# -*- coding: utf-8 -*-
"""Backups IA-split move check (v0.124.0, one-shot) — the split MOVED the v0.123.0 sections,
it did not rewrite them: every moved block from the pre-split backups.html (commit df7ad37)
must appear, whitespace-normalized, on EXACTLY its mapped page. Allowed divergences are encoded
explicitly (the tier-3 anchor retarget; the restore-to-verify form's relocation).

Run from controller/:  python scripts/backups_split_move_check.py
"""
import io, os, re, subprocess, sys

BASELINE = "df7ad37"
OLD_PATH = "controller/internal/web/templates/backups.html"
TPL = os.path.join("internal", "web", "templates")

# (name, 1-indexed start, end inclusive, target template file, normalizer applied to the NEW page)
BLOCKS = [
    ("storage-overview",   32,  77, "backups.html",         None),
    ("whole-guest",        79, 124, "backups.html",         None),
    ("stat-cards",        227, 271, "backups.html",         None),
    ("offbox-pre",        127, 186, "backups_remote.html",  None),
    ("offbox-post",       193, 221, "backups_remote.html",  None),
    ("apps-divider",      224, 225, "backups_apps.html",    None),
    ("schedule",          273, 302, "backups_apps.html",    None),
    ("databases",         304, 376, "backups_apps.html",    None),
    # the tier-3 action anchors were retargeted cross-page — normalize them back before comparing
    ("per-app-rows",      378, 541, "backups_apps.html",
        lambda s: s.replace('href="/backups/remote#offbox-section"', 'href="#offbox-section"')),
    ("restore-panel",     543, 586, "backups_restore.html", None),
    ("offbox-verify-form", 188, 191, "backups_restore.html", None),
    ("banner-js",         591, 627, "backups_shared.html",  None),
    ("apps-js",           628, 674, "backups_apps.html",    None),
    ("guest-js",          676, 712, "backups.html",         None),
    ("restore-js",        714, 841, "backups_restore.html", None),
]

PAGES = ["backups.html", "backups_remote.html", "backups_apps.html", "backups_restore.html",
         "backups_shared.html"]


def norm(s):
    return re.sub(r"\s+", " ", s).strip()


def main():
    old = subprocess.run(["git", "show", BASELINE + ":" + OLD_PATH],
                         capture_output=True, text=True, encoding="utf-8")
    if old.returncode != 0:
        print("cannot read baseline %s:%s — %s" % (BASELINE, OLD_PATH, old.stderr.strip()))
        sys.exit(2)
    old_lines = old.stdout.split("\n")

    pages = {}
    for fn in PAGES:
        pages[fn] = io.open(os.path.join(TPL, fn), encoding="utf-8").read()

    failed = 0
    for name, a, b, target, fix in BLOCKS:
        block = norm("\n".join(old_lines[a - 1:b]))
        hits = []
        for fn in PAGES:
            content = pages[fn]
            if fix:
                content = fix(content)
            if block in norm(content):
                hits.append(fn)
        if hits != [target]:
            failed += 1
            print("MOVED-BLOCK MISMATCH %-18s (old L%d-%d): expected [%s], found %s"
                  % (name, a, b, target, hits))
    if failed:
        print("MOVE CHECK FAILED: %d block(s) rewritten, duplicated or lost" % failed)
        sys.exit(1)
    print("move check OK — all %d v0.123.0 blocks moved verbatim to their mapped page" % len(BLOCKS))


if __name__ == "__main__":
    main()