utils import route_prefix
    from shared.browser.app.csrf import generate_csrf_token

    pfx = route_prefix()
    detail_url = pfx + url_for_fn("orders.order.order_detail", order_id=order.id)
    list_url = pfx + url_for_fn("orders.list_orders")
    recheck_url = pfx + url_for_fn("orders.order.order_recheck", order_id=order.id)
    pay_url = pfx + url_for_fn("orders.order.order_pay", order_id=order.id)

    main = _order_main_html(order, calendar_entries)
    filt = _order_filter_html(order, list_url, recheck_url, pay_url, generate_csrf_token())

    # Header stack: root -> auth -> orders -> order
    hdr = root_header_html(ctx)
    order_row = sexp(
        '(~menu-row :id "order-row" :level 3 :colour "sky" :link-href lh :link-label "Order" :icon "fa fa-gbp")',
        lh=detail_url,
    )
    hdr += sexp(
        '(div :id "root-header-child" :class "flex flex-col w-full items-center" (raw! a)'
        ' (div :id "auth-header-child" :class "flex flex-col w-full items-center" (raw! b)'
        '   (div :id "orders-header-child" :class "flex flex-col w-full items-center" (raw! c))))',
        a=_auth_header_html(ctx),
        b=_orders_header_html(ctx, list_url),
        c=order_row,
    )

    return full_page(ctx, header_rows_html=hdr, filter_html=filt, content_html=main)


async def render_order_oob(ctx: dict, order: Any,
                           calendar_entries: list | None,
                           url_for_fn: Any) -> str:
    """OOB response for single order detail."""
    from shared.utils import route_prefix
    from shared.browser.app.csrf import generate_csrf_token

    pfx = route_prefix()
    detail_url = pfx + url_for_fn("orders.order.order_detail", order_id=order.id)
    list_url = pfx + url_for_fn("orders.list_orders")
    recheck_url = pfx + url_for_fn("orders.order.order_recheck", order_id=order.id)
    pay_url = pfx + url_for_fn("orders.order.order_pay", order_id=order.id)

    main = _order_main_html(order, calendar_entries)
    filt = _order_filter_html(order, list_url, recheck_url, pay_url, generate_csrf_token())

    order_row_oob = sexp(
        '(~menu-row :id "order-row" :level 3 :colour "sky" :link-href lh :link-label "Order" :icon "fa fa-gbp" :oob true)',
        lh=detail_url,
    )
    oobs = (
        sexp('(div :id "orders-header-child" :hx-swap-oob "outerHTML" :class "flex flex-col w-full items-center" (raw! o))', o=order_row_oob)
        + root_header_html(ctx, oob=True)
    )

    return oob_page(ctx, oobs_html=oobs, filter_html=filt, content_html=main)