# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)
# Part of the Fusion Plating product family.

"""Shared Unit-of-Measure selection list for plating chemistry, physical
quantities, and process inputs.

Free-text unit fields invite typos ("kgs", "Kg", "kilo", "KG") that
break filters, reports, and trend graphs. Every UoM in the plating
domain — chemistry, mass, volume, length, area, electrical, time,
pressure, dimensionless — lives here as a curated selection so users
pick from a known list instead of typing.

Re-use:
    from .._fp_uom_selection import FP_UOM_SELECTION, FP_UOM_LEGACY_MAP

    uom = fields.Selection(FP_UOM_SELECTION, string='Unit')

Migration:
    Use FP_UOM_LEGACY_MAP to translate pre-existing free-text values
    into selection keys during post_init / migration. Anything not in
    the map gets cleared (NULL) so the user is forced to pick.
"""

# Single source of truth — keep alphabetised within each section.
FP_UOM_SELECTION = [
    # --- Concentration / chemistry ---------------------------------------
    ('g_l', 'g/L'),
    ('mg_l', 'mg/L'),
    ('ug_l', 'µg/L'),
    ('kg_l', 'kg/L'),
    ('oz_gal', 'oz/gal (US)'),
    ('oz_gal_imp', 'oz/Imp gal'),
    ('ml_l', 'mL/L'),
    ('mol_l', 'mol/L'),
    ('n', 'N (Normality)'),
    ('ppm', 'ppm'),
    ('ppb', 'ppb'),
    ('pct', '%'),
    ('pct_w', '% (w/w)'),
    ('pct_v', '% (v/v)'),
    ('pct_vw', '% (v/w)'),

    # --- Temperature -----------------------------------------------------
    ('c', '°C'),
    ('f', '°F'),
    ('k', 'K'),

    # --- Dimensionless / pH / specific units -----------------------------
    ('ph', 'pH'),
    ('su', 'SU (Standard Units)'),
    ('ratio', 'Ratio (e.g. 5:1)'),
    ('none', '— (none)'),

    # --- Conductivity / turbidity ----------------------------------------
    ('us_cm', 'µS/cm'),
    ('ms_cm', 'mS/cm'),
    ('ntu', 'NTU'),

    # --- Time ------------------------------------------------------------
    ('s', 's (seconds)'),
    ('min', 'min'),
    ('h', 'h'),
    ('day', 'day'),

    # --- Mass ------------------------------------------------------------
    ('mg', 'mg'),
    ('g', 'g'),
    ('kg', 'kg'),
    ('t', 't (tonne)'),
    ('oz', 'oz'),
    ('lb', 'lb'),

    # --- Volume ----------------------------------------------------------
    ('ml', 'mL'),
    ('l', 'L'),
    ('m3', 'm³'),
    ('gal_us', 'US gal'),
    ('gal_imp', 'Imp gal'),
    ('ft3', 'ft³'),

    # --- Length / thickness ----------------------------------------------
    ('nm', 'nm'),
    ('um', 'µm'),
    ('mm', 'mm'),
    ('cm', 'cm'),
    ('m', 'm'),
    ('mil', 'mil (0.001 in)'),
    ('in', 'in'),
    ('ft', 'ft'),

    # --- Area ------------------------------------------------------------
    ('cm2', 'cm²'),
    ('m2', 'm²'),
    ('in2', 'in²'),
    ('ft2', 'ft²'),
    ('dm2', 'dm²'),

    # --- Electrical / current density ------------------------------------
    ('a', 'A'),
    ('ma', 'mA'),
    ('v', 'V'),
    ('asd_a_dm2', 'A/dm² (ASD)'),
    ('asd_a_ft2', 'A/ft² (ASF)'),
    ('dm2_l', 'dm²/L (load)'),

    # --- Pressure --------------------------------------------------------
    ('pa', 'Pa'),
    ('kpa', 'kPa'),
    ('bar', 'bar'),
    ('psi', 'psi'),
    ('mmhg', 'mmHg'),

    # --- Rate / flow / generation ----------------------------------------
    ('kg_day', 'kg/day'),
    ('l_day', 'L/day'),
    ('kg_month', 'kg/month'),
    ('l_min', 'L/min'),
    ('gpm', 'gpm'),
    ('cfm', 'cfm'),

