#!/usr/bin/env python3
# © 2021-2026 TechnoLibre (http://www.technolibre.ca)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)

"""Neutralize the website COW views that would break a version bump.

How it works
------------
``key`` is the only thing that pairs a website copy with the module view it
came from. A copy whose key matches nothing is never paired, so it never
receives the new ``inherit_id``, never changes shape, and never takes part in
any view combination. Renaming the key is therefore enough to take a copy out
of the way::

    UPDATE ir_ui_view SET key = '<prefix>.' || key, active = false WHERE id = ?

Setting ``active = false`` alone would NOT work: an inactive copy that keeps
the same key still shadows the module view.

Nothing is deleted, so ``inherit_id ondelete='restrict'`` and the
``website_page`` foreign keys are never touched, and the 12.0 arch stays in
database as a readable archive. ``--restore`` puts everything back.

Plain psql on purpose: this must run on a database that has not been migrated
yet, where starting an Odoo shell of the target version is not guaranteed.
"""

import argparse
import os
import subprocess
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from check_cow_views import analyse, t  # noqa: E402

DEFAULT_PREFIX = "zz_cow_archive"


def run_psql(database, sql):
    """Run a statement and return stdout, raising on failure."""
    result = subprocess.run(
        ["psql", "-X", "-w", "-d", database, "-tAF", "|", "-c", sql],
        capture_output=True,
        text=True,
    )
    if result.returncode:
        raise RuntimeError(
            f"Query failed on '{database}': {result.stderr.strip()}"
        )
    return result.stdout.strip()


def neutralize(database, lst_view_id, prefix):
    """Rename the key of the given views and deactivate them."""
    if not lst_view_id:
        return 0
    ids = ",".join(str(view_id) for view_id in lst_view_id)
    output = run_psql(
        database,
        "WITH updated AS ("
        f" UPDATE ir_ui_view SET key = '{prefix}.' || key, active = false"
        f" WHERE id IN ({ids}) AND key NOT LIKE '{prefix}.%'"
        " RETURNING 1) SELECT count(*) FROM updated;",
    )
    return int(output or 0)


def list_archived(database, prefix):
    """The copies a previous neutralization put aside.

    Knowing what was archived is the other half of --restore: a key renamed
    months ago is invisible in the interface — the copy is inactive and no
    longer pairs with anything — so without this listing the only trace is
    someone's memory of having run --apply.
    """
    output = run_psql(
        database,
        "SELECT id, substring(key from " + str(len(prefix) + 2) + "),"
        " COALESCE(website_id::text, ''), active,"
        " octet_length(arch_db::text)"
        f" FROM ir_ui_view WHERE key LIKE '{prefix}.%' ORDER BY id;",
    )
    lst_row = []
    for line in output.splitlines():
        if not line.strip():
            continue
        parts = line.split("|")
        if len(parts) >= 5:
            lst_row.append(
                {
                    "id": int(parts[0]),
                    "key": parts[1],
                    "website_id": parts[2] or None,
                    "active": parts[3] == "t",
                    "arch_bytes": int(parts[4] or 0),
                }
            )
    return lst_row


def restore(database, prefix):
    """Undo a neutralization: strip the prefix and reactivate."""
    output = run_psql(
        database,
        "WITH updated AS ("
        f" UPDATE ir_ui_view SET key = substring(key from {len(prefix) + 2}),"
        "  active = true"
        f" WHERE key LIKE '{prefix}.%'"
        " RETURNING 1) SELECT count(*) FROM updated;",
    )
    return int(output or 0)


def main():
    parser = argparse.ArgumentParser(
        description=(
            "Neutralize the website COW views that would break a version"
            " bump, by renaming their key. Dry-run unless --apply."
        )
    )
    parser.add_argument("-d", "--database", required=True)
    parser.add_argument(
        "-t",
        "--target_version",
        help="target Odoo source directory, e.g. odoo13.0",
    )
    parser.add_argument(
        "--prefix",
        default=DEFAULT_PREFIX,
        help=f"archive prefix for the key (default: {DEFAULT_PREFIX})",
    )
    parser.add_argument(
        "--apply", action="store_true", help="actually write to the database"
    )
    parser.add_argument(
        "--restore",
        action="store_true",
        help="undo a previous neutralization and reactivate the copies",
    )
    parser.add_argument(
        "--list",
        dest="list_archived",
        action="store_true",
        help="list the copies a previous neutralization put aside",
    )
    config = parser.parse_args()

    try:
        return _run(config, parser)
    except RuntimeError as exc:
        # Une base absente ou un PostgreSQL arrêté est une erreur d'usage, pas
        # un défaut de l'outil : une trace d'appel ferait chercher le bogue au
        # mauvais endroit.
        print(f"❌ {exc}")
        return 2


def _run(config, parser):
    if config.list_archived:
        lst_row = list_archived(config.database, config.prefix)
        if not lst_row:
            print(
                f"✅ -> {t('No view with this prefix on')}"
                f" '{config.database}' : '{config.prefix}.'"
            )
            return 0
        print(
            f"ℹ {len(lst_row)} {t('archived COW view(s) on')}"
            f" '{config.database}' :"
        )
        for row in lst_row:
            state = "active" if row["active"] else "inactive"
            print(
                f"   - id={row['id']} website={row['website_id'] or '-'}"
                f" {row['key']} ({state}, {row['arch_bytes']} B)"
            )
        print(
            f"   {t('Their arch is intact. Restore them all with --restore,')}"
            f" {t('once the module view they shadow has the right shape.')}"
        )
        return 0

    if config.restore:
        count = restore(config.database, config.prefix)
        print(
            f"✅ -> {count} {t('COW view(s) restored on')} '{config.database}'."
        )
        return 0

    if not config.target_version:
        parser.error("--target_version is required unless --restore is used")
    if not os.path.isdir(config.target_version):
        print(
            f"❌ {t('Target version directory not found')} :"
            f" '{config.target_version}'"
        )
        return 2

    lst_at_risk, _, _ = analyse(config.database, config.target_version)
    if not lst_at_risk:
        print(f"✅ -> {t('No website COW view to neutralize.')}")
        return 0

    print(
        f"⚠️ {len(lst_at_risk)} {t('website COW view(s) would break the bump')}"
        f" {t('to')} {config.target_version} :"
    )
    lst_view_id = []
    for view_id, key, mode, target_mode, website_id, reason in lst_at_risk:
        lst_view_id.append(view_id)
        print(
            f"   - id={view_id} website={website_id} {key}"
            f" : {mode} -> {target_mode} ({t(reason)})"
        )

    if not config.apply:
        print(
            f"ℹ {t('Dry-run. Add --apply to rename their key to')}"
            f" '{config.prefix}.<key>' {t('and deactivate them. Reversible')}"
            f" {t('with --restore; the arch stays in database.')}"
        )
        # 1 = des copies sont à neutraliser. Le pilote lisait une phrase
        # anglaise pour le savoir ; il devenait aveugle une fois traduite.
        return 1

    count = neutralize(config.database, lst_view_id, config.prefix)
    print(
        f"✅ -> {count} {t('COW view(s) neutralized (key prefixed with')}"
        f" '{config.prefix}.', {t('deactivated). The arch is kept as an')}"
        f" {t('archive; use --restore to undo.')}"
    )
    return 0


if __name__ == "__main__":
    sys.exit(main())