"""Accessibility (a11y) tests — WCAG 2.1 AA static HTML analysis.

Every HTML-generating component function in ``shopstack.ui`` is parsed with
BeautifulSoup and validated for correct ARIA attributes, roles, labels, and
semantic structure. No browser/DOM required — unit-testing the static HTML.

Coverage:
  - shopstack.ui.components.primitives  (item_row, stat_card, data_table, ...)
  - shopstack.ui.components.cards       (card, render_decision_card, ...)
  - shopstack.ui.renderers.image_cards  (SVG cards)
  - shopstack.ui.renderers.decision_cards  (market basket, decision panel, ...)
"""

from __future__ import annotations

from bs4 import BeautifulSoup

from shopstack.ui.components.primitives import (
    confirm_dialog,
    data_table,
    empty_state_enhanced,
    item_row,
    loading_skeleton,
    stat_card,
    toast,
)
from shopstack.ui.components.cards import (
    badge_html,
    card,
    empty_state,
    render_action_grid,
    render_action_tile,
    render_grouped_cards,
    render_decision_card as render_decision_card_html,
    render_hero_panel,
    render_metric,
    render_rows,
    render_workflow_rail,
)
from shopstack.ui.renderers import (
    decision_cards as dc,
    image_cards as ic,
    shopping_results as sr,
)
from shopstack.services.results import (
    CompletionItem,
    MarkPurchasedResult,
    PurchaseResultItem,
    ShoppingCompletionResult,
)
from shopstack.schemas.models import DecisionSet, DecisionResult
from shopstack.ui.screens._utils import (
    render_home_advice,
    render_list_summary,
    render_low_stock,
    render_recent_purchases,
)


# ═══════════════════════════════════════════════════════════════════════
# Helpers
# ═══════════════════════════════════════════════════════════════════════


def _parse(html: str) -> BeautifulSoup:
    """Parse HTML string with lxml and return a BeautifulSoup tree."""
    return BeautifulSoup(html, "lxml")


def _assert_role(soup: BeautifulSoup, role: str, msg: str = "") -> None:
    """Assert that at least one element has the given role."""
    assert soup.find(attrs={"role": role}) is not None, (
        msg or f"Expected role='{role}' not found in HTML"
    )


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.components.primitives
# ═══════════════════════════════════════════════════════════════════════


class TestItemRow:
    """WCAG: role='group', aria-label includes name+quantity."""

    def test_role_group_present(self):
        html = item_row("Milk", 2.0, "L")
        soup = _parse(html)
        _assert_role(soup, "group", "item_row missing role='group'")

    def test_aria_label_contains_name_and_quantity(self):
        html = item_row("Milk", 2.0, "L")
        soup = _parse(html)
        el = soup.find(attrs={"role": "group"})
        assert el is not None
        label = el.get("aria-label", "")
        assert "Milk" in label
        assert "2.0" in label or "2 L" in label

    def test_aria_label_with_decision(self):
        html = item_row("Eggs", 12, "pieces", decision="buy")
        soup = _parse(html)
        el = soup.find(attrs={"role": "group"})
        assert el is not None
        assert "Eggs" in el.get("aria-label", "")

    def test_escaped_content_does_not_break_html(self):
        """html.escape is applied; HTML injection should be escaped."""
        html = item_row('<script>alert("xss")</script>', 1, "unit")
        assert "&lt;script&gt;" in html
        assert "<script>" not in html


class TestStatCard:
    """WCAG: role='region', aria-label includes value+label."""

    def test_role_region_present(self):
        html = stat_card("12", "Items")
        soup = _parse(html)
        _assert_role(soup, "region", "stat_card missing role='region'")

    def test_aria_label_contains_value_and_label(self):
        html = stat_card("\u20b9340", "Spent", icon="\U0001f4b0")
        soup = _parse(html)
        el = soup.find(attrs={"role": "region"})
        assert el is not None
        label = el.get("aria-label", "")
        assert "340" in label or "Spent" in label

    def test_icon_rendered_when_provided(self):
        html = stat_card("3", "Todos", icon="\U0001f4cb")
        assert "\U0001f4cb" in html


class TestDataTable:
    """WCAG: role='region', aria-label, <caption class='sr-only'>."""

    def test_role_region_present(self):
        html = data_table([{"name": "Milk", "qty": "2"}])
        soup = _parse(html)
        _assert_role(soup, "region", "data_table missing role='region'")

    def test_aria_label_contains_table_description(self):
        html = data_table([{"name": "Milk", "qty": "2"}])
        soup = _parse(html)
        el = soup.find(attrs={"role": "region"})
        assert el is not None
        label = el.get("aria-label", "")
        # When empty_message is default "No data", aria-label becomes "Table: data table"
        assert "Table:" in label or "table" in label.lower()

    def test_custom_aria_label_uses_empty_message(self):
        html = data_table([{"name": "Milk", "qty": "2"}], empty_message="Inventory items")
        soup = _parse(html)
        el = soup.find(attrs={"role": "region"})
        assert el is not None
        label = el.get("aria-label", "")
        assert "Inventory" in label

    def test_caption_sr_only_present(self):
        html = data_table([{"name": "Milk", "qty": "2"}])
        soup = _parse(html)
        caption = soup.find("caption")
        assert caption is not None, "data_table missing <caption>"
        assert "sr-only" in caption.get("class", []), (
            "caption missing sr-only class"
        )

    def test_empty_state_returns_home_card(self):
        """Empty states return a home-card div (no role='region' — just a
        plain <div class='home-card'>)."""
        html = data_table([], empty_message="No inventory")
        assert "home-card" in html
        assert "No inventory" in html


class TestConfirmDialog:
    """WCAG: role='alertdialog', aria-label, icon aria-hidden='true'."""

