#!/usr/bin/env bash

# This script defines common commands used during building / developing
# and makes it easy to run them.

SCRIPT_DIR=$(cd `dirname "${BASH_SOURCE[0]}"` && pwd)
PROJECT_ROOT=$SCRIPT_DIR
THIS=$0
COMMAND=${1:-watch}
shift
ARGS=("$@") # NOTE: This is a bash array!

BOLD="\033[1m"
UNDERLINED="\033[4m"
RESET="\033[0m"
LIGHT_CYAN="\033[96m"
GREEN="\033[32m"
RED="\033[31m"
DEFAULT_COLOR="\033[39m"

BUILD_CMD="cabal build all"
BUILD_ALL_CMD="cabal build all --enable-tests --enable-benchmarks"
TEST_CMD="cabal test"
TEST_UNIT_CMD="cabal test waspc-test"
TEST_CLI_CMD="cabal test cli-test"
TEST_E2E_CMD="cabal test e2e-test"
TEST_E2E_DELETE_GOLDENS="rm -r $PROJECT_ROOT/e2e-test/test-outputs/*-golden"
TEST_E2E_ACCEPT_ALL_CMD="$TEST_E2E_DELETE_GOLDENS && $TEST_E2E_CMD"
RUN_CMD="cabal run wasp-cli ${ARGS[@]}"
GHCID_CMD="ghcid --command=cabal repl"
GHCID_TEST_CMD="ghcid --command=cabal repl"

DEV_TOOLS_BIN="$PROJECT_ROOT/.bin"
function install_dev_tool () {
    echo "cabal --project-file=$PROJECT_ROOT/dev-tool.project install $1 --installdir=$DEV_TOOLS_BIN --install-method=copy --overwrite-policy=always"
}
function dev_tool_path () {
    echo "$DEV_TOOLS_BIN/$1"
}
STAN_CMD="$BUILD_ALL_CMD && $(install_dev_tool stan) && $(dev_tool_path stan) report ${ARGS[@]}"
HLINT_CMD="$(install_dev_tool hlint) && $(dev_tool_path hlint) . ${ARGS[@]}"
PRUNE_JUICE_CMD="$(install_dev_tool prune-juice) && $(dev_tool_path prune-juice) ${ARGS[@]}"
ORMOLU_BASE_CMD="$(install_dev_tool ormolu) && $(dev_tool_path ormolu) --color always --check-idempotence"
ORMOLU_CHECK_CMD="$ORMOLU_BASE_CMD --mode check "'$'"(git ls-files '*.hs' '*.hs-boot')"
ORMOLU_FORMAT_CMD="$ORMOLU_BASE_CMD --mode inplace "'$'"(git ls-files '*.hs' '*.hs-boot')"

echo_and_eval () {
    echo -e $"${LIGHT_CYAN}Running:${DEFAULT_COLOR}" $1 "\n"
    eval $1
}

echo_bold () { echo -e $"${BOLD}${1}${RESET}"; }

print_usage () {
    print_usage_cmd () {
        echo -e $"    ${UNDERLINED}${1}${RESET}"
        echo -e  "        $2";
    }

    echo_bold       "Usage: run <command>"
    echo            "Commands:"
    print_usage_cmd "build" \
                    "Builds the project."
    print_usage_cmd "test" \
                    "Executes all tests (unit + e2e). Builds the project first if needed."
    print_usage_cmd "test:unit [pattern]" \
                    "Executes only unit tests. Builds the project first if needed. If pattern is provided, it will run only tests whose description/name matches the pattern. Check https://github.com/UnkindPartition/tasty#patterns to learn more about valid patterns."
    print_usage_cmd "test:cli" \
                    "Executes only cli unit tests. Builds the project first if needed."
    print_usage_cmd "test:e2e" \
                    "Executes only e2e tests. Builds the project first if needed."
    print_usage_cmd "test:e2e:accept-all" \
                    "Accepts any diffs in the generated code in e2e tests. Does so by deleting current golden output and re-running e2e tests to produce new golden output."
    print_usage_cmd "wasp-cli <args>" \
                    "Runs the wasp executable while forwarding arguments. Builds the project first if needed."
    print_usage_cmd "ghcid" \
                    "Runs ghcid, which watches source file changes and reports errors. Does not watch tests."
    print_usage_cmd "ghcid-test" \
                    "Runs ghcid on both source and tests."
    print_usage_cmd "code-check" \
                    "Checks code by running it through formatter, linter and static analysis."
    print_usage_cmd "stan <args>" \
                    "Runs static code analysis on the code, generating stan.html. Builds the project first if needed."
    print_usage_cmd "hlint <args>" \
                    "Runs linter on the codebase."
    print_usage_cmd "prune-juice <args>" \
                    "Runs prune-juice on the codebase, which detects unused dependencies."
    print_usage_cmd "ormolu:check" \
                    "Runs the code formatter and reports if code is correctly formatted or not."
    print_usage_cmd "ormolu:format" \
                    "Runs the code formatter and formats the code in place."
    print_usage_cmd "module-graph" \
                    "Creates graph of modules in the project. Needs graphmod (available on hackage) and graphviz (your os distribution) installed."
}

