package components

import (
	"errors"
)

type Server struct {
	Comment    string
	Listens    []*ServerListen
	Directives []IDirective
}

func NewServer(directive IDirective) (*Server, error) {
	server := &Server{}
	if block := directive.GetBlock(); block != nil {
		server.Comment = block.GetComment()
		directives := block.GetDirectives()
		for _, dir := range directives {
			if dir.GetName() == "listen" {
				server.Listens = append(server.Listens, NewServerListen(dir.GetParameters()))
			} else {
				server.Directives = append(server.Directives, dir)
			}
		}
		return server, nil
	}
	return nil, errors.New("server directive must have a block")
}

func (s *Server) GetName() string {
	return "server"
}

func (s *Server) GetParameters() []string {
	return []string{}
}

func (s *Server) GetBlock() IBlock {
	return s
}

func (s *Server) GetComment() string {
	return s.Comment
}

func (s *Server) GetDirectives() []IDirective {
	directives := make([]IDirective, 0)
	for _, ls := range s.Listens {
		directives = append(directives, ls)
	}
	directives = append(directives, s.Directives...)
	return directives
}

func (s *Server) AddListen(bind string, defaultServer bool, params ...string) {
	listen := &ServerListen{
		Bind:       bind,
		Parameters: params,
	}
	if defaultServer {
		listen.DefaultServer = DefaultServer
	}
	s.Listens = append(s.Listens, listen)
}

func (s *Server) RemoveListenByBind(bind string) {
	index := 0
	listens := s.Listens
	for _, listen := range s.Listens {
		if listen.Bind != bind || len(listen.Parameters) > 0 {
			listens[index] = listen
			index++
		}
	}
	s.Listens = listens
}

func (s *Server) FindDirectives(directiveName string) []IDirective {
	directives := make([]IDirective, 0)
	for _, directive := range s.Directives {
		if directive.GetName() == directiveName {
			directives = append(directives, directive)
		}
		if directive.GetBlock() != nil {
			directives = append(directives, directive.GetBlock().FindDirectives(directiveName)...)
		}
	}

	return directives
}

func (s *Server) UpdateDirectives(directiveName string, directive Directive) {
	directives := make([]IDirective, 0)
	for _, dir := range s.Directives {
		if dir.GetName() == directiveName {
			directives = append(directives, &directive)
		} else {
			directives = append(directives, dir)
		}
	}
	s.Directives = directives
}

func (s *Server) AddDirectives(directive Directive) {
	directives := append(s.Directives, &directive)
	s.Directives = directives
}