#!/usr/bin/env bash

set -euo pipefail

repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
harness="$repo_dir/config/dot/quickshell/home-brightness-slider-harness.qml"
state_home="$(mktemp -d /tmp/panama-home-brightness-slider.XXXXXX)"
shell_log="$state_home/quickshell.log"

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

qs_for_harness() {
    QS_DISABLE_CRASH_HANDLER=1 XDG_STATE_HOME="$state_home" \
        qs -p "$harness" "$@"
}

cleanup() {
    qs_for_harness kill >/dev/null 2>&1 || true
    rm -rf "$state_home"
}
trap cleanup EXIT

start_harness() {
    qs_for_harness --daemonize >"$shell_log" 2>&1
    for _ in $(seq 1 50); do
        if qs_for_harness ipc show 2>/dev/null \
                | rg -q '^target home-brightness-slider-test$'; then
            return
        fi
        sleep 0.1
    done
    sed -n '1,160p' "$shell_log" >&2
    fail 'isolated slider harness did not start'
}

assert_status() {
    local filter="$1"
    local message="$2"
    local status=""

    status="$(qs_for_harness ipc call home-brightness-slider-test status)"
    jq -e "$filter" <<<"$status" >/dev/null || {
        printf 'Slider status: %s\n' "$status" >&2
        fail "$message"
    }
}

start_harness

qs_for_harness ipc call home-brightness-slider-test reset 30 >/dev/null
assert_status \
    '.accessibleRoleIsSlider == true and .accessibleName == "Desk lamp brightness" and .accessibleDescription == "30 percent, range 0 to 100" and .accessibleFocusable == true' \
    'slider accessibility metadata is incomplete or incorrect'
qs_for_harness ipc call home-brightness-slider-test press 140 >/dev/null
assert_status \
    '.confirmedValue == 30 and .previewValue == 70 and .interactionActive == true and .commitCount == 0 and .accessibleDescription == "70 percent, range 0 to 100"' \
    'pointer press did not remain a local preview'
qs_for_harness ipc call home-brightness-slider-test release >/dev/null
assert_status \
    '.previewValue == 70 and .interactionActive == false and .commitCount == 1 and .lastCommit == 70' \
    'one pointer release did not emit exactly one commit'
qs_for_harness ipc call home-brightness-slider-test release >/dev/null
assert_status '.commitCount == 1' 'release without an interaction emitted another commit'

qs_for_harness ipc call home-brightness-slider-test reset 30 >/dev/null
qs_for_harness ipc call home-brightness-slider-test wheel 120 >/dev/null
assert_status \
    '.previewValue == 35 and .interactionActive == false and .commitCount == 1 and .lastCommit == 35' \
    'one wheel event did not emit exactly one five-point commit'

qs_for_harness ipc call home-brightness-slider-test reset 30 >/dev/null
qs_for_harness ipc call home-brightness-slider-test press 160 >/dev/null
assert_status \
    '.previewValue == 80 and .interactionActive == true and .commitCount == 0' \
    'cancellation setup did not enter local preview state'
qs_for_harness ipc call home-brightness-slider-test external 45 >/dev/null
assert_status \
    '.confirmedValue == 45 and .previewValue == 80 and .interactionActive == true and .commitCount == 0' \
    'external confirmed or pending state replaced an active local preview'
qs_for_harness ipc call home-brightness-slider-test cancel >/dev/null
assert_status \
    '.confirmedValue == 45 and .previewValue == 45 and .interactionActive == false and .commitCount == 0 and .lastCommit == -1' \
    'canceled interaction committed or failed to restore the external value'

trap - EXIT
cleanup
printf 'Home brightness slider contract: PASS\n'