package server

import (
	"encoding/json"
	"testing"

	"git.wntrmute.dev/mc/mcr/internal/db"
)

// seedRepoForAdmin inserts a repository with a manifest and tags into the test DB.
func seedRepoForAdmin(t *testing.T, database *db.DB, name string, tags []string) {
	t.Helper()
	_, err := database.Exec(`INSERT INTO repositories (name) VALUES (?)`, name)
	if err != nil {
		t.Fatalf("insert repo %q: %v", name, err)
	}
	var repoID int64
	if err := database.QueryRow(`SELECT id FROM repositories WHERE name = ?`, name).Scan(&repoID); err != nil {
		t.Fatalf("select repo id: %v", err)
	}
	_, err = database.Exec(
		`INSERT INTO manifests (repository_id, digest, media_type, content, size)
		 VALUES (?, ?, 'application/vnd.oci.image.manifest.v1+json', '{}', 512)`,
		repoID, "sha256:manifest-"+name,
	)
	if err != nil {
		t.Fatalf("insert manifest: %v", err)
	}
	var manifestID int64
	if err := database.QueryRow(`SELECT id FROM manifests WHERE repository_id = ?`, repoID).Scan(&manifestID); err != nil {
		t.Fatalf("select manifest id: %v", err)
	}
	for _, tag := range tags {
		_, err := database.Exec(`INSERT INTO tags (repository_id, name, manifest_id) VALUES (?, ?, ?)`,
			repoID, tag, manifestID)
		if err != nil {
			t.Fatalf("insert tag %q: %v", tag, err)
		}
	}
}

func TestAdminListRepos(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	seedRepoForAdmin(t, database, "alpha/app", []string{"latest", "v1.0"})
	seedRepoForAdmin(t, database, "bravo/lib", []string{"latest"})

	rr := adminReq(t, router, "GET", "/v1/repositories", "")
	if rr.Code != 200 {
		t.Fatalf("status: got %d, want 200", rr.Code)
	}

	var repos []db.RepoMetadata
	if err := json.NewDecoder(rr.Body).Decode(&repos); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(repos) != 2 {
		t.Fatalf("repo count: got %d, want 2", len(repos))
	}
	if repos[0].Name != "alpha/app" {
		t.Fatalf("first repo: got %q, want %q", repos[0].Name, "alpha/app")
	}
	if repos[0].TagCount != 2 {
		t.Fatalf("tag count: got %d, want 2", repos[0].TagCount)
	}
	if repos[0].ManifestCount != 1 {
		t.Fatalf("manifest count: got %d, want 1", repos[0].ManifestCount)
	}
}

func TestAdminListReposEmpty(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	rr := adminReq(t, router, "GET", "/v1/repositories", "")
	if rr.Code != 200 {
		t.Fatalf("status: got %d, want 200", rr.Code)
	}

	var repos []db.RepoMetadata
	if err := json.NewDecoder(rr.Body).Decode(&repos); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(repos) != 0 {
		t.Fatalf("repo count: got %d, want 0", len(repos))
	}
}

func TestAdminListReposPagination(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	seedRepoForAdmin(t, database, "alpha/app", []string{"latest"})
	seedRepoForAdmin(t, database, "bravo/lib", []string{"latest"})
	seedRepoForAdmin(t, database, "charlie/svc", []string{"latest"})

	rr := adminReq(t, router, "GET", "/v1/repositories?n=2&offset=0", "")
	if rr.Code != 200 {
		t.Fatalf("status: got %d, want 200", rr.Code)
	}

	var repos []db.RepoMetadata
	if err := json.NewDecoder(rr.Body).Decode(&repos); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(repos) != 2 {
		t.Fatalf("page 1 count: got %d, want 2", len(repos))
	}
}

func TestAdminGetRepoDetail(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	seedRepoForAdmin(t, database, "myorg/myapp", []string{"latest", "v1.0"})

	rr := adminReq(t, router, "GET", "/v1/repositories/myorg/myapp", "")
	if rr.Code != 200 {
		t.Fatalf("status: got %d, want 200; body: %s", rr.Code, rr.Body.String())
	}

	var detail db.RepoDetail
	if err := json.NewDecoder(rr.Body).Decode(&detail); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if detail.Name != "myorg/myapp" {
		t.Fatalf("name: got %q, want %q", detail.Name, "myorg/myapp")
	}
	if len(detail.Tags) != 2 {
		t.Fatalf("tag count: got %d, want 2", len(detail.Tags))
	}
	if len(detail.Manifests) != 1 {
		t.Fatalf("manifest count: got %d, want 1", len(detail.Manifests))
	}
}

func TestAdminGetRepoDetailNotFound(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	rr := adminReq(t, router, "GET", "/v1/repositories/nonexistent/repo", "")
	if rr.Code != 404 {
		t.Fatalf("status: got %d, want 404", rr.Code)
	}
}

func TestAdminDeleteRepo(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	seedRepoForAdmin(t, database, "myorg/myapp", []string{"latest"})

	rr := adminReq(t, router, "DELETE", "/v1/repositories/myorg/myapp", "")
	if rr.Code != 204 {
		t.Fatalf("status: got %d, want 204; body: %s", rr.Code, rr.Body.String())
	}

	// Verify it's gone.
	rr = adminReq(t, router, "GET", "/v1/repositories/myorg/myapp", "")
	if rr.Code != 404 {
		t.Fatalf("after delete status: got %d, want 404", rr.Code)
	}
}

func TestAdminDeleteRepoNotFound(t *testing.T) {
	database := openAdminTestDB(t)
	router, _ := buildAdminRouter(t, database)

	rr := adminReq(t, router, "DELETE", "/v1/repositories/nonexistent/repo", "")
	if rr.Code != 404 {
		t.Fatalf("status: got %d, want 404", rr.Code)
	}
}

func TestAdminDeleteRepoNonAdmin(t *testing.T) {
	database := openAdminTestDB(t)
	router := buildNonAdminRouter(t, database)

	seedRepoForAdmin(t, database, "myorg/myapp", []string{"latest"})

	rr := adminReq(t, router, "DELETE", "/v1/repositories/myorg/myapp", "")
	if rr.Code != 403 {
		t.Fatalf("status: got %d, want 403", rr.Code)
	}
}