package creator

import (
	"errors"
	"os"
	"path/filepath"
	"testing"
	"time"
)

func TestWorkCoversUseUIDWorkIDFilesForOwnedAndCompetitor(t *testing.T) {
	store, accounts, ctx := openCreatorIntegrationStore(t)
	accountID := createIntegrationAccount(t, ctx, accounts, "cover-files")
	owned, err := accounts.GetAccount(ctx, accountID)
	if err != nil {
		t.Fatal(err)
	}
	competitor, err := store.CreateCompetitor(ctx, CompetitorInput{Platform: PlatformDouyin, PlatformAccountKey: "cover-target-uid", Nickname: "封面账号", HomepageURL: "https://www.douyin.com/user/cover-target"})
	if err != nil {
		t.Fatal(err)
	}
	for _, source := range []struct{ kind, id, uid string }{{SourceOwned, owned.ID, owned.PlatformAccountKey}, {SourceCompetitor, competitor.ID, competitor.PlatformAccountKey}} {
		work, _, err := store.UpsertWork(ctx, WorkInput{SourceType: source.kind, SourceID: source.id, Platform: PlatformDouyin, WorkKey: "7312345678901234567-" + source.kind, Title: "封面作品", CoverURL: "https://p3.douyinpic.com/cover"}, time.Now().UTC())
		if err != nil {
			t.Fatal(err)
		}
		missing, err := store.ListWorksMissingCover(ctx, source.kind, source.id)
		if err != nil || len(missing) != 1 {
			t.Fatalf("missing: %v %v", missing, err)
		}
		if _, err := store.GetWorkCover(ctx, work.ID); !errors.Is(err, ErrNotFound) {
			t.Fatalf("missing cover: %v", err)
		}
		if err := store.SaveWorkCover(ctx, work.ID, "image/png", []byte("first-cover")); err != nil {
			t.Fatal(err)
		}
		path, err := store.GetWorkCover(ctx, work.ID)
		if err != nil {
			t.Fatal(err)
		}
		want := filepath.Join(store.coverDirectory, source.uid, work.WorkKey+".png")
		if path != want {
			t.Fatalf("cover path=%q want=%q", path, want)
		}
		data, err := os.ReadFile(path)
		if err != nil || string(data) != "first-cover" {
			t.Fatalf("file: %q %v", data, err)
		}
		missing, err = store.ListWorksMissingCover(ctx, source.kind, source.id)
		if err != nil || len(missing) != 0 {
			t.Fatalf("cached work still missing: %v %v", missing, err)
		}
		if err := store.SaveWorkCover(ctx, work.ID, "image/webp", []byte("replacement")); err != nil {
			t.Fatal(err)
		}
		if _, err := os.Stat(want); !errors.Is(err, os.ErrNotExist) {
			t.Fatalf("old extension still exists: %v", err)
		}
		path, err = store.GetWorkCover(ctx, work.ID)
		if err != nil || filepath.Ext(path) != ".webp" {
			t.Fatalf("replacement path: %q %v", path, err)
		}
		data, err = os.ReadFile(path)
		if err != nil || string(data) != "replacement" {
			t.Fatalf("replacement: %q %v", data, err)
		}
	}
	var obsoleteTableExists bool
	if err := store.db.QueryRowContext(ctx, `SELECT to_regclass('creator_work_cover') IS NOT NULL`).Scan(&obsoleteTableExists); err != nil || obsoleteTableExists {
		t.Fatalf("image-byte table remains: %v %v", obsoleteTableExists, err)
	}
}

func TestWorkCoverFilesExposeFailuresAndRejectInvalidNames(t *testing.T) {
	store, accounts, ctx := openCreatorIntegrationStore(t)
	accountID := createIntegrationAccount(t, ctx, accounts, "cover-errors")
	work, _, err := store.UpsertWork(ctx, WorkInput{SourceType: SourceOwned, SourceID: accountID, Platform: PlatformDouyin, WorkKey: "file-errors", CoverURL: "https://p3.douyinpic.com/cover"}, time.Now().UTC())
	if err != nil {
		t.Fatal(err)
	}
	for _, item := range []struct {
		contentType string
		data        []byte
	}{{"text/html", []byte("wrong")}, {"image/png", nil}, {"image/png", make([]byte, maxWorkCoverBytes+1)}} {
		if err := store.SaveWorkCover(ctx, work.ID, item.contentType, item.data); !errors.Is(err, ErrInvalid) {
			t.Fatalf("invalid image accepted: %v", err)
		}
	}
	if _, err := store.GetWorkCover(ctx, "missing-work"); !errors.Is(err, ErrNotFound) {
		t.Fatalf("unknown work: %v", err)
	}
	blocked := filepath.Join(t.TempDir(), "not-a-directory")
	if err := os.WriteFile(blocked, []byte("blocked"), 0600); err != nil {
		t.Fatal(err)
	}
	store.coverDirectory = blocked
	if err := store.SaveWorkCover(ctx, work.ID, "image/png", []byte("cover")); err == nil {
		t.Fatal("filesystem error was swallowed")
	}
	if _, err := store.GetWorkCover(ctx, work.ID); err == nil || errors.Is(err, ErrNotFound) {
		t.Fatalf("filesystem error treated as normal cache miss: %v", err)
	}
	bad, _, err := store.UpsertWork(ctx, WorkInput{SourceType: SourceOwned, SourceID: accountID, Platform: PlatformDouyin, WorkKey: "../outside"}, time.Now().UTC())
	if err != nil {
		t.Fatal(err)
	}
	if err := store.SaveWorkCover(ctx, bad.ID, "image/png", []byte("cover")); !errors.Is(err, ErrInvalid) {
		t.Fatalf("invalid work filename accepted: %v", err)
	}
	if _, err := store.ListWorksMissingCover(ctx, "wrong-source", accountID); !errors.Is(err, ErrInvalid) {
		t.Fatalf("invalid source: %v", err)
	}
}