#!/usr/bin/env bash
# ==============================================================================
# Input Validation Tests
# ==============================================================================

source "$(dirname "${BASH_SOURCE[0]}")/../lib/test_helpers.sh"

# ------------------------------------------------------------------------------
# Test: Help works without root
# ------------------------------------------------------------------------------
test_help_without_root() {
    local output
    output=$("$SCRIPT_PATH" help 2>&1)
    local exit_code=$?

    assert_exit_code 0 "$exit_code" "help should exit with 0" || return 1
    assert_contains "$output" "rsyncshot" "help should mention rsyncshot" || return 1
    assert_contains "$output" "Usage" "help should show usage" || return 1
}

# ------------------------------------------------------------------------------
# Test: Rejects non-alphabetic snapshot type
# ------------------------------------------------------------------------------
test_rejects_numeric_snapshot_type() {
    local output
    output=$(sudo "$SCRIPT_PATH" "123" "5" 2>&1)
    local exit_code=$?

    assert_exit_code 1 "$exit_code" "should reject numeric snapshot type" || return 1
    assert_contains "$output" "must be alphabetic" "should show alphabetic error" || return 1
}

# ------------------------------------------------------------------------------
# Test: Rejects mixed alphanumeric snapshot type
# ------------------------------------------------------------------------------
test_rejects_mixed_snapshot_type() {
    local output
    output=$(sudo "$SCRIPT_PATH" "hourly123" "5" 2>&1)
    local exit_code=$?

    assert_exit_code 1 "$exit_code" "should reject mixed snapshot type" || return 1
    assert_contains "$output" "must be alphabetic" "should show alphabetic error" || return 1
}

# ------------------------------------------------------------------------------
# Test: Rejects non-numeric retention count
# ------------------------------------------------------------------------------
test_rejects_alpha_retention_count() {
    local output
    output=$(sudo "$SCRIPT_PATH" "manual" "abc" 2>&1)
    local exit_code=$?

    assert_exit_code 1 "$exit_code" "should reject alphabetic count" || return 1
    assert_contains "$output" "must be a number" "should show number error" || return 1
}

# ------------------------------------------------------------------------------
# Test: Rejects mixed alphanumeric retention count
# ------------------------------------------------------------------------------
test_rejects_mixed_retention_count() {
    local output
    output=$(sudo "$SCRIPT_PATH" "manual" "5abc" 2>&1)
    local exit_code=$?

    assert_exit_code 1 "$exit_code" "should reject mixed count" || return 1
    assert_contains "$output" "must be a number" "should show number error" || return 1
}

# ------------------------------------------------------------------------------
# Test: Accepts valid alphabetic snapshot types
# ------------------------------------------------------------------------------
test_accepts_valid_snapshot_types() {
    # We use dryrun to avoid actual backup, and expect it to fail on missing config
    # but it should get past the validation stage
    local output
    output=$(sudo "$SCRIPT_PATH" dryrun "hourly" "24" 2>&1)

    # Should not contain the validation error (might fail for other reasons like missing config)
    assert_not_contains "$output" "must be alphabetic" "should accept valid type" || return 1
}

# ------------------------------------------------------------------------------
# Test: Rejects a retention count of zero
# ------------------------------------------------------------------------------
test_rejects_zero_count() {
    local output
    output=$(sudo "$SCRIPT_PATH" "manual" "0" 2>&1)
    local exit_code=$?

    assert_exit_code 1 "$exit_code" "should reject count 0" || return 1
    assert_contains "$output" "at least 1" "should explain minimum count" || return 1
}

# ------------------------------------------------------------------------------
# Test: Refuses an empty MOUNTDIR (would resolve to the filesystem root)
# ------------------------------------------------------------------------------
test_rejects_empty_mountdir() {
    setup_test_env
    cat > "$TEST_CONFIG_DIR/config" <<EOF
REMOTE_HOST=""
MOUNTDIR=""
EOF
    create_test_includes >/dev/null
    create_test_excludes >/dev/null

    local output
    output=$(sudo INSTALLHOME="$TEST_CONFIG_DIR" RSYNCSHOT_SKIP_MOUNT_CHECK=1 "$SCRIPT_PATH" manual 1 2>&1)
    local exit_code=$?

    teardown_test_env

    assert_exit_code 1 "$exit_code" "empty MOUNTDIR should be rejected" || return 1
    assert_contains "$output" "MOUNTDIR is empty" "should explain the empty-MOUNTDIR refusal" || return 1
}

# ------------------------------------------------------------------------------
# Test: status produces no stderr noise (the grep "0\n0" integer-test bug)
# ------------------------------------------------------------------------------
test_status_no_stderr_noise() {
    setup_test_env
    create_test_config >/dev/null
    create_test_includes >/dev/null
    create_test_excludes >/dev/null

    local stderr_file="$TEST_DIR/status.stderr"
    sudo INSTALLHOME="$TEST_CONFIG_DIR" RSYNCSHOT_SKIP_MOUNT_CHECK=1 "$SCRIPT_PATH" status >/dev/null 2>"$stderr_file"
    local err
    err=$(cat "$stderr_file")

    teardown_test_env

    assert_no_stderr "$err" "status should emit no stderr (no 'integer expression' noise)" || return 1
}

# ------------------------------------------------------------------------------
# Run tests
# ------------------------------------------------------------------------------
run_validation_tests() {
    echo ""
    echo "Running validation tests..."
    echo "------------------------------------------------------------"

    setup_test_env

    run_test "help works without root" test_help_without_root
    run_test "rejects numeric snapshot type" test_rejects_numeric_snapshot_type
    run_test "rejects mixed alphanumeric snapshot type" test_rejects_mixed_snapshot_type
    run_test "rejects alphabetic retention count" test_rejects_alpha_retention_count
    run_test "rejects mixed retention count" test_rejects_mixed_retention_count
    run_test "accepts valid snapshot types" test_accepts_valid_snapshot_types
    run_test "rejects retention count of zero" test_rejects_zero_count
    run_test "refuses empty MOUNTDIR" test_rejects_empty_mountdir
    run_test "status emits no stderr noise" test_status_no_stderr_noise

    teardown_test_env
}

# Run if executed directly
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    run_validation_tests
    print_summary
fi