    # --- Exposure / occupational hygiene ---------------------------------
    ('mg_m3', 'mg/m³'),
    ('ug_m3', 'µg/m³'),
    ('dba', 'dBA'),
    ('lux', 'lux'),

    # --- Plating-specific counts -----------------------------------------
    ('mto', 'MTO (metal turnover)'),
    ('cycles', 'cycles'),
    ('count', 'count'),
    ('each', 'each'),
    ('rpm', 'rpm'),
]


# Map free-text values produced before this list existed → selection keys.
# Keep keys lower-cased + stripped during lookup.
FP_UOM_LEGACY_MAP = {
    # Concentration
    'g/l': 'g_l',
    'gpl': 'g_l',
    'grams/l': 'g_l',
    'g per l': 'g_l',
    'mg/l': 'mg_l',
    'ug/l': 'ug_l',
    'µg/l': 'ug_l',
    'kg/l': 'kg_l',
    'oz/gal': 'oz_gal',
    'oz/g': 'oz_gal',
    'oz/gallon': 'oz_gal',
    'oz/imp gal': 'oz_gal_imp',
    'ml/l': 'ml_l',
    'mol/l': 'mol_l',
    'molar': 'mol_l',
    'm': 'mol_l',
    'n': 'n',
    'normal': 'n',
    'normality': 'n',
    'ppm': 'ppm',
    'ppb': 'ppb',
    '%': 'pct',
    'percent': 'pct',
    'pct': 'pct',
    '% w/w': 'pct_w',
    '%(w/w)': 'pct_w',
    '%w/w': 'pct_w',
    '% v/v': 'pct_v',
    '%v/v': 'pct_v',
    '% v/w': 'pct_vw',

    # Temperature
    'c': 'c',
    '°c': 'c',
    'celsius': 'c',
    'deg c': 'c',
    'degc': 'c',
    'f': 'f',
    '°f': 'f',
    'fahrenheit': 'f',
    'deg f': 'f',
    'degf': 'f',
    'k': 'k',
    'kelvin': 'k',

    # Dimensionless
    'ph': 'ph',
    'su': 'su',
    'standard units': 'su',
    'ratio': 'ratio',
    '-': 'none',
    'none': 'none',

    # Conductivity / turbidity
    'us/cm': 'us_cm',
    'µs/cm': 'us_cm',
    'ms/cm': 'ms_cm',
    'ntu': 'ntu',

    # Time
    'second': 's',
    'seconds': 's',
    'sec': 's',
    'secs': 's',
    's': 's',
    'minute': 'min',
    'minutes': 'min',
    'min': 'min',
    'mins': 'min',
    'hour': 'h',
    'hours': 'h',
    'hr': 'h',
    'hrs': 'h',
    'h': 'h',
    'day': 'day',
    'days': 'day',
    'd': 'day',

    # Mass
    'mg': 'mg',
    'g': 'g',
    'gr': 'g',
    'gram': 'g',
    'grams': 'g',
    'kg': 'kg',
    'kgs': 'kg',
    'kilogram': 'kg',
    'kilograms': 'kg',
    't': 't',
    'tonne': 't',
    'tonnes': 't',
    'metric ton': 't',
    'oz': 'oz',
    'ounce': 'oz',
    'ounces': 'oz',
    'lb': 'lb',
    'lbs': 'lb',
    'pound': 'lb',
    'pounds': 'lb',

    # Volume
    'ml': 'ml',
    'l': 'l',
    'liter': 'l',
    'liters': 'l',
    'litre': 'l',
    'litres': 'l',
    'm3': 'm3',
    'm³': 'm3',
    'cubic meter': 'm3',
    'gal': 'gal_us',
    'gal_us': 'gal_us',
    'us gal': 'gal_us',
    'gallon': 'gal_us',
    'gallons': 'gal_us',
    'imp gal': 'gal_imp',
    'imperial gallon': 'gal_imp',
    'ft3': 'ft3',
    'ft³': 'ft3',
    'cubic feet': 'ft3',
    'cu ft': 'ft3',

    # Length
    'nm': 'nm',
    'um': 'um',
    'µm': 'um',
    'micron': 'um',
    'mm': 'mm',
    'cm': 'cm',
    'mil': 'mil',
    'in': 'in',
    'inch': 'in',
    'inches': 'in',
    '"': 'in',
    'ft': 'ft',
    'feet': 'ft',
    'foot': 'ft',

