package snap

import (
	"encoding/json"
	"io/ioutil"
	"net/http"
	"strconv"

	"git.thirdmartini.com/pub/snap/auth"
)

type Context struct {
	srv  *Server
	auth *auth.AuthData

	w    http.ResponseWriter
	r    *http.Request
	vars map[string]string
}

type SnapContent struct {
	User    string
	Theme   string
	Content interface{}
}

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

func (c *Context) Writer() http.ResponseWriter {
	return c.w
}

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

func (c *Context) Error(code int, msg string) {
	c.srv.renderError(c.w, code, msg)
}

func (c *Context) Reply(msg string) {
	c.srv.reply(c.w, msg)
}

func (c *Context) ReplyObject(obj interface{}) {
	msg, err := json.Marshal(obj)
	if err != nil {
		c.Error(400, "Internal Server Error")
	}
	c.Reply(string(msg))
}

func (c *Context) GetObject(obj interface{}) error {
	data, err := ioutil.ReadAll(c.r.Body)
	defer c.r.Body.Close()
	if err != nil {
		return err
	}
	return json.Unmarshal(data, obj)
}

func (c *Context) Render(tmpl string, content interface{}) {
	c.srv.render(c.w, tmpl, content)
}

func (c *Context) RenderEx(tmpl string, content interface{}) {
	cnt := SnapContent{
		User:    c.GetUser(),
		Theme:   c.srv.theme,
		Content: content,
	}
	c.srv.render(c.w, tmpl, &cnt)
}

func (c *Context) GetVar(k string) (string, bool) {
	v, ok := c.vars[k]
	return v, ok
}

func (c *Context) GetVarDefault(k string, def string) string {
	v, ok := c.vars[k]
	if !ok {
		return def
	}
	return v
}

func (c *Context) ParseForm() error {
	return c.r.ParseForm()
}

func (c *Context) FormValue(k string) string {
	return c.r.FormValue(k)
}

func (c *Context) FormValueUint64(k string) uint64 {
	str := c.r.FormValue(k)

	val, err := strconv.ParseUint(str, 10, 64)
	if err != nil {
		return 0
	}

	return val
}

func (c *Context) Redirect(url string) {
	http.Redirect(c.w, c.r, url, http.StatusSeeOther)
}

func (c *Context) QueryValue(key string) string {
	return c.r.URL.Query().Get(key)
}