    def test_role_alertdialog_present(self):
        html = confirm_dialog("Delete this item?")
        soup = _parse(html)
        _assert_role(soup, "alertdialog",
                     "confirm_dialog missing role='alertdialog'")

    def test_aria_label_contains_message(self):
        html = confirm_dialog("Delete this item?")
        soup = _parse(html)
        el = soup.find(attrs={"role": "alertdialog"})
        assert el is not None
        assert "Delete" in el.get("aria-label", "")

    def test_warning_icon_aria_hidden(self):
        html = confirm_dialog("Are you sure?")
        soup = _parse(html)
        icon = soup.find(attrs={"aria-hidden": "true"})
        assert icon is not None, \
            "confirm_dialog icon missing aria-hidden='true'"

    def test_danger_variant(self):
        html = confirm_dialog("Delete permanently?", variant="danger")
        assert "alertdialog" in html


class TestToast:
    """WCAG: role='status', aria-live='polite', aria-label, icon aria-hidden."""

    def test_role_status_present(self):
        html = toast("Item added", kind="success")
        soup = _parse(html)
        _assert_role(soup, "status", "toast missing role='status'")

    def test_aria_live_polite(self):
        html = toast("Item added")
        # The HTML uses aria-live='polite' (single quotes inside f-string)
        assert "aria-live=" in html and "polite" in html, \
            "toast missing aria-live='polite'"

    def test_aria_label_contains_message(self):
        html = toast("Item added", kind="success")
        soup = _parse(html)
        el = soup.find(attrs={"role": "status"})
        assert el is not None
        assert "Item added" in el.get("aria-label", "")

    def test_icon_aria_hidden(self):
        html = toast("Error occurred", kind="error")
        soup = _parse(html)
        icon = soup.find(attrs={"aria-hidden": "true"})
        assert icon is not None, "toast icon missing aria-hidden='true'"

    def test_error_kind_renders(self):
        html = toast("Something failed", kind="error")
        assert "role=" in html

    def test_info_kind_renders(self):
        html = toast("FYI", kind="info")
        assert "role=" in html

    def test_warning_kind_renders(self):
        html = toast("Be careful", kind="warning")
        assert "role=" in html


class TestEmptyStateEnhanced:
    """WCAG: role='status', aria-label, icon aria-hidden."""

    def test_role_status_present(self):
        html = empty_state_enhanced("No items found")
        soup = _parse(html)
        _assert_role(soup, "status",
                     "empty_state_enhanced missing role='status'")

    def test_aria_label_contains_message(self):
        html = empty_state_enhanced("No items found")
        soup = _parse(html)
        el = soup.find(attrs={"role": "status"})
        assert el is not None
        assert "No items found" in el.get("aria-label", "")

    def test_icon_aria_hidden(self):
        html = empty_state_enhanced("Empty!", icon="\U0001f4e6")
        soup = _parse(html)
        icon = soup.find(attrs={"aria-hidden": "true"})
        assert icon is not None, \
            "empty_state icon missing aria-hidden='true'"

    def test_with_cta_button(self):
        html = empty_state_enhanced(
            "No items",
            action_label="Add Item",
            on_click_tab="inventory",
        )
        assert "Add Item" in html
        assert "button" in html


class TestLoadingSkeleton:
    """No specific WCAG requirements — decorative placeholder."""

    def test_card_variant_renders(self):
        html = loading_skeleton(variant="card")
        assert html.strip()

    def test_table_variant_renders(self):
        html = loading_skeleton(variant="table")
        assert html.strip()

    def test_metric_variant_renders(self):
        html = loading_skeleton(variant="metric")
        assert html.strip()

    def test_text_variant_renders(self):
        html = loading_skeleton(variant="text")
        assert html.strip()


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.components.cards
# ═══════════════════════════════════════════════════════════════════════


class TestCard:
    """WCAG: role='region', aria-labelledby pointing to a valid id."""

    def test_role_region_present(self):
        html = card("My Title", "body content")
        soup = _parse(html)
        _assert_role(soup, "region", "card missing role='region'")

    def test_aria_labelledby_points_to_valid_id(self):
        html = card("My Title", "body content")
        soup = _parse(html)
        el = soup.find(attrs={"role": "region"})
        assert el is not None
        labelledby = el.get("aria-labelledby", "")
        assert labelledby, "card missing aria-labelledby"
        heading = soup.find(id=labelledby)
        assert heading is not None, (
            f"card aria-labelledby='{labelledby}' has no matching element"
        )

    def test_heading_text_matches_labelledby_id(self):
        html = card("Shopping List", "content")
        soup = _parse(html)
        el = soup.find(attrs={"role": "region"})
        assert el is not None
        labelledby = el.get("aria-labelledby", "")
        heading = soup.find(id=labelledby)
        assert heading is not None
        assert "Shopping List" in heading.get_text()


class TestRenderDecisionCardHTML:
    """WCAG: role='article', aria-label with name+decision."""

    def test_role_article_present(self):
        html = render_decision_card_html("Milk", "buy", "Running low", 0.85)
        soup = _parse(html)
        _assert_role(soup, "article",
                     "decision_card missing role='article'")

    def test_aria_label_contains_name_and_decision(self):
        html = render_decision_card_html("Milk", "buy", "Running low", 0.85)
        soup = _parse(html)
        el = soup.find(attrs={"role": "article"})
        assert el is not None
        label = el.get("aria-label", "")
        assert "Milk" in label
        assert "BUY" in label

    def test_confidence_displayed(self):
        html = render_decision_card_html("Milk", "buy", "Running low", 0.85)
        assert "85" in html


class TestRenderActionTile:
    """WCAG: aria-label with label+subtitle."""

