package main

import (
	"crypto/sha512"
	"encoding/json"
	"fmt"
	"log"
	"strconv"
	"strings"

	"github.com/fasthttp/router"
	"github.com/valyala/fasthttp"
)

func RunWebserv() {
	r := router.New()
	r.GET("/", Start)
	r.GET("/api/season", Season)
	r.POST("/api/register", Register)
	log.Fatal(fasthttp.ListenAndServe(":"+strconv.Itoa(*webServerPort), r.Handler))
}

func Start(ctx *fasthttp.RequestCtx) {
	data, err := cache.Get(seasonApiJikan)
	if err != nil {
		addErrorToCtx(ctx, err)
		return
	}
	var seasonData SeasonJikan
	err = json.Unmarshal(data, &seasonData)
	if err != nil {
		addErrorToCtx(ctx, err)
		return
	}

	WriteIndex(ctx, &seasonData)

	ctx.SetContentType("text/html; charset=utf-8")
	ctx.SetStatusCode(fasthttp.StatusOK)
}

func Season(ctx *fasthttp.RequestCtx) {
	data, err := cache.Get(seasonApiJikan)
	if err != nil {
		addErrorToCtx(ctx, err)
		return
	}
	var seasonData SeasonJikan
	err = json.Unmarshal(data, &seasonData)
	if err != nil {
		addErrorToCtx(ctx, err)
		return
	}

	_, err = ctx.Write(data)
	if err != nil {
		addErrorToCtx(ctx, err)
		return
	}

	ctx.SetContentType("application/json; charset=utf-8")
	ctx.SetStatusCode(fasthttp.StatusOK)
}

func Register(ctx *fasthttp.RequestCtx) {
	if string(ctx.Request.Header.ContentType()) != "application/json" {
		ctx.SetStatusCode(fasthttp.StatusBadRequest)
		return
	}
	body := ctx.PostBody()
	var register RegisterData
	err := json.Unmarshal(body, &register)
	if err != nil {
		ctx.WriteString(err.Error())
		ctx.SetStatusCode(fasthttp.StatusBadRequest)
		return
	}
	if register.MalId == 0 || register.Username == "" || register.Sauce == "" {
		ctx.WriteString("Sprich JSON du Hurensohn")
		ctx.SetStatusCode(fasthttp.StatusBadRequest)
		return
	}
	calcSauce := fmt.Sprintf("%x", sha512.Sum512([]byte(registerSecret+strconv.Itoa(register.MalId)+register.Username)))
	if calcSauce != strings.ToLower(register.Sauce) {
		ctx.WriteString("Möge die Sauce mit dir sein")
		ctx.SetStatusCode(fasthttp.StatusBadRequest)
		return
	}
	// TODO REGISTER
	ctx.SetBody(body)
	ctx.SetStatusCode(fasthttp.StatusOK)
}

func addErrorToCtx(ctx *fasthttp.RequestCtx, err error) {
	ctx.WriteString(err.Error())
	ctx.SetStatusCode(fasthttp.StatusInternalServerError)
}