package com.craigvg.lichun_android.utils

import org.junit.Assert.assertEquals
import org.junit.Assert.assertNotNull
import org.junit.Assert.assertNull
import org.junit.Test
import java.util.Date

class DateFormattersTest {

    @Test
    fun `relativeTime returns Just now for less than 60 seconds ago`() {
        val date = Date(System.currentTimeMillis() - 30_000) // 30 seconds ago
        assertEquals("Just now", DateFormatters.relativeTime(date))
    }

    @Test
    fun `relativeTime returns minutes ago`() {
        val date = Date(System.currentTimeMillis() - 5 * 60 * 1000) // 5 minutes ago
        assertEquals("5m ago", DateFormatters.relativeTime(date))
    }

    @Test
    fun `relativeTime returns hours ago`() {
        val date = Date(System.currentTimeMillis() - 3 * 60 * 60 * 1000) // 3 hours ago
        assertEquals("3h ago", DateFormatters.relativeTime(date))
    }

    @Test
    fun `relativeTime returns Yesterday for 1 day ago`() {
        val date = Date(System.currentTimeMillis() - 24 * 60 * 60 * 1000L) // 1 day ago
        assertEquals("Yesterday", DateFormatters.relativeTime(date))
    }

    @Test
    fun `relativeTime returns days ago`() {
        val date = Date(System.currentTimeMillis() - 3 * 24 * 60 * 60 * 1000L) // 3 days ago
        assertEquals("3d ago", DateFormatters.relativeTime(date))
    }

    @Test
    fun `relativeTime returns weeks ago`() {
        val date = Date(System.currentTimeMillis() - 14 * 24 * 60 * 60 * 1000L) // 14 days ago
        assertEquals("2w ago", DateFormatters.relativeTime(date))
    }

    @Test
    fun `parsePythonDatetime returns non-null for valid string`() {
        val result = DateFormatters.parsePythonDatetime("2024-06-15 14:30:00.000000")
        assertNotNull(result)
    }

    @Test
    fun `parsePythonDatetime returns null for invalid string`() {
        val result = DateFormatters.parsePythonDatetime("not-a-date")
        assertNull(result)
    }
}