// Data-driven content for civilisations, units, buildings, governments and
// technologies. The server and the browser both read these plain objects, so
// the catalogue text, costs and effects can never disagree between the two.

export const EFFECT_GDP = "gdp";
export const EFFECT_RESEARCH = "research";
export const EFFECT_CULTURE = "culture";
export const EFFECT_BUDGET_INCOME = "budget_income";

// Diplomatic relations between two civilisations. Only peace and war exist for
// now, but the catalogue is data-driven so further statuses (alliances,
// truces, ...) can be slotted in without touching the simulation.
export const RELATION_PEACE = "peace";
export const RELATION_WAR = "war";
export const RELATIONS = [RELATION_PEACE, RELATION_WAR];

// Kinds of news item shown in the feed. Newsworthy events are recorded in
// GameState with their in-game hour so every client can render them.
export const NEWS_WAR = "war";
export const NEWS_CAPTURE = "capture";

function effect(stat, baseValue, exponent = 1.0) {
  return { stat, baseValue, exponent };
}

export function effectValue(e, level) {
  if (level <= 0) return 0;
  return e.baseValue * Math.pow(level, e.exponent);
}

export const CIVILISATIONS = [
  {
    id: "france",
    name: "France",
    demonym: "French",
    primaryColour: "#0d0d5c",
    accentColour: "#8c8c82",
    flag: "flag_france.png",
    cityNames: ["Lyon", "Marseille", "Toulouse", "Nice", "Nantes", "Montpellier", "Strasbourg", "Bordeaux", "Lille"],
  },
  {
    id: "britain",
    name: "Britain",
    demonym: "British",
    primaryColour: "#a81818",
    accentColour: "#0722ff",
    flag: "flag_britain.png",
    cityNames: ["Birmingham", "Manchester", "Glasgow", "Liverpool", "Leeds", "Sheffield", "Edinburgh", "Bristol", "Cardiff"],
  },
  {
    id: "slovenia",
    name: "Slovenia",
    demonym: "Slovenian",
    primaryColour: "#005da4",
    accentColour: "#ed1c24",
    flag: "flag_slovenia.png",
    cityNames: ["Ljubljana", "Maribor", "Celje", "Kranj", "Koper", "Velenje", "Novo Mesto", "Ptuj", "Kamnik", "Jesenice"],
  },
  {
    id: "poland",
    name: "Poland",
    demonym: "Polish",
    primaryColour: "#a6000b",
    accentColour: "#ffffff",
    flag: "flag_poland.png",
    cityNames: ["Warsaw", "Kraków", "Łódź", "Wrocław", "Poznań", "Gdańsk", "Szczecin", "Bydgoszcz", "Lublin", "Katowice"],
  },
  {
    id: "switzerland",
    name: "Switzerland",
    demonym: "Swiss",
    primaryColour: "#da291c",
    accentColour: "#ffffff",
    flag: "flag_switzerland.png",
    cityNames: ["Bern", "Zürich", "Geneva", "Basel", "Lausanne", "Lucerne", "Winterthur", "St. Gallen", "Lugano", "Biel"],
  },
  {
    id: "ticino",
    name: "Ticino",
    demonym: "Ticinese",
    primaryColour: "#4646e0",
    accentColour: "#a6000b",
    flag: "flag_ticino.png",
    cityNames: ["Bellinzona", "Lugano", "Locarno", "Mendrisio", "Chiasso", "Airolo", "Biasca", "Ascona", "Faido", "Giubiasco"],
  },
  {
    id: "galicia",
    name: "Galicia",
    demonym: "Galician",
    primaryColour: "#006dad",
    accentColour: "#ffffff",
    flag: "flag_galicia.png",
    cityNames: ["Santiago de Compostela", "Vigo", "A Coruña", "Ourense", "Lugo", "Pontevedra", "Ferrol", "Vilagarcía de Arousa", "Ribeira", "Redondela"],
  },
  {
    id: "germany",
    name: "Germany",
    demonym: "German",
    primaryColour: "#141414",
    accentColour: "#ffce00",
    flag: "flag_germany.png",
    cityNames: ["Berlin", "Hamburg", "Munich", "Cologne", "Frankfurt", "Stuttgart", "Düsseldorf", "Leipzig", "Dortmund", "Essen"],
  },
  {
    id: "iran",
    name: "Iran",
    demonym: "Iranian",
    primaryColour: "#18a645",
    accentColour: "#f01c21",
    flag: "flag_iran.png",
    cityNames: ["Tehran", "Mashhad", "Isfahan", "Karaj", "Shiraz", "Tabriz", "Qom", "Ahvaz", "Kermanshah", "Urmia"],
  },
];

