// ============================================================================
// ARCANE DUELS — Complete Card Database
// An original TCG with 5 colors: Radiance, Tide, Shadow, Flame, Growth
// ============================================================================

const COLORS = {
  RADIANCE: 'radiance',   // White — order, healing, protection
  TIDE: 'tide',           // Blue — knowledge, control, illusion
  SHADOW: 'shadow',       // Black — death, sacrifice, power
  FLAME: 'flame',         // Red — chaos, destruction, speed
  GROWTH: 'growth',       // Green — nature, strength, growth
  COLORLESS: 'colorless',
};

const TYPES = {
  CREATURE: 'creature',
  SORCERY: 'sorcery',
  INSTANT: 'instant',
  ENCHANTMENT: 'enchantment',
  ARTIFACT: 'artifact',
  LAND: 'land',
};

// Keywords mapping
const KEYWORDS = {
  SWIFT: 'swift',             // Can attack immediately (Haste)
  VIGILANT: 'vigilant',       // Doesn't tap to attack (Vigilance)
  SOARING: 'soaring',         // Can only be blocked by Soaring/Reaching (Flying)
  GUARDIAN: 'guardian',        // Deals damage first in combat (First Strike)
  FORTIFIED: 'fortified',     // Can't attack (Defender)
  DRAINING: 'draining',       // Gain life equal to damage dealt (Lifelink)
  OVERWHELMING: 'overwhelming', // Excess combat damage hits player (Trample)
  VENOMOUS: 'venomous',       // Any damage is lethal (Deathtouch)
  REACHING: 'reaching',       // Can block Soaring creatures (Reach)
};

// Mana cost encoding: { radiance: N, tide: N, shadow: N, flame: N, growth: N, colorless: N }
// e.g. 2W = { colorless: 2, radiance: 1 }

let nextId = 1;
function card(props) {
  return { id: nextId++, ...props };
}

// ============================================================================
// RADIANCE (White) — 12 cards
// ============================================================================
const radianceCards = [
  card({
    name: 'Sanctuary Guard',
    type: TYPES.CREATURE,
    cost: { colorless: 1, radiance: 1 },
    color: COLORS.RADIANCE,
    power: 2, toughness: 2,
    keywords: [],
    abilities: [],
    flavor: 'The temple never falls while its guardians stand.',
    rarity: 'common',
  }),
  card({
    name: 'Dawn Priest',
    type: TYPES.CREATURE,
    cost: { colorless: 2, radiance: 1 },
    color: COLORS.RADIANCE,
    power: 1, toughness: 4,
    keywords: [KEYWORDS.FORTIFIED],
    abilities: [{ trigger: 'upkeep', effect: 'gainLife', amount: 1 }],
    flavor: 'Each sunrise is a prayer answered.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Shieldbearer',
    type: TYPES.CREATURE,
    cost: { radiance: 1 },
    color: COLORS.RADIANCE,
    power: 1, toughness: 1,
    keywords: [KEYWORDS.VIGILANT],
    abilities: [],
    flavor: 'Always watching, never resting.',
    rarity: 'common',
  }),
  card({
    name: 'Radiant Champion',
    type: TYPES.CREATURE,
    cost: { colorless: 3, radiance: 2 },
    color: COLORS.RADIANCE,
    power: 4, toughness: 4,
    keywords: [KEYWORDS.VIGILANT],
    abilities: [],
    flavor: 'She carries the light of a thousand dawns into battle.',
    rarity: 'rare',
  }),
  card({
    name: 'Lightbringer',
    type: TYPES.CREATURE,
    cost: { colorless: 2, radiance: 1 },
    color: COLORS.RADIANCE,
    power: 2, toughness: 2,
    keywords: [],
    abilities: [{ trigger: 'enters', effect: 'gainLife', amount: 3 }],
    flavor: 'Where she walks, wounds close and despair lifts.',
    rarity: 'common',
  }),
  card({
    name: 'Angelic Sentinel',
    type: TYPES.CREATURE,
    cost: { colorless: 3, radiance: 2 },
    color: COLORS.RADIANCE,
    power: 3, toughness: 5,
    keywords: [KEYWORDS.SOARING, KEYWORDS.VIGILANT],
    abilities: [],
    flavor: 'Its wings span the horizon, shielding the faithful below.',
    rarity: 'rare',
  }),
  card({
    name: 'Holy Wrath',
    type: TYPES.SORCERY,
    cost: { colorless: 2, radiance: 2 },
    color: COLORS.RADIANCE,
    abilities: [{ effect: 'destroyCreatureIf', condition: 'powerGte4' }],
    flavor: 'The righteous need not fear judgment.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Mending Light',
    type: TYPES.INSTANT,
    cost: { radiance: 1 },
    color: COLORS.RADIANCE,
    abilities: [{ effect: 'gainLife', amount: 4 }],
    flavor: 'A warm glow that knits flesh and spirit alike.',
    rarity: 'common',
  }),
  card({
    name: 'Celestial Shield',
    type: TYPES.INSTANT,
    cost: { colorless: 1, radiance: 1 },
    color: COLORS.RADIANCE,
    abilities: [{ effect: 'pumpCreature', power: 0, toughness: 4, duration: 'endOfTurn' }],
    flavor: 'The blow struck true—but found only light.',
    rarity: 'common',
  }),
  card({
    name: 'Divine Decree',
    type: TYPES.ENCHANTMENT,
    cost: { colorless: 2, radiance: 2 },
    color: COLORS.RADIANCE,
    abilities: [{ effect: 'anthemBuff', power: 1, toughness: 1 }],
    flavor: 'By decree of the High Luminary, all shall stand firm.',
    rarity: 'rare',
  }),
  card({
    name: 'Purifying Light',
    type: TYPES.SORCERY,
    cost: { colorless: 3, radiance: 2 },
    color: COLORS.RADIANCE,
    abilities: [{ effect: 'destroyAllCreatures' }],
    flavor: 'When the light burns too bright, nothing remains.',
    rarity: 'rare',
  }),
  card({
    name: 'Resolute Defender',
    type: TYPES.CREATURE,
    cost: { colorless: 1, radiance: 1 },
    color: COLORS.RADIANCE,
    power: 1, toughness: 3,
    keywords: [KEYWORDS.GUARDIAN],
    abilities: [],
    flavor: 'His shield has turned a thousand blades.',
    rarity: 'common',
  }),
];

