import json
from ..parser.models import ParsedCurl


def generate_javascript(parsed: ParsedCurl) -> str:
    """Generate JavaScript fetch code from parsed curl command."""
    lines = [
        "async function makeRequest() {",
        f'    const url = "{parsed.url}";',
        "",
    ]
    
    headers_obj = {h.key: h.value for h in parsed.headers}
    if parsed.user_agent:
        headers_obj["User-Agent"] = parsed.user_agent
    
    method_name = parsed.method.value.lower()
    
    if parsed.data:
        if parsed.data.data_type.value == "json":
            lines.append(f"    const jsonData = {json.dumps(parsed.data.json_data, indent=4)};")
            lines.append("")
            lines.append("    const response = await fetch(url, {")
            lines.append(f'        method: "{parsed.method.value}"')
            if headers_obj:
                lines.append("        headers: {")
                for key, value in headers_obj.items():
                    lines.append(f'            "{key}": "{value}",')
                lines.append('            "Content-Type": "application/json"')
            else:
                lines.append('        headers: { "Content-Type": "application/json" },')
            lines.append("        body: JSON.stringify(jsonData)")
            lines.append("    });")
        else:
            lines.append(f"    const body = {repr(parsed.data.content)};")
            lines.append("")
            lines.append("    const response = await fetch(url, {")
            lines.append(f'        method: "{parsed.method.value}"')
            if headers_obj:
                lines.append("        headers: {")
                for key, value in headers_obj.items():
                    lines.append(f'            "{key}": "{value}",')
                lines.append("        },")
            lines.append(f"        body: body")
            lines.append("    });")
    else:
        lines.append("    const response = await fetch(url, {")
        lines.append(f'        method: "{parsed.method.value}"')
        if headers_obj:
            lines.append(",")
            lines.append("        headers: {")
            for key, value in headers_obj.items():
                lines.append(f'            "{key}": "{value}",')
            lines.append("        }")
        lines.append("    });")
    
    lines.extend([
        "",
        "    if (!response.ok) {",
        '        throw new Error(`HTTP error! status: ${response.status}`);',
        "    }",
        "",
        "    const data = await response.json();",
        "    console.log(data);",
        "    return data;",
        "}",
        "",
        "makeRequest().catch(console.error);",
    ])
    
    return "\n".join(lines)