    def test_aria_label_present(self):
        html = render_action_tile("Add Item", "Record a purchase", "inventory")
        soup = _parse(html)
        btn = soup.find("button")
        assert btn is not None
        label = btn.get("aria-label", "")
        assert "Add Item" in label

    def test_aria_label_includes_subtitle(self):
        html = render_action_tile("Scan", "Scan a receipt", "receipt")
        soup = _parse(html)
        btn = soup.find("button")
        assert btn is not None
        assert "Scan" in btn.get("aria-label", "")
        assert "receipt" in btn.get("aria-label", "").lower()

    def test_button_element(self):
        html = render_action_tile("Go", "Do something", "tab")
        assert "<button" in html and "</button>" in html

    def test_tone_variant_renders(self):
        html = render_action_tile("Primary", "CTA", "tab", tone="primary")
        assert "primary" in html


class TestRenderActionGrid:
    """render_action_grid wraps tiles in action-grid wrapper."""

    def test_empty_actions_returns_empty_string(self):
        assert render_action_grid([]) == ""

    def test_single_action_renders(self):
        html = render_action_grid([
            {"label": "Scan", "subtitle": "Check a shelf item", "tab_id": "market"},
        ])
        assert "action-grid" in html
        assert "Scan" in html
        assert "Check a shelf item" in html
        assert "<button" in html

    def test_multiple_actions_all_rendered(self):
        html = render_action_grid([
            {"label": "Scan", "subtitle": "Check a shelf item", "tab_id": "market"},
            {"label": "Add", "subtitle": "Record a purchase", "tab_id": "purchase"},
            {"label": "View", "subtitle": "Browse inventory", "tab_id": "inventory"},
        ])
        assert html.count("<button") == 3
        assert "Scan" in html
        assert "Add" in html
        assert "View" in html

    def test_tone_propagated_to_tiles(self):
        html = render_action_grid([
            {"label": "Primary", "subtitle": "CTA", "tab_id": "tab", "tone": "primary"},
            {"label": "Default", "subtitle": "No tone", "tab_id": "tab"},
        ])
        assert "action-tile-primary" in html
        # Default tone should also render
        assert "action-tile-default" in html

    def test_wrapper_class_present(self):
        html = render_action_grid([
            {"label": "X", "subtitle": "Y", "tab_id": "z"},
        ])
        soup = BeautifulSoup(html, "lxml")
        wrapper = soup.find("div", class_="action-grid")
        assert wrapper is not None, "action-grid wrapper div missing"

    def test_labels_and_subtitles_escaped(self):
        html = render_action_grid([
            {"label": "<script>", "subtitle": "<alert>", "tab_id": "tab"},
        ])
        assert "&lt;script&gt;" in html
        assert "&lt;alert&gt;" in html
        assert "<script>" not in html


class TestRenderHeroPanel:
    """Semantic structure: h2 heading, section-kicker."""

    def test_heading_present(self):
        html = render_hero_panel("Welcome", "Your dashboard")
        soup = _parse(html)
        heading = soup.find("h2")
        assert heading is not None
        assert "Welcome" in heading.get_text()


class TestRenderMetric:
    """Semantic structure: metric-label, metric-value."""

    def test_label_and_value_rendered(self):
        html = render_metric("Items", "12")
        assert "Items" in html
        assert "12" in html

    def test_hint_renders_when_provided(self):
        html = render_metric("Items", "12", hint="3 expiring soon")
        assert "3 expiring soon" in html


class TestRenderGroupedCards:
    """render_grouped_cards wraps items in decision cards inside a card."""

    def test_empty_items_returns_empty_string(self):
        assert render_grouped_cards("Title", []) == ""

    def test_single_item_renders(self):
        html = render_grouped_cards("Category", [
            {"canonical_name": "milk", "decision": "buy", "reason": "Running low", "confidence": 0.9},
        ])
        assert "Category" in html
        assert "MILK" in html or "milk" in html
        assert "Running low" in html

    def test_multiple_items_all_rendered(self):
        html = render_grouped_cards("Produce", [
            {"canonical_name": "tomato", "decision": "buy", "reason": "Need for curry", "confidence": 0.85},
            {"canonical_name": "onion", "decision": "buy", "reason": "Running out", "confidence": 0.80},
            {"canonical_name": "coriander", "decision": "skip", "reason": "Already have", "confidence": 0.75},
        ])
        assert "Produce" in html
        assert "tomato" in html or "Tomato" in html
        assert "onion" in html or "Onion" in html
        assert "coriander" in html or "Coriander" in html
        assert "BUY" in html
        assert "SKIP" in html

    def test_item_with_missing_fields_defaults(self):
        """Items missing optional fields should render with defaults."""
        html = render_grouped_cards("Test", [
            {},
        ])
        # Should not crash, should render something
        assert html.strip()

    def test_html_escaped(self):
        html = render_grouped_cards("<hack>", [
            {"canonical_name": "<script>", "decision": "buy", "reason": "<alert>", "confidence": 0.9},
        ])
        assert "&lt;" in html
        assert "<script>" not in html


class TestRenderWorkflowRail:
    """Semantic structure — steps are uppercased for styling."""

    def test_renders_steps_uppercased(self):
        html = render_workflow_rail(["Step 1", "Step 2"], current_step=0)
        # Steps are uppercased via escape(str(step).upper())
        assert "STEP 1" in html
        assert "STEP 2" in html


class TestRenderRows:
    def test_renders_label_value_pairs(self):
        html = render_rows([("Name", "Milk"), ("Qty", "2 L")])
        assert "Milk" in html
        assert "2 L" in html

    def test_empty_returns_fallback(self):
        html = render_rows([])
        assert "No entries" in html


class TestEmptyState:
    def test_message_rendered(self):
        html = empty_state("Nothing here")
        assert "Nothing here" in html


class TestBadgeHTML:
    def test_all_variants(self):
        for variant in ("green", "amber", "red", "blue", "gray", "neutral"):
            html = badge_html("Test", variant)
            assert "badge" in html

    def test_label_escaped(self):
        html = badge_html('<script>alert("xss")</script>', "green")
        assert "&lt;script&gt;" in html
        assert "<script>" not in html