// ============================================================================
// TIDE (Blue) — 12 cards
// ============================================================================
const tideCards = [
  card({
    name: 'Reef Scholar',
    type: TYPES.CREATURE,
    cost: { colorless: 1, tide: 1 },
    color: COLORS.TIDE,
    power: 1, toughness: 2,
    keywords: [],
    abilities: [{ trigger: 'enters', effect: 'drawCards', amount: 1 }],
    flavor: 'The coral libraries hold secrets older than the continents.',
    rarity: 'common',
  }),
  card({
    name: 'Tidal Serpent',
    type: TYPES.CREATURE,
    cost: { colorless: 4, tide: 2 },
    color: COLORS.TIDE,
    power: 5, toughness: 5,
    keywords: [KEYWORDS.SOARING],
    abilities: [],
    flavor: 'It moves between sea and sky as if the boundary were a suggestion.',
    rarity: 'rare',
  }),
  card({
    name: 'Mistwalker',
    type: TYPES.CREATURE,
    cost: { colorless: 2, tide: 1 },
    color: COLORS.TIDE,
    power: 2, toughness: 1,
    keywords: [KEYWORDS.SOARING],
    abilities: [],
    flavor: 'It drifts through the fog, never quite where you expect.',
    rarity: 'common',
  }),
  card({
    name: 'Arcane Student',
    type: TYPES.CREATURE,
    cost: { tide: 1 },
    color: COLORS.TIDE,
    power: 1, toughness: 1,
    keywords: [],
    abilities: [{ trigger: 'tap', effect: 'scry', amount: 1 }],
    flavor: 'Every page reveals a new horizon.',
    rarity: 'common',
  }),
  card({
    name: 'Current Channeler',
    type: TYPES.CREATURE,
    cost: { colorless: 2, tide: 2 },
    color: COLORS.TIDE,
    power: 2, toughness: 4,
    keywords: [],
    abilities: [{ trigger: 'spellCast', effect: 'drawCards', amount: 1 }],
    flavor: 'Magic flows through her like water through a delta.',
    rarity: 'rare',
  }),
  card({
    name: 'Mind Shatter',
    type: TYPES.INSTANT,
    cost: { tide: 2 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'counterSpell' }],
    flavor: 'Your incantation unravels before the last syllable.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Essence Drain',
    type: TYPES.INSTANT,
    cost: { colorless: 1, tide: 1 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'bounceCreature' }],
    flavor: 'Returned to the aether, as if it had never been summoned.',
    rarity: 'common',
  }),
  card({
    name: 'Foresight',
    type: TYPES.SORCERY,
    cost: { tide: 1 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'drawCards', amount: 2 }],
    flavor: 'To see what comes is the first step to mastering it.',
    rarity: 'common',
  }),
  card({
    name: 'Mental Fortress',
    type: TYPES.ENCHANTMENT,
    cost: { colorless: 2, tide: 1 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'extraDraw', amount: 1 }],
    flavor: 'Within these walls, knowledge multiplies endlessly.',
    rarity: 'rare',
  }),
  card({
    name: 'Time Warp',
    type: TYPES.SORCERY,
    cost: { colorless: 3, tide: 2 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'extraTurn' }],
    flavor: 'Yesterday and tomorrow are merely pages to be turned.',
    rarity: 'mythic',
  }),
  card({
    name: 'Frost Barrier',
    type: TYPES.INSTANT,
    cost: { colorless: 1, tide: 1 },
    color: COLORS.TIDE,
    abilities: [{ effect: 'tapCreature' }],
    flavor: 'Frozen mid-stride, locked in a prison of ice.',
    rarity: 'common',
  }),
  card({
    name: 'Thought Thief',
    type: TYPES.CREATURE,
    cost: { colorless: 1, tide: 1 },
    color: COLORS.TIDE,
    power: 2, toughness: 1,
    keywords: [],
    abilities: [{ trigger: 'dealsDamage', effect: 'drawCards', amount: 1 }],
    flavor: 'What you know, he knows. What he knows, you never will.',
    rarity: 'uncommon',
  }),
];

