"""
Seed default notification templates for SMS and Email channels.
Templates are company-level (not per-merchant).

Usage:
    python -m scripts.seed_templates
    python -m scripts.seed_templates --mongodb-uri mongodb://prod-host:27017

Templates seeded:
  - cust_otp            (customer OTP)
  - staff_otp_login     (staff OTP)
  - otp_verification    (generic / service partner OTP)
  - welcome_credentials (employee & merchant welcome password)
  - password_reset      (password reset)
  - password_reset_link (password reset with link)
"""
import asyncio
import argparse
import uuid
import sys
import os
from datetime import datetime

# Allow running from project root
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

from motor.motor_asyncio import AsyncIOMotorClient

COLLECTION = "notification_templates"

# ── Template definitions ─────────────────────────────────────────────────────

TEMPLATES = [
    # ── Customer OTP ─────────────────────────────────────────────────────
    {
        "channel": "sms",
        "name": "cust_otp",
        "subject": None,
        "body": "{{otp}} is your verification code. Valid for {{expiry_minutes}} minutes. Do not share this code with anyone.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["otp", "expiry_minutes"],
    },
    {
        "channel": "email",
        "name": "cust_otp",
        "subject": "Your verification code - {{otp}}",
        "body": "Your verification code is {{otp}}. It is valid for {{expiry_minutes}} minutes. Do not share this code with anyone.",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:480px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>Verification Code</h2>"
            "<p>Your verification code is:</p>"
            "<div style='font-size:32px;font-weight:bold;letter-spacing:6px;padding:16px;background:#f5f5f5;text-align:center;border-radius:8px'>{{otp}}</div>"
            "<p style='color:#666;font-size:13px'>Valid for {{expiry_minutes}} minutes. Do not share this code.</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["otp", "expiry_minutes"],
    },

    # ── Staff OTP ────────────────────────────────────────────────────────
    {
        "channel": "sms",
        "name": "staff_otp_login",
        "subject": None,
        "body": "{{otp}} is your staff login OTP. Valid for {{expiry_minutes}} minutes. Do not share.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["otp", "expiry_minutes"],
    },
    {
        "channel": "email",
        "name": "staff_otp_login",
        "subject": "Staff Login OTP - {{otp}}",
        "body": "Your staff login OTP is {{otp}}. It is valid for {{expiry_minutes}} minutes.",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:480px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>Staff Login OTP</h2>"
            "<p>Your one-time password for staff login:</p>"
            "<div style='font-size:32px;font-weight:bold;letter-spacing:6px;padding:16px;background:#f5f5f5;text-align:center;border-radius:8px'>{{otp}}</div>"
            "<p style='color:#666;font-size:13px'>Valid for {{expiry_minutes}} minutes.</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["otp", "expiry_minutes"],
    },

    # ── Generic / Service Partner OTP ────────────────────────────────────
    {
        "channel": "sms",
        "name": "otp",
        "subject": None,
        "body": "{{otp}} is your OTP. Valid for {{expiry_minutes}} minutes. Do not share this code.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["otp", "expiry_minutes"],
    },
    {
        "channel": "email",
        "name": "otp",
        "subject": "Your OTP - {{otp}}",
        "body": "Your OTP is {{otp}}. It is valid for {{expiry_minutes}} minutes. Do not share this code with anyone.",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:480px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>OTP Verification</h2>"
            "<p>Your one-time password:</p>"
            "<div style='font-size:32px;font-weight:bold;letter-spacing:6px;padding:16px;background:#f5f5f5;text-align:center;border-radius:8px'>{{otp}}</div>"
            "<p style='color:#666;font-size:13px'>Valid for {{expiry_minutes}} minutes.</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["otp", "expiry_minutes"],
    },

    # ── Welcome Credentials (Employee / Merchant) ────────────────────────
    {
        "channel": "sms",
        "name": "welcome_credentials",
        "subject": None,
        "body": "Welcome {{name}}! Your login: Username: {{username}}, Password: {{password}}. Please change your password after first login.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["name", "username", "password", "merchant_name"],
    },
    {
        "channel": "email",
        "name": "welcome_credentials",
        "subject": "Welcome {{name}} - Your Login Credentials",
        "body": "Hi {{name}},\n\nYour account has been created.\n\nUsername: {{username}}\nPassword: {{password}}\n\nPlease change your password after your first login.\n\nRegards,\n{{merchant_name}}",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:520px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>Welcome, {{name}}!</h2>"
            "<p>Your account has been created. Here are your login credentials:</p>"
            "<table style='width:100%;border-collapse:collapse;margin:16px 0'>"
            "<tr><td style='padding:8px 12px;background:#f5f5f5;font-weight:bold;width:120px'>Username</td><td style='padding:8px 12px;background:#f5f5f5'>{{username}}</td></tr>"
            "<tr><td style='padding:8px 12px;font-weight:bold'>Password</td><td style='padding:8px 12px'>{{password}}</td></tr>"
            "</table>"
            "<p style='color:#c00;font-size:13px'>Please change your password after your first login.</p>"
            "<p style='color:#999;font-size:12px'>{{merchant_name}}</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["name", "username", "password", "merchant_name"],
    },

