honeyDueKMP/composeApp/src/androidUnitTest/kotlin/com/tt/honeyDue/notifications/NotificationPayloadTest.kt

package com.tt.honeyDue.notifications

import org.junit.Assert.assertEquals
import org.junit.Assert.assertNotNull
import org.junit.Assert.assertNull
import org.junit.Test

/**
 * Unit tests for [NotificationPayload.parse] covering the FCM data-map shapes
 * produced by the backend for the four iOS parity notification types:
 * task_reminder, task_overdue, residence_invite, subscription.
 */
class NotificationPayloadTest {

    @Test
    fun parse_taskReminder_payload() {
        val data = mapOf(
            "type" to "task_reminder",
            "task_id" to "123",
            "title" to "Mow the lawn",
            "body" to "Don't forget to mow today",
            "deep_link" to "honeydue://task/123"
        )

        val payload = NotificationPayload.parse(data)

        assertNotNull(payload)
        assertEquals("task_reminder", payload!!.type)
        assertEquals(123L, payload.taskId)
        assertNull(payload.residenceId)
        assertEquals("Mow the lawn", payload.title)
        assertEquals("Don't forget to mow today", payload.body)
        assertEquals("honeydue://task/123", payload.deepLink)
    }

    @Test
    fun parse_taskOverdue_payload() {
        val data = mapOf(
            "type" to "task_overdue",
            "task_id" to "456",
            "title" to "Overdue: Clean gutters",
            "body" to "This task is past due"
        )

        val payload = NotificationPayload.parse(data)

        assertNotNull(payload)
        assertEquals("task_overdue", payload!!.type)
        assertEquals(456L, payload.taskId)
        assertEquals("Overdue: Clean gutters", payload.title)
        assertNull(payload.deepLink)
    }

    @Test
    fun parse_residenceInvite_payload() {
        val data = mapOf(
            "type" to "residence_invite",
            "residence_id" to "42",
            "title" to "You've been invited",
            "body" to "Join the home",
            "deep_link" to "honeydue://residence/42"
        )

        val payload = NotificationPayload.parse(data)

        assertNotNull(payload)
        assertEquals("residence_invite", payload!!.type)
        assertNull(payload.taskId)
        assertEquals(42L, payload.residenceId)
        assertEquals("honeydue://residence/42", payload.deepLink)
    }

    @Test
    fun parse_subscription_payload() {
        val data = mapOf(
            "type" to "subscription",
            "title" to "Subscription updated",
            "body" to "Your plan changed"
        )

        val payload = NotificationPayload.parse(data)

        assertNotNull(payload)
        assertEquals("subscription", payload!!.type)
        assertNull(payload.taskId)
        assertNull(payload.residenceId)
        assertEquals("Subscription updated", payload.title)
    }

    @Test
    fun parse_malformed_returns_null_whenTypeMissing() {
        val data = mapOf(
            "task_id" to "1",
            "title" to "x",
            "body" to "y"
        )

        assertNull(NotificationPayload.parse(data))
    }

    @Test
    fun parse_malformed_returns_null_whenTitleAndBodyMissing() {
        val data = mapOf("type" to "task_reminder")

        assertNull(NotificationPayload.parse(data))
    }

    @Test
    fun parse_emptyMap_returns_null() {
        assertNull(NotificationPayload.parse(emptyMap()))
    }

    @Test
    fun parse_ignoresInvalidNumericIds() {
        val data = mapOf(
            "type" to "task_reminder",
            "task_id" to "not-a-number",
            "title" to "x",
            "body" to "y"
        )

        val payload = NotificationPayload.parse(data)

        assertNotNull(payload)
        assertNull(payload!!.taskId)
    }
}