# -*- coding: utf-8 -*-
import logging

_logger = logging.getLogger(__name__)


# l10n_ca account codes that collide with the Nexa CoA design and that
# l10n_ca pre-loads with 'income_other'/'expense'/etc. types we don't want.
# Each of these is checked at pre_init: if it has zero postings we suffix
# its code with '.OLD' and archive it so our XML can claim the code.
# Codes with postings are LEFT ALONE — we renumbered the Nexa code instead
# (115100 stays as l10n_ca 'Customers Account' AR; Nexa shareholder receivable
# moved to 119100. 511100 stays as l10n_ca 'Inside Purchases'; Nexa Cloud
# Infrastructure moved to 511105).
_L10N_CA_COLLISION_CODES = [
    "118100", "118200", "118300",
    "213100", "214100",
    "221200",
    "311100", "311200", "311300",
    "411100", "411200", "411300",
    "413100", "413200", "413300",
    "511110", "511120", "511130", "511140", "511200", "511210",
    "512100", "512110", "512200",
    "611100", "611200", "611300",
    "612100", "612200",
]


def pre_init_hook(env):
    """Run BEFORE XML data is loaded. Clear l10n_ca account codes that would
    collide with Nexa's chart of accounts."""
    _logger.info("nexa_coa_setup: pre_init_hook starting")
    _clear_l10n_ca_collisions(env)
    _logger.info("nexa_coa_setup: pre_init_hook complete")


def _clear_l10n_ca_collisions(env):
    """For each colliding code: if it has zero postings, rename to NNNNNN.OLD
    and set inactive. If it has postings, leave alone (Nexa code was renumbered
    in the XML to avoid the conflict)."""
    cleared = 0
    kept_with_postings = 0
    not_found = 0
    for code in _L10N_CA_COLLISION_CODES:
        acc = env["account.account"].search([("code", "=", code)], limit=1)
        if not acc:
            not_found += 1
            continue
        usage = env["account.move.line"].search_count([("account_id", "=", acc.id)])
        if usage > 0:
            _logger.info(
                "nexa_coa_setup: keeping l10n_ca account %s (%s) — %d postings exist",
                code, acc.name, usage,
            )
            kept_with_postings += 1
            continue
        new_code = f"{code}.OLD"
        # Skip if already suffixed (idempotency)
        if acc.code.endswith(".OLD"):
            continue
        acc.write({
            "code": new_code,
            "name": f"(l10n_ca LEGACY) {acc.name or acc.display_name}",
            "active": False,
        })
        cleared += 1
    _logger.info(
        "nexa_coa_setup: collision sweep — cleared %d, kept-with-postings %d, not-found %d",
        cleared, kept_with_postings, not_found,
    )


def post_init_hook(env):
    """Imperative one-shot operations after module data is loaded.

    Each helper is idempotent — safe to re-run on -u.
    """
    _logger.info("nexa_coa_setup: post_init_hook starting")
    _normalize_company_hst_number(env)
    _archive_unused_l10n_ca_accounts(env)
    _rename_legacy_accounts(env)
    _lock_fiscal_year_2025(env)
    _logger.info("nexa_coa_setup: post_init_hook complete")


def _normalize_company_hst_number(env):
    """Convert '741224877' to '741224877 RT0001' if not already in full form."""
    company = env.ref("base.main_company", raise_if_not_found=False)
    if not company:
        return
    vat = (company.partner_id.vat or "").strip()
    if vat == "741224877":
        company.partner_id.vat = "741224877 RT0001"
        _logger.info("nexa_coa_setup: normalized HST# to '741224877 RT0001'")


def _archive_unused_l10n_ca_accounts(env):
    """Stub — filled in Phase 4. Archives ~370 unused accounts."""
    pass


def _rename_legacy_accounts(env):
    """Stub — filled in Phase 4. Renames the 14xx/15xx legacy accounts."""
    pass


def _lock_fiscal_year_2025(env):
    """Try to set fiscalyear_lock_date = 2025-12-31 on main company.

    If Odoo blocks the lock because unreconciled bank statement lines or other
    open items exist in the period, log a clear warning and continue. The user
    can set the lock manually via Accounting > Configuration > Settings > Lock
    Dates once those items are cleaned up.
    """
    from datetime import date
    from odoo.exceptions import RedirectWarning, UserError, ValidationError
    company = env.ref("base.main_company", raise_if_not_found=False)
    if not company:
        return
    target = date(2025, 12, 31)
    if company.fiscalyear_lock_date and company.fiscalyear_lock_date >= target:
        _logger.info("nexa_coa_setup: fiscalyear_lock_date already at or after 2025-12-31")
        return
    try:
        company.fiscalyear_lock_date = target
        _logger.info("nexa_coa_setup: fiscalyear_lock_date set to 2025-12-31")
    except (RedirectWarning, UserError, ValidationError) as exc:
        _logger.warning(
            "nexa_coa_setup: could not auto-lock fiscal year 2025-12-31. "
            "Reason: %s. Set the lock manually via Accounting > Configuration > "
            "Settings > Lock Dates after the unreconciled items in the period "
            "are cleaned up.",
            exc,
        )