package com.example.bmicalculator

import org.junit.Assert.*
import org.junit.Test

class CalculateBMITest {

    // Test BMI SI Metric (Kg, Cm)
    @Test
    fun testCalculateBMI_SI_Normal() {
        val result = calculateBMI(170.0, 65.0, false) // 170cm, 65kg
        assertEquals("22.5", result) // Expected BMI ≈ 22.5
    }

    @Test
    fun testCalculateBMI_SI_Zero() {
        val result = calculateBMI(0.0, 0.0, false)
        assertEquals("0.0", result)
    }

    @Test
    fun testCalculateBMI_SI_Underweight() {
        val result = calculateBMI(170.0, 50.0, false) // 170cm, 50kg
        assertEquals("17.3", result) // Expected BMI ≈ 17.3
    }

    @Test
    fun testCalculateBMI_SI_Overweight() {
        val result = calculateBMI(170.0, 80.0, false) // 170cm, 80kg
        assertEquals("27.7", result) // Expected BMI ≈ 27.7
    }

    // Test BMI USC Units (Pound, Inch)
    @Test
    fun testCalculateBMI_USC_Normal() {
        val result = calculateBMI(70.0, 154.0, true) // 70 inch, 154 lbs
        assertEquals("22.1", result) // Expected BMI ≈ 22.1
    }

    @Test
    fun testCalculateBMI_USC_Zero() {
        val result = calculateBMI(0.0, 0.0, true)
        assertEquals("0.0", result)
    }

    // Test BMI Category
    @Test
    fun testCalculateBMICategory_Underweight() {
        val result = calculateBMICategory("17.5")
        assertEquals("⚠\uFE0F Underweight", result)
    }

    @Test
    fun testCalculateBMICategory_Normal() {
        val result = calculateBMICategory("22.5")
        assertEquals("✅ Normal", result)
    }

    @Test
    fun testCalculateBMICategory_Overweight() {
        val result = calculateBMICategory("27.5")
        assertEquals("⚠\uFE0F Overweight", result)
    }

    @Test
    fun testCalculateBMICategory_Obesity() {
        val result = calculateBMICategory("32.0")
        assertEquals("‼\uFE0F Obesity", result)
    }

    @Test
    fun testCalculateBMICategory_Zero() {
        val result = calculateBMICategory("0.0")
        assertEquals("", result)
    }

    @Test
    fun testCalculateBMICategory_EmptyString() {
        val result = calculateBMICategory("")
        assertEquals("", result)
    }

    @Test
    fun testCalculateBMICategory_WithComma() {
        val result = calculateBMICategory("22,5") // Test dengan koma
        assertEquals("✅ Normal", result)
    }
}