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.renderers.image_cards (SVG components)
# ═══════════════════════════════════════════════════════════════════════


class TestSVGItemCard:
    """WCAG: SVG role='img' + aria-label."""

    def test_svg_role_img_present(self):
        html = ic.render_item_card("Milk", 2.0, "L")
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", \
            "Item card SVG missing role='img'"

    def test_svg_aria_label_contains_item_name(self):
        html = ic.render_item_card("Milk", 2.0, "L")
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert "Milk" in svg.get("aria-label", "")


class TestSVGDecisionCard:
    """WCAG: SVG role='img' + aria-label."""

    def test_svg_role_img_present(self):
        html = ic.render_decision_card("Milk", "buy", "Running low", 0.85)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", \
            "Decision SVG missing role='img'"

    def test_svg_aria_label_contains_item_and_decision(self):
        html = ic.render_decision_card("Milk", "buy", "Running low", 0.85)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        label = svg.get("aria-label", "")
        assert "Milk" in label
        assert "buy" in label.lower()

    def test_wcag_colors_synced(self):
        """SVG decision colors should match WCAG-compliant CSS values."""
        html = ic.render_decision_card("Milk", "buy", "test", 0.9)
        assert "#1A9E4A" in html, \
            "WCAG buy color (#1A9E4A) not found in decision SVG"


class TestSVGUseSoonCard:
    """WCAG: SVG role='img' + aria-label."""

    def test_svg_role_img_present(self):
        html = ic.render_use_soon_card(
            [{"display_name": "Milk", "reason": "Expires soon"}]
        )
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", \
            "Use-soon SVG missing role='img'"

    def test_svg_aria_label_contains_item_count(self):
        html = ic.render_use_soon_card(
            [{"display_name": "Milk", "reason": "Expires soon"}]
        )
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert "item" in svg.get("aria-label", "").lower()


class TestSVGShoppingSummaryCard:
    """WCAG: SVG role='img' + aria-label."""

    def test_svg_role_img_present(self):
        html = ic.render_shopping_summary_card(3, 2, 150.0)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", \
            "Shopping summary SVG missing role='img'"

    def test_svg_aria_label_contains_counts(self):
        html = ic.render_shopping_summary_card(3, 2, 150.0)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        label = svg.get("aria-label", "")
        assert "3" in label or "150" in label


class TestSVGPriceComparisonCard:
    """WCAG: SVG role='img' + aria-label."""

    def test_svg_role_img_present(self):
        html = ic.render_price_comparison_card(
            "Milk", {"Store A": 100, "Store B": 90}
        )
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", \
            "Price comparison SVG missing role='img'"

    def test_svg_aria_label_contains_item_name(self):
        html = ic.render_price_comparison_card("Milk", {"Store A": 100})
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert "Milk" in svg.get("aria-label", "")


class TestSVGCardsToGrid:
    """WCAG: SVG role='img' + aria-label with card count."""

    def test_svg_role_img_present(self):
        cards = [
            ic.render_item_card("Milk", 2.0, "L"),
            ic.render_item_card("Eggs", 12, "pieces"),
        ]
        html = ic.cards_to_grid(cards, columns=2)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert svg.get("role") == "img", "Grid SVG missing role='img'"

    def test_svg_aria_label_contains_card_count(self):
        cards = [ic.render_item_card("Milk", 2.0, "L")]
        html = ic.cards_to_grid(cards, columns=1)
        soup = _parse(html)
        svg = soup.find("svg")
        assert svg is not None
        assert "1" in svg.get("aria-label", "") or "card" in svg.get("aria-label", "")

    def test_empty_cards_returns_empty(self):
        assert ic.cards_to_grid([]) == ""


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.renderers.decision_cards
# ═══════════════════════════════════════════════════════════════════════


def _sample_ds() -> DecisionSet:
    return DecisionSet(
        decisions=[
            DecisionResult(
                canonical_name="milk",
                display_name="Milk",
                action="buy",
                reason="Running low",
                confidence=0.9,
                market_price=50.0,
                market_price_per_kg=200.0,
                market_source="swiggy",
                waste_risk="low",
                shelf_life_days=5,
                data_freshness="fresh",
                data_freshness_label="Snapshot from 10 Jun 2026",
            ),
            DecisionResult(
                canonical_name="eggs",
                display_name="Eggs",
                action="skip",
                reason="Already have",
                confidence=0.8,
                market_price=0,
                market_price_per_kg=0,
                market_source="",
                waste_risk="unknown",
                shelf_life_days=0,
                data_freshness="unknown",
                data_freshness_label="",
            ),
        ]
    )


class TestDecisionCardsMarketBasket:
    """Semantic: h3 heading, estimated total, decision badges."""

    def test_heading_present(self):
        html = dc.render_market_basket(_sample_ds())
        assert "Market Basket" in html

    def test_buy_items_rendered(self):
        html = dc.render_market_basket(_sample_ds())
        assert "Milk" in html

    def test_estimated_total_present(self):
        html = dc.render_market_basket(_sample_ds())
        assert "Estimated total" in html


class TestDecisionCardsDecisionPanel:
    """Semantic: h3 heading, decision labels."""

