"""Builds the actual email/SMS/console message bodies for an alert. Kept
separate from alert_service.py's dispatch loop so the message format can be
tested in isolation.
"""

from __future__ import annotations

from app.core.config import Settings
from app.models.alert import Alert
from app.models.company import Company
from app.models.enums import NotificationType
from app.notifications.base import NotificationMessage


def build_alert_message(
    notification_type: NotificationType,
    destination_value: str,
    company: Company,
    alert: Alert,
    settings: Settings,
) -> NotificationMessage:
    dashboard_link = f"{settings.frontend_url}/alerts"

    if notification_type == NotificationType.SMS:
        text = (
            f"CI Alert [{alert.severity.value.upper()}]: {alert.title}. "
            f"Confidence {alert.confidence:.0%}. View details: {dashboard_link}"
        )
        return NotificationMessage(
            destination_value=destination_value, subject=alert.title, body_text=text[:480]
        )

    subject = f"[{alert.severity.value.upper()}] {company.name}: {alert.title}"
    text_lines = [
        f"Company: {company.name}",
        f"Alert: {alert.title}",
        f"Severity: {alert.severity.value.title()}",
        f"Confidence: {alert.confidence:.0%}",
        "",
        "What changed:",
        alert.summary,
        "",
        "Why it matters:",
        alert.why_it_matters,
        "",
        f"View in dashboard: {dashboard_link}",
        f"Manage notification preferences: {settings.frontend_url}/settings",
    ]
    body_text = "\n".join(text_lines)

    body_html = (
        f"<h2>{subject}</h2>"
        f"<p><strong>Company:</strong> {company.name}<br>"
        f"<strong>Severity:</strong> {alert.severity.value.title()}<br>"
        f"<strong>Confidence:</strong> {alert.confidence:.0%}</p>"
        f"<p><strong>What changed:</strong><br>{alert.summary}</p>"
        f"<p><strong>Why it matters:</strong><br>{alert.why_it_matters}</p>"
        f'<p><a href="{dashboard_link}">View in dashboard</a></p>'
        f'<p style="color:#666;font-size:12px">'
        f'<a href="{settings.frontend_url}/settings">Manage notification preferences</a></p>'
    )

    return NotificationMessage(
        destination_value=destination_value,
        subject=subject,
        body_text=body_text,
        body_html=body_html,
    )