package store

import (
	"os"
	"testing"
	"time"

	"git.casaderoll.de/michael/urbm/internal/model"
)

func TestStoreInitializesAndPersists(t *testing.T) {
	dir := t.TempDir()
	s := New(dir)
	if err := s.Init(); err != nil {
		t.Fatal(err)
	}
	c, err := s.LoadConfig()
	if err != nil {
		t.Fatal(err)
	}
	if c.SchemaVersion != model.SchemaVersion {
		t.Fatalf("schema version = %d", c.SchemaVersion)
	}
	info, err := os.Stat(s.configPath())
	if err != nil {
		t.Fatal(err)
	}
	if info.Mode().Perm() != 0600 {
		t.Fatalf("config mode = %o", info.Mode().Perm())
	}
}

func TestBackupMetricsPersistSeparatelyFromRuns(t *testing.T) {
	s := New(t.TempDir())
	if err := s.Init(); err != nil {
		t.Fatal(err)
	}
	finished := time.Date(2026, 7, 13, 1, 30, 0, 0, time.UTC)
	metrics := []model.BackupMetric{{SchemaVersion: model.SchemaVersion, RunID: "run-1", JobID: "job-1", FinishedAt: finished, Status: "success", BytesProcessed: 42, FilesProcessed: 7}}
	if err := s.SaveBackupMetrics(metrics); err != nil {
		t.Fatal(err)
	}
	if err := s.SaveRuns(nil); err != nil {
		t.Fatal(err)
	}
	loaded, legacy, err := s.LoadBackupMetrics()
	if err != nil {
		t.Fatal(err)
	}
	if legacy {
		t.Fatal("compacted metric file was detected as legacy JSON array")
	}
	if len(loaded) != 1 || loaded[0].RunID != "run-1" || loaded[0].BytesProcessed != 42 {
		t.Fatalf("backup metrics = %#v", loaded)
	}
	info, err := os.Stat(s.backupMetricsPath())
	if err != nil {
		t.Fatal(err)
	}
	if info.Mode().Perm() != 0600 {
		t.Fatalf("backup metrics mode = %o", info.Mode().Perm())
	}
}

func TestBackupMetricsMigrateFromJSONArrayAndAppend(t *testing.T) {
	s := New(t.TempDir())
	finished := time.Date(2026, 7, 13, 1, 30, 0, 0, time.UTC)
	legacyJSON := `[{"schemaVersion":1,"runId":"old","jobId":"job-1","finishedAt":"2026-07-13T01:30:00Z","status":"success","bytesProcessed":42,"filesProcessed":7}]`
	if err := os.WriteFile(s.legacyBackupMetricsPath(), []byte(legacyJSON), 0600); err != nil {
		t.Fatal(err)
	}
	metrics, legacy, err := s.LoadBackupMetrics()
	if err != nil {
		t.Fatal(err)
	}
	if !legacy || len(metrics) != 1 || metrics[0].RunID != "old" {
		t.Fatalf("legacy metrics = %#v, legacy = %v", metrics, legacy)
	}
	if err := s.SaveBackupMetrics(metrics); err != nil {
		t.Fatal(err)
	}
	if err := s.AppendBackupMetric(model.BackupMetric{SchemaVersion: model.SchemaVersion, RunID: "new", JobID: "job-1", FinishedAt: finished.Add(time.Hour), Status: "success"}); err != nil {
		t.Fatal(err)
	}
	metrics, legacy, err = s.LoadBackupMetrics()
	if err != nil {
		t.Fatal(err)
	}
	if legacy || len(metrics) != 2 || metrics[1].RunID != "new" {
		t.Fatalf("appended metrics = %#v, legacy = %v", metrics, legacy)
	}
}