    def test_heading_present(self):
        html = dc.render_decision_panel(_sample_ds())
        assert "Today's Decisions" in html

    def test_buy_items_appear(self):
        html = dc.render_decision_panel(_sample_ds())
        assert "Milk" in html

    def test_skip_items_appear(self):
        html = dc.render_decision_panel(_sample_ds())
        assert "Eggs" in html


class TestDecisionCardsInventoryOverview:
    def test_total_items_displayed(self):
        html = dc.render_inventory_overview([])
        assert "inventory" in html.lower()

    def test_empty_list_shows_zero(self):
        html = dc.render_inventory_overview([])
        assert any(t in html for t in ("0", "None", "No", "empty"))


class TestDecisionCardsWhatChanged:
    def test_returns_empty_string_for_no_events(self):
        assert dc.render_what_changed([], []) == ""

    def test_heading_present_with_data(self):
        from datetime import datetime

        class MockPurchase:
            canonical_name = "milk"
            timestamp = datetime(2026, 6, 10)

        html = dc.render_what_changed([MockPurchase()], [])
        assert "What Changed" in html or "milk" in html or "Milk" in html


class TestDecisionCardsWasteWarnings:
    def test_returns_empty_string_for_no_signals(self):
        assert dc.render_waste_warnings([]) == ""

    def test_warning_rendered_with_data(self):
        signals = [
            {"display_name": "Milk", "reason": "Expiring in 1 day", "confidence": "high"}
        ]
        html = dc.render_waste_warnings(signals)
        assert "Milk" in html


class TestDecisionCardsSwiggySoldout:
    def test_returns_empty_string_when_all_available(self):
        html = dc.render_swiggy_soldout_warning({"milk": {"available": True}})
        assert html == ""

    def test_warning_rendered_for_sold_out(self):
        html = dc.render_swiggy_soldout_warning(
            {"milk": {"available": False}, "eggs": {"available": True}}
        )
        assert "milk" in html or "Milk" in html


class TestDecisionCardsComparePanel:
    """render_compare_panel: h3 heading, compare/watch items, empty state."""

    def test_empty_returns_no_signals_message(self):
        ds = _sample_ds()  # only has buy and skip
        html = dc.render_compare_panel(ds)
        assert "Compare" in html or "Market Signals" in html
        assert "No comparison signals" in html

    def test_heading_present_with_data(self):
        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="tomato",
                display_name="Tomato",
                action="compare",
                reason="Multiple pack sizes available, 80% price spread",
                confidence=0.75,
                market_price_per_kg=56.0,
                waste_risk="unknown",
                shelf_life_days=0,
            ),
        ])
        html = dc.render_compare_panel(ds)
        assert "Compare / Market Signals" in html
        assert "Compare" in html  # the decision badge label

    def test_compare_item_renders_with_reason(self):
        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="tomato",
                display_name="Tomato",
                action="compare",
                reason="Price spread 80%",
                confidence=0.75,
                market_price_per_kg=56.0,
                waste_risk="unknown",
                shelf_life_days=0,
            ),
        ])
        html = dc.render_compare_panel(ds)
        soup = BeautifulSoup(html, "lxml")
        heading = soup.find("h3")
        assert heading is not None
        assert "Compare" in heading.get_text()

    def test_wait_item_renders_with_wait_badge(self):
        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="sold_out_item",
                display_name="Premium Broccoli",
                action="wait",
                reason="Sold out, waiting for restock",
                confidence=0.6,
                waste_risk="unknown",
                shelf_life_days=0,
            ),
        ])
        html = dc.render_compare_panel(ds)
        assert "WAIT" in html
        assert "Premium Broccoli" in html

    def test_compare_and_wait_both_displayed(self):
        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="tomato", display_name="Tomato",
                action="compare", reason="Price spread 80%",
                confidence=0.75, market_price_per_kg=56.0,
                waste_risk="unknown", shelf_life_days=0,
            ),
            DecisionResult(
                canonical_name="broccoli", display_name="Broccoli",
                action="wait", reason="Sold out",
                confidence=0.6,
                waste_risk="unknown", shelf_life_days=0,
            ),
        ])
        html = dc.render_compare_panel(ds)
        assert "Compare" in html
        assert "WAIT" in html
        assert "Tomato" in html
        assert "Broccoli" in html

    def test_max_items_respected(self):
        """Only first 4 compare and first 4 wait items shown."""
        decisions = [
            DecisionResult(
                canonical_name=f"item_{i}", display_name=f"Item {i}",
                action="compare", reason=f"Reason {i}",
                confidence=0.7, market_price_per_kg=50.0,
                waste_risk="unknown", shelf_life_days=0,
            )
            for i in range(6)
        ]
        ds = DecisionSet(decisions=decisions)
        html = dc.render_compare_panel(ds)
        # Should show at most 4 compare + 0 wait = 4 items total
        for i in range(4):
            assert f"Item {i}" in html
        # Items beyond the [:4] limit must not appear
        assert "Item 5" not in html


class TestDecisionCardsMyListPanel:
    """render_my_list_panel: h3 heading, decision badges, empty state."""

    def test_empty_list_returns_empty_state_html(self):
        html = dc.render_my_list_panel(_sample_ds(), None)
        assert "My Own List" in html
        assert "No active shopping list" in html

    def test_empty_list_with_empty_items_returns_state(self):
        class MockList:
            items = []
        html = dc.render_my_list_panel(_sample_ds(), MockList())
        assert "No active shopping list" in html or "My Own List" in html

    def test_heading_present_with_items(self):
        from shopstack.schemas.models import ShoppingListItem

        class MockList:
            items = [
                ShoppingListItem(canonical_name="milk"),
                ShoppingListItem(canonical_name="eggs"),
            ]

