index.v

import (
	os
	net
	net.urllib
)

const (
	methods_with_form = ['POST', 'PUT', 'GET', 'DELETE', 'HEAD']
	HEADER_SERVER = 'Server: VWeb\r\n' // TODO add to the headers
	HTTP_404 = 'HTTP/1.1 404 Not Found\r\nContent-Type: text/plain\r\n\r\n404 Not Found'
	HTTP_500 = 'HTTP/1.1 500 Internal Server Error\r\nContent-Type: text/plain\r\n\r\n500 Internal Server Error'
)

struct Request {
	mut:
		url string
		method string
		headers map[string]string
		body string
}

fn (request	mut Request) parse_headers(data []string) {
	for i, raw in data {
		if i == 0 {
			continue
		}
		header_raw := raw.split(': ')
		if header_raw.len != 2 {
			continue
		}
		request.headers[header_raw[0]] = header_raw[1]
	}
}

pub fn api(port int) {
	socket := net.listen(port) or {
		panic(err)
	}
	mut req := Request{}
	for {
		connection := socket.accept() or {
			panic(err)
		}
		request_body := connection.read_line()
		if request_body == '' {
			connection.write(HTTP_500)
			connection.close()
			return
		}
		payload := request_body.split("\r\n")
		req.method = payload[0].split(" ")[0]
		req.url = payload[0].split(" ")[1]
		req.parse_headers(payload)
		req.body = payload[payload.len - 1]
		println("$req.method $req.url -- --")
		
		mut data := ''

		match '$req.method $req.url' {
			'GET /api/man' => { data = hello(req) }
			else => { data = HTTP_404 }
		}
		connection.write(data)
		connection.close()
	}
}

fn main(){
	api(8000)
}

fn hello(request Request) string {
	return 'HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\nI am a sample'
}