// ============================================================================
// SHADOW (Black) — 12 cards
// ============================================================================
const shadowCards = [
  card({
    name: 'Graveborn Ghoul',
    type: TYPES.CREATURE,
    cost: { colorless: 1, shadow: 1 },
    color: COLORS.SHADOW,
    power: 2, toughness: 2,
    keywords: [],
    abilities: [],
    flavor: 'It remembers nothing of its former life, only hunger.',
    rarity: 'common',
  }),
  card({
    name: 'Soul Collector',
    type: TYPES.CREATURE,
    cost: { colorless: 3, shadow: 2 },
    color: COLORS.SHADOW,
    power: 3, toughness: 4,
    keywords: [KEYWORDS.DRAINING],
    abilities: [],
    flavor: 'Each soul taken makes it stronger, and its victims weaker.',
    rarity: 'rare',
  }),
  card({
    name: 'Plague Rat',
    type: TYPES.CREATURE,
    cost: { colorless: 1, shadow: 1 },
    color: COLORS.SHADOW,
    power: 1, toughness: 1,
    keywords: [],
    abilities: [{ effect: 'plagueRatBonus' }],
    flavor: 'Where one scurries, a hundred follow.',
    rarity: 'common',
  }),
  card({
    name: 'Night Terror',
    type: TYPES.CREATURE,
    cost: { colorless: 2, shadow: 1 },
    color: COLORS.SHADOW,
    power: 2, toughness: 1,
    keywords: [KEYWORDS.SOARING],
    abilities: [],
    flavor: 'It feeds on screams the way others feed on bread.',
    rarity: 'common',
  }),
  card({
    name: 'Bone Revenant',
    type: TYPES.CREATURE,
    cost: { colorless: 4, shadow: 2 },
    color: COLORS.SHADOW,
    power: 6, toughness: 5,
    keywords: [KEYWORDS.VENOMOUS],
    abilities: [],
    flavor: 'Assembled from the bones of fallen champions.',
    rarity: 'rare',
  }),
  card({
    name: 'Vampiric Noble',
    type: TYPES.CREATURE,
    cost: { colorless: 2, shadow: 1 },
    color: COLORS.SHADOW,
    power: 3, toughness: 2,
    keywords: [KEYWORDS.DRAINING],
    abilities: [],
    flavor: 'She attends the finest galas. Few guests leave alive.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Raise Dead',
    type: TYPES.SORCERY,
    cost: { shadow: 1 },
    color: COLORS.SHADOW,
    abilities: [{ effect: 'returnFromGraveyard', type: 'creature' }],
    flavor: 'Death is merely a temporary inconvenience.',
    rarity: 'common',
  }),
  card({
    name: 'Dark Pact',
    type: TYPES.SORCERY,
    cost: { shadow: 2 },
    color: COLORS.SHADOW,
    abilities: [{ effect: 'drawCards', amount: 2 }, { effect: 'loseLife', amount: 2 }],
    flavor: 'Power has a price. The wise pay it willingly.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Assassinate',
    type: TYPES.INSTANT,
    cost: { colorless: 1, shadow: 2 },
    color: COLORS.SHADOW,
    abilities: [{ effect: 'destroyCreature' }],
    flavor: 'No spell, no blade—just silence, then nothing.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Drain Life',
    type: TYPES.SORCERY,
    cost: { shadow: 2 },
    color: COLORS.SHADOW,
    abilities: [{ effect: 'drainLife', isX: true }],
    flavor: 'Your loss is my gain, in the most literal sense.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Cursed Ground',
    type: TYPES.ENCHANTMENT,
    cost: { colorless: 1, shadow: 1 },
    color: COLORS.SHADOW,
    abilities: [{ trigger: 'creatureDies', effect: 'opponentLosesLife', amount: 1 }],
    flavor: 'Nothing rests peacefully here.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Mind Rot',
    type: TYPES.SORCERY,
    cost: { colorless: 1, shadow: 1 },
    color: COLORS.SHADOW,
    abilities: [{ effect: 'opponentDiscards', amount: 2 }],
    flavor: 'Thoughts dissolve like morning mist in the darkness.',
    rarity: 'common',
  }),
];