        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="milk", display_name="Milk",
                action="buy", reason="Running low",
                confidence=0.9,
                waste_risk="low", shelf_life_days=5,
            ),
            DecisionResult(
                canonical_name="eggs", display_name="Eggs",
                action="skip", reason="Already have",
                confidence=0.8,
                waste_risk="unknown", shelf_life_days=0,
            ),
        ])
        html = dc.render_my_list_panel(ds, MockList())
        assert "My Own List" in html
        assert "Milk" in html
        assert "Eggs" in html

    def test_decision_badge_colors_match_action(self):
        from shopstack.schemas.models import ShoppingListItem

        class MockList:
            items = [
                ShoppingListItem(canonical_name="milk"),
                ShoppingListItem(canonical_name="eggs"),
            ]

        ds = DecisionSet(decisions=[
            DecisionResult(
                canonical_name="milk", display_name="Milk",
                action="buy", reason="Running low",
                confidence=0.9,
                waste_risk="low", shelf_life_days=5,
            ),
            DecisionResult(
                canonical_name="eggs", display_name="Eggs",
                action="skip", reason="Already have",
                confidence=0.8,
                waste_risk="unknown", shelf_life_days=0,
            ),
        ])
        html = dc.render_my_list_panel(ds, MockList())
        soup = BeautifulSoup(html, "lxml")
        h3 = soup.find("h3")
        assert h3 is not None
        assert "My Own List" in h3.get_text()

    def test_item_without_decision_shows_unknown(self):
        from shopstack.schemas.models import ShoppingListItem

        class MockList:
            items = [
                ShoppingListItem(canonical_name="unknown_item"),
            ]

        html = dc.render_my_list_panel(_sample_ds(), MockList())
        assert "Unknown" in html


class TestDecisionCardsCadenceInsights:
    """render_cadence_insights: h3 heading, upcoming items, due-now labels."""

    def test_empty_cadence_returns_empty_string(self):
        assert dc.render_cadence_insights({}) == ""

    def test_items_outside_window_returns_empty(self):
        """Items due >3 days away should not appear."""
        from datetime import date, timedelta
        today = date(2026, 6, 10)
        cadence = {
            "onion": {
                "next_expected": today + timedelta(days=5),
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        assert html == ""

    def test_due_now_item_appears(self):
        from datetime import date, timedelta
        today = date(2026, 6, 10)
        cadence = {
            "onion": {
                "next_expected": today,
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        assert "Purchase Rhythm" in html
        assert "Onion" in html
        assert "Due now" in html

    def test_due_tomorrow_item_appears(self):
        from datetime import date, timedelta
        today = date(2026, 6, 10)
        cadence = {
            "onion": {
                "next_expected": today + timedelta(days=1),
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        assert "Due tomorrow" in html

    def test_due_in_few_days_item_appears(self):
        from datetime import date, timedelta
        today = date(2026, 6, 10)
        cadence = {
            "onion": {
                "next_expected": today + timedelta(days=2),
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        assert "Due in 2 days" in html

    def test_overdue_item_appears(self):
        from datetime import date, timedelta
        today = date(2026, 6, 10)
        cadence = {
            "onion": {
                "next_expected": today - timedelta(days=1),
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        assert "Due now" in html

    def test_heading_present_when_items_show(self):
        from datetime import date
        today = date(2026, 6, 10)
        cadence = {
            "tomato": {
                "next_expected": date(2026, 6, 11),
                "typical_qty": 0.5,
                "typical_unit": "kg",
                "avg_interval_days": 4.0,
            }
        }
        html = dc.render_cadence_insights(cadence, today)
        soup = BeautifulSoup(html, "lxml")
        heading = soup.find("h3")
        assert heading is not None
        assert "Purchase Rhythm" in heading.get_text()

    def test_multiple_items_sorted_by_urgency(self):
        from datetime import date
        today = date(2026, 6, 10)
        cadence = {
            "tomato": {
                "next_expected": date(2026, 6, 18),  # 8 days away — outside window
                "typical_qty": 0.5,
                "typical_unit": "kg",
                "avg_interval_days": 4.0,
            },
            "onion": {
                "next_expected": date(2026, 6, 11),  # 1 day away — inside window
                "typical_qty": 1.0,
                "typical_unit": "kg",
                "avg_interval_days": 7.0,
            },
            "milk": {
                "next_expected": date(2026, 6, 10),  # today — inside window
                "typical_qty": 2.0,
                "typical_unit": "L",
                "avg_interval_days": 3.0,
            },
        }
        html = dc.render_cadence_insights(cadence, today)
        # Only onion and milk should appear (tomato is >3 days away)
        assert "Onion" in html
        assert "Milk" in html
        assert "tomato" not in html or "Tomato" not in html

    def test_max_items_respected(self):
        """Only first 5 items shown."""
        from datetime import date
        today = date(2026, 6, 10)
        cadence = {
            f"item_{i}": {
                "next_expected": today,
                "typical_qty": 1.0,
                "typical_unit": "unit",
                "avg_interval_days": 7.0,
            }
            for i in range(8)
        }
        html = dc.render_cadence_insights(cadence, today)
        # Should show max 5 items (upcoming[:5])
        count = html.count("Due now")
        assert count <= 5  # max 5 items from the [:5] limit


class TestDecisionCardsConfirmation:
    def test_returns_empty_string_for_no_lots(self):
        assert dc.render_needs_confirmation([]) == ""

    def test_heading_present_with_items(self):
        from datetime import date

        class MockLot:
            display_name = "Milk"
            purchase_date = date(2026, 6, 5)

        html = dc.render_needs_confirmation([MockLot()])
        assert "Needs Confirmation" in html
        assert "Milk" in html
        assert "Last verified" in html

    def test_item_without_purchase_date(self):
        class MockLot:
            display_name = "Mystery Eggs"
            purchase_date = None

        html = dc.render_needs_confirmation([MockLot()])
        assert "Mystery Eggs" in html
        assert "No purchase date recorded" in html

    def test_max_items_respected(self):
        from datetime import date
        today = date(2026, 6, 10)

        class MockLot:
            display_name = ""
            purchase_date = today

        lots = []
        for i in range(8):
            lot = MockLot()
            lot.display_name = f"Item {i}"
            lots.append(lot)

        html = dc.render_needs_confirmation(lots)
        # Should have max 5 items
        assert "Item 0" in html
        assert "Item 4" in html
        assert "Item 5" not in html
        assert "Item 7" not in html


