#!/usr/bin/env bash
set -euo pipefail

repoRoot="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
testRoot="$(mktemp -d)"
trap 'rm -rf "$testRoot"' EXIT

export HOME="${testRoot}/home"
export XDG_DATA_HOME="${HOME}/.local/share"
export XDG_CONFIG_HOME="${HOME}/.config"
export XDG_CACHE_HOME="${HOME}/.cache"
export DISPLAY=""
export cache="${XDG_CACHE_HOME}/audiogame-manager"
export configFile="${XDG_CONFIG_HOME}/storm-games/audiogame-manager/games.conf"
export game="Shadow Line"
export scriptDir="$repoRoot"
mkdir -p "$cache" "${configFile%/*}" "${testRoot}/bin"
touch "$configFile"

cat > "${testRoot}/bin/umu-run" <<'STUB'
#!/usr/bin/env bash
printf '%s|%s|%s|%s\n' "$WINEPREFIX" "$GAMEID" "${STORE:-}" "$*" >> "$UMU_STUB_LOG"
if [[ "${1:-}" == "" ]]; then
    mkdir -p "$WINEPREFIX/drive_c"
fi
STUB
chmod +x "${testRoot}/bin/umu-run"

cat > "${testRoot}/bin/wine" <<'STUB'
#!/usr/bin/env bash
if [[ "${1:-}" == "winepath" || "${1:-}" == "winepath.exe" ]]; then
    shift
fi
if [[ "${1:-}" == "-u" ]]; then
    input="$2"
    path="${input#c:\\}"
    path="${path//\\//}"
    printf '%s/drive_c/%s\n' "$WINEPREFIX" "$path"
    exit 0
fi
printf 'wine %s\n' "$*" >> "$WINE_STUB_LOG"
STUB
chmod +x "${testRoot}/bin/wine"

cat > "${testRoot}/bin/wineserver" <<'STUB'
#!/usr/bin/env bash
printf 'wineserver %s\n' "$*" >> "$WINE_STUB_LOG"
STUB
chmod +x "${testRoot}/bin/wineserver"

export PATH="${testRoot}/bin:$PATH"
export UMU_STUB_LOG="${testRoot}/umu.log"
export WINE_STUB_LOG="${testRoot}/wine.log"

# shellcheck source=.includes/proton.sh
source "${repoRoot}/.includes/proton.sh"

assert_equals() {
    local expected="$1"
    local actual="$2"
    local message="$3"
    if [[ "$expected" != "$actual" ]]; then
        printf 'FAIL: %s\nexpected: %s\nactual: %s\n' "$message" "$expected" "$actual" >&2
        exit 1
    fi
}

assert_file_contains() {
    local file="$1"
    local pattern="$2"
    local message="$3"
    if ! grep -Fq "$pattern" "$file"; then
        printf 'FAIL: %s\nmissing pattern: %s\nfile contents:\n' "$message" "$pattern" >&2
        cat "$file" >&2
        exit 1
    fi
}

test_get_umu_bottle_sets_environment() {
    get_umu_bottle "shadow-line"
    assert_equals "${XDG_DATA_HOME}/audiogame-manager/protonBottles/shadow-line" "$WINEPREFIX" "WINEPREFIX points at AGM proton bottle"
    assert_equals "shadow-line" "$GAMEID" "GAMEID is exported"
    assert_equals "none" "$STORE" "STORE defaults to none"
    assert_equals ":0" "$DISPLAY" "DISPLAY defaults to :0"
}

test_add_umu_launcher_records_backend_and_game_id() {
    get_umu_bottle "shadow-line"
    add_umu_launcher "shadow-line" 'c:\Program Files (x86)\GalaxyLaboratory\ShadowRine_FullVoice\play_sr.exe'
    assert_file_contains "$configFile" 'umu|c:\Program Files (x86)\GalaxyLaboratory\ShadowRine_FullVoice\play_sr.exe|Shadow Line|export umuGameId=shadow-line' "UMU launcher entry is recorded"
}

test_run_umu_game_uses_converted_path() {
    get_umu_bottle "shadow-line"
    mkdir -p "${WINEPREFIX}/drive_c/Program Files (x86)/GalaxyLaboratory/ShadowRine_FullVoice"
    touch "${WINEPREFIX}/drive_c/Program Files (x86)/GalaxyLaboratory/ShadowRine_FullVoice/play_sr.exe"
    run_umu_game 'c:\Program Files (x86)\GalaxyLaboratory\ShadowRine_FullVoice\play_sr.exe'
    assert_file_contains "$UMU_STUB_LOG" "${WINEPREFIX}|shadow-line|none|${WINEPREFIX}/drive_c/Program Files (x86)/GalaxyLaboratory/ShadowRine_FullVoice/play_sr.exe" "UMU launches converted exe path"
}

test_install_crlf_file_normalizes_line_endings() {
    local sourceFile="${testRoot}/language_en.dat"
    local destFile="${testRoot}/installed/language_en.dat"
    local expectedFile="${testRoot}/expected-language_en.dat"
    printf 'line one\nline two\n' > "$sourceFile"
    printf 'line one\r\nline two\r\n' > "$expectedFile"

    install_crlf_file "$sourceFile" "$destFile"

    if ! cmp -s "$expectedFile" "$destFile"; then
        printf 'FAIL: Translation file is installed with CRLF line endings\n' >&2
        exit 1
    fi
}

test_get_umu_bottle_sets_environment
test_add_umu_launcher_records_backend_and_game_id
test_run_umu_game_uses_converted_path
test_install_crlf_file_normalizes_line_endings
printf 'UMU backend tests passed\n'