package api

import (
	"context"
	"encoding/json"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"os"
	"testing"

	"github.com/go-chi/chi/v5"

	"git.fabledsword.com/bvandeusen/minstrel/internal/auth"
	"git.fabledsword.com/bvandeusen/minstrel/internal/coverart"
	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
)

// newAdminCoversRouter builds a test chi router with the two cover admin
// endpoints. RequireAdmin middleware is applied; tests inject the user into
// context manually (RequireUser is bypassed).
func newAdminCoversRouter(h *handlers) chi.Router {
	r := chi.NewRouter()
	r.Route("/api/admin", func(admin chi.Router) {
		admin.Use(auth.RequireAdmin())
		admin.Post("/albums/{id}/cover/refetch", h.handleAdminAlbumRefetchCover)
		admin.Post("/covers/refetch-missing", h.handleAdminBulkRefetchCovers)
	})
	return r
}

// doAdminCoversReq fires an HTTP request against the admin covers router
// with the given user in context.
func doAdminCoversReq(t *testing.T, h *handlers, method, path string, user dbq.User) *httptest.ResponseRecorder {
	t.Helper()
	req := httptest.NewRequest(method, path, nil)
	req = withUser(req, user)
	w := httptest.NewRecorder()
	newAdminCoversRouter(h).ServeHTTP(w, req)
	return w
}

// testHandlersWithCovers returns a handlers instance with a stub coverart
// Enricher wired in. No external providers are registered, so the
// sidecar-only path is exercised and cover_art_source lands as 'none' for
// albums without real track files.
func testHandlersWithCovers(t *testing.T) (*handlers, *coverart.Enricher) {
	t.Helper()
	h, pool := testHandlers(t)
	settings, err := coverart.NewSettingsService(context.Background(), pool, slog.Default())
	if err != nil {
		t.Fatalf("NewSettingsService: %v", err)
	}
	enricher := coverart.NewEnricher(pool, slog.Default(), settings)
	h.coverart = enricher
	return h, enricher
}

func TestAdminAlbumRefetchCover_NonAdminReturns403(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, _ := testHandlersWithCovers(t)
	user := seedUser(t, h.pool, "alice", "pw", false)
	artist := seedArtist(t, h.pool, "TestArtist")
	album := seedAlbum(t, h.pool, artist.ID, "TestAlbum", 0)

	w := doAdminCoversReq(t, h, http.MethodPost,
		"/api/admin/albums/"+uuidToString(album.ID)+"/cover/refetch", user)
	if w.Code != http.StatusForbidden {
		t.Errorf("status = %d, want 403; body=%s", w.Code, w.Body.String())
	}
}

func TestAdminAlbumRefetchCover_AdminOK(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, _ := testHandlersWithCovers(t)
	admin := seedUser(t, h.pool, "rootuser", "pw", true)
	artist := seedArtist(t, h.pool, "TestArtist")
	album := seedAlbum(t, h.pool, artist.ID, "TestAlbum", 0)

	w := doAdminCoversReq(t, h, http.MethodPost,
		"/api/admin/albums/"+uuidToString(album.ID)+"/cover/refetch", admin)
	if w.Code != http.StatusOK {
		t.Errorf("status = %d, want 200; body=%s", w.Code, w.Body.String())
	}
	var resp adminCoverRefetchResp
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	// Album has no MBID and no sidecar, so source should be 'none'.
	if resp.CoverArtSource == nil || *resp.CoverArtSource != "none" {
		t.Errorf("source = %v, want 'none'", resp.CoverArtSource)
	}
}

func TestAdminBulkRefetchCovers_AdminStartsRefetch(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, _ := testHandlersWithCovers(t)
	admin := seedUser(t, h.pool, "rootuser2", "pw", true)
	artist := seedArtist(t, h.pool, "TestArtist")
	_ = seedAlbum(t, h.pool, artist.ID, "Album1", 0)
	_ = seedAlbum(t, h.pool, artist.ID, "Album2", 0)

	w := doAdminCoversReq(t, h, http.MethodPost, "/api/admin/covers/refetch-missing", admin)
	if w.Code != http.StatusOK {
		t.Errorf("status = %d, want 200; body=%s", w.Code, w.Body.String())
	}
	var resp adminBulkRefetchResp
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if !resp.Started {
		t.Errorf("started = false, want true (bulk refetch should acknowledge)")
	}
}

func TestAdminBulkRefetchCovers_NonAdminReturns403(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, _ := testHandlersWithCovers(t)
	user := seedUser(t, h.pool, "alicebulk", "pw", false)

	w := doAdminCoversReq(t, h, http.MethodPost, "/api/admin/covers/refetch-missing", user)
	if w.Code != http.StatusForbidden {
		t.Errorf("status = %d, want 403; body=%s", w.Code, w.Body.String())
	}
}