package main

import (
	"math"

	rl "github.com/gen2brain/raylib-go/raylib"
)

func UpdateCamera(camera *rl.Camera3D, player rl.Vector3, deltaTime float32) {
	// Update camera based on mouse wheel
	wheelMove := rl.GetMouseWheelMove()
	if wheelMove != 0 {
		cameraDistance += -wheelMove * 5
		if cameraDistance < 10 {
			cameraDistance = 10
		}
		if cameraDistance > 250 {
			cameraDistance = 250
		}
	}

	// Orbit camera around the player using arrow keys
	if rl.IsKeyDown(rl.KeyRight) {
		cameraYaw += 100 * deltaTime
	}
	if rl.IsKeyDown(rl.KeyLeft) {
		cameraYaw -= 100 * deltaTime
	}
	if rl.IsKeyDown(rl.KeyUp) {
		cameraPitch -= 50 * deltaTime
		if cameraPitch < 20 {
			cameraPitch = 20
		}
	}
	if rl.IsKeyDown(rl.KeyDown) {
		cameraPitch += 50 * deltaTime
		if cameraPitch > 85 {
			cameraPitch = 85
		}
	}

	// Calculate the new camera position using spherical coordinates
	cameraYawRad := float64(cameraYaw) * rl.Deg2rad
	cameraPitchRad := float64(cameraPitch) * rl.Deg2rad
	cameraPos := rl.Vector3{
		X: player.X + cameraDistance*float32(math.Cos(cameraYawRad))*float32(math.Cos(cameraPitchRad)),
		Y: player.Y + cameraDistance*float32(math.Sin(cameraPitchRad)),
		Z: player.Z + cameraDistance*float32(math.Sin(cameraYawRad))*float32(math.Cos(cameraPitchRad)),
	}

	// Update the camera's position and target
	camera.Position = cameraPos
	camera.Target = rl.NewVector3(player.X, player.Y, player.Z)
}