import {CATEGORIES} from './locations.js';

// The bonus for visiting every kind of place counts city locations, not the factory.
const CITY_CATEGORIES = Object.keys(CATEGORIES).filter(c => c !== 'factory');

export const POINTS = {purchase: 100, discovery: 250, combo: 150, allCategories: 500};

export const RANKS = [
    {name: 'تازه‌وارد', xp: 0},
    {name: 'کاوشگر', xp: 600},
    {name: 'راه‌بلد', xp: 1400},
    {name: 'شکارچی دستگاه', xp: 2600},
    {name: 'استاد نقشه', xp: 4200},
    {name: 'افسانهٔ مشهد', xp: 6500}
];

// Awards for `record`, given the purchases that happened before it.
export function awardsFor(previous, record) {
    const awards = [{label: 'خرید موفق', points: POINTS.purchase}];
    const here = previous.filter(p => p.machineId === record.machineId);
    if (!here.length) awards.push({label: 'کشف مکان جدید', points: POINTS.discovery});
    // Paid once per machine: the first time it has sold both a drink and a snack.
    const typesHere = new Set(here.map(p => p.type));
    if (typesHere.size === 1 && !typesHere.has(record.type)) awards.push({label: 'ترکیب نوشیدنی و خوراکی', points: POINTS.combo});
    const categories = new Set(previous.map(p => p.category).filter(c => CITY_CATEGORIES.includes(c)));
    if (CITY_CATEGORIES.includes(record.category) && !categories.has(record.category) && categories.size === CITY_CATEGORIES.length - 1)
        awards.push({label: 'همهٔ انواع مکان', points: POINTS.allCategories});
    return awards;
}

export function rankFor(xp) {
    let index = 0;
    while (index + 1 < RANKS.length && xp >= RANKS[index + 1].xp) index++;
    const next = RANKS[index + 1] ?? null;
    return {index, name: RANKS[index].name, min: RANKS[index].xp, next: next?.xp ?? null, progress: next ? (xp - RANKS[index].xp) / (next.xp - RANKS[index].xp) : 1};
}

const placesVisited = purchases => new Set(purchases.map(p => p.machineId)).size;

export const MISSIONS = [
    {
        id: 'factory', title: 'در سالن تولید از دستگاه نمونهٔ کارخانه خرید کن', target: 'factory', xp: 100, hetoman: 20,
        done: ps => ps.some(p => p.machineId === 'factory')
    },
    {
        id: 'first', title: 'با ماشین تا بوستان ملت برو و اولین خرید شهری را انجام بده', target: 'mellat-park', xp: 150, hetoman: 30,
        done: ps => ps.some(p => p.machineId === 'mellat-park')
    },
    {
        id: 'school', title: 'قبل از تعطیلی مدرسه (۱۳:۳۰) از دستگاه مدرسه خرید کن', target: 'school-rahil', xp: 200, hetoman: 40,
        done: ps => ps.some(p => p.machineId === 'school-rahil')
    },
    {
        id: 'campus', title: 'به دانشگاه فردوسی برو و یک خوراکی بخر', target: 'ferdowsi-university', xp: 200, hetoman: 40,
        done: ps => ps.some(p => p.machineId === 'ferdowsi-university' && p.type === 'snack')
    },
    {
        id: 'metro', title: 'از دستگاه ایستگاه مترو آزادی خرید کن', target: 'azadi-metro', xp: 150, hetoman: 30,
        done: ps => ps.some(p => p.machineId === 'azadi-metro')
    },
    {
        id: 'mall', title: 'با ماشین تا مشهد مال برو و خرید کن', target: 'mashhad-mall', xp: 250, hetoman: 50,
        done: ps => ps.some(p => p.machineId === 'mashhad-mall')
    },
    {
        id: 'explorer', title: 'از ۵ مکان متفاوت شهر خرید کن', target: null, xp: 400, hetoman: 80,
        done: ps => placesVisited(ps.filter(p => p.category !== 'factory')) >= 5
    }
];

// Marks and returns missions that the current purchases complete for the first time.
export function completeMissions(state) {
    const fresh = MISSIONS.filter(m => !state.missionsDone.includes(m.id) && m.done(state.purchases));
    for (const m of fresh) {
        state.missionsDone.push(m.id);
        state.xp += m.xp;
        state.balance += m.hetoman;
    }
    return fresh;
}

export const activeMission = state => MISSIONS.find(m => !state.missionsDone.includes(m.id)) ?? null;