"""SX docs page routes.

Page GET routes are defined declaratively in sxc/pages/docs.sx via defpage.
Example API endpoints are now defined in sx/handlers/examples.sx via defhandler.
This file contains only SSE and marsh demo endpoints that need Python.
"""
from __future__ import annotations

import asyncio
import random
from datetime import datetime

from quart import Blueprint, Response, request


def register(url_prefix: str = "/") -> Blueprint:
    bp = Blueprint("pages", __name__, url_prefix=url_prefix)

    # ------------------------------------------------------------------
    # Reference API endpoints — remaining Python-only
    #
    # Most reference endpoints migrated to sx/sx/handlers/ref-api.sx.
    # SSE stays in Python — fundamentally different paradigm (async generator).
    # ------------------------------------------------------------------

    @bp.get("/sx/(geography.(hypermedia.(reference.(api.sse-time))))")
    async def ref_sse_time():
        async def generate():
            for _ in range(30):  # stream for 60 seconds max
                now = datetime.now().strftime("%H:%M:%S")
                sx_src = f'(span :class "text-emerald-700 font-mono text-sm" "Server time: {now}")'
                yield f"event: time\ndata: {sx_src}\n\n"
                await asyncio.sleep(2)
        return Response(generate(), content_type="text/event-stream",
                       headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no"})

    # --- Marsh demos ---

    _marsh_sale_idx = {"n": 0}

    @bp.get("/sx/(geography.(reactive.(api.flash-sale)))")
    async def api_marsh_flash_sale():
        from shared.sx.helpers import sx_response
        prices = [14.99, 9.99, 24.99, 12.49, 7.99, 29.99, 4.99, 16.50]
        _marsh_sale_idx["n"] = (_marsh_sale_idx["n"] + 1) % len(prices)
        new_price = prices[_marsh_sale_idx["n"]]
        now = datetime.now().strftime("%H:%M:%S")
        sx_src = (
            f'(<>'
            f'  (div :class "space-y-2"'
            f'    (p :class "text-sm text-emerald-600 font-medium"'
            f'      "\u26A1 Flash sale! Price: ${new_price:.2f}")'
            f'    (p :class "text-xs text-stone-400" "at {now}"))'
            f'  (script :type "text/sx" :data-init ""'
            f'    "(reset! (use-store \\"demo-price\\") {new_price})"))'
        )
        return sx_response(sx_src)

    # --- Demo 3: sx-on-settle endpoint ---

    _settle_counter = {"n": 0}

    @bp.get("/sx/(geography.(reactive.(api.settle-data)))")
    async def api_settle_data():
        from shared.sx.helpers import sx_response
        _settle_counter["n"] += 1
        items = ["Widget", "Gadget", "Sprocket", "Gizmo", "Doohickey"]
        item = items[_settle_counter["n"] % len(items)]
        now = datetime.now().strftime("%H:%M:%S")
        sx_src = (
            f'(div :class "space-y-1"'
            f'  (p :class "text-sm font-medium text-stone-700" "Fetched: {item}")'
            f'  (p :class "text-xs text-stone-400" "at {now}"))'
        )
        return sx_response(sx_src)

    # --- Demo 4: signal-bound URL endpoints ---

    @bp.get("/sx/(geography.(reactive.(api.search-products)))")
    async def api_search_products():
        from shared.sx.helpers import sx_response
        q = request.args.get("q", "")
        items = ["Artisan Widget", "Premium Gadget", "Handcrafted Sprocket",
                 "Bespoke Gizmo", "Organic Doohickey"]
        matches = [i for i in items if q.lower() in i.lower()] if q else items
        rows = " ".join(
            f'(li :class "text-sm text-stone-600" "{m}")'
            for m in matches[:3]
        )
        sx_src = (
            f'(div :class "space-y-1"'
            f'  (p :class "text-xs font-semibold text-violet-600 uppercase" "Products")'
            f'  (ul :class "list-disc pl-4" {rows})'
            f'  (p :class "text-xs text-stone-400" "{len(matches)} result(s)"))'
        )
        return sx_response(sx_src)

    @bp.get("/sx/(geography.(reactive.(api.search-events)))")
    async def api_search_events():
        from shared.sx.helpers import sx_response
        q = request.args.get("q", "")
        items = ["Summer Workshop", "Craft Fair", "Open Studio",
                 "Artist Talk", "Gallery Opening"]
        matches = [i for i in items if q.lower() in i.lower()] if q else items
        rows = " ".join(
            f'(li :class "text-sm text-stone-600" "{m}")'
            for m in matches[:3]
        )
        sx_src = (
            f'(div :class "space-y-1"'
            f'  (p :class "text-xs font-semibold text-emerald-600 uppercase" "Events")'
            f'  (ul :class "list-disc pl-4" {rows})'
            f'  (p :class "text-xs text-stone-400" "{len(matches)} result(s)"))'
        )
        return sx_response(sx_src)

    @bp.get("/sx/(geography.(reactive.(api.search-posts)))")
    async def api_search_posts():
        from shared.sx.helpers import sx_response
        q = request.args.get("q", "")
        items = ["On Craft and Code", "The SX Manifesto", "Islands and Lakes",
                 "Reactive Marshes", "Self-Hosting Spec"]
        matches = [i for i in items if q.lower() in i.lower()] if q else items
        rows = " ".join(
            f'(li :class "text-sm text-stone-600" "{m}")'
            for m in matches[:3]
        )
        sx_src = (
            f'(div :class "space-y-1"'
            f'  (p :class "text-xs font-semibold text-amber-600 uppercase" "Posts")'
            f'  (ul :class "list-disc pl-4" {rows})'
            f'  (p :class "text-xs text-stone-400" "{len(matches)} result(s)"))'
        )
        return sx_response(sx_src)

    # --- Demo 5: marsh transform endpoint ---

    @bp.get("/sx/(geography.(reactive.(api.catalog)))")
    async def api_catalog():
        from shared.sx.helpers import sx_response
        items = [
            ("Artisan Widget", "19.99", "Hand-crafted with care"),
            ("Premium Gadget", "34.50", "Top-of-the-line quality"),
            ("Vintage Sprocket", "12.99", "Classic design"),
            ("Custom Gizmo", "27.00", "Made to order"),
        ]
        random.shuffle(items)
        now = datetime.now().strftime("%H:%M:%S")
        # Build an SX list literal for the data-init script.
        # Inner quotes must be escaped since the whole expression lives
        # inside an SX string literal (the script tag's text content).
        items_sx = "(list " + " ".join(
            f'(dict \\"name\\" \\"{n}\\" \\"price\\" \\"{p}\\" \\"desc\\" \\"{d}\\")'
            for n, p, d in items
        ) + ")"
        sx_src = (
            f'(<>'
            f'  (p :class "text-sm text-emerald-600 font-medium"'
            f'    "Catalog loaded: {len(items)} items (shuffled at {now})")'
            f'  (script :type "text/sx" :data-init ""'
            f'    "(reset! (use-store \\"catalog-items\\") {items_sx})"))'
        )
        return sx_response(sx_src)

    return bp