package components

type Location struct {
	Modifier  string
	Match     string
	Cache     bool
	ProxyPass string
	Host      string
	CacheTime string

	Comment    string
	Directives []IDirective
	Line       int
	Parameters []string
}

func NewLocation(directive IDirective) *Location {
	location := &Location{
		Modifier: "",
		Match:    "",
	}
	directives := make([]IDirective, 0)
	if len(directive.GetParameters()) == 0 {
		panic("no enough parameter for location")
	}
	for _, dir := range directive.GetBlock().GetDirectives() {
		directives = append(directives, dir)
		params := dir.GetParameters()
		switch dir.GetName() {
		case "proxy_pass":
			location.ProxyPass = params[0]
		case "proxy_set_header":
			if params[0] == "Host" {
				location.Host = params[1]
			}
		case "proxy_cache":
			location.Cache = true
		case "if":
			if params[0] == "(" && params[1] == "$uri" && params[2] == "~*" {
				dirs := dir.GetBlock().GetDirectives()
				for _, di := range dirs {
					if di.GetName() == "expires" {
						location.CacheTime = di.GetParameters()[0]
					}
				}
			}
		}
	}

	params := directive.GetParameters()
	if len(params) == 1 {
		location.Match = params[0]
	} else if len(params) == 2 {
		location.Match = params[1]
		location.Modifier = params[0]
	}
	location.Parameters = directive.GetParameters()
	location.Line = directive.GetLine()
	location.Comment = directive.GetComment()
	location.Directives = directives
	return location
}

func (l *Location) GetName() string {
	return "location"
}

func (l *Location) GetParameters() []string {
	return l.Parameters
}

func (l *Location) GetBlock() IBlock {
	return l
}

func (l *Location) GetComment() string {
	return l.Comment
}

func (l *Location) GetLine() int {
	return l.Line
}

func (l *Location) GetDirectives() []IDirective {
	return l.Directives
}

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

func (l *Location) UpdateDirective(key string, params []string) {
	if key == "" || len(params) == 0 {
		return
	}
	directives := l.Directives
	index := -1
	for i, dir := range directives {
		if dir.GetName() == key {
			if IsRepeatKey(key) {
				oldParams := dir.GetParameters()
				if !(len(oldParams) > 0 && oldParams[0] == params[0]) {
					continue
				}
			}
			index = i
			break
		}
	}
	newDirective := &Directive{
		Name:       key,
		Parameters: params,
	}
	if index > -1 {
		directives[index] = newDirective
	} else {
		directives = append(directives, newDirective)
	}
	l.Directives = directives
}

func (l *Location) RemoveDirective(key string, params []string) {
	directives := l.Directives
	var newDirectives []IDirective
	for _, dir := range directives {
		if dir.GetName() == key {
			if len(params) > 0 {
				oldParams := dir.GetParameters()
				if oldParams[0] == params[0] {
					continue
				}
			} else {
				continue
			}
		}
		newDirectives = append(newDirectives, dir)
	}
	l.Directives = newDirectives
}

func (l *Location) ChangePath(Modifier string, Match string) {
	if Match != "" && Modifier != "" {
		l.Parameters = []string{Modifier, Match}
	}
	if Match != "" && Modifier == "" {
		l.Parameters = []string{Match}
	}
	l.Modifier = Modifier
	l.Match = Match
}

func (l *Location) AddCache(cacheTime string) {
	l.RemoveDirective("add_header", []string{"Cache-Control", "no-cache"})
	directives := l.GetDirectives()
	newDir := &Directive{
		Name:       "if",
		Parameters: []string{"(", "$uri", "~*", `"\.(gif|png|jpg|css|js|woff|woff2)$"`, ")"},
		Block:      &Block{},
	}
	block := &Block{}
	block.Directives = append(block.Directives, &Directive{
		Name:       "expires",
		Parameters: []string{cacheTime},
	})
	newDir.Block = block
	directives = append(directives, newDir)
	l.Directives = directives
	l.UpdateDirective("proxy_ignore_headers", []string{"Set-Cookie", "Cache-Control", "expires"})
	l.UpdateDirective("proxy_cache", []string{"proxy_cache_panel"})
	l.UpdateDirective("proxy_cache_key", []string{"$host$uri$is_args$args"})
	l.UpdateDirective("proxy_cache_valid", []string{"200", "304", "301", "302", "10m"})
	l.Cache = true
	l.CacheTime = cacheTime
}

func (l *Location) RemoveCache() {
	l.RemoveDirective("if", []string{"(", "$uri", "~*", `"\.(gif|png|jpg|css|js|woff|woff2)$"`, ")"})
	l.RemoveDirective("proxy_ignore_headers", []string{"Set-Cookie"})
	l.RemoveDirective("proxy_cache", []string{"proxy_cache_panel"})
	l.RemoveDirective("proxy_cache_key", []string{"$host$uri$is_args$args"})
	l.RemoveDirective("proxy_cache_valid", []string{"200"})

	l.UpdateDirective("add_header", []string{"Cache-Control", "no-cache"})

	l.CacheTime = ""
	l.Cache = false
}