package api

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

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

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

func newMeSubsonicPasswordRouter(h *handlers) chi.Router {
	r := chi.NewRouter()
	r.Get("/api/me/subsonic-password", h.handleGetMySubsonicPassword)
	r.Post("/api/me/subsonic-password", h.handleGenerateMySubsonicPassword)
	r.Delete("/api/me/subsonic-password", h.handleClearMySubsonicPassword)
	return r
}

func readSubsonicPassword(t *testing.T, h *handlers, user dbq.User) *string {
	t.Helper()
	var pw *string
	if err := h.pool.QueryRow(context.Background(),
		"SELECT subsonic_password FROM users WHERE id = $1", user.ID).Scan(&pw); err != nil {
		t.Fatalf("read subsonic_password: %v", err)
	}
	return pw
}

func TestSubsonicPassword_GenerateIsRandomAndNotTheLoginPassword(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, pool := testHandlers(t)
	user := seedUser(t, pool, "sspw1", "login-pw", false)
	router := newMeSubsonicPasswordRouter(h)

	generate := func() string {
		req := withUser(httptest.NewRequest(http.MethodPost, "/api/me/subsonic-password", nil), user)
		rec := httptest.NewRecorder()
		router.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200; body=%s", rec.Code, rec.Body.String())
		}
		var resp subsonicPasswordResp
		if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
			t.Fatalf("decode: %v", err)
		}
		return resp.Password
	}

	first := generate()
	if len(first) != 24 {
		t.Errorf("password length = %d, want 24", len(first))
	}
	if first == "login-pw" {
		t.Errorf("generated password equals the login password")
	}
	if got := readSubsonicPassword(t, h, user); got == nil || *got != first {
		t.Errorf("stored = %v, want the returned password", got)
	}

	second := generate()
	if second == first {
		t.Errorf("regenerate returned the same password")
	}
	if got := readSubsonicPassword(t, h, user); got == nil || *got != second {
		t.Errorf("stored after regenerate = %v, want the new password", got)
	}
}

func TestSubsonicPassword_StatusAndClear(t *testing.T) {
	if os.Getenv("MINSTREL_TEST_DATABASE_URL") == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	h, pool := testHandlers(t)
	user := seedUser(t, pool, "sspw2", "login-pw", false)
	router := newMeSubsonicPasswordRouter(h)

	status := func(u dbq.User) bool {
		req := withUser(httptest.NewRequest(http.MethodGet, "/api/me/subsonic-password", nil), u)
		rec := httptest.NewRecorder()
		router.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("GET status = %d, want 200; body=%s", rec.Code, rec.Body.String())
		}
		var resp subsonicPasswordStatusResp
		if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
			t.Fatalf("decode: %v", err)
		}
		return resp.Enabled
	}

	if status(user) {
		t.Errorf("enabled = true for a new account, want false")
	}
	pw := "set-by-test"
	user.SubsonicPassword = &pw
	if !status(user) {
		t.Errorf("enabled = false with a password set, want true")
	}
	// The status response never carries the value itself.
	req := withUser(httptest.NewRequest(http.MethodGet, "/api/me/subsonic-password", nil), user)
	rec := httptest.NewRecorder()
	router.ServeHTTP(rec, req)
	var raw map[string]any
	if err := json.Unmarshal(rec.Body.Bytes(), &raw); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if _, has := raw["password"]; has {
		t.Errorf("GET response includes the password: %s", rec.Body.String())
	}

	if err := dbq.New(pool).SetSubsonicPassword(context.Background(), dbq.SetSubsonicPasswordParams{
		ID: user.ID, SubsonicPassword: &pw,
	}); err != nil {
		t.Fatalf("seed subsonic_password: %v", err)
	}
	req = withUser(httptest.NewRequest(http.MethodDelete, "/api/me/subsonic-password", nil), user)
	rec = httptest.NewRecorder()
	router.ServeHTTP(rec, req)
	if rec.Code != http.StatusNoContent {
		t.Fatalf("DELETE status = %d, want 204; body=%s", rec.Code, rec.Body.String())
	}
	if got := readSubsonicPassword(t, h, user); got != nil {
		t.Errorf("stored after clear = %q, want NULL", *got)
	}
}