module TK.SpaceTac {
    export const AIProducerTools = <const>{
        /**
         * Add a random move action
         */
        addMove(planning: TurnPlanning, ship: Ship, action: MoveAction, random: RandomGenerator): void {
            const distance = random.random() * (action.max_distance - action.min_distance) + action.min_distance;
            const angle = random.random() * Math.PI * 2;
            planning.addAction(ship, action, distance, angle);
        },

        /**
         * Add a random active or passive action
         */
        addAction(planning: TurnPlanning, ship: Ship, action: BaseAction, random: RandomGenerator): void {
            const range = action.getRangeRadius(ship);
            if (range) {
                const distance = 1 - random.random() * range;
                const angle = random.random() * Math.PI * 2;
                planning.addAction(ship, action, distance, angle);
            } else {
                planning.addAction(ship, action);
            }
        },

        /**
         * Get a single random plan
         */
        getRandomPlan(battle: Battle, player: Player, random: RandomGenerator): AIPlan {
            const planning = new TurnPlanning(battle, player);

            for (let ship of battle.ships.iterator()) {
                if (ship.isPlayedBy(player)) {
                    // Passive actions
                    for (let action of ship.actions.listAll().filter(action => action.getCategory() == ActionCategory.PASSIVE)) {
                        if (random.bool()) {
                            this.addAction(planning, ship, action, random);
                        }
                    }

                    // Move
                    for (let action of ship.actions.listAll()) {
                        if (action instanceof MoveAction) {
                            if (random.bool()) {
                                this.addMove(planning, ship, action, random);
                                break;
                            }
                        }
                    }

                    // Active action
                    for (let action of ship.actions.listAll().filter(action => action.getCategory() == ActionCategory.ACTIVE)) {
                        if (random.bool()) {
                            this.addAction(planning, ship, action, random);
                            break;
                        }
                    }
                }
            }

            return new AIPlan(planning.getTurnPlan(), battle, player);
        }
    }

    export const AIPlanProducers: { [name: string]: (...args: any[]) => AIPlanProducer } = {
        random: (battle: Battle, player: Player, gen = RandomGenerator.global) => {
            const builder = () => AIProducerTools.getRandomPlan(battle, player, gen);
            function* producer() {
                while (true) {
                    yield builder();
                }
            }
            return producer();
        }
    }
}