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.screens._utils (screen utility renderers)
# ═══════════════════════════════════════════════════════════════════════


class TestRenderHomeAdvice:
    """render_home_advice: healthy pantry, buy/skip sections, max items."""

    def test_empty_inventory_shows_healthy_pantry(self):
        html = render_home_advice([], [], [])
        assert "Today" in html or "healthy" in html or "No immediate action" in html

    def test_low_stock_item_appears_in_buy_section(self):
        class MockLot:
            status = "low"
            quantity = 0.3
            display_name = "Milk"
            canonical_name = "milk"

        html = render_home_advice([MockLot()], [], [])
        assert "Buy" in html
        assert "Milk" in html

    def test_high_quantity_skips_item(self):
        class MockLot:
            status = "active"
            quantity = 5.0
            display_name = "Rice"
            canonical_name = "rice"

        html = render_home_advice([MockLot()], [], [])
        assert "Skip" in html
        assert "Rice" in html

    def test_use_soon_item_appears_in_buy(self):
        class MockLot:
            status = "active"
            quantity = 0.8
            display_name = "Milk"
            canonical_name = "milk"

        html = render_home_advice([MockLot()], [], [{"canonical_name": "milk", "display_name": "Milk"}])
        # Milk has quantity > 0.7 but is in use_soon → no skip
        assert "Use Milk before buying more" in html or "Use" in html

    def test_use_soon_excludes_from_skip(self):
        """An item in use_soon should NOT appear in skip even if quantity > 0.7."""
        class MockLot:
            status = "active"
            quantity = 5.0
            display_name = "Milk"
            canonical_name = "milk"

        html = render_home_advice([MockLot()], [], [{"canonical_name": "milk"}])
        # Milk is in use_soon → should NOT appear in skip section
        assert "Skip" not in html

    def test_both_buy_and_skip_sections_rendered(self):
        class LowLot:
            status = "low"
            quantity = 0.2
            display_name = "Milk"
            canonical_name = "milk"

        class HighLot:
            status = "active"
            quantity = 8.0
            display_name = "Rice"
            canonical_name = "rice"

        html = render_home_advice([LowLot(), HighLot()], [], [])
        assert "Buy" in html
        assert "Skip" in html
        assert "Milk" in html
        assert "Rice" in html

    def test_max_buy_items_respected(self):
        """Buy section limited to 3 items + 2 use_soon = up to 5 buy lines."""
        class MockLot:
            status = "low"
            quantity = 0.1
            display_name = ""
            canonical_name = ""

        lots = []
        for i in range(6):
            lot = MockLot()
            lot.display_name = f"Item {i}"
            lots.append(lot)

        html = render_home_advice(lots, [], [])
        # buy[:3] limits to 3 items; count "Buy" occurrences in <li> tags
        assert html.count("<li>") <= 3

    def test_html_escaped(self):
        class MockLot:
            status = "low"
            quantity = 0.1
            display_name = "<script>"
            canonical_name = "<script>"

        html = render_home_advice([MockLot()], [], [])
        assert "&lt;script&gt;" in html
        assert "<script>" not in html


class TestRenderListSummary:
    """render_list_summary: None, empty items, items with badges, max 8."""

    def test_none_shows_no_active_list(self):
        html = render_list_summary(None)
        assert "No active list" in html

    def test_empty_items_shows_list_empty(self):
        class MockList:
            items = []
        html = render_list_summary(MockList())
        assert "empty" in html.lower()

    def test_items_rendered_with_badge(self):
        class MockItem:
            canonical_name = "milk"
            status = "active"

        class MockList:
            items = [MockItem()]

        html = render_list_summary(MockList())
        assert "milk" in html or "Milk" in html
        assert "badge" in html

    def test_heading_shows_item_count(self):
        class MockItem:
            canonical_name = "milk"
            status = "active"

        class MockList:
            items = [MockItem(), MockItem()]

        html = render_list_summary(MockList())
        assert "Shopping List" in html
        assert "2 items" in html

    def test_max_eight_items_respected(self):
        class MockItem:
            canonical_name = ""
            status = ""

        class MockList:
            items = []

        items = []
        for i in range(10):
            item = MockItem()
            item.canonical_name = f"item_{i}"
            items.append(item)

        ml = MockList()
        ml.items = items
        html = render_list_summary(ml)
        assert html.count("item_") <= 8

    def test_html_escaped(self):
        class MockItem:
            canonical_name = "<script>alert(1)</script>"
            status = "active"

        class MockList:
            items = [MockItem()]

        html = render_list_summary(MockList())
        assert "&lt;script&gt;" in html
        assert "<script>alert" not in html


class TestRenderLowStock:
    """render_low_stock: empty, items with quantities, max 5."""

