// vtest build: tinyc
import os

const test_dir = os.join_path('vlib', 'v', 'gen', 'js', 'tests')
const output_dir = os.join_path(os.vtmp_dir(), '_js_tests/')
const v_options = '-b js -w'
const node_options = ''

fn testsuite_end() {
    os.rmdir_all(output_dir) or {}
}

const there_is_node_available = is_nodejs_working()

const there_is_grep_available = is_grep_working()

fn test_example_compilation() {
    vexe := os.getenv('VEXE')
    os.chdir(os.dir(vexe)) or {}
    os.mkdir_all(output_dir) or { panic(err) }
    files := find_test_files()
    for file in files {
        path := os.join_path(test_dir, file)
        println('Testing ${file}')
        mut v_options_file := v_options
        mut node_options_file := node_options
        should_create_source_map := file.ends_with('_sourcemap.v')
        if should_create_source_map {
            println('activate -sourcemap creation')
            v_options_file += ' -sourcemap' // activate souremap generation

            println('add node option: --enable-source-maps') // requires node >=12.12.0
            node_options_file += ' --enable-source-maps' // activate souremap generation
        }
        jsfile := os.join_path_single(output_dir, '${file}.js')
        v_code :=
            os.system('${os.quoted_path(vexe)} ${v_options_file} -o ${os.quoted_path(jsfile)} ${os.quoted_path(path)}')
        if v_code != 0 {
            assert false
        }
        // Compilation failed
        assert v_code == 0
        if !there_is_node_available {
            println(' ... skipping running ${file}, there is no NodeJS present')
            continue
        }
        js_code := os.system('node ${os.quoted_path(jsfile)}')
        if js_code != 0 {
            assert false
        }
        // Running failed
        assert js_code == 0
        if should_create_source_map {
            if there_is_grep_available {
                grep_code_sourcemap_found :=
                    os.system('grep -q -E "//#\\ssourceMappingURL=data:application/json;base64,[-A-Za-z0-9+/=]+$" ${os.quoted_path(jsfile)}')
                assert grep_code_sourcemap_found == 0
                println('file has a source map embedded')
            } else {
                println(' ... skipping testing for sourcemap ${file}, there is no grep present')
            }
        }
    }
}

fn test_issue_11379_js_browser_builtin_print_call_does_not_panic() {
    vexe := os.getenv('VEXE')
    os.chdir(os.dir(vexe)) or {}
    os.mkdir_all(output_dir) or { panic(err) }
    program := os.join_path(test_dir, 'testdata', 'js_browser_builtin_print_regression.v')
    output := os.join_path(output_dir, 'js_browser_builtin_print_regression.js')
    res :=
        os.execute('${os.quoted_path(vexe)} -enable-globals -b js_browser -o ${os.quoted_path(output)} ${os.quoted_path(program)}')
    assert res.exit_code == 0, res.output
    assert !res.output.contains('V panic:'), res.output
    assert os.exists(output)
}

fn test_issue_20667_js_can_compile_game_of_life_example() {
    vexe := os.getenv('VEXE')
    os.chdir(os.dir(vexe)) or {}
    os.mkdir_all(output_dir) or { panic(err) }
    program := os.join_path('examples', 'game_of_life', 'life.v')
    output := os.join_path(output_dir, 'game_of_life.js')
    res :=
        os.execute('${os.quoted_path(vexe)} -prod -b js -w -o ${os.quoted_path(output)} ${os.quoted_path(program)}')
    assert res.exit_code == 0, res.output
    assert os.exists(output)
}

fn test_issue_23554_js_browser_interpolated_at_exprs_do_not_emit_nested_templates() {
    vexe := os.getenv('VEXE')
    os.chdir(os.dir(vexe)) or {}
    os.mkdir_all(output_dir) or { panic(err) }
    program := os.join_path(output_dir, 'issue_23554.v')
    output := os.join_path(output_dir, 'issue_23554.js')
    source := [
        'fn main() {',
        "\tprintln('\${@LOCATION}')",
        "\tprintln('\${@FILE_LINE}')",
        "\tprintln('X \${@LOCATION}')",
        "\tprintln('X \${@FILE_LINE}')",
        '}',
    ].join_lines()
    os.write_file(program, source) or { panic(err) }
    res :=
        os.execute('${os.quoted_path(vexe)} -b js_browser -o ${os.quoted_path(output)} ${os.quoted_path(program)}')
    assert res.exit_code == 0, res.output
    js := os.read_file(output) or { panic(err) }
    assert !js.contains('new string(`' + '$' + '{"')
    assert os.exists(output)
}

fn find_test_files() []string {
    files := os.ls(test_dir) or { panic(err) }
    // The life example never exits, so tests would hang with it, skip
    mut tests := files.filter(it.ends_with('.v')).filter(it != 'life.v')
    tests.sort()
    return tests
}

fn is_nodejs_working() bool {
    node_res := os.execute('node --version')
    if node_res.exit_code != 0 {
        return false
    }
    return true
}

fn is_grep_working() bool {
    node_res := os.execute('grep --version')
    if node_res.exit_code != 0 {
        return false
    }
    return true
}