// ============================================================================
// FLAME (Red) — 12 cards
// ============================================================================
const flameCards = [
  card({
    name: 'Goblin Striker',
    type: TYPES.CREATURE,
    cost: { flame: 1 },
    color: COLORS.FLAME,
    power: 1, toughness: 1,
    keywords: [KEYWORDS.SWIFT],
    abilities: [],
    flavor: 'Speed is a virtue. Thinking is not.',
    rarity: 'common',
  }),
  card({
    name: 'Fire Elemental',
    type: TYPES.CREATURE,
    cost: { colorless: 3, flame: 2 },
    color: COLORS.FLAME,
    power: 5, toughness: 4,
    keywords: [],
    abilities: [],
    flavor: 'Born of the mountain\'s heart, it answers to no master.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Lightning Imp',
    type: TYPES.CREATURE,
    cost: { colorless: 1, flame: 1 },
    color: COLORS.FLAME,
    power: 2, toughness: 1,
    keywords: [KEYWORDS.SWIFT],
    abilities: [],
    flavor: 'It arrives with the thunder and leaves with the echo.',
    rarity: 'common',
  }),
  card({
    name: 'Lava Golem',
    type: TYPES.CREATURE,
    cost: { colorless: 2, flame: 1 },
    color: COLORS.FLAME,
    power: 3, toughness: 2,
    keywords: [],
    abilities: [],
    flavor: 'Molten stone given purpose, if not grace.',
    rarity: 'common',
  }),
  card({
    name: 'Dragon of the Peaks',
    type: TYPES.CREATURE,
    cost: { colorless: 4, flame: 2 },
    color: COLORS.FLAME,
    power: 5, toughness: 5,
    keywords: [KEYWORDS.SOARING, KEYWORDS.SWIFT],
    abilities: [],
    flavor: 'The mountain trembles when it wakes. The world trembles when it flies.',
    rarity: 'mythic',
  }),
  card({
    name: 'Berserker Ogre',
    type: TYPES.CREATURE,
    cost: { colorless: 2, flame: 2 },
    color: COLORS.FLAME,
    power: 4, toughness: 3,
    keywords: [KEYWORDS.OVERWHELMING],
    abilities: [],
    flavor: 'Subtlety is a foreign concept. Destruction is its mother tongue.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Lightning Bolt',
    type: TYPES.INSTANT,
    cost: { flame: 1 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'dealDamage', amount: 3, target: 'any' }],
    flavor: 'The sky cracks open and chooses its victim.',
    rarity: 'common',
  }),
  card({
    name: 'Fireball',
    type: TYPES.SORCERY,
    cost: { flame: 1 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'dealDamage', target: 'any', isX: true }],
    flavor: 'The equation is simple: more mana, more fire.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Inferno',
    type: TYPES.SORCERY,
    cost: { colorless: 3, flame: 2 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'dealDamageAll', amount: 3 }],
    flavor: 'Everything burns eventually. This just speeds up the schedule.',
    rarity: 'rare',
  }),
  card({
    name: 'Battle Rage',
    type: TYPES.INSTANT,
    cost: { flame: 1 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'pumpCreature', power: 3, toughness: 0, duration: 'endOfTurn' }],
    flavor: 'Thought yields to instinct, instinct to fury.',
    rarity: 'common',
  }),
  card({
    name: 'Flame Barrage',
    type: TYPES.INSTANT,
    cost: { colorless: 1, flame: 1 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'dealDamage', amount: 2, target: 'any' }],
    flavor: 'One bolt for spite. Two for certainty.',
    rarity: 'common',
  }),
  card({
    name: 'Reckless Charge',
    type: TYPES.SORCERY,
    cost: { flame: 1 },
    color: COLORS.FLAME,
    abilities: [{ effect: 'giveKeyword', keyword: KEYWORDS.SWIFT }, { effect: 'pumpCreature', power: 2, toughness: 0, duration: 'endOfTurn' }],
    flavor: 'Strategy is for cowards. Real warriors just run faster.',
    rarity: 'common',
  }),
];

