pub fn to_json(vdf_data: &str) -> String {
    let linebreak = match std::env::consts::OS {
        "macos" => "\r",
        "windows" => "\n",
        "linux" => "\n",
        _ => "\n",
    };

    let startpoint = vdf_data.find('{').unwrap_or(0);
    let vdf_data = &vdf_data[startpoint..];

    let lines: Vec<&str> = vdf_data.split(linebreak).collect();
    let mut json_data = String::new();

    for line in lines {
        let mut line = line.trim_end_matches('\r').trim().to_string();

        if line.contains("\"\t\t\"") {
            line = line.replace("\"\t\t\"", "\": \"");
            line.push(',');
        } else if line.contains("\" \"") {
            line = line.replace("\" \"", "\": \"");
            line.push(',');
        }

        line = line
            .replace('{', ": {")
            .replace('\t', "")
            .replace('}', "},");

        json_data.push_str(&line);
    }

    json_data = json_data
        .replace(",}", "}")
        .trim_start_matches(": ")
        .trim_end_matches(',')
        .to_string();

    json_data
}

pub fn to_vdf(json_data: &str) -> String {
    let json_value: serde_json::Value = serde_json::from_str(json_data).unwrap();
    let mut vdf_data = String::new();
    build_vdf(&json_value, &mut vdf_data, 0);
    vdf_data
}

fn build_vdf(json_value: &serde_json::Value, vdf_data: &mut String, indent_level: usize) {
    match json_value {
        serde_json::Value::Object(obj) => {
            for (key, value) in obj {
                vdf_data.push_str(&"\t".repeat(indent_level));
                vdf_data.push_str(&format!("\"{}\"\n", key));
                vdf_data.push_str(&"\t".repeat(indent_level));
                vdf_data.push_str("{\n");
                build_vdf(value, vdf_data, indent_level + 1);
                vdf_data.push_str(&"\t".repeat(indent_level));
                vdf_data.push_str("}\n");
            }
        }
        serde_json::Value::String(s) => {
            vdf_data.push_str(&"\t".repeat(indent_level));
            vdf_data.push_str(&format!("\"{}\"\t\t\"{}\"\n", s, s));
        }
        _ => {
            vdf_data.push_str(&"\t".repeat(indent_level));
            vdf_data.push_str(&format!("\"{}\"\t\t\"{}\"\n", json_value, json_value));
        }
    }
}

mod tests {
    use super::*;

	static VDF_DATA: &str = r#"\"users\"
			{
				\"76561198315078806\"
				{
					\"AccountName\"		\"_jerry_dota2\"
					\"PersonaName\"		\"Rop紫（已黑化）\"
					\"RememberPassword\"		\"1\"
					\"WantsOfflineMode\"		\"0\"
					\"SkipOfflineModeWarning\"		\"0\"
					\"AllowAutoLogin\"		\"1\"
					\"MostRecent\"		\"1\"
					\"Timestamp\"		\"1742706884\"
				}
				\"76561198107125441\"
				{
					\"AccountName\"		\"_im_ai_\"
					\"PersonaName\"		\"Buongiorno\"
					\"RememberPassword\"		\"1\"
					\"WantsOfflineMode\"		\"0\"
					\"SkipOfflineModeWarning\"		\"0\"
					\"AllowAutoLogin\"		\"1\"
					\"MostRecent\"		\"0\"
					\"Timestamp\"		\"1739093763\"
				}
			}
	"#;

	static JSON_DATA: &str = r#"{
		"users": {
			"76561198315078806": {
				"AccountName": "_jerry_dota2",
				"PersonaName": "Rop紫（已黑化）",
				"RememberPassword": "1",
				"WantsOfflineMode": "0",
				"SkipOfflineModeWarning": "0",
				"AllowAutoLogin": "1",
				"MostRecent": "1",
				"Timestamp": "1742706884"
			},
			"76561198107125441": {
				"AccountName": "_im_ai_",
				"PersonaName": "Buongiorno",
				"RememberPassword": "1",
				"WantsOfflineMode": "0",
				"SkipOfflineModeWarning": "0",
				"AllowAutoLogin": "1",
				"MostRecent": "0",
				"Timestamp": "1739093763"
			}
		}
	}"#;


    #[test]
    fn test_to_json() {
        // let expected_json = r#"{"key1": "value1","key2": "value2","subkey": {"key3": "value3"}}"#;
        let json_data = to_json(VDF_DATA);
		println!("{}", json_data);

        // 解析json
        let json_value: serde_json::Value = serde_json::from_str(&json_data).unwrap();

        println!("{}", json_value)
        // assert_eq!(to_json(vdf_data), expected_json);
    }

	#[test]
	fn test_to_vdf() {
		// let json_data = r#"{"key1": "value1","key2": "value2","subkey": {"key3": "value3"}}"#;
		let vdf_data = to_vdf(JSON_DATA);

		println!("{}", vdf_data);
	}
}