/**
 * maps.js - PNG-based world maps (auto-generated by Level Editor)
 */

function buildWallSet(wallData) {
    const set = new Set();
    for (const [row, cols] of Object.entries(wallData)) {
        for (const col of cols) set.add(col + ',' + row);
    }
    return set;
}

function r(a, b) { const arr = []; for (let i = a; i <= b; i++) arr.push(i); return arr; }

// ==================== Circuit Lab ====================

const labWalls = {
    0: [...r(0,9)],
    1: [0,1,2,3,6,7,8,9],
    3: [6,7,8],
    6: [0,1,2,3,6,7,8,9],
    7: [0,1,2,3,6,7,8,9],
};

const labMap = {
    id: 'lab',
    name: 'Circuit Lab',
    image: 'map:lab',
    widthTiles: 10,
    heightTiles: 12,
    spawn: { x: 4, y: 10 },
    wallSet: buildWallSet(labWalls),

    exits: [
        // No targetX/targetY — uses stored return point (the door the player entered from)
        { x: 4, y: 11, targetMap: 'town' },
        { x: 5, y: 11, targetMap: 'town' },
    ],

    npcs: [
        { id: 'professor', x: 5, y: 1, facing: 'down', dialog: ["Welcome to the Circuit Lab!","I\"m the Professor. We study logic gates here.","Use the workshop tables to design circuits.","Press TAB to open the Workshop anytime!"] },
    ],

    interactions: [
        { x: 7, y: 3, type: 'workshop', label: 'Workshop Table' },
        { x: 8, y: 3, type: 'workshop', label: 'Workshop Table' },
        { x: 6, y: 3, type: 'workshop', label: 'Workshop Table' },
        { x: 1, y: 7, type: 'sign', label: 'Bookshelf', dialog: ["A collection of logic circuit manuals."] },
        { x: 7, y: 7, type: 'sign', label: 'Bookshelf', dialog: ["Advanced boolean algebra textbooks."] },
        { x: 0, y: 1, type: 'terminal', label: 'Terminal', dialog: ["Circuit analysis terminal.","Connect components to solve puzzles."] },
    ]
};

// ==================== Neon Town ====================

const palletTownWalls = {
    0: [...r(0,19)],
    1: [0,1,2,3,4,5,6,7,8,9,10,11,18,19],
    2: [0,19],
    3: [0,4,5,6,7,12,13,14,15,19],
    4: [0,4,5,6,7,12,13,14,15,19],
    5: [0,3,4,5,6,7,11,12,13,14,15,19],
    6: [0,19],
    7: [0,19],
    8: [0,10,11,12,13,14,15,19],
    9: [0,4,5,6,7,10,11,12,13,14,15,19],
    10: [0,10,11,12,13,14,15,19],
    11: [0,10,11,13,14,15,19],
    12: [0,19],
    13: [0,10,11,12,13,14,15,19],
    14: [0,19],
    15: [0,19],
    16: [0,19],
    17: [0,1,8,9,10,11,12,13,14,15,16,17,18,19],
};

const palletTownMap = {
    id: 'town',
    name: 'Neon Town',
    image: 'map:pallet-town',
    widthTiles: 20,
    heightTiles: 18,
    spawn: { x: 12, y: 12 },
    wallSet: buildWallSet(palletTownWalls),

    exits: [
        { x: 12, y: 11, targetMap: 'lab', targetX: 4, targetY: 10 },
    ],

    npcs: [
        { id: 'merchant', x: 8, y: 10, facing: 'right', dialog: ["Welcome to Neon Town!","I trade in rare logic components."] },
        { id: 'guide', x: 11, y: 12, facing: 'down', dialog: ["The Circuit Lab is in the big building up north.","Press TAB anytime to open your Workshop."] },
    ],

    interactions: [
        { x: 3, y: 5, type: 'door', label: 'House', dialog: ["The door is locked."] },
        { x: 7, y: 9, type: 'sign', label: 'Sign', dialog: ["Welcome to Neon Town!","Circuit Lab ↑"] },
        { x: 11, y: 5, type: 'sign', label: 'Sign', dialog: ["CIRCUIT LAB","Open for research!"] },
    ]
};

// ==================== House Interior ====================

const houseA1fWalls = {
};

const houseA1fMap = {
    id: 'house-a-1f',
    name: 'House Interior',
    image: 'map:house-a-1f',
    widthTiles: 8,
    heightTiles: 8,
    spawn: { x: 0, y: 0 },
    wallSet: buildWallSet(houseA1fWalls),

    exits: [
    ],

    npcs: [
    ],

    interactions: [
    ]
};

// ==================== Route 1 ====================

const route1Walls = {
};

const route1Map = {
    id: 'route-1',
    name: 'Route 1',
    image: 'map:route-1',
    widthTiles: 20,
    heightTiles: 36,
    spawn: { x: 0, y: 0 },
    wallSet: buildWallSet(route1Walls),

    exits: [
    ],

    npcs: [
    ],

    interactions: [
    ]
};

// ==================== Registry ====================

const maps = {
    'lab': labMap,
    'town': palletTownMap,
    'house-a-1f': houseA1fMap,
    'route-1': route1Map,
};

export function getMap(id) { return maps[id] || null; }

export function isWall(mapId, x, y) {
    const map = maps[mapId];
    if (!map) return true;
    if (x < 0 || x >= map.widthTiles || y < 0 || y >= map.heightTiles) return true;
    return map.wallSet.has(x + ',' + y);
}

export function isWalkable(mapId, x, y) {
    if (isWall(mapId, x, y)) return false;
    if (getNPC(mapId, x, y)) return false;
    return true;
}

export function getInteraction(mapId, x, y) {
    const map = maps[mapId];
    if (!map) return null;
    return map.interactions.find(i => i.x === x && i.y === y) || null;
}

export function getNPC(mapId, x, y) {
    const map = maps[mapId];
    if (!map) return null;
    return map.npcs.find(npc => npc.x === x && npc.y === y) || null;
}

export function getExit(mapId, x, y) {
    const map = maps[mapId];
    if (!map) return null;
    return map.exits.find(e => e.x === x && e.y === y) || null;
}

export function getTile(mapId, x, y) { return isWall(mapId, x, y) ? 1 : 0; }

export { maps };