#!/usr/bin/env bash

# scripts/panama-idle generates hypridle's configuration from Panama's settings.
#
# This is the one generator that can cost the user their automatic screen lock,
# so the properties that matter are: zero means never (rather than "immediately",
# which a naive template would produce), values are clamped even when the
# settings file has been hand-edited, and a missing or corrupt file still yields
# a working configuration rather than an empty one.

set -euo pipefail

repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
helper="$repo_dir/config/dot/quickshell/scripts/panama-idle"
work="$(mktemp -d /tmp/panama-idle-contract.XXXXXX)"

fail() {
    printf 'idle config contract: %s\n' "$1" >&2
    exit 1
}

cleanup() { rm -rf "$work"; }
trap cleanup EXIT

generated="$work/state/panama/hypridle.conf"

run_with() {
    # Isolated config AND state, so this never touches the real generated file
    # and never restarts the user's hypridle: `apply` only restarts when the
    # systemd drop-in exists, and it cannot exist under this temporary root.
    mkdir -p "$work/config/panama"
    printf '%s' "$1" >"$work/config/panama/settings.json"
    XDG_CONFIG_HOME="$work/config" XDG_STATE_HOME="$work/state" "$helper" apply
}

# ── Shipped defaults ─────────────────────────────────────────────────────────
run_with '{}'
grep -q 'timeout = 300' "$generated" || fail 'default screen blank is not 5 minutes'
grep -q 'timeout = 600' "$generated" || fail 'default lock is not 10 minutes'
grep -q 'before_sleep_cmd' "$generated" || fail 'lock before sleep missing by default'
grep -q 'systemctl suspend' "$generated" && fail 'automatic suspend is on by default'

# ── Zero means never, not immediately ────────────────────────────────────────
run_with '{"screenBlankMinutes":0,"lockMinutes":0,"suspendMinutes":0}'
grep -q 'timeout = 0' "$generated" && fail 'a zero timeout was written as an immediate trigger'
# `dpms` also appears in general.after_sleep_cmd, which is correct and must
# stay; what must not exist is any listener at all.
grep -qE '^listener' "$generated" && fail 'a listener was written when everything is set to never'
grep -q 'after_sleep_cmd' "$generated" || fail 'the general block was lost when all timers are off'

# ── Values are honoured ──────────────────────────────────────────────────────
run_with '{"screenBlankMinutes":2,"lockMinutes":7,"suspendMinutes":45}'
grep -q 'timeout = 120' "$generated" || fail '2 minute blank not honoured'
grep -q 'timeout = 420' "$generated" || fail '7 minute lock not honoured'
grep -q 'timeout = 2700' "$generated" || fail '45 minute suspend not honoured'
grep -q 'systemctl suspend' "$generated" || fail 'suspend listener missing when set'

# ── lockOnSleep off removes the pre-sleep lock ───────────────────────────────
run_with '{"lockOnSleep":false}'
grep -q 'before_sleep_cmd' "$generated" && fail 'pre-sleep lock present when disabled'

# ── Hand-edited nonsense is clamped, not passed through ──────────────────────
run_with '{"screenBlankMinutes":99999,"lockMinutes":-40,"suspendMinutes":"soon"}'
grep -q 'timeout = 7200' "$generated" || fail 'an above-range blank was not clamped to the maximum'
grep -q 'timeout = 0' "$generated" && fail 'a negative lock produced an immediate trigger'
grep -q 'systemctl suspend' "$generated" && fail 'a non-numeric suspend produced a listener'

# ── A corrupt or absent settings file still yields a working config ──────────
run_with '{ not json at all'
grep -q 'timeout = 300' "$generated" || fail 'a corrupt settings file did not fall back to defaults'
rm -f "$work/config/panama/settings.json"
XDG_CONFIG_HOME="$work/config" XDG_STATE_HOME="$work/state" "$helper" apply
grep -q 'timeout = 300' "$generated" || fail 'an absent settings file did not fall back to defaults'

# ── status reports what it generated ─────────────────────────────────────────
status="$(XDG_CONFIG_HOME="$work/config" XDG_STATE_HOME="$work/state" "$helper" status)"
jq -e '.managed == false and .blankMinutes == 5 and .lockMinutes == 10' <<<"$status" >/dev/null \
    || fail "status did not report the generated values: $status"

trap - EXIT
cleanup
printf 'idle config contract: PASS\n'