package cif

import (
	"testing"
	"time"

	"git.fjla.uk/owlboard/go-types/pkg/upstreamApi"
	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
)

func TestGenerateMetadata(t *testing.T) {
	header := &upstreamApi.JsonTimetableV1{
		Classification: "public",
		Timestamp:      1711227636,
		Owner:          "Network Rail",
		Sender: upstreamApi.TimetableSender{
			Organisation: "Rockshore",
			Application:  "NTROD",
			Component:    "SCHEDULE",
		},
		Metadata: upstreamApi.TimetableMetadata{
			Type:     "update",
			Sequence: 4307,
		},
	}

	expected := &dbAccess.CifMetadata{
		Doctype:       dbAccess.Doctype,
		LastTimestamp: header.Timestamp,
		LastSequence:  header.Metadata.Sequence,
		LastUpdate:    time.Now().In(londonTimezone),
	}

	result := generateMetadata(header)

	if result == nil {
		t.Errorf("generateMetadata returned nil pointer")
		return // Static type checking likes this return to be here, even if it is redundant in reality.
	}

	if result.Doctype != expected.Doctype {
		t.Errorf("Doctype: expected %s, got %s", expected.Doctype, result.Doctype)
	}

	if result.LastTimestamp != expected.LastTimestamp {
		t.Errorf("LastTimestamp: expected %d, got %d", expected.LastTimestamp, result.LastTimestamp)
	}

	if result.LastSequence != expected.LastSequence {
		t.Errorf("LastSequence: expected %d, got %d", expected.LastSequence, result.LastSequence)
	}

	tolerance := time.Second
	if !result.LastUpdate.Before(expected.LastUpdate.Add(tolerance)) ||
		!result.LastUpdate.After(expected.LastUpdate.Add(-tolerance)) {
		t.Errorf("LastUpdate: expected %s, got %s", expected.LastUpdate, result.LastUpdate)
	}
}

func TestIsAfterYesterdayAt0600(t *testing.T) {
	yesterday0600 := time.Now().In(londonTimezone).AddDate(0, 0, -1).Truncate(24 * time.Hour).Add(6 * time.Hour)

	testCases := []struct {
		input  time.Time
		expect bool
	}{
		{yesterday0600.Add(-1 * time.Hour), false},
		{yesterday0600.Add(-12 * time.Hour), false},
		{yesterday0600.Add(-24 * time.Hour), false},
		{yesterday0600.Add(1 * time.Microsecond), true},
		{yesterday0600.Add(1 * time.Hour), true},
		{yesterday0600.Add(12 * time.Hour), true},
		{yesterday0600.Add(24 * time.Hour), true},
	}

	for _, tc := range testCases {
		result := isAfterYesterdayAt0600(tc.input)
		if result != tc.expect {
			t.Errorf("For input %v, expected %t, but got %t", tc.input, tc.expect, result)
		}
	}
}

func TestIsTimestampWithinLastFiveDays(t *testing.T) {
	testCases := []struct {
		name   string
		ts     int64
		expect bool
	}{
		{"WithinLastFiveDays", time.Now().AddDate(0, 0, -3).Unix(), true},
		{"ExactlyFiveDaysAgo", time.Now().AddDate(0, 0, -5).Unix(), false}, //False due to elapsed time during test
		{"MoreThanFiveDaysAgo", time.Now().AddDate(0, 0, -7).Unix(), false},
	}

	for _, tc := range testCases {
		result := isTimestampWithinLastFiveDays(tc.ts)
		if result != tc.expect {
			t.Errorf("For %s (%d), expected %t, but got %t", tc.name, tc.ts, tc.expect, result)
		}
	}
}