    # Area
    'cm2': 'cm2',
    'cm²': 'cm2',
    'm2': 'm2',
    'm²': 'm2',
    'in2': 'in2',
    'in²': 'in2',
    'sq in': 'in2',
    'ft2': 'ft2',
    'ft²': 'ft2',
    'sq ft': 'ft2',
    'dm2': 'dm2',
    'dm²': 'dm2',

    # Electrical
    'a': 'a',
    'amp': 'a',
    'amps': 'a',
    'ampere': 'a',
    'amperes': 'a',
    'ma': 'ma',
    'milliamp': 'ma',
    'milliamps': 'ma',
    'v': 'v',
    'volt': 'v',
    'volts': 'v',
    'a/dm2': 'asd_a_dm2',
    'a/dm²': 'asd_a_dm2',
    'asd': 'asd_a_dm2',
    'a/ft2': 'asd_a_ft2',
    'a/ft²': 'asd_a_ft2',
    'asf': 'asd_a_ft2',
    'dm2/l': 'dm2_l',
    'dm²/l': 'dm2_l',

    # Pressure
    'pa': 'pa',
    'kpa': 'kpa',
    'bar': 'bar',
    'psi': 'psi',
    'mmhg': 'mmhg',

    # Rate
    'kg/day': 'kg_day',
    'l/day': 'l_day',
    'kg/month': 'kg_month',
    'l/min': 'l_min',
    'lpm': 'l_min',
    'gpm': 'gpm',
    'cfm': 'cfm',

    # Exposure
    'mg/m3': 'mg_m3',
    'mg/m³': 'mg_m3',
    'ug/m3': 'ug_m3',
    'µg/m³': 'ug_m3',
    'dba': 'dba',
    'db': 'dba',
    'lux': 'lux',

    # Plating counts
    'mto': 'mto',
    'cycle': 'cycles',
    'cycles': 'cycles',
    'count': 'count',
    'each': 'each',
    'ea': 'each',
    'pcs': 'each',
    'pieces': 'each',
    'rpm': 'rpm',
}


def fp_normalize_legacy_uom(raw_value):
    """Translate a legacy free-text UoM string to a selection key.

    Returns the selection key, or None if no match (caller decides whether
    to NULL the column or leave it).
    """
    if raw_value is None:
        return None
    key = (raw_value or '').strip().lower()
    if not key:
        return None
    return FP_UOM_LEGACY_MAP.get(key)


def fp_migrate_uom_column(env, table, column, label_for_log=None):
    """Walk a table's free-text uom column and rewrite values into the
    selection keys. Unmapped values are set to NULL so the user is forced
    to pick a valid one.

    Idempotent — running on a column that's already converted is a no-op
    because all values will already be selection keys (which are a subset
    of FP_UOM_LEGACY_MAP via identity mappings like 'g_l' → 'g_l').

    Args:
        env: Odoo environment.
        table: SQL table name (e.g. 'fusion_plating_bath_parameter').
        column: SQL column name (e.g. 'uom').
        label_for_log: human-readable name for the migration log line.
    """
    cr = env.cr
    cr.execute(
        "SELECT 1 FROM information_schema.columns "
        "WHERE table_name = %s AND column_name = %s",
        (table, column),
    )
    if not cr.fetchone():
        return 0, 0  # table/column not present (module not installed)
    cr.execute(f'SELECT id, "{column}" FROM "{table}" WHERE "{column}" IS NOT NULL')
    rows = cr.fetchall()
    valid_keys = {k for k, _ in FP_UOM_SELECTION}
    cleared = 0
    rewritten = 0
    for row_id, raw in rows:
        if raw in valid_keys:
            continue  # already a selection key
        new_key = fp_normalize_legacy_uom(raw)
        if new_key:
            cr.execute(
                f'UPDATE "{table}" SET "{column}" = %s WHERE id = %s',
                (new_key, row_id),
            )
            rewritten += 1
        else:
            cr.execute(
                f'UPDATE "{table}" SET "{column}" = NULL WHERE id = %s',
                (row_id,),
            )
            cleared += 1
    import logging
    _logger = logging.getLogger(__name__)
    _logger.info(
        'Fusion Plating UoM migration — %s.%s%s: %s rewritten, %s cleared',
        table, column, f' ({label_for_log})' if label_for_log else '',
        rewritten, cleared,
    )
    return rewritten, cleared