// api.js — Frontend ↔ Backend API Bridge

const API_BASE = 'http://localhost:8000/api';

class GameAPI {
    constructor() {
        this.cache = new Map();
        this.cacheTimeout = 30000; // 30s cache for dialogues
    }

    async getPlayer() {
        try {
            const res = await fetch(`${API_BASE}/player`);
            return await res.json();
        } catch (e) {
            console.warn('[API] getPlayer failed:', e);
            return null;
        }
    }

    async savePlayer(state) {
        try {
            await fetch(`${API_BASE}/player/save`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(state)
            });
        } catch (e) {
            console.warn('[API] savePlayer failed:', e);
        }
    }

    async getEvents(mapId) {
        try {
            const res = await fetch(`${API_BASE}/events/${mapId}`);
            const data = await res.json();
            return data.events || [];
        } catch (e) {
            console.warn('[API] getEvents failed:', e);
            return [];
        }
    }

    async generateEvent(mapId, playerLevel) {
        try {
            const res = await fetch(`${API_BASE}/llm/event?map_id=${mapId}&player_level=${playerLevel}`, {
                method: 'POST'
            });
            const data = await res.json();
            return data.event;
        } catch (e) {
            console.warn('[API] generateEvent failed:', e);
            return null;
        }
    }

    async getNPCDialogue(npcId, playerClass, playerLevel, mood) {
        const cacheKey = `${npcId}_${mood}`;
        if (this.cache.has(cacheKey)) {
            const cached = this.cache.get(cacheKey);
            if (Date.now() - cached.time < this.cacheTimeout) {
                return cached.dialogue;
            }
        }

        try {
            const res = await fetch(`${API_BASE}/llm/dialogue?npc_id=${npcId}&player_class=${playerClass}&player_level=${playerLevel}&mood=${mood}`, {
                method: 'POST'
            });
            const data = await res.json();
            if (data.dialogue) {
                this.cache.set(cacheKey, { dialogue: data.dialogue, time: Date.now() });
                return data.dialogue;
            }
        } catch (e) {
            console.warn('[API] getNPCDialogue failed:', e);
        }
        return null;
    }

    async health() {
        try {
            const res = await fetch(`${API_BASE}/health`);
            return await res.json();
        } catch (e) {
            return { status: 'offline' };
        }
    }
}