import logging
from odoo import fields

_logger = logging.getLogger(__name__)


def get_close_checklist(env, params):
    from .bank_reconciliation import get_unreconciled_bank_lines
    from .journal_review import find_draft_entries, find_sequence_gaps
    from .hst_management import calculate_hst_balance

    period = params.get('period', str(fields.Date.today())[:7])
    date_from = f'{period}-01'
    import calendar
    year, month = int(period[:4]), int(period[5:7])
    last_day = calendar.monthrange(year, month)[1]
    date_to = f'{period}-{last_day:02d}'

    p = {'date_from': date_from, 'date_to': date_to}

    bank = get_unreconciled_bank_lines(env, p)
    drafts = find_draft_entries(env, {'min_age_days': '0'})
    gaps = find_sequence_gaps(env, p)
    hst = calculate_hst_balance(env, p)

    checklist = [
        {'item': 'Bank Reconciliation', 'status': 'ok' if bank['count'] == 0 else 'attention', 'detail': f"{bank['count']} unreconciled lines"},
        {'item': 'Draft Entries', 'status': 'ok' if drafts['count'] == 0 else 'attention', 'detail': f"{drafts['count']} draft entries"},
        {'item': 'Sequence Gaps', 'status': 'ok' if gaps['count'] == 0 else 'warning', 'detail': f"{gaps['count']} gaps found"},
        {'item': 'HST Balance', 'status': 'info', 'detail': f"Net HST: ${hst['net_hst']:.2f}"},
    ]
    return {'period': period, 'checklist': checklist}


def get_unreconciled_counts(env, params):
    accounts = env['account.account'].search([
        ('reconcile', '=', True),
        ('company_ids', 'in', env.company.id),
    ])
    result = []
    for acct in accounts:
        count = env['account.move.line'].search_count([
            ('account_id', '=', acct.id),
            ('reconciled', '=', False),
            ('parent_state', '=', 'posted'),
        ])
        if count > 0:
            result.append({
                'account_id': acct.id,
                'code': acct.code,
                'name': acct.name,
                'unreconciled_count': count,
            })
    return {'accounts': sorted(result, key=lambda x: -x['unreconciled_count'])}


def find_entries_in_locked_period(env, params):
    company = env.company
    lock_date = company.fiscalyear_lock_date
    if not lock_date:
        return {'status': 'no_lock_date', 'entries': []}
    entries = env['account.move'].search([
        ('date', '<=', lock_date),
        ('state', '=', 'draft'),
        ('company_id', '=', company.id),
    ])
    return {
        'lock_date': str(lock_date),
        'count': len(entries),
        'entries': [{'id': e.id, 'name': e.name, 'date': str(e.date)} for e in entries[:20]],
    }


def get_accrual_status(env, params):
    accrual_codes = params.get('account_codes', ['2100', '2110', '2120'])
    result = []
    for code in accrual_codes:
        accounts = env['account.account'].search([
            ('code', '=like', f'{code}%'),
            ('company_ids', 'in', env.company.id),
        ])
        for acct in accounts:
            balance = sum(env['account.move.line'].search([
                ('account_id', '=', acct.id),
                ('parent_state', '=', 'posted'),
            ]).mapped('balance'))
            result.append({'code': acct.code, 'name': acct.name, 'balance': balance})
    return {'accruals': result}


def run_hash_integrity_check(env, params):
    try:
        result = env.company._check_hash_integrity()
        return {
            'status': 'completed',
            'results': result.get('results', []),
            'printing_date': result.get('printing_date', ''),
        }
    except Exception as e:
        return {'error': str(e)}


def get_period_summary(env, params):
    date_from = params.get('date_from')
    date_to = params.get('date_to')
    try:
        report = env.ref('account_reports.trial_balance_report')
    except Exception:
        report = env.ref('account.trial_balance_report', raise_if_not_found=False)
    if not report:
        return {'error': 'Trial balance report not found'}
    options = report.get_options({'date': {'date_from': date_from, 'date_to': date_to}})
    lines = report._get_lines(options)
    return {
        'period': f'{date_from} to {date_to}',
        'lines': [{
            'name': l.get('name', ''),
            'columns': [c.get('no_format', c.get('name', '')) for c in l.get('columns', [])],
        } for l in lines[:100]],
    }


TOOLS = {
    'get_close_checklist': get_close_checklist,
    'get_unreconciled_counts': get_unreconciled_counts,
    'find_entries_in_locked_period': find_entries_in_locked_period,
    'get_accrual_status': get_accrual_status,
    'run_hash_integrity_check': run_hash_integrity_check,
    'get_period_summary': get_period_summary,
}