//
//  rhimportd
//
//  The Radio Helsinki Rivendell Import Daemon
//
//
//  Copyright (C) 2015 Christian Pointner <equinox@helsinki.at>
//
//  This file is part of rhimportd.
//
//  rhimportd is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  any later version.
//
//  rhimportd is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with rhimportd. If not, see <http://www.gnu.org/licenses/>.
//

package main

import (
	"encoding/json"
	"fmt"
	"helsinki.at/rhimport"
	"html"
	"net/http"
	_ "net/http/pprof"
)

type webSimpleRequestData struct {
	UserName           string `json:"LOGIN_NAME"`
	Password           string `json:"PASSWORD"`
	GroupName          string `json:"GROUP_NAME"`
	Cart               int    `json:"CART_NUMBER"`
	Cut                int    `json:"CUT_NUMBER"`
	Channels           int    `json:"CHANNELS"`
	NormalizationLevel int    `json:"NORMALIZATION_LEVEL"`
	AutotrimLevel      int    `json:"AUTOTRIM_LEVEL"`
	UseMetaData        bool   `json:"USE_METADATA"`
	SourceUri          string `json:"SOURCE_URI"`
}

type webSimpleResponseData struct {
	ResponseCode int    `json:"REPONSE_CODE"`
	ErrorString  string `json:"ERROR_STRING"`
}

func webSimpleErrorResponse(w http.ResponseWriter, code int, error_str string) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusInternalServerError)
	encoder := json.NewEncoder(w)
	respdata := webSimpleResponseData{code, error_str}
	encoder.Encode(respdata)
}

func webSimpleResponse(w http.ResponseWriter) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusInternalServerError)
	encoder := json.NewEncoder(w)
	respdata := webSimpleResponseData{200, "SUCCESS"}
	encoder.Encode(respdata)
}

func webSimpleParseRequest(conf *rhimport.Config, rddb *rhimport.RDDB, trusted bool, r *http.Request) (ctx *rhimport.ImportContext, err error) {

	decoder := json.NewDecoder(r.Body)
	var reqdata webSimpleRequestData
	if jsonerr := decoder.Decode(&reqdata); jsonerr != nil {
		err = fmt.Errorf("Error parsing JSON response: %s", jsonerr)
		return
	}

	username := reqdata.UserName
	if trusted {
		username = r.Header.Get("X-Forwarded-User")
	}
	ctx = rhimport.NewImportContext(conf, rddb, username, reqdata.GroupName)
	ctx.Password = reqdata.Password
	ctx.Trusted = trusted
	ctx.Cart = reqdata.Cart
	ctx.Cut = reqdata.Cut
	ctx.Channels = reqdata.Channels
	ctx.NormalizationLevel = reqdata.NormalizationLevel
	ctx.AutotrimLevel = reqdata.AutotrimLevel
	ctx.UseMetaData = reqdata.UseMetaData
	ctx.SourceUri = reqdata.SourceUri
	return
}

func webSimpleHandler(conf *rhimport.Config, rddb *rhimport.RDDB, trusted bool, w http.ResponseWriter, r *http.Request) {
	rhdl.Printf("SimpleHandler: request for '%s'", html.EscapeString(r.URL.Path))

	var ctx *rhimport.ImportContext
	var err error
	if ctx, err = webSimpleParseRequest(conf, rddb, trusted, r); err != nil {
		webSimpleErrorResponse(w, http.StatusInternalServerError, err.Error())
		return
	}

	if err := rhimport.FetchFile(ctx); err != nil {
		webSimpleErrorResponse(w, http.StatusInternalServerError, err.Error())
		return
	}

	if err := rhimport.ImportFile(ctx); err != nil {
		webSimpleErrorResponse(w, http.StatusInternalServerError, err.Error())
		return
	}

	webSimpleResponse(w)
	return
}