#!/usr/bin/env python3
"""
Email Assistant Agent Workforce for brett@brettapps.com
Agents:
  1. Triage Agent    — read inbox, classify, prioritise
  2. Draft Agent     — compose replies, store in Obsidian drafts
  3. Summary Agent   — thread summaries, action items
  4. Archive Agent   — label, move, snooze via Obsidian filing system
"""
import json, os, re, datetime, subprocess, sys
from pathlib import Path

OBSIDIAN_VAULT = Path(os.environ.get("OBSIDIAN_VAULT", "/tmp/email_vault"))
EMAIL_DIR     = OBSIDIAN_VAULT / "Email"
for d in [EMAIL_DIR / "Inbox", EMAIL_DIR / "Drafts", EMAIL_DIR / "Sent",
          EMAIL_DIR / "Archive", EMAIL_DIR / "Templates", EMAIL_DIR / "Action_Items"]:
    d.mkdir(parents=True, exist_ok=True)

PRIORITY_RULES = [
    (r"urgent|asap|immediately|critical", "P1-Critical"),
    (r"invoice|payment|overdue|deadline", "P2-High"),
    (r"meeting|call|schedule|calendar", "P2-High"),
    (r" Brettapps|fair dinkum|trifecta|ebook|publish", "P2-High"),
    (r"newsletter|unsubscribe|no.?reply", "P4-Low"),
    (r"promo|sale|discount|limited.?time", "P5-Spam"),
]

def triage_email(subject: str, body: str, sender: str) -> dict:
    text = f"{subject} {body} {sender}".lower()
    priority = "P3-Normal"
    category = "General"
    for pattern, level in PRIORITY_RULES:
        if re.search(pattern, text, re.IGNORECASE):
            priority = level
            break
    if "hf." in text or "huggingface" in text or "space" in text:
        category = "HF Spaces"
    elif "invoice" in text or "payment" in text:
        category = "Finance"
    elif "meeting" in text or "call" in text:
        category = "Meetings"
    elif "trifecta" in text or "racing" in text:
        category = "Racing"
    elif "ebook" in text or "book" in text or "publish" in text:
        category = "Publishing"
    needs_reply = priority in ("P1-Critical", "P2-High")
    return {
        "priority": priority,
        "category": category,
        "needs_reply": needs_reply,
        "suggested_label": f"{category} / {priority}",
    }

def summarise_thread(emails: list) -> str:
    lines = [f"# Thread Summary — {datetime.date.today().isoformat()}\n"]
    lines.append(f"**Total messages:** {len(emails)}\n")
    for i, e in enumerate(emails, 1):
        lines.append(f"{i}. **{e.get('subject', '(no subject)')}** — {e.get('sender', 'unknown')} ({e.get('date', '')[:10]})")
    lines.append("\n## Action Items\n")
    action_items = []
    for e in emails:
        body = e.get("body", "")
        if re.search(r"please\s+(review|send|confirm|reply|action|update)", body, re.IGNORECASE):
            action_items.append(f"- [ ] {e.get('subject', 'Action required')} — from {e.get('sender', 'unknown')}")
    if not action_items:
        action_items = ["- [ ] Review thread for any outstanding requests"]
    lines.extend(action_items[:5])
    return "\n".join(lines)

def draft_reply(original: dict, tone: str = "professional") -> str:
    name = original.get("sender", "there").split("@")[0].replace(".", " ").title()
    templates = {
        "professional": f"""Hi {name},

Thank you for your email regarding "{original.get('subject', '')}". I've reviewed your message and will follow up shortly.

Best regards,
Brett Anthony Sjoberg""",
        "friendly": f"""Hi {name},

Thanks for reaching out! I appreciate you getting in touch about "{original.get('subject', '')}".

I'll get back to you with more details soon.

Cheers,
Brett""",
        "brief": f"""{name} — re: {original.get('subject', '')}

Acknowledged. Will follow up.

Brett""",
    }
    return templates.get(tone, templates["professional"])

def archive_email(email: dict, folder: str = "Archive") -> str:
    ts = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
    fname = f"{ts}_{email.get('id', 'email')}.md"
    target = EMAIL_DIR / folder / fname
    md = f"""# {email.get('subject', '(no subject)')}

**From:** {email.get('sender', '')}  
**Date:** {email.get('date', '')}  
**Priority:** {email.get('triage', {}).get('priority', 'P3-Normal')}  
**Category:** {email.get('triage', {}).get('category', 'General')}  
**Needs Reply:** {email.get('triage', {}).get('needs_reply', False)}  
**Stored:** {ts}

---

{email.get('body', '')}
"""
    target.write_text(md, encoding="utf-8")
    return str(target)

def build_obsidian_email_vault():
    index = f"""# Email Vault

## Brettapps Email System
**Account:** brett@brettapps.com  
**Vault Root:** {EMAIL_DIR}

## Folders

| Folder | Purpose |
|--------|---------|
| [Inbox](./Inbox) | New emails awaiting triage |
| [Drafts](./Drafts) | AI-generated reply drafts |
| [Sent](./Sent) | Emails sent |
| [Archive](./Archive) | Processed emails |
| [Templates](./Templates) | Reply templates |
| [Action_Items](./Action_Items) | Tasks extracted from emails |

## Quick Stats
- Inbox: {len(list((EMAIL_DIR/'Inbox').glob('*.md')))} files
- Drafts: {len(list((EMAIL_DIR/'Drafts').glob('*.md')))} files
- Archive: {len(list((EMAIL_DIR/'Archive').glob('*.md')))} files
"""
    (EMAIL_DIR / "README.md").write_text(index, encoding="utf-8")

def run_email_workflow(emails: list) -> dict:
    """Process a batch of emails through the workforce."""
    results = {"processed": 0, "triaged": [], "drafted": [], "archived": [], "actions": []}

    for email in emails:
        results["processed"] += 1

        # Agent 1: Triage
        triage = triage_email(email.get("subject", ""), email.get("body", ""), email.get("sender", ""))
        email["triage"] = triage
        results["triaged"].append({"id": email.get("id"), "priority": triage["priority"], "category": triage["category"]})

        # Agent 2: Draft (if needs reply)
        if triage["needs_reply"]:
            draft = draft_reply(email, tone="professional")
            ts = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
            draft_fname = f"draft_{ts}_{email.get('id', 'reply')}.md"
            draft_path = EMAIL_DIR / "Drafts" / draft_fname
            draft_md = f"""# Draft Reply — {email.get('subject', '')}

**To:** {email.get('sender', '')}  
**Subject:** Re: {email.get('subject', '')}  
**Priority:** {triage['priority']}  
**Status:** Pending review

---

{draft}
"""
            draft_path.write_text(draft_md, encoding="utf-8")
            results["drafted"].append(str(draft_path))

        # Agent 3: Summarise
        summary = summarise_thread([email])
        results["actions"].append({"id": email.get("id"), "summary": summary[:200]})

        # Agent 4: Archive
        archive_path = archive_email(email, folder="Archive")
        results["archived"].append(archive_path)

    build_obsidian_email_vault()
    return results