package views

import korlibs.image.color.*
import korlibs.image.vector.*
import korlibs.korge.ui.*
import korlibs.korge.view.*
import korlibs.math.geom.*
import model.*
import kotlin.math.*

class BattlerView (val battler: Battler.Readonly) : UIContainer(Size(200.0, 40.0)) {

    private val staminaBar = graphics {
        drawStaminaBar()
    }
    private val healthBar = graphics {
        drawHealthBar()
    }
    private val staminaText = uiText("${battler.energy.roundToInt()}/${battler.stamina.roundToInt()}/${battler.maxStamina.roundToInt()}").xy(100, 25)
    private val healthText = uiText("${battler.composure.roundToInt()}/${battler.health.roundToInt()}/${battler.maxHealth.roundToInt()}").xy(100, 5)
    private val battlerName = uiText(battler.name)
    private var composure: Double = battler.composure
    private var health: Double = battler.health
    private var energy: Double = battler.energy
    private var stamina: Double = battler.stamina

    init {
        addUpdater {
            updateBattler()
        }
    }

    private fun ShapeBuilder.drawHealthBar() {
        if (battler.health > -battler.maxHealth) {
            fillRect(0, 10, 200 * (1 + battler.health.coerceAtMost(0.0) / battler.maxHealth), 20)
            fill(RGBA(0x5f, 0x08, 0x08, 0xff))
        }
        if (battler.health > 0) {
            fillRect(0.0, 10.0, battler.health * 200.0 / battler.maxHealth, 20.0)
            fill(RGBA(0x8f, 0x10, 0x10, 0xff))
        }
        if (battler.composure > 0) {
            fillRect(0.0, 10.0, battler.composure * 200.0 / battler.maxHealth, 20.0)
            fill(RGBA(0x10, 0xcf, 0x5f, 0xff))
        }
    }

    private fun ShapeBuilder.drawStaminaBar() {
        fillRect(50, 30, 150, 10)
        fill(RGBA(0x10, 0x10, 0x10, 0xff))
        if (battler.stamina > 0) {
            fillRect(50.0, 30.0, battler.stamina * 150.0 / battler.maxStamina, 10.0)
            fill(RGBA(0x10, 0x5f, 0x7f, 0xff))
        }
        if (battler.energy > 0) {
            fillRect(50.0, 30.0, battler.energy * 150.0 / battler.maxStamina, 10.0)
            fill(RGBA(0x10, 0x9f, 0xaf, 0xff))
        }
    }

    private fun updateHealthBar() {
        healthBar.updateShape {
            drawHealthBar()
        }
        healthText.text = "${battler.composure.roundToInt()}/${battler.health.roundToInt()}/${battler.maxHealth.roundToInt()}"
    }

    private fun updateStaminaBar() {
        staminaBar.updateShape {
            drawStaminaBar()
        }
        staminaText.text = "${battler.energy.roundToInt()}/${battler.stamina.roundToInt()}/${battler.maxStamina.roundToInt()}"
    }

    private fun updateBattler() {
        battlerName.text = battler.name
        if (composure != battler.composure || health != battler.health) {
            composure = battler.composure
            health = battler.health
            updateHealthBar()
        }
        if (energy != battler.energy || stamina != battler.stamina) {
            energy = battler.energy
            stamina = battler.stamina
            updateStaminaBar()
        }
    }
}