package main

import (
	"io/ioutil"
	"os"
	"testing"
)

var db *DB

func initTestCase(t *testing.T) {
	os.Setenv("PGDATABASE", "levyraati_test")
	os.Setenv("PGUSER", "levyraati_test")
	os.Setenv("PGPASSWORD", "levyraati_test")
	db = InitDatabase()

	execSQLFile(t, "sql/clear-schema.sql")
	execSQLFile(t, "sql/database.sql")
	execSQLFile(t, "sql/database-test.sql")
}

func execSQLFile(t *testing.T, filename string) {
	data, err := ioutil.ReadFile(filename)
	if err != nil {
		t.Fatal("Unable to read setup file", filename)
	}
	_, err = db.database.Exec(string(data))
	if err != nil {
		t.Fatal("Unable to setup database", err)
	}
}

func TestDbConnWorks(t *testing.T) {
	initTestCase(t)
	if db == nil {
		t.Error("Database not initialized")
	}
}

func TestFindAllEntries(t *testing.T) {
	initTestCase(t)

	songs, err := db.FindAllEntries("Lamperi")
	if err != nil {
		t.Error("Error while searching for entries")
	}
	if len(songs) != 52 {
		t.Error("Should have found 52 entries, got", len(songs))
	}
}

func TestFindAllPanels(t *testing.T) {
	initTestCase(t)

	panels, err := db.FindAllPanels()
	if err != nil {
		t.Error("Error while searching for panels", err)
	}
	if len(panels) != 1 {
		t.Error("Should have found 1 panel, got", len(panels))
	}
}

func TestFindPlaylistBySection(t *testing.T) {
	initTestCase(t)

	playlistEntries, err := db.FindPlaylistBySection("Viikko 07")
	if err == nil || err.Error() != "sql: no rows in result set" {
		t.Error("err should be 'sql: no rows in result set'")
	}
	if len(playlistEntries) != 0 {
		t.Error("Should have found 0 playlistEntries, got", len(playlistEntries))
	}
}

func TestUpdatePlaylistBySection(t *testing.T) {
	initTestCase(t)

	updated, err := db.UpdatePlaylistBySection("Viikko 07", []string{"ID1", "ID2", "ID3", "ID4"})
	if err != nil {
		t.Error("Error while updating for panels", err)
	}
	if !updated {
		t.Error("Could not update section")
	}
	playlistEntries, err := db.FindPlaylistBySection("Viikko 07")
	if err != nil {
		t.Error("Error while searching for playlist", err)
	}
	if len(playlistEntries) != 4 {
		t.Error("Should have found 4 playlistEntries, got", len(playlistEntries))
	}
	if playlistEntries[0] != "ID1" {
		t.Error("Should have been ID1, got ", playlistEntries[0])
	}
	if playlistEntries[1] != "ID2" {
		t.Error("Should have been ID2, got ", playlistEntries[1])
	}
	if playlistEntries[2] != "ID3" {
		t.Error("Should have been ID3, got ", playlistEntries[2])
	}
	if playlistEntries[3] != "ID4" {
		t.Error("Should have been ID4, got ", playlistEntries[3])
	}
}
func TestUpdatePlaylistBySectionUnknownSection(t *testing.T) {
	initTestCase(t)

	updated, err := db.UpdatePlaylistBySection("Viikko joskus", []string{"ID1", "ID2", "ID3", "ID4"})
	if err != nil {
		t.Error("Error while updating for panels", err)
	}
	if updated {
		t.Error("Should not update unknown section")
	}
	_, err = db.FindPlaylistBySection("Viikko joskus")
	if err == nil {
		t.Error("Should be error with unknown section", err)
	}
}