package main

import (
	"encoding/json"
	"log"
	"net/http"

	"github.com/slipros/roamer"
	"github.com/slipros/roamer/decoder"
	"github.com/slipros/roamer/formatter"
	"github.com/slipros/roamer/parser"
)

// Define request struct with tags
type CreateUserRequest struct {
	Name      string `json:"name" string:"trim_space"`
	Email     string `json:"email" string:"trim_space,lower"`
	Age       int    `query:"age" numeric:"min=18"`
	UserAgent string `header:"User-Agent"`
}

func main() {
	// Initialize roamer
	r := roamer.NewRoamer(
		roamer.WithDecoders(decoder.NewJSON()),
		roamer.WithParsers(
			parser.NewHeader(),
			parser.NewQuery(),
		),
		roamer.WithFormatters(
			formatter.NewString(),
			formatter.NewNumeric(),
		),
	)

	// Create handler
	http.HandleFunc("/users", func(w http.ResponseWriter, req *http.Request) {
		var userReq CreateUserRequest

		// Parse request
		if err := r.Parse(req, &userReq); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		// Use parsed data
		w.Header().Set("Content-Type", "application/json")
		if err := json.NewEncoder(w).Encode(map[string]any{
			"name":       userReq.Name,
			"email":      userReq.Email,
			"age":        userReq.Age,
			"user_agent": userReq.UserAgent,
		}); err != nil {
			log.Printf("Failed to encode response: %v", err)
			http.Error(w, "Failed to encode response", http.StatusInternalServerError)
			return
		}
	})

	log.Fatal(http.ListenAndServe(":8080", nil))
}

type CustomParser struct{}

func (p *CustomParser) Parse(r *http.Request, tag reflect.StructTag, _ parser.Cache) (any, bool) {
	tagValue, ok := tag.Lookup("custom")
	if !ok {
		return "", false
	}
	// Extract and return value
	return value, true
}

func (p *CustomParser) Tag() string {
	return "custom"
}

type CustomDecoder struct{}

func (d *CustomDecoder) Decode(r *http.Request, ptr any) error {
	// Decode request body into ptr
	return nil
}

func (d *CustomDecoder) ContentType() string {
	return "application/custom"
}

type CustomFormatter struct{}

func (f *CustomFormatter) Format(tag reflect.StructTag, ptr any) error {
	tagValue, ok := tag.Lookup("custom_format")
	if !ok {
		return nil
	}
	// Format the value pointed to by ptr
	return nil
}

func (f *CustomFormatter) Tag() string {
	return "custom_format"
}