// ============================================================================
// GROWTH (Green) — 12 cards
// ============================================================================
const growthCards = [
  card({
    name: 'Woodland Elf',
    type: TYPES.CREATURE,
    cost: { growth: 1 },
    color: COLORS.GROWTH,
    power: 1, toughness: 1,
    keywords: [],
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'any' }],
    flavor: 'The forest speaks through her, and she answers with magic.',
    rarity: 'common',
  }),
  card({
    name: 'Highland Bear',
    type: TYPES.CREATURE,
    cost: { colorless: 1, growth: 1 },
    color: COLORS.GROWTH,
    power: 2, toughness: 2,
    keywords: [],
    abilities: [],
    flavor: 'It needs no magic. Teeth and claws suffice.',
    rarity: 'common',
  }),
  card({
    name: 'Ironbark Treant',
    type: TYPES.CREATURE,
    cost: { colorless: 3, growth: 2 },
    color: COLORS.GROWTH,
    power: 5, toughness: 7,
    keywords: [],
    abilities: [],
    flavor: 'Centuries of growth have made it as unyielding as stone.',
    rarity: 'rare',
  }),
  card({
    name: 'Wild Stallion',
    type: TYPES.CREATURE,
    cost: { colorless: 2, growth: 1 },
    color: COLORS.GROWTH,
    power: 3, toughness: 3,
    keywords: [],
    abilities: [],
    flavor: 'Untamed and untameable, it runs where it wills.',
    rarity: 'common',
  }),
  card({
    name: 'Ancient Wurm',
    type: TYPES.CREATURE,
    cost: { colorless: 4, growth: 2 },
    color: COLORS.GROWTH,
    power: 7, toughness: 7,
    keywords: [KEYWORDS.OVERWHELMING],
    abilities: [],
    flavor: 'Older than the forests it burrows beneath.',
    rarity: 'mythic',
  }),
  card({
    name: 'Thornweaver',
    type: TYPES.CREATURE,
    cost: { colorless: 2, growth: 1 },
    color: COLORS.GROWTH,
    power: 2, toughness: 3,
    keywords: [KEYWORDS.REACHING],
    abilities: [],
    flavor: 'Its thorny tendrils snatch birds from the sky.',
    rarity: 'common',
  }),
  card({
    name: 'Giant Growth',
    type: TYPES.INSTANT,
    cost: { growth: 1 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'pumpCreature', power: 3, toughness: 3, duration: 'endOfTurn' }],
    flavor: 'Nature\'s fury compressed into a single heartbeat.',
    rarity: 'common',
  }),
  card({
    name: "Nature's Gift",
    type: TYPES.SORCERY,
    cost: { colorless: 1, growth: 1 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'searchLand' }],
    flavor: 'The land provides for those who listen.',
    rarity: 'common',
  }),
  card({
    name: 'Regenerate',
    type: TYPES.INSTANT,
    cost: { growth: 1 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'preventDamage', target: 'creature' }],
    flavor: 'What was broken, the forest mends.',
    rarity: 'common',
  }),
  card({
    name: 'Overrun',
    type: TYPES.SORCERY,
    cost: { colorless: 3, growth: 2 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'pumpAll', power: 3, toughness: 3, keyword: KEYWORDS.OVERWHELMING }],
    flavor: 'The forest does not march. It stampedes.',
    rarity: 'rare',
  }),
  card({
    name: 'Vine Snare',
    type: TYPES.INSTANT,
    cost: { colorless: 1, growth: 1 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'preventCombatDamage' }],
    flavor: 'Thorned vines erupt from the earth, halting all charge.',
    rarity: 'common',
  }),
  card({
    name: 'Feral Instinct',
    type: TYPES.INSTANT,
    cost: { growth: 1 },
    color: COLORS.GROWTH,
    abilities: [{ effect: 'pumpCreature', power: 1, toughness: 1, duration: 'endOfTurn' }, { effect: 'drawCards', amount: 1 }],
    flavor: 'Trust the animal within.',
    rarity: 'uncommon',
  }),
];