exitStatusToString () {
    if (( $1 == 0 )); then echo "${GREEN}OK${RESET}"; else echo "${RED}FAIL${RESET}"; fi
}

case $COMMAND in
    build)
        echo_and_eval "$BUILD_CMD"
        ;;
    ghcid)
        echo_and_eval "$GHCID_CMD"
        ;;
    ghcid-test)
        # --color always is needed for Tasty to turn on the coloring.
        # NOTE: I did not put this into variable because I was not able to put single quotes
        #   around :main --color always that way and it was not working.
        ghcid -T=':main --color always' --command=cabal repl test/TastyDiscoverDriver.hs
        ;;
    test)
        echo_and_eval "$TEST_CMD"
        ;;
    test:unit)
        TEST_PATTERN="${ARGS[0]}"
        if [[ -z "$TEST_PATTERN" ]]
        then
            echo_and_eval "$TEST_UNIT_CMD"
        else
            echo_and_eval "$TEST_UNIT_CMD --test-options \"-p \\\"$TEST_PATTERN\\\"\""
        fi

        ;;
    test:cli)
        echo_and_eval "$TEST_CLI_CMD"
        ;;
    test:e2e)
        echo_and_eval "$TEST_E2E_CMD"
        ;;
    test:e2e:accept-all)
        echo_and_eval "$TEST_E2E_ACCEPT_ALL_CMD"
        ;;
    wasp-cli)
        echo_and_eval "$RUN_CMD"
        ;;
    stan)
        echo_and_eval "$STAN_CMD"
        ;;
    hlint)
        echo_and_eval "$HLINT_CMD"
        ;;
    prune-juice)
        echo_and_eval "$PRUNE_JUICE_CMD"
        ;;
    ormolu:check)
        echo_and_eval "$ORMOLU_CHECK_CMD"
        ;;
    ormolu:format)
        echo_and_eval "$ORMOLU_FORMAT_CMD"
        ;;
    code-check)
        echo_and_eval "$ORMOLU_CHECK_CMD"
        ORMOLU_RESULT=$?

        echo_and_eval "$HLINT_CMD"
        HLINT_RESULT=$?

        echo_and_eval "$STAN_CMD"
        STAN_RESULT=$?

        TOTAL_RESULT=$(($ORMOLU_RESULT || $HLINT_RESULT || $STAN_RESULT))

        echo
        echo
        echo "======================================"
        echo "               SUMMARY"
        echo "======================================"
        echo
        echo -e "Formatter (ormolu): $(exitStatusToString $ORMOLU_RESULT)"
        echo -e "Linter (hlint): $(exitStatusToString $HLINT_RESULT)"
        echo -e "Static analysis (stan): $(exitStatusToString $STAN_RESULT)"
        echo "-----------------------"
        echo -e "All together: $(exitStatusToString $TOTAL_RESULT)"

        exit $TOTAL_RESULT
        ;;
    module-graph)
        echo_and_eval "graphmod --quiet --prune-edges $PROJECT_ROOT/src/**/*.hs | dot -Gsize=60,60! -Tpng -o module-graph.png" && echo "Printed module graph to module-graph.png."
        ;;
    *)
        print_usage
        exit 1
esac