flamenet-messenger-android/engine/src/test/kotlin/io/flamenet/e2e/ScreenshotNoticeTest.kt

package io.flamenet.e2e

import org.json.JSONObject
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFalse
import kotlin.test.assertNull
import kotlin.test.assertTrue

/**
 * Telling somebody their disappearing message was screenshotted (§6.27, ios#36).
 *
 * 🔴 **A courtesy from the taker's own client, and nothing else.** A modified
 * build, a second phone photographing the screen, or the platform's own
 * recorder all produce nothing. A notice means one was probably taken; no
 * notice means NOTHING — and most of these tests are about not letting the
 * interface say otherwise.
 */
class ScreenshotNoticeTest {

    @Test
    fun `the notice carries when it happened`() {
        val content = Content.parse(Content.screenshot(1_788_000_000))
        assertEquals(1_788_000_000, Content.screenshotAt(content))
    }

    /** ⚠️ Control traffic, so an older build stays quiet instead of showing JSON. */
    @Test
    fun `the notice is marked as control traffic`() {
        val json = JSONObject(Content.screenshot(1))
        assertEquals(1, json.getInt("ctl"))
        assertEquals(Content.Kind.SCREENSHOT, json.getString("kind"))
        assertTrue(Content.Kind.SCREENSHOT in Content.Kind.CONTROL)
    }

    @Test
    fun `the marker stays first`() {
        assertTrue(Content.screenshot(1).startsWith("{\"fnc\":1"))
    }

    /** A notice is never a message. */
    @Test
    fun `the notice carries no text`() {
        assertTrue(Content.parse(Content.screenshot(1)).text.isEmpty())
    }

    /** Reading the stamp off anything else must yield nothing. */
    @Test
    fun `an ordinary message has no screenshot stamp`() {
        assertNull(Content.screenshotAt(Content.parse(Content.text("hi", messageId = "m"))))
    }

    // -- When one is sent -----------------------------------------------------

    /** 🔴 Only where a timer is set. */
    @Test
    fun `no notice in a conversation with no timer`() {
        assertFalse(Content.shouldAnnounceScreenshot(0, null, 1_000))
    }

    @Test
    fun `a notice is sent in a timed conversation`() {
        assertTrue(Content.shouldAnnounceScreenshot(3600, null, 1_000))
    }

    /** ⚠️ One screenshot often fires several platform events. */
    @Test
    fun `a second event inside the window is suppressed`() {
        assertFalse(Content.shouldAnnounceScreenshot(3600, 1_000, 2_000))
    }

    @Test
    fun `a genuine second screenshot later is announced`() {
        assertTrue(Content.shouldAnnounceScreenshot(3600, 1_000, 10_000))
    }

    /** ⚠️ The timer check comes first, or a window would enable an untimed chat. */
    @Test
    fun `the window does not override the timer rule`() {
        assertFalse(Content.shouldAnnounceScreenshot(0, 1_000, 999_000))
    }

    // -- What may be claimed --------------------------------------------------

    /**
     * 🔴 **The most important test here.** Presenting the absence of notices as
     * a fact would be inventing evidence out of silence.
     */
    @Test
    fun `the disclaimer refuses to turn silence into evidence`() {
        val t = Content.screenshotDisclaimer
        assertTrue(t.contains("when their app can tell"), t)
        assertTrue(t.contains("cannot always"), t)
        assertTrue(t.contains("was not captured"), t)
    }

    /**
     * ⚠️ Android's half of the asymmetry has to be stated, not hidden. Claiming
     * a symmetry with iOS that does not exist is worse than the gap, because
     * somebody would rely on it.
     */
    @Test
    fun `the disclaimer states the android limitation`() {
        val t = Content.screenshotDisclaimer
        assertTrue(t.contains("recent version"), t)
        assertTrue(t.contains("screen recording"), t)
    }
}