import { VillageTaskCollection } from './VillageTaskCollection';
import { Task, TaskId } from './Queue/TaskProvider';
import { Args } from './Queue/Args';
import { VillageState } from './VillageState';
import { Resources } from './Core/Resources';
import { MerchantsInfo } from './Core/Market';
import { VillageStorage } from './Storage/VillageStorage';
import { ReceiveResourcesMode } from './Core/Village';

export class VillageController {
    private readonly villageId: number;
    private readonly storage: VillageStorage;
    private readonly taskCollection: VillageTaskCollection;
    private readonly state: VillageState;

    constructor(
        villageId: number,
        storage: VillageStorage,
        taskCollection: VillageTaskCollection,
        state: VillageState
    ) {
        this.villageId = villageId;
        this.storage = storage;
        this.taskCollection = taskCollection;
        this.state = state;
    }

    getVillageId() {
        return this.villageId;
    }

    getState(): VillageState {
        return this.state;
    }

    getReadyProductionTask(): Task | undefined {
        return this.state.firstReadyTask;
    }

    addTask(name: string, args: Args) {
        this.taskCollection.addTask(name, args);
    }

    removeTask(taskId: TaskId) {
        this.taskCollection.removeTask(taskId);
    }

    postponeTask(taskId: TaskId, seconds: number) {
        this.taskCollection.postponeTask(taskId, seconds);
    }

    getMerchantsInfo(): MerchantsInfo {
        return this.storage.getMerchantsInfo();
    }

    getSendResourcesMultiplier(): number {
        return this.state.settings.sendResourcesMultiplier;
    }

    getOverflowResources(): Resources {
        const limit = this.state.storageOptimumFullness;
        const currentResources = this.state.resources;

        return currentResources.sub(limit).max(Resources.zero());
    }

    getFreeResources(): Resources {
        const mode = this.state.settings.receiveResourcesMode;
        const requirementResources = this.state.required.resources;
        const optimumToStoreResources = this.state.storageOptimumFullness;

        switch (mode) {
            case ReceiveResourcesMode.Required:
                return this.calcFreeResources(requirementResources);
            case ReceiveResourcesMode.Optimum:
                return this.calcFreeResources(optimumToStoreResources);
        }
    }

    private calcFreeResources(targetResources: Resources): Resources {
        const currentResources = this.state.resources;
        const free = currentResources.sub(targetResources).max(Resources.zero());

        const amount = free.amount();
        const threshold = this.state.settings.sendResourcesThreshold;

        if (amount < threshold) {
            return Resources.zero();
        }

        return free;
    }

    getRequiredResources(): Resources {
        const mode = this.state.settings.receiveResourcesMode;
        const optimumToStoreResources = this.state.storageOptimumFullness;
        const requirementResources = this.state.required.resources;

        switch (mode) {
            case ReceiveResourcesMode.Required:
                return this.calcRequiredResources(requirementResources);
            case ReceiveResourcesMode.Optimum:
                return this.calcRequiredResources(optimumToStoreResources);
        }
    }

    private calcRequiredResources(targetResources: Resources): Resources {
        const optimumToStoreResources = this.state.storageOptimumFullness;
        const currentResources = this.state.resources;
        const incomingResources = this.state.incomingResources;

        return targetResources
            .min(optimumToStoreResources)
            .sub(currentResources)
            .sub(incomingResources)
            .max(Resources.zero());
    }

    getAvailableToReceiveResources(): Resources {
        const optimumToStoreResources = this.state.storageOptimumFullness;
        const currentResources = this.state.resources;

        return optimumToStoreResources.sub(currentResources).max(Resources.zero());
    }

    toggleReceiveResourcesMode(): void {
        const current = this.state.settings.receiveResourcesMode;

        let next;
        switch (current) {
            case ReceiveResourcesMode.Required:
                next = ReceiveResourcesMode.Optimum;
                break;
            case ReceiveResourcesMode.Optimum:
                next = ReceiveResourcesMode.Required;
                break;
        }

        const newSettings = { ...this.state.settings, receiveResourcesMode: next };
        this.storage.storeSettings(newSettings);
    }
}