package main

import (
	v "bitbucket.org/hackerbots/vector"
)

type Robot struct {
	Id          string     `json:"id"`
	Name        string     `json:"name"`
	Stats       Stats      `json:"stats"`
	TargetSpeed float64    `json:"speed"`
	Speed       float64    `json:"speed"`
	Health      int        `json:"health"`
	Position    v.Point2d  `json:"position"`
	Heading     v.Vector2d `json:"heading"`
	MoveTo      *v.Point2d `json:"move_to,omitempty"`
	FireAt      *v.Point2d `json:"fire_at,omitempty"`
	Scanners    []Scanner  `json:"scanners"`
	LastFired   int        `json:"last_fired"`
}

type RobotSorter struct {
	Robots []Robot
}

func (s RobotSorter) Len() int {
	return len(s.Robots)
}

func (s RobotSorter) Swap(i, j int) {
	s.Robots[i], s.Robots[j] = s.Robots[j], s.Robots[i]
}

func (s RobotSorter) Less(i, j int) bool {
	return s.Robots[i].Id < s.Robots[j].Id
}

type Stats struct {
	Hp            int     `json:"hp"`
	Speed         float64 `json:"speed"`
	Acceleration  float64 `json:"acceleration"`
	WeaponRadius  int     `json:"weapon_radius"`
	ScannerRadius int     `json:"scanner_radius"`
	TurnSpeed     int     `json:"turn_speed"`
	FireRate      int     `json:"fire_rate"`
}

// We request stats using an integer between 1 and 100, the
// integer values map to sensible min-max ranges
type StatsRequest struct {
	Hp            int `json:"hp"`
	Speed         int `json:"speed"`
	Acceleration  int `json:"acceleration"`
	WeaponRadius  int `json:"weapon_radius"`
	ScannerRadius int `json:"scanner_radius"`
	TurnSpeed     int `json:"turn_speed"`
	FireRate      int `json:"fire_rate"`
}

func DeriveStats(request StatsRequest) Stats {
	s := Stats{}

	// Conversion Tables
	hp_min := 20.0
	hp_max := 200.0
	s.Hp = int(((float64(request.Hp) / 100.0) * (hp_max - hp_min)) + hp_min)

	speed_min := 40.0
	speed_max := 200.0
	s.Speed = ((float64(request.Speed) / 100.0) * (speed_max - speed_min)) + speed_min

	accel_min := 20.0
	accel_max := 200.0
	s.Acceleration = ((float64(request.Acceleration) / 100.0) * (accel_max - accel_min)) + accel_min

	wep_rad_min := 5.0
	wep_rad_max := 60.0
	s.WeaponRadius = int(((float64(request.WeaponRadius) / 100.0) * (wep_rad_max - wep_rad_min)) + wep_rad_min)

	scan_rad_min := 100.0
	scan_rad_max := 400.0
	s.ScannerRadius = int(((float64(request.ScannerRadius) / 100.0) * (scan_rad_max - scan_rad_min)) + scan_rad_min)

	turn_spd_min := 30.0
	turn_spd_max := 300.0
	s.TurnSpeed = int(((float64(request.TurnSpeed) / 100.0) * (turn_spd_max - turn_spd_min)) + turn_spd_min)

	fire_rate_min := 10.0
	fire_rate_max := 2000.0
	s.FireRate = int(fire_rate_max+300.0) - int(((float64(request.FireRate)/100.0)*(fire_rate_max-fire_rate_min))+fire_rate_min)

	return s
}

func (s StatsRequest) Valid() bool {
	total := (s.Speed + s.Hp + s.WeaponRadius +
		s.ScannerRadius + s.Acceleration + s.TurnSpeed + s.FireRate)

	if total > 350 {
		return false
	}
	return true
}

type Projectile struct {
	Id       string    `json:"id"`
	Position v.Point2d `json:"position"`
	MoveTo   v.Point2d `json:"move_to"`
	Radius   int       `json:"radius"`
	Speed    float64   `json:"speed"`
	Damage   int       `json:"damage"`
}

type Splosion struct {
	Id        string    `json:"id"`
	Position  v.Point2d `json:"position"`
	Radius    int       `json:"radius"`
	MaxDamage int       `json:"damage"`
	MinDamage int       `json:"damage"`
	Lifespan  int       `json:"lifespan"`
}

func (s *Splosion) Tick() {
	s.Lifespan--
}

func (s *Splosion) Alive() bool {
	return s.Lifespan > 0
}

type Instruction struct {
	MoveTo *v.Point2d `json:"move_to,omitempty"`
	FireAt *v.Point2d `json:"fire_at,omitempty"`
	Stats  Stats      `json:"stats"`
}