// ============================================================================
// COLORLESS — Artifacts (7 cards)
// ============================================================================
const artifactCards = [
  card({
    name: 'Crystal Amulet',
    type: TYPES.ARTIFACT,
    cost: { colorless: 2 },
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'any' }],
    flavor: 'It pulses with the light of every color, and none.',
    rarity: 'uncommon',
  }),
  card({
    name: 'War Golem',
    type: TYPES.CREATURE,
    subtype: 'artifact',
    cost: { colorless: 5 },
    color: COLORS.COLORLESS,
    power: 4, toughness: 4,
    keywords: [],
    abilities: [],
    flavor: 'Forged in the War of Five Suns, it still remembers how to fight.',
    rarity: 'common',
  }),
  card({
    name: 'Enchanted Blade',
    type: TYPES.ARTIFACT,
    subtype: 'equipment',
    cost: { colorless: 3 },
    color: COLORS.COLORLESS,
    abilities: [{ effect: 'equipBuff', power: 2, toughness: 1 }],
    flavor: 'Its edge never dulls, and its hunger never fades.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Healing Draught',
    type: TYPES.ARTIFACT,
    cost: { colorless: 1 },
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap_sacrifice', effect: 'gainLife', amount: 3 }],
    flavor: 'One sip restores what hours of rest cannot.',
    rarity: 'common',
  }),
  card({
    name: 'Mind Stone',
    type: TYPES.ARTIFACT,
    cost: { colorless: 2 },
    color: COLORS.COLORLESS,
    abilities: [
      { trigger: 'tap', effect: 'addMana', color: 'colorless' },
      { trigger: 'tap_sacrifice', effect: 'drawCards', amount: 1 },
    ],
    flavor: 'It stores thoughts the way a gem stores light.',
    rarity: 'uncommon',
  }),
  card({
    name: 'Iron Shield',
    type: TYPES.ARTIFACT,
    subtype: 'equipment',
    cost: { colorless: 2 },
    color: COLORS.COLORLESS,
    abilities: [{ effect: 'equipBuff', power: 0, toughness: 3 }],
    flavor: 'Heavy, inelegant, and thoroughly reliable.',
    rarity: 'common',
  }),
  card({
    name: 'Arcane Compass',
    type: TYPES.ARTIFACT,
    cost: { colorless: 1 },
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'scry', amount: 1 }],
    flavor: 'It always points toward what you need most.',
    rarity: 'common',
  }),
];

