document.getElementById("btn1").addEventListener("click", () => {
    const mode = {
        mode0: !document.getElementById("mode0").value ? 8 : document.getElementById("mode0").value,
        mode1: document.getElementById("mode1").checked ? true : false,
        mode2: document.getElementById("mode2").checked ? true : false,
        mode3: document.getElementById("mode3").checked ? true : false,
        mode4: document.getElementById("mode4").checked ? true : false
    };
    const data = {
        txt_cnt: mode.mode0,
        txt1: mode.mode1 ? "0123456789" : "",
        txt2: mode.mode2 ? "ABCDEFGHIJKLMNOPQRSTUVWXYZ" : "",
        txt3: mode.mode3 ? "abcdefghijklmnopqrstuvwxyz" : "",
        txt4: mode.mode4 ? "#$&*@+-" : "",
    };


    // console.log(mode,data);

    let str = "";

    if (mode.mode1 || mode.mode2 || mode.mode3 || mode.mode4) {
        let txt_str = data.txt1 + data.txt2 + data.txt3 + data.txt4;
        do {
            str = "";
            for (let i = 1; i <= data.txt_cnt; i++) {
                str = str + txt_str.substr((getRandomInt(txt_str.length) - 1), 1);
            }
        } while ((() => {
            let flg = [];
            flg[0] = mode.mode1 ? /[0-9]/.test(str) : true;
            flg[1] = mode.mode2 ? /[A-Z]/.test(str) : true;
            flg[2] = mode.mode3 ? /[a-z]/.test(str) : true;
            flg[3] = mode.mode4 ? /[#|$|&|*|@|+|\-]/.test(str) : true;
            
            return (() => {
                let f = true;
                for (const key in flg) {
                    if (!flg[key]) {
                        f = false;
                    }
                }
                return f;
            })();
            return false;
        })() === false);
        document.getElementById("view").value = str;
    } else {
        alert("どれかを選択してください");
    }

});
function getRandomInt(max) {
    return Math.floor(Math.random() * max);
}