export const PROTO_UNITS = [
  {
    id: "modern_infantry",
    name: "Modern infantry",
    maxHp: 500,
    cost: 100_000_000,
    upkeep: 5000,
    moveable: true,
    speed: 0.5,
    // Only military units fight, capture cities and may enter an enemy
    // military unit's tile. `attack` is the damage dealt per combat round and
    // `defense` is the damage absorbed per round; a defender's defense is
    // doubled (the 100% defensive bonus). `range` is how many tiles away the
    // unit can strike (1 is melee).
    military: true,
    attack: 100,
    defense: 40,
    range: 1,
    traversableTerrains: ["Land"],
    icon: "icon_modern_infantry.svg",
  },
  {
    id: "worker",
    name: "Worker",
    maxHp: 100,
    cost: 0,
    upkeep: 0,
    moveable: true,
    speed: 0.5,
    military: false,
    attack: 0,
    defense: 0,
    range: 1,
    traversableTerrains: ["Land"],
    icon: "icon_settler.svg",
  },
  {
    id: "artillery",
    name: "Artillery",
    maxHp: 400,
    cost: 300_000_000,
    upkeep: 12_000,
    moveable: true,
    speed: 0.25,
    military: true,
    attack: 250,
    // Barely armoured: nearly every hit gets through.
    defense: 5,
    // Outranges infantry, so melee units cannot strike back from two tiles.
    range: 2,
    traversableTerrains: ["Land"],
    icon: "icon_artillery.svg",
  },
];

// Only units in this list can be trained from the city screen, matching
// GameState.TRAINABLE_UNITS.
export const TRAINABLE_UNIT_IDS = ["modern_infantry", "artillery"];

// Status effects a unit or city can carry. They are data-driven so new ones
// can be added without touching the simulation or the renderer: the server
// derives the active ids, applies their fields, and ships the ids in
// snapshots; the browser draws one icon per id. A status may define
// `hpLossPerDay` (a fraction of maximum hit points taken each day), a
// `cityHpLossPerDay` override for when the unit stands in a city, and an
// `upkeepMultiplier` applied to the unit's upkeep while it is active.
export const STATUS_ENCIRCLED = "encircled";
export const STATUS_BESIEGED = "besieged";
export const STATUS_BATTLE = "battle";

export const STATUSES = [
  {
    id: STATUS_ENCIRCLED,
    label: "Encircled",
    icon: "encirclement.svg",
    description: "Cut off from every allied city while a hostile unit is adjacent. Loses 10% of its maximum hit points each day, or 2% inside a city.",
    hpLossPerDay: 0.10,
    cityHpLossPerDay: 0.02,
  },
  {
    id: STATUS_BESIEGED,
    label: "Besieged",
    icon: "encirclement.svg",
    description: "Cut off from every other allied city while a hostile unit is adjacent.",
  },
  {
    id: STATUS_BATTLE,
    label: "In battle",
    icon: "icon_battle.svg",
    description: "Fighting an enemy unit in range. Upkeep is tripled while the battle rages.",
    upkeepMultiplier: 3,
  },
];

export function statusById(id) {
  return STATUSES.find((status) => status.id === id) || null;
}

export const BUILDINGS = [
  {
    id: "market",
    name: "Market",
    description: "A hub of local trade. Raises national GDP, with diminishing returns.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.01,
    costAlpha: 1.6,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.00003,
    upkeepAlpha: 1.5,
    refundFraction: 0.5,
    effects: [effect(EFFECT_GDP, 0.04, 0.75)],
  },
  {
    id: "bank",
    name: "Bank",
    description: "Channels private wealth into the state coffers. Raises budget income.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.02,
    costAlpha: 1.7,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.00004,
    upkeepAlpha: 1.6,
    refundFraction: 0.5,
    effects: [effect(EFFECT_BUDGET_INCOME, 0.05, 0.7)],
  },
  {
    id: "research_lab",
    name: "Research lab",
    description: "Applies science to industry and government. Produces research points.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.015,
    costAlpha: 1.65,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.00005,
    upkeepAlpha: 1.55,
    refundFraction: 0.5,
    effects: [effect(EFFECT_RESEARCH, 1.0, 0.9)],
  },
  {
    id: "university",
    name: "University",
    description: "Higher education produces research and a little culture.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.025,
    costAlpha: 1.7,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.00008,
    upkeepAlpha: 1.6,
    refundFraction: 0.5,
    effects: [effect(EFFECT_RESEARCH, 2.0, 0.8), effect(EFFECT_CULTURE, 0.5, 0.7)],
  },
  {
    id: "museum",
    name: "Museum",
    description: "Preserves national heritage, strengthening culture against foreign ideas.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.02,
    costAlpha: 1.6,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.00005,
    upkeepAlpha: 1.55,
    refundFraction: 0.5,
    effects: [effect(EFFECT_CULTURE, 1.5, 0.85)],
  },
  {
    id: "cinema_studio",
    name: "Cinema studio",
    description: "Mass media spreads the nation's culture at home and abroad.",
    maxLevel: 10,
    baseCost: 0,
    costGdpFraction: 0.03,
    costAlpha: 1.75,
    baseUpkeep: 0,
    upkeepGdpFraction: 0.0001,
    upkeepAlpha: 1.65,
    refundFraction: 0.5,
    effects: [effect(EFFECT_CULTURE, 3.0, 0.7)],
  },
];