    # ── Password Reset ───────────────────────────────────────────────────
    {
        "channel": "sms",
        "name": "password_reset",
        "subject": None,
        "body": "Hi {{name}}, your password has been reset. New password: {{new_password}}. Please change it after login.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["name", "new_password", "merchant_name"],
    },
    {
        "channel": "email",
        "name": "password_reset",
        "subject": "Password Reset - Action Required",
        "body": "Hi {{name}},\n\nYour password has been reset.\n\nNew password: {{new_password}}\n\nPlease change it immediately after login.\n\nRegards,\n{{merchant_name}}",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:520px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>Password Reset</h2>"
            "<p>Hi {{name}}, your password has been reset.</p>"
            "<table style='width:100%;border-collapse:collapse;margin:16px 0'>"
            "<tr><td style='padding:8px 12px;background:#f5f5f5;font-weight:bold;width:140px'>New Password</td><td style='padding:8px 12px;background:#f5f5f5'>{{new_password}}</td></tr>"
            "</table>"
            "<p style='color:#c00;font-size:13px'>Please change your password immediately after login.</p>"
            "<p style='color:#999;font-size:12px'>{{merchant_name}}</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["name", "new_password", "merchant_name"],
    },

    # ── Password Reset Link ──────────────────────────────────────────────
    {
        "channel": "sms",
        "name": "password_reset_link",
        "subject": None,
        "body": "Hi {{name}}, reset your password here: {{reset_link}}. Link expires in 60 minutes.",
        "html_body": None,
        "dlt_template_id": "",
        "variables": ["name", "reset_link", "merchant_name"],
    },
    {
        "channel": "email",
        "name": "password_reset_link",
        "subject": "Reset Your Password",
        "body": "Hi {{name}},\n\nClick the link below to reset your password:\n{{reset_link}}\n\nThis link expires in 60 minutes.\n\nIf you did not request this, please ignore this email.\n\nRegards,\n{{merchant_name}}",
        "html_body": (
            "<div style='font-family:sans-serif;max-width:520px;margin:auto;padding:24px'>"
            "<h2 style='color:#333'>Reset Your Password</h2>"
            "<p>Hi {{name}},</p>"
            "<p>Click the button below to reset your password:</p>"
            "<p style='text-align:center;margin:24px 0'>"
            "<a href='{{reset_link}}' style='background:#2563eb;color:#fff;padding:12px 32px;border-radius:6px;text-decoration:none;font-weight:bold'>Reset Password</a>"
            "</p>"
            "<p style='color:#666;font-size:13px'>This link expires in 60 minutes. If you did not request this, ignore this email.</p>"
            "<p style='color:#999;font-size:12px'>{{merchant_name}}</p>"
            "</div>"
        ),
        "dlt_template_id": None,
        "variables": ["name", "reset_link", "merchant_name"],
    },
]


# ── Main ─────────────────────────────────────────────────────────────────────

async def main(mongodb_uri: str, db_name: str):
    """Connect to MongoDB and upsert company-level seed templates."""
    client = AsyncIOMotorClient(mongodb_uri)
    db = client[db_name]
    col = db[COLLECTION]

    # Ensure unique index on (channel, name) — company-level
    await col.create_index(
        [("channel", 1), ("name", 1)],
        unique=True,
        name="ux_channel_name",
    )

    created = 0
    skipped = 0
    now = datetime.utcnow()

    for tpl in TEMPLATES:
        filt = {"channel": tpl["channel"], "name": tpl["name"]}
        existing = await col.find_one(filt, {"_id": 1})
        if existing:
            print(f"  SKIP  {tpl['channel']:5s}  {tpl['name']}  (already exists)")
            skipped += 1
            continue

        doc = {
            "template_id": str(uuid.uuid4()),
            "channel": tpl["channel"],
            "name": tpl["name"],
            "subject": tpl.get("subject"),
            "body": tpl["body"],
            "html_body": tpl.get("html_body"),
            "dlt_template_id": tpl.get("dlt_template_id"),
            "variables": tpl.get("variables", []),
            "status": "active",
            "created_by": "seed_script",
            "created_at": now,
            "updated_by": None,
            "updated_at": None,
        }
        await col.insert_one(doc)
        print(f"  NEW   {tpl['channel']:5s}  {tpl['name']}  → {doc['template_id']}")
        created += 1

    print(f"\nDone — created: {created}, skipped: {skipped}, total templates: {len(TEMPLATES)}")
    client.close()


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Seed default notification templates (company-level)")
    parser.add_argument(
        "--mongodb-uri",
        default=os.getenv("MONGODB_URI", "mongodb://localhost:27017"),
        help="MongoDB connection URI (default: $MONGODB_URI or localhost)",
    )
    parser.add_argument(
        "--db-name",
        default=os.getenv("MONGODB_DB_NAME", "cuatrolabs"),
        help="MongoDB database name (default: $MONGODB_DB_NAME or cuatrolabs)",
    )
    args = parser.parse_args()

    print(f"Seeding company-level notification templates")
    print(f"MongoDB: {args.mongodb_uri} / {args.db_name}\n")

    asyncio.run(main(args.mongodb_uri, args.db_name))