"""Fusion-engine-routed AI tools for customer follow-ups.

These tools are exposed through TOOL_DISPATCH and let the assistant query
the customer follow-up engine via natural language. All tools degrade
gracefully when fusion_accounting_followup is not installed.
"""

import logging

_logger = logging.getLogger(__name__)


def fusion_list_overdue(env, params):
    """List partners with overdue invoices, sorted by risk."""
    if 'fusion.followup.engine' not in env.registry:
        return {'error': 'fusion_accounting_followup not installed'}
    from ..data_adapters import get_adapter
    adapter = get_adapter(env, 'followup')
    return adapter.list_overdue(
        status=params.get('status'),
        limit=int(params.get('limit', 50)),
        company_id=int(params['company_id'])
            if params.get('company_id') else env.company.id,
    )


def fusion_get_partner_followup_detail(env, params):
    """Detailed follow-up state for a single partner: aging, risk, history."""
    if 'fusion.followup.engine' not in env.registry:
        return {'error': 'fusion_accounting_followup not installed'}
    Partner = env['res.partner']
    partner = Partner.browse(int(params['partner_id']))
    if not partner.exists():
        return {'error': 'Partner not found'}
    engine = env['fusion.followup.engine']
    overdue = engine.get_overdue_for_partner(partner)
    history = engine.snapshot_followup_history(partner, limit=10)
    return {
        'partner_id': partner.id,
        'partner_name': partner.name,
        'overdue': overdue,
        'history': history,
    }


def fusion_generate_followup_text(env, params):
    """Generate (or fall back to template) follow-up subject + body."""
    if 'fusion.followup.engine' not in env.registry:
        return {'error': 'fusion_accounting_followup not installed'}
    from odoo.addons.fusion_accounting_followup.services.followup_text_generator import (
        generate_followup_text,
    )
    return generate_followup_text(
        env,
        partner_name=params.get('partner_name', ''),
        total_overdue=float(params.get('total_overdue', 0)),
        currency_code=params.get('currency_code', 'USD'),
        longest_overdue_days=int(params.get('longest_overdue_days', 0)),
        tone=params.get('tone', 'gentle'),
        invoice_count=int(params.get('invoice_count', 0)),
    )


def fusion_send_followup(env, params):
    """Send a follow-up email via the engine (creates a fusion.followup.run)."""
    if 'fusion.followup.engine' not in env.registry:
        return {'error': 'fusion_accounting_followup not installed'}
    from ..data_adapters import get_adapter
    adapter = get_adapter(env, 'followup')
    return adapter.send_followup(
        partner_id=int(params['partner_id']),
        level_id=int(params['level_id']) if params.get('level_id') else None,
        force=bool(params.get('force', False)),
    )


def fusion_get_partner_risk_score(env, params):
    """Compute and return the payment-risk score + drivers for a partner."""
    if 'fusion.followup.engine' not in env.registry:
        return {'error': 'fusion_accounting_followup not installed'}
    partner = env['res.partner'].browse(int(params['partner_id']))
    if not partner.exists():
        return {'error': 'Partner not found'}
    overdue = env['fusion.followup.engine'].get_overdue_for_partner(partner)
    return {
        'partner_id': partner.id,
        'partner_name': partner.name,
        'risk': overdue['risk'],
    }


TOOLS = {
    'fusion_list_overdue': fusion_list_overdue,
    'fusion_get_partner_followup_detail': fusion_get_partner_followup_detail,
    'fusion_generate_followup_text': fusion_generate_followup_text,
    'fusion_send_followup': fusion_send_followup,
    'fusion_get_partner_risk_score': fusion_get_partner_risk_score,
}