export const GOVERNMENTS = [
  {
    id: "republic",
    name: "Republic",
    description: "Rule by elected representatives. A balanced government that spreads its support across the economy, the treasury and the sciences.",
    baseCost: 0,
    costGdpFraction: 0.02,
    effects: [effect(EFFECT_GDP, 0.05, 1.0), effect(EFFECT_BUDGET_INCOME, 0.1, 1.0), effect(EFFECT_RESEARCH, 1.0, 1.0)],
  },
  {
    id: "monarchy",
    name: "Monarchy",
    description: "Rule by a hereditary sovereign. The crown favours commerce and tradition, lifting the economy and the nation's cultural output.",
    baseCost: 0,
    costGdpFraction: 0.03,
    effects: [effect(EFFECT_GDP, 0.1, 1.0), effect(EFFECT_CULTURE, 1.0, 1.0)],
  },
  {
    id: "technocracy",
    name: "Technocracy",
    description: "Rule by technical experts. A single-minded drive for progress pours resources into research while economic growth takes second place.",
    baseCost: 0,
    costGdpFraction: 0.04,
    effects: [effect(EFFECT_RESEARCH, 3.0, 1.0), effect(EFFECT_GDP, 0.03, 1.0)],
  },
];

export const TECHNOLOGIES = [
  {
    id: "scientific_method",
    name: "Scientific Method",
    description: "A disciplined approach to experiment and evidence. Lays the groundwork for every later technology.",
    cost: 20,
    prerequisites: [],
    effects: [effect(EFFECT_RESEARCH, 1.0, 1.0), effect(EFFECT_GDP, 0.02, 1.0)],
  },
  {
    id: "industrial_automation",
    name: "Industrial Automation",
    description: "Robotics and control systems take over the factory floor, lifting national output.",
    cost: 60,
    prerequisites: ["scientific_method"],
    effects: [effect(EFFECT_GDP, 0.08, 1.0)],
  },
  {
    id: "renewable_energy",
    name: "Renewable Energy",
    description: "Clean generation cuts waste and strengthens the public finances.",
    cost: 80,
    prerequisites: ["scientific_method"],
    effects: [effect(EFFECT_GDP, 0.03, 1.0), effect(EFFECT_BUDGET_INCOME, 0.05, 1.0)],
  },
  {
    id: "quantum_computing",
    name: "Quantum Computing",
    description: "Machines that reason in superposition. A step change in the pace of discovery.",
    cost: 120,
    prerequisites: ["scientific_method"],
    effects: [effect(EFFECT_RESEARCH, 4.0, 1.0)],
  },
  {
    id: "space_program",
    name: "Space Program",
    description: "Reaching orbit inspires the nation and spins off technology across the economy.",
    cost: 300,
    prerequisites: ["industrial_automation", "quantum_computing"],
    effects: [effect(EFFECT_CULTURE, 3.0, 1.0), effect(EFFECT_GDP, 0.05, 1.0)],
  },
];

export const ECONOMY = {
  baseGdpPerCapita: 10_000,
  basePopulation: 100_000,
  cityTileGdpMultiplier: 2.0,
  capitalTileGdpMultiplier: 2.5,
  citySurroundingGdpBonus: 0.3,
  gdpPerProductionPoint: 100_000,
  budgetGdpRate: 0.001,
  startingBudget: 0,
  basePopulationGrowthRate: 0.005,

  productionCapacity(gdp) {
    if (this.gdpPerProductionPoint <= 0) return 0;
    return gdp / this.gdpPerProductionPoint;
  },

  trainingHours(gdp, cost) {
    const capacity = this.productionCapacity(gdp);
    if (capacity <= 0) return 0;
    return cost / capacity;
  },

  budgetIncome(gdp, hours = 1) {
    return gdp * this.budgetGdpRate * hours;
  },

  populationGrowthFactor(hoursPerYear, hours = 1) {
    if (this.basePopulationGrowthRate <= 0 || hoursPerYear <= 0 || hours <= 0) return 0;
    return Math.pow(1 + this.basePopulationGrowthRate, hours / hoursPerYear) - 1;
  },
};

export const MAP_CONFIG = {
  mapSize: { x: 64, y: 40 },
  topology: "cylindrical",
  terrainSeed: 0,
  seaLevel: -0.2,
  falloffEnabled: true,
  falloffStart: 0.55,
  falloffStrength: 0.6,
  iceLatitude: 0.9,
  noise: {
    frequency: 0.06,
    octaves: 4,
    lacunarity: 2.0,
    gain: 0.5,
  },
  capitalMargin: 2,
  minCapitalDistance: 8,
  minCapitalLandmass: 40,
  citiesPerCiv: 10,
  citySpacing: 8,
};

// The terrain TileSet, flattened. `col` is the atlas column in terrain.png
// (one row, 7 tiles of 63x56); the class decides land/sea/ice and the
// minElevation bands place land tiles. `defenseBonus` is the fraction added to
// a unit's defense while it stands on the tile.
export const TERRAIN_TILES = [
  { col