"""
export_tool.py — Assemble and export caregiver data summaries.

Combines selected data (meds, appointments, food chart, and an optional
document summary) into a formatted text block ready for copy, email, or print.
"""

from __future__ import annotations

import textwrap
from datetime import datetime
from typing import Optional

from config import load_patient_config
from med_tracker import get_medications
from appointment_tracker import get_upcoming
from food_tracker import get_food
from profiles import get_profile


# ── Core assembler ────────────────────────────────────────────────────────────

def assemble_export(
    include_meds: bool = True,
    include_appointments: bool = True,
    include_food: bool = True,
    document_summary: Optional[str] = None,
    custom_note: Optional[str] = None,
    profile_id: Optional[str] = None,
) -> str:
    """
    Assemble a formatted text export block.

    Returns a multi-line string suitable for copy-to-clipboard, email body,
    or print.
    """
    cfg = load_patient_config()
    today = datetime.now().strftime("%B %d, %Y at %I:%M %p")
    profile = get_profile(profile_id) if profile_id else None
    patient_label = ""
    if profile:
        patient_label = profile.get("full_name") or profile.get("label") or ""

    lines = []

    # ── Header ──────────────────────────────────────────────────────────────
    lines.append("=" * 60)
    lines.append("  CAREGIVER SUMMARY REPORT")
    lines.append(f"  Generated: {today}")
    if patient_label:
        lines.append(f"  Patient: {patient_label}")
    elif cfg.get("patient_name"):
        lines.append(f"  Patient: {cfg['patient_name']}")
    lines.append("=" * 60)
    lines.append("")

    # ── Custom note ──────────────────────────────────────────────────────────
    if custom_note and custom_note.strip():
        lines.append("NOTES")
        lines.append("-" * 40)
        lines.append(custom_note.strip())
        lines.append("")

    # ── Medications ──────────────────────────────────────────────────────────
    if include_meds:
        meds = get_medications(filter="current", profile_id=profile_id)
        lines.append("CURRENT MEDICATIONS")
        lines.append("-" * 40)
        if meds:
            for med in meds:
                parts = [med["name"]]
                if med.get("dosage"):
                    parts.append(med["dosage"])
                if med.get("frequency"):
                    parts.append(f"({med['frequency']})")
                lines.append("• " + "  ".join(parts))
                if med.get("side_effects"):
                    lines.append(f"    ↳ Side effects: {med['side_effects']}")
                if med.get("personal_notes"):
                    lines.append(f"    ↳ Notes: {med['personal_notes']}")
        else:
            lines.append("No current medications on file.")
        lines.append("")

    # ── Appointments ─────────────────────────────────────────────────────────
    if include_appointments:
        appts = get_upcoming(profile_id=profile_id)
        lines.append("UPCOMING APPOINTMENTS")
        lines.append("-" * 40)
        if appts:
            for appt in appts:
                date_str = appt.get("date", "")
                time_str = appt.get("time", "")
                when = date_str + (f" at {time_str}" if time_str else "")
                lines.append(f"• {appt['title']} — {when}")
                if appt.get("location"):
                    lines.append(f"    Location: {appt['location']}")
                if appt.get("notes"):
                    lines.append(f"    Notes: {appt['notes']}")
        else:
            lines.append("No upcoming appointments.")
        lines.append("")

    # ── Food Chart ───────────────────────────────────────────────────────────
    if include_food:
        food_data = get_food(profile_id=profile_id)
        lines.append("FOOD CHART")
        lines.append("-" * 40)

        liked = food_data.get("liked_foods", [])
        disliked = food_data.get("disliked_foods", [])
        allergies = food_data.get("allergies", [])

        if allergies:
            lines.append("⚠  Allergies:")
            for e in allergies:
                note_part = f" ({e['notes']})" if e.get("notes") else ""
                lines.append(f"   • {e['name']}{note_part}")

        if liked:
            lines.append("✓  Liked Foods:")
            for e in liked:
                note_part = f" ({e['notes']})" if e.get("notes") else ""
                lines.append(f"   • {e['name']}{note_part}")

        if disliked:
            lines.append("✗  Disliked Foods:")
            for e in disliked:
                note_part = f" ({e['notes']})" if e.get("notes") else ""
                lines.append(f"   • {e['name']}{note_part}")

        if not allergies and not liked and not disliked:
            lines.append("No food data on file.")
        lines.append("")

    # ── Document Summary ─────────────────────────────────────────────────────
    if document_summary and document_summary.strip():
        lines.append("DOCUMENT SUMMARY")
        lines.append("-" * 40)
        # Word-wrap long lines
        for para in document_summary.strip().split("\n"):
            wrapped = textwrap.fill(para, width=58) if len(para) > 58 else para
            lines.append(wrapped)
        lines.append("")

    # ── Footer ───────────────────────────────────────────────────────────────
    lines.append("=" * 60)
    lines.append("Built for the Build Small Hackathon — Backyard AI Track")
    lines.append("All data is stored locally. Nothing leaves this device.")
    lines.append("=" * 60)

    return "\n".join(lines)


def build_mailto_link(
    to: str = "",
    subject: str = "Caregiver Summary Report",
    body: str = "",
) -> str:
    """
    Build a mailto: URL with pre-filled subject and body.
    The body is URL-encoded so it works in href attributes.
    """
    import urllib.parse
    encoded_body = urllib.parse.quote(body)
    encoded_subject = urllib.parse.quote(subject)
    return f"mailto:{to}?subject={encoded_subject}&body={encoded_body}"