/* OpenBills-server - Server for libre billing software OpenBills-web
 * Copyright (C) 2022  Vidhu Kant Sharma <vidhukant@vidhukant.xyz>

 * This program 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
 * (at your option) any later version.

 * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package invoice

import (
	"errors"
	"github.com/gin-gonic/gin"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"log"
	"net/http"
)

func getAll(ctx *gin.Context) {
	// TODO: add functionality to filter results
	invoices, err := getInvoices(nil)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		log.Printf("ERROR: Failed to read invoices from DB: %v\n", err.Error())
		return
	}

	ctx.JSON(http.StatusOK, invoices)
}

func get(ctx *gin.Context) {
	id, err := primitive.ObjectIDFromHex(ctx.Param("invoiceId"))
	if err != nil {
		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		log.Printf("ERROR: Failed to get invoice with ID, Error parsing ID: %v\n", err.Error())
		return
	}

	invoice, err := getInvoiceById(id)
	if err != nil {
		if errors.Is(err, mongo.ErrNoDocuments) {
			ctx.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
		} else {
			ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		}
		log.Printf("ERROR: Failed to read invoice %v from DB: %v\n", id, err.Error())
		return
	}

	ctx.JSON(http.StatusOK, invoice)
}

func save(ctx *gin.Context) {
	var i Invoice
	ctx.BindJSON(&i)
	_, err := saveInvoice(i)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		log.Printf("ERROR: Failed to add new invoice %v to DB: %v\n", i, err.Error())
		return
	}

	log.Printf("Successfully created new Invoice: %v", i)
	ctx.JSON(http.StatusOK, nil)
}

func remove(ctx *gin.Context) {
	id := ctx.Param("invoiceId")
	objectId, err := primitive.ObjectIDFromHex(id)
	if err != nil {
		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		log.Printf("ERROR: Failed to delete invoice, Error parsing ID: %v\n", err.Error())
		return
	}

	err = deleteInvoice(objectId)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		log.Printf("ERROR: Failed to delete invoice %v: %v\n", objectId, err.Error())
		return
	}

	log.Printf("Deleted invoice %v from database.\n", objectId)
	ctx.JSON(http.StatusOK, nil)
}