// TODO: READ AND UNDERSTAND

package main

import (
	"context"
	"encoding/json"
	"net/http"
)

// GET /quotes
func getQuotes(w http.ResponseWriter, r *http.Request) {
	rows, err := db.Query(context.Background(), "SELECT * FROM hlaskovnik;")
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
	defer rows.Close()

	var quotes []Quote

	for rows.Next() {
		var q Quote
		rows.Scan(&q.Id, &q.Author, &q.Body)
		quotes = append(quotes, q)
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(quotes)
}

// POST /quotes
func createQuote(w http.ResponseWriter, r *http.Request) {
	var q Quote

	err := json.NewDecoder(r.Body).Decode(&q)
	if err != nil {
		http.Error(w, "Invalid JSON", 400)
		return
	}

	err = db.QueryRow(
		context.Background(),
		"INSERT INTO hlaskovnik(author, body) VALUES($1, $2) RETURNING id;",
		q.Author, q.Body,
	).Scan(&q.Id)

	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(q)
}

// DELETE /quotes
func deleteQuote(w http.ResponseWriter, r *http.Request) {
	var q Quote
	err := json.NewDecoder(r.Body).Decode(&q)
	if err != nil {
		http.Error(w, "Invalid JSON", 400)
		return
	}

	err = db.QueryRow(
		context.Background(),
		"DELETE FROM hlaskovnik WHERE id = $1 RETURNING *;",
		q.Id,
	).Scan(&q.Id)
}