#!/bin/bash
# run static code checks like eslint, mypy, ruff, vulture.

set -eu

# requires: pyproject.toml
# requires: containers/flatpak/test/ruff.toml
# requires: pkg/ruff.toml
# requires: test/common/ruff.toml
# requires: test/example/ruff.toml
# requires: test/verify/ruff.toml
# requires: tools/vulture_suppressions/ruff.toml

# we consider any function named test_* to be a test case
# each test is considered to succeed if it exits with no output
# exit with status 77 is a skip, with the message in the output
# otherwise, any output is a failure, even if exit status is 0

# note: `set -e` is not active during the tests.

find_scripts() {
    # Helper to find all scripts in the tree
    (
        # Any non-binary file which contains a given shebang
        git grep --cached -lIz '^#!.*'"$1"
        shift
        # Any file matching the provided globs
        git ls-files -z "$@"
    ) | sort -z | uniq -z
}

find_python_files() {
    find_scripts 'python3' '*.py'
}

test_ruff() {
    command -v ruff >/dev/null || skip 'no ruff'
    find_python_files | xargs -r -0 ruff check --quiet --no-cache
}

if [ "${WITH_PARTIAL_TREE:-0}" = 0 ]; then
    test_mypy() {
        command -v mypy >/dev/null || skip 'no mypy'
        for file in $(cat test/mypy-deps 2>/dev/null || true); do
            test -e "${file}" || skip "no ${file}"
        done
        find_python_files | xargs -r -0 mypy --no-error-summary
    }

    test_vulture() {
        # vulture to find unused variables/functions
        command -v vulture >/dev/null || skip 'no vulture'
        find_python_files | xargs -r -0 vulture
    }
fi


test_js_translatable_strings() {
    # Translatable strings must be marked with _(""), not _('')

    ! git grep -n -E "(gettext|_)\(['\`]" -- {src,pkg}/'*'.{js,jsx}
}

if [ "${WITH_PARTIAL_TREE:-0}" = 0 ]; then
    test_eslint() {
        test -x node_modules/.bin/eslint -a -x /usr/bin/node || skip 'no eslint'
        find_scripts 'node' '*.[jt]s' '*.[jt]sx' | xargs -0 node_modules/.bin/eslint
    }

    test_typescript() {
        test -x node_modules/.bin/tsc -a -x /usr/bin/node || skip 'no tsc'
        # Only display tsc output if it contains errors about something other than node_modules/
        # https://github.com/microsoft/TypeScript/issues/30511
        if node_modules/.bin/tsc --checkJs false --pretty false | grep -Eqv '^(node_modules| )'; then
            node_modules/.bin/tsc ${FORCE_COLOR:+--pretty true} --checkJs false
        fi
    }
fi

test_stylelint() {
    test -x node_modules/.bin/stylelint -a -x /usr/bin/node || skip 'no stylelint'
    git ls-files -z '*.css' '*.scss' | xargs -r -0 node_modules/.bin/stylelint
}

test_no_translatable_attr() {
    # Use of translatable attribute in HTML: should be 'translate' instead

    ! git grep -n 'translatable=["'\'']yes' -- pkg doc
}

test_unsafe_security_policy() {
    # It's dangerous to have 'unsafe-inline' or 'unsafe-eval' in our
    # content-security-policy entries.

    git grep -lIz -E 'content-security-policy.*(\*|unsafe)' 'pkg/*/manifest.json' | while read -d '' filename; do
        if test ! -f "$(dirname ${filename})/content-security-policy.override"; then
            echo "${filename} contains unsafe content security policy"
        fi
    done
}

test_json_verify() {
    # Check (almost) all JSON files for validity
    git ls-files -z '*.json' | grep -zv ^tsconfig | xargs -r -0 python3 -c "
import argparse
import json

parser = argparse.ArgumentParser()
parser.add_argument('files', nargs='+', type=argparse.FileType(encoding='utf-8'))
args = parser.parse_args()

for file in args.files:
    try:
        json.load(file)
    except ValueError as exc:  # both JSONDecodeError and UnicodeError
        print(f'{file.name}: {exc}')
"
}

test_html_verify() {
    # Check all HTML files for syntactic validity

    git ls-files -z 'pkg/*.html' | while read -d '' filename; do
        if ! python3 -c "import xml.etree.ElementTree as ET; ET.parse('${filename}')"; then
            echo "${filename} contains invalid XML"
        fi
    done
}

test_include_config_h() {
    # Every C file should #include "config.h" at the top

    git ls-files -cz '*.c' | while read -d '' filename; do
        if sed -n '/^#include "config.h"$/q1; /^\s*#/q;' "${filename}"; then
            printf '%s: #include "config.h" is not the first line\n' "${filename}"
        fi
    done
}

### end of tests.  start of machinery.

skip() {
    printf "%s\n" "$*"
    exit 77
}

main() {
    if [ $# = 0 ]; then
        tap=''
    elif [ $# = 1 -a "$1" = "--tap" ]; then
        tap='1'
    else
        printf "usage: %s [--tap]\n" "$0" >&2
        exit 1
    fi

    cd "${0%/*}/.."
    if [ ! -e .git ]; then
        echo '1..0 # SKIP not in a git checkout'
        exit 0
    fi

    if test -t 1; then
        FORCE_COLOR=1
    fi

    exit_status=0
    counter=0

    tests=($(compgen -A function 'test_'))
    [ -n "${tap}" ] && printf "1..%d\n" "${#tests[@]}"

    for test_function in "${tests[@]}"; do
        path="/static-code/$(echo ${test_function} | tr '_' '-')"
        counter=$((counter + 1))
        fail=''
        skip=''

        # run the test, capturing its output and exit status
        output="$(${test_function} 2>&1)" && test_status=0 || test_status=$?

        if [ "${test_status}" = 77 ]; then
            if [ -z "${tap}" ]; then
                printf >&2 "WARNING: skipping %s: %s\n" "${path}" "${output}"
            fi
            skip=" # SKIP ${output}"
            output=''
        elif [ "${test_status}" != 0 -o -n "${output}" ]; then
            exit_status=1
            fail=1
        fi

        # Only print output on failures or --tap mode
        [ -n "${tap}" -o -n "${fail}" ] || continue

        # excluding the plan, this is the only output that we ever generate
        printf "%s %d %s%s\n" "${fail:+not }ok" "${counter}" "${path}" "${skip}"
        if [ -n "${output}" ]; then
            printf "%s\n" "${output}" | sed -e 's/^/# /'
        fi
    done

    exit "${exit_status}"
}

main "$@"
