// We'll use these two objects to demonstrate encoding and
// decoding of custom types below.
const response1 = {
    page: 1,
    fruits: ['apple', 'peach', 'pear']
};

const response2 = {
    page: 1,
    fruits: ['apple', 'peach', 'pear']
};

function main() {
    // First we'll look at encoding basic data types to
    // JSON strings. Here are some examples for atomic
    // values.
    console.log(JSON.stringify(true));
    console.log(JSON.stringify(1));
    console.log(JSON.stringify(2.34));
    console.log(JSON.stringify("gopher"));

    // And here are some for slices and maps, which encode
    // to JSON arrays and objects as you'd expect.
    const slcD = ["apple", "peach", "pear"];
    console.log(JSON.stringify(slcD));

    const mapD = { "apple": 5, "lettuce": 7 };
    console.log(JSON.stringify(mapD));

    // The JSON.stringify method can automatically encode your
    // custom data types.
    console.log(JSON.stringify(response1));
    console.log(JSON.stringify(response2));

    // Now let's look at decoding JSON data into JavaScript
    // values. Here's an example for a generic data
    // structure.
    const byt = '{"num":6.13,"strs":["a","b"]}';

    // Here's the actual decoding, and a check for
    // associated errors.
    try {
        const dat = JSON.parse(byt);
        console.log(dat);

        // We can access the values in the decoded object
        // directly without type assertions.
        const num = dat.num;
        console.log(num);

        const strs = dat.strs;
        const str1 = strs[0];
        console.log(str1);
    } catch (error) {
        console.error("Error parsing JSON:", error);
    }

    // We can also decode JSON into custom data types.
    // This has the advantage of adding additional
    // type-safety to our programs when using TypeScript.
    const str = '{"page": 1, "fruits": ["apple", "peach"]}';
    const res = JSON.parse(str);
    console.log(res);
    console.log(res.fruits[0]);

    // In JavaScript, we can directly stringify objects to JSON
    // and write them to streams or files.
    const d = { "apple": 5, "lettuce": 7 };
    console.log(JSON.stringify(d));
}

main();