// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package config

import (
	"context"
	"encoding/json"
	"net/url"
	"fmt"
	"decl/internal/data"
	"decl/internal/folio"
	"decl/internal/codec"
	"io"
)

func init() {
	folio.DocumentRegistry.ConfigurationTypes.Register([]string{"generic"}, func(u *url.URL) data.Configuration {
		g := NewGeneric[any]()
		return g
	})
}

type Generic[Value any] map[string]Value

func NewGeneric[Value any]() *Generic[Value] {
	g := make(Generic[Value])
	return &g
}

func (g *Generic[Value]) URI() string {
	return fmt.Sprintf("%s://%s", g.Type(), "")
}

func (g *Generic[Value]) SetURI(uri string) error {
	return nil
}

func (g *Generic[Value]) SetParsedURI(uri data.URIParser) error {
	return nil
}

func (g *Generic[Value]) Load(r io.Reader) (err error) {
	err = codec.NewYAMLDecoder(r).Decode(g)
	if err == nil {
		_, err = g.Read(context.Background())
	}
	return err
}

func (g *Generic[Value]) LoadYAML(yamlData string) (err error) {
	err = codec.NewYAMLStringDecoder(yamlData).Decode(g)
	if err == nil {
		_, err = g.Read(context.Background())
	}
	return err
}

func (g *Generic[Value]) Clone() data.Configuration {
	jsonGeneric, _ := json.Marshal(g)
	clone := NewGeneric[Value]()
	if unmarshalErr := json.Unmarshal(jsonGeneric, clone); unmarshalErr != nil {
		panic(unmarshalErr)
	}
	return clone
}

func (g *Generic[Value]) Type() string {
	return "generic"
}

func (g *Generic[Value]) Read(context.Context) ([]byte, error) {
	return nil, nil
}

func (g *Generic[Value]) GetValue(name string) (result any, err error) {
	var ok bool
	if result, ok = (*g)[name]; !ok {
		err = data.ErrUnknownConfigurationKey
	}
	return
}

func (g *Generic[Value]) Has(key string) (ok bool) {
	_, ok = (*g)[key]
	return
}