package protocol

import (

"fmt"

"strings"

)

// PatternInfo is an interface for types that represent glob patterns

type PatternInfo interface {

GetPattern() string

GetBasePath() string

isPattern() // marker method

}

// StringPattern implements PatternInfo for string patterns

type StringPattern struct {

Pattern string

}

func (p StringPattern) GetPattern() string { return p.Pattern }

func (p StringPattern) GetBasePath() string { return "" }

func (p StringPattern) isPattern() {}

// RelativePatternInfo implements PatternInfo for RelativePattern

type RelativePatternInfo struct {

RP RelativePattern

BasePath string

}

func (p RelativePatternInfo) GetPattern() string { return string(p.RP.Pattern) }

func (p RelativePatternInfo) GetBasePath() string { return p.BasePath }

func (p RelativePatternInfo) isPattern() {}

// AsPattern converts GlobPattern to a PatternInfo object

func (g *GlobPattern) AsPattern() (PatternInfo, error) {

if g.Value == nil {

return nil, fmt.Errorf("nil pattern")

}

switch v := g.Value.(type) {

case string:

return StringPattern{Pattern: v}, nil

case RelativePattern:

// Handle BaseURI which could be string or DocumentUri

basePath := ""

switch baseURI := v.BaseURI.Value.(type) {

case string:

basePath = strings.TrimPrefix(baseURI, "file://")

case DocumentUri:

basePath = strings.TrimPrefix(string(baseURI), "file://")

default:

return nil, fmt.Errorf("unknown BaseURI type: %T", v.BaseURI.Value)

}

return RelativePatternInfo{RP: v, BasePath: basePath}, nil

default:

return nil, fmt.Errorf("unknown pattern type: %T", g.Value)

}

}