package snap

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

	"github.com/gorilla/mux"

	"git.twelvetwelve.org/library/snap/auth"
)

type ServiceRequest struct {
	r     *http.Request
	auth  *auth.AuthData
	vars  *Vars
	form  *Form
	query *Query
}

func (c *ServiceRequest) GetUser() string {
	if c.auth == nil {
		return ""
	}
	return c.auth.User
}

func (c *ServiceRequest) ReplyMessage(code int, msg string) *ServiceResponse {
	return &ServiceResponse{
		Code:    code,
		Message: []byte(msg),
	}
}

func (c *ServiceRequest) ReplyObject(code int, obj interface{}) *ServiceResponse {
	var err error
	resp := &ServiceResponse{
		Code: code,
	}

	resp.Message, err = json.Marshal(obj)
	if err != nil {
		resp.Code = http.StatusInternalServerError
		resp.Message = []byte("Internal Server Error")

	}

	compact := c.r.Header.Get("Compact")
	if compact == "" {
		var pretty bytes.Buffer
		err := json.Indent(&pretty, resp.Message, "", "   ")
		if err == nil {
			resp.Message = pretty.Bytes()
		}
	}
	return resp
}

func (c *ServiceRequest) GetObject(object interface{}) error {
	decoder := json.NewDecoder(c.r.Body)
	return decoder.Decode(object)
}

func (c *ServiceRequest) Form() (*Options, error) {
	if c.form != nil {
		return &Options{
			kv: c.form,
		}, nil
	}

	err := c.r.ParseForm()
	if err != nil {
		return nil, err
	}
	c.form = &Form{
		r: c.r,
	}

	return &Options{
		kv: c.form,
	}, nil
}

func (c *ServiceRequest) Query() *Options {
	if c.query != nil {
		return &Options{
			kv: c.query,
		}
	}

	c.query = &Query{
		Values: c.r.URL.Query(),
	}
	return &Options{
		kv: c.query,
	}
}

func (c *ServiceRequest) Vars() *Options {
	if c.vars != nil {
		return &Options{
			kv: c.vars,
		}
	}

	c.vars = &Vars{
		vars: mux.Vars(c.r),
	}
	return &Options{
		kv: c.vars,
	}
}

// Options get compound options
func (c *ServiceRequest) Options() *Options {
	opts := &CompoundOptions{}

	opts.kvs = append(opts.kvs, &Vars{
		vars: mux.Vars(c.r),
	})

	opts.kvs = append(opts.kvs, &Query{
		Values: c.r.URL.Query(),
	})

	err := c.r.ParseForm()
	if err == nil {
		opts.kvs = append(opts.kvs, &Form{
			r: c.r,
		})
	}

	return &Options{
		kv: opts,
	}
}

func (c *ServiceRequest) GetRequest() *http.Request {
	return c.r
}