#!/usr/bin/env bash
set -o nounset -o errexit # -o xtrace  # Old Bash has buggy `errexit` - comment-out for such.

# This runs the tests, examples, and docs-gen with all possibilities of the crate's features.

readonly CARGO_OPTS=${1:-}  # Can give a +toolchain argument, e.g.
# shellcheck disable=SC2086  # Want word-splitting of `$CARGO_OPTS`.
function cargo { command cargo $CARGO_OPTS "$@" ;}


readonly FEATURES=("premade" "channel_notify_facility")
FEATURES_COMBOS=()
function features_combos {
    local N=$1 PREFIX=${2:-}
    for I in $(seq "$N" 1 $((${#FEATURES[@]} - 1)) 2> /dev/null); do
        local X=${PREFIX}${FEATURES[I]}
        FEATURES_COMBOS+=("$X")
        features_combos $((I + 1)) "$X,"  # (Note the trailing comma.)
    done
}
features_combos 0
readonly FEATURES_COMBOS
# for F in "${FEATURES_COMBOS[@]}"; do echo "$F"; done


readonly COMMANDS=(
    "test --tests"
    "test --doc"
    "run --example child_reset_mask"
    "run --example dedicated_thread"
    "run --example exercise"
    "run --example minimal"
    doc
)

FAILURES=()
SUCCESSES=()

function run {
    local C
    for C in "${COMMANDS[@]}"; do
        # shellcheck disable=SC2206  # Want word-splitting.
        local CMD=(cargo $C "$@")
        echo "Running: ${CMD[*]}"
        if quiet_unless_example "${CMD[@]}"; then
            SUCCESSES+=("${CMD[*]}")
        else
            FAILURES+=("${CMD[*]}")
        fi
    done
}

function quiet_unless_example {
    if [[ "$*" =~ ^cargo\ +run\ +--example\ + ]]; then
        "$@"
    else
        "$@" > /dev/null 2>&1
    fi
}


OS=$(uname)
readonly OS


echo "On: $OS.  Using: $(cargo --version)."

run  # First, run them with default features.

for F in "${FEATURES_COMBOS[@]}"; do
    run --no-default-features --features "$F"  # Run with all combinations of features.
done

run --no-default-features  # Lastly, run with no features.

readonly FAILURES


EXPECTED_FAILURES=(
    # Without the "premade" feature, these examples can't build.
    "cargo run --example dedicated_thread --no-default-features"
    "cargo run --example exercise --no-default-features"
    "cargo run --example minimal --no-default-features"
)
readonly EXPECTED_FAILURES

SURPRISE_FAILURES=()
SURPRISE_SUCCESSES=()

for F in "${FAILURES[@]}"; do
    IS_SURPRISE=true
    for E in "${EXPECTED_FAILURES[@]}"; do
        if [ "$F" = "$E" ]; then
            IS_SURPRISE=false
            break
        fi
    done
    if [ "$IS_SURPRISE" = true ]; then
        SURPRISE_FAILURES+=("$F")
    fi
done
readonly SURPRISE_FAILURES

for E in "${EXPECTED_FAILURES[@]}"; do
    IS_SURPRISE=false
    for S in "${SUCCESSES[@]}"; do
        if [ "$E" = "$S" ]; then
            IS_SURPRISE=true
            break
        fi
    done
    if [ "$IS_SURPRISE" = true ]; then
        SURPRISE_SUCCESSES+=("$E")
    fi
done
readonly SURPRISE_SUCCESSES

if (( ${#SURPRISE_SUCCESSES[@]} >= 1 ))
then
    echo
    echo "SURPRISE SUCCESSES (${#SURPRISE_SUCCESSES[@]}):"

    for S in "${SURPRISE_SUCCESSES[@]}"; do
        echo "$S"
    done
fi

if (( ${#SURPRISE_FAILURES[@]} == 0 ))
then
    echo
    echo "Success - no unexpected failures."
else
    echo
    echo "FAILURES (${#SURPRISE_FAILURES[@]}):"

    for F in "${SURPRISE_FAILURES[@]}"; do
        echo "$F"
    done

    exit 1
fi