// ============================================================================
// LANDS — 5 Basic + 5 Dual
// ============================================================================
const landCards = [
  // Basic Lands
  card({
    name: 'Sunlit Plains',
    type: TYPES.LAND,
    subtype: 'basic',
    color: COLORS.RADIANCE,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'radiance' }],
    rarity: 'basic',
  }),
  card({
    name: 'Coral Reef',
    type: TYPES.LAND,
    subtype: 'basic',
    color: COLORS.TIDE,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'tide' }],
    rarity: 'basic',
  }),
  card({
    name: 'Dark Swamp',
    type: TYPES.LAND,
    subtype: 'basic',
    color: COLORS.SHADOW,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'shadow' }],
    rarity: 'basic',
  }),
  card({
    name: 'Volcanic Peak',
    type: TYPES.LAND,
    subtype: 'basic',
    color: COLORS.FLAME,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'flame' }],
    rarity: 'basic',
  }),
  card({
    name: 'Verdant Forest',
    type: TYPES.LAND,
    subtype: 'basic',
    color: COLORS.GROWTH,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'growth' }],
    rarity: 'basic',
  }),
  // Dual Lands
  card({
    name: 'Dual Springs',
    type: TYPES.LAND,
    subtype: 'dual',
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'radiance|tide' }],
    rarity: 'rare',
  }),
  card({
    name: 'Ashen Moor',
    type: TYPES.LAND,
    subtype: 'dual',
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'shadow|flame' }],
    rarity: 'rare',
  }),
  card({
    name: 'Twilight Glade',
    type: TYPES.LAND,
    subtype: 'dual',
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'radiance|growth' }],
    rarity: 'rare',
  }),
  card({
    name: 'Molten Cavern',
    type: TYPES.LAND,
    subtype: 'dual',
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'flame|growth' }],
    rarity: 'rare',
  }),
  card({
    name: 'Frozen Depths',
    type: TYPES.LAND,
    subtype: 'dual',
    color: COLORS.COLORLESS,
    abilities: [{ trigger: 'tap', effect: 'addMana', color: 'tide|shadow' }],
    rarity: 'rare',
  }),
];

// ============================================================================
// ALL CARDS
// ============================================================================
const ALL_CARDS = [
  ...radianceCards,
  ...tideCards,
  ...shadowCards,
  ...flameCards,
  ...growthCards,
  ...artifactCards,
  ...landCards,
];

// Card lookup by ID
const CARD_DB = {};
ALL_CARDS.forEach((c) => { CARD_DB[c.id] = c; });

// Get the converted mana cost (total mana needed)
function getManaCost(cost) {
  if (!cost) return 0;
  return Object.values(cost).reduce((sum, v) => sum + v, 0);
}

// Build a starter deck for a given color (24 lands + 36 spells)
function buildStarterDeck(color) {
  const colorCards = ALL_CARDS.filter(
    (c) => c.color === color && c.type !== TYPES.LAND
  );
  const basicLand = ALL_CARDS.find(
    (c) => c.type === TYPES.LAND && c.subtype === 'basic' && c.color === color
  );

  const deck = [];

  // Add 4 copies of each color card (up to 9 unique cards = 36)
  const spellCards = colorCards.slice(0, 9);
  spellCards.forEach((c) => {
    for (let i = 0; i < 4; i++) deck.push(c.id);
  });

  // Fill to 60 with basic lands
  while (deck.length < 60) {
    deck.push(basicLand.id);
  }

  return deck;
}

// Prebuilt starter decks
const STARTER_DECKS = {
  radiance: { name: 'Dawn\'s Wrath', color: COLORS.RADIANCE },
  tide: { name: 'Depths of Knowledge', color: COLORS.TIDE },
  shadow: { name: 'Veil of Shadows', color: COLORS.SHADOW },
  flame: { name: 'Infernal Fury', color: COLORS.FLAME },
  growth: { name: 'Primal Might', color: COLORS.GROWTH },
};

module.exports = {
  COLORS,
  TYPES,
  KEYWORDS,
  ALL_CARDS,
  CARD_DB,
  getManaCost,
  buildStarterDeck,
  STARTER_DECKS,
};