"""HTML fragments of the dashboard. Builders return strings (testable); `st.html` renders them.

Every value coming from the API is escaped: patient free text never reaches these views, but the API is still
treated as untrusted input.
"""

from __future__ import annotations

from html import escape

import streamlit as st

from app.api.schemas import PatientListItem
from dashboard import theme
from dashboard.components import helpers as h


def chip(text: str) -> str:
    return f'<span class="mt-chip">{escape(text)}</span>'


def badge(text: str, tone: str, tip: str = "", icon: str = "") -> str:
    tip_attr = f' data-tip="{escape(tip)}"' if tip else ""
    cls = " mt-tip" if tip else ""
    lead = f'<span class="mt-dot" style="background:{theme.TONES[tone].solid}"></span>' if icon == "dot" else icon
    return f'<span class="mt-badge t-{tone}{cls}"{tip_attr}>{lead}{escape(text)}</span>'


def bar(fraction: float | None, tone: str) -> str:
    pct = 0 if fraction is None else max(0, min(100, round(fraction * 100)))
    return f'<div class="mt-bar"><span style="width:{pct}%;background:{theme.TONES[tone].solid}"></span></div>'


def page_header(title: str, subtitle: str = "", kicker: str = "") -> str:
    k = f'<div class="mt-kicker">{escape(kicker)}</div>' if kicker else ""
    s = f'<div class="mt-sub">{subtitle}</div>' if subtitle else ""
    return f'<div class="mt-head"><div>{k}<h1>{escape(title)}</h1>{s}</div></div>'


def kpi_tiles(k: h.Kpis) -> str:
    tiles = [
        ("На сопровождении", str(k.total), "пациентов в кабинете", theme.TONES["blue"].solid),
        ("🔴 Красная зона", str(k.red), "острый сигнал — связаться сегодня", theme.TONES["red"].solid),
        ("🟡 Жёлтая зона", str(k.yellow), "врачу ≤ 24 ч или к визиту", theme.TONES["yellow"].solid),
        ("Риск прерывания терапии", str(k.high_risk), "высокий индекс (правила, не ML)", theme.TONES["red"].solid),
    ]
    body = "".join(
        f'<div class="mt-kpi" style="--kpi-accent:{accent}"><div class="lbl">{escape(lbl)}</div>'
        f'<div class="val">{val}</div><div class="hint">{escape(hint)}</div></div>'
        for lbl, val, hint, accent in tiles
    )
    return f'<div class="mt-kpis">{body}</div>'


LIST_COLUMNS = ["Пациент", "Терапия", "PHQ-9", "PCL-5", "Приём 7 дн.", "Риск прерывания", "Последнее событие", "Алерты"]


def list_header() -> str:
    return '<div class="mt-cols">' + "".join(f"<div>{c}</div>" for c in LIST_COLUMNS) + "</div>"


def _score(value: int | None, trend: str) -> str:
    if value is None:
        return '<span class="mt-dim">—</span>'
    t = h.trend_view(trend)
    return (
        f'<span class="mt-num">{value}</span> '
        f'<span class="mt-tip" data-tip="{escape(t.hint)}" style="color:{theme.TONES[t.tone].ink};font-weight:700">'
        f"{t.text}</span>"
    )


def patient_row(p: PatientListItem) -> str:
    """One row of the patient list; the grid matches `list_header()`."""
    status = h.status_view(p.status_color)
    tone = theme.TONES[status.tone]
    chips = "".join(chip(h.MODULE_LABELS.get(m, m)) for m in p.modules)
    adh = h.adherence_view(p.adherence_7d)
    risk = h.risk_view(p.discontinuation_risk)
    if p.open_alerts:
        count_style = f"background:{tone.tint};color:{tone.ink}"
    else:
        count_style = f"background:{theme.TONES['grey'].tint};color:{theme.INK_3}"
    return (
        '<div class="mt-row">'
        f'<div><div class="mt-name"><span class="mt-dot mt-tip" data-tip="{escape(status.text + " — " + status.hint)}"'
        f' style="background:{tone.solid}"></span>{escape(p.display_name)}</div>'
        f'<div class="mt-meta">{h.age_label(p.age)} · {chips}</div></div>'
        f'<div>{escape(p.drug or "—")}<div class="mt-meta">день терапии {p.therapy_day}</div></div>'
        f"<div>{_score(p.phq9_last, p.trend)}</div>"
        f"<div>{_score(p.pcl5_last, p.trend)}</div>"
        f'<div><span class="mt-num">{adh.text}</span>{bar(p.adherence_7d, adh.tone)}</div>'
        f"<div>{badge(risk.text, risk.tone, risk.hint)}</div>"
        f'<div class="mt-event">{escape(p.last_event or "—")}</div>'
        f'<div><span class="mt-count" style="{count_style}">{p.open_alerts}</span></div>'
        "</div>"
    )


def banner(html_body: str, tone: str = "red", pulse: bool = False) -> str:
    lead = '<span class="mt-pulse"></span>' if pulse else ""
    return f'<div class="mt-banner t-{tone}">{lead}<div>{html_body}</div></div>'


def footer() -> None:
    st.html(
        '<div class="mt-footer">Прототип на синтетических данных · MedITron · '
        "ИИ не ставит диагнозы и не назначает лечение — решения принимает врач</div>"
    )