    def test_empty_returns_empty_string(self):
        assert render_low_stock([]) == ""

    def test_items_rendered_with_quantity(self):
        class MockLot:
            display_name = "Milk"
            quantity = 0.5
            unit = "L"

        html = render_low_stock([MockLot()])
        assert "Milk" in html
        assert "0.5" in html
        assert "L" in html

    def test_multiple_items_all_rendered(self):
        class MockLot:
            display_name = ""
            quantity = 0.0
            unit = "unit"

        lots = []
        for i in range(3):
            lot = MockLot()
            lot.display_name = f"Item {i}"
            lot.quantity = float(i + 1) * 0.5
            lots.append(lot)

        html = render_low_stock(lots)
        assert "Item 0" in html
        assert "Item 1" in html
        assert "Item 2" in html

    def test_max_five_items_respected(self):
        class MockLot:
            display_name = ""
            quantity = 0.0
            unit = "unit"

        lots = []
        for i in range(8):
            lot = MockLot()
            lot.display_name = f"Item {i}"
            lots.append(lot)

        html = render_low_stock(lots)
        assert "Item 0" in html
        assert "Item 4" in html
        assert "Item 5" not in html

    def test_quantity_color_red(self):
        class MockLot:
            display_name = "Milk"
            quantity = 0.3
            unit = "L"

        html = render_low_stock([MockLot()])
        assert "color:var(--red)" in html or "--red" in html

    def test_html_escaped(self):
        class MockLot:
            display_name = "<script>"
            quantity = 0.1
            unit = "<unit>"

        html = render_low_stock([MockLot()])
        assert "&lt;script&gt;" in html
        assert "&lt;unit&gt;" in html


class TestRenderRecentPurchases:
    """render_recent_purchases: empty, items with prices, max 5."""

    def test_empty_returns_empty_string(self):
        assert render_recent_purchases([]) == ""

    def test_items_rendered_with_price(self):
        class MockPurchase:
            canonical_name = "Milk"
            total_price = 50.0

        html = render_recent_purchases([MockPurchase()])
        assert "Milk" in html
        assert "50" in html

    def test_multiple_items_all_rendered(self):
        class MockPurchase:
            canonical_name = ""
            total_price = 0.0

        purchases = []
        for i in range(3):
            p = MockPurchase()
            p.canonical_name = f"Item {i}"
            p.total_price = float(i + 1) * 100
            purchases.append(p)

        html = render_recent_purchases(purchases)
        assert "Item 0" in html
        assert "Item 1" in html
        assert "Item 2" in html

    def test_max_five_items_respected(self):
        class MockPurchase:
            canonical_name = ""
            total_price = 0.0

        purchases = []
        for i in range(8):
            p = MockPurchase()
            p.canonical_name = f"Item {i}"
            purchases.append(p)

        html = render_recent_purchases(purchases)
        assert "Item 0" in html
        assert "Item 4" in html
        assert "Item 5" not in html

    def test_price_formatted_rupee_symbol(self):
        class MockPurchase:
            canonical_name = "Milk"
            total_price = 50.0

        html = render_recent_purchases([MockPurchase()])
        # Unicode rupee sign \u20b9 should appear
        assert "\u20b9" in html

    def test_html_escaped(self):
        class MockPurchase:
            canonical_name = "<script>hack</script>"
            total_price = 0.0

        html = render_recent_purchases([MockPurchase()])
        assert "&lt;script&gt;" in html
        assert "<script>" not in html


# ═══════════════════════════════════════════════════════════════════════
# shopstack.ui.renderers.shopping_results
# ═══════════════════════════════════════════════════════════════════════


class TestShoppingResults:
    def test_completion_success_shows_list_completed(self):
        result = ShoppingCompletionResult(
            success=True,
            list_id="list-1",
            items_added=[CompletionItem("milk", "lot-1", 2.0, "L")],
            message="Done",
        )
        html = sr.render_shopping_completion(result)
        assert "List completed" in html
        assert "milk" in html

    def test_completion_failure_shows_error(self):
        result = ShoppingCompletionResult(
            success=False, list_id="", message="Something failed"
        )
        html = sr.render_shopping_completion(result)
        assert "Something failed" in html

    def test_completion_zero_items_shows_message(self):
        result = ShoppingCompletionResult(
            success=True, list_id="list-1", message="All done, nothing to add"
        )
        html = sr.render_shopping_completion(result)
        assert "nothing to add" in html

    def test_mark_purchased_success(self):
        result = MarkPurchasedResult(
            success=True,
            items_added=[PurchaseResultItem("milk", "lot-1", 2.0, "L")],
            message="Marked",
        )
        html = sr.render_mark_purchased(result)
        assert "Marked" in html

    def test_mark_purchased_failure(self):
        result = MarkPurchasedResult(success=False, message="Error occurred")
        html = sr.render_mark_purchased(result)
        assert "Error occurred" in html


# ═══════════════════════════════════════════════════════════════════════
# Cross-cutting: all components produce valid-ish HTML
# ═══════════════════════════════════════════════════════════════════════

class TestCrossCutting:
    """Every HTML-generating function should parse without errors."""

    def test_all_primitives_produce_valid_html(self):
        for html in [
            item_row("Test", 1, "kg"),
            stat_card("10", "Items"),
            data_table([{"a": "1"}]),
            data_table([], empty_message="Empty"),
            confirm_dialog("Sure?"),
            toast("OK"),
            empty_state_enhanced("Nothing"),
            loading_skeleton(),
        ]:
            soup = BeautifulSoup(html, "lxml")
            assert len(soup.contents) > 0

    def test_all_card_functions_produce_valid_html(self):
        for html in [
            card("Title", "body"),
            render_decision_card_html("X", "buy", "reason", 0.5),
            render_action_tile("Label", "sub", "tab"),
            render_hero_panel("Title", "sub"),
            render_metric("N", "V"),
            render_rows([("A", "1")]),
            render_workflow_rail(["A"], current_step=0),
        ]:
            soup = BeautifulSoup(html, "lxml")
            assert len(soup.contents) > 0

    def test_all_svg_functions_produce_valid_html(self):
        for html in [
            ic.render_item_card("X", 1, "kg"),
            ic.render_decision_card("X", "buy", "reason", 0.5),
            ic.render_use_soon_card([{"display_name": "X"}]),
            ic.render_shopping_summary_card(1, 0, 0),
            ic.render_price_comparison_card("X", {"A": 10}),
        ]:
            soup = BeautifulSoup(html, "lxml")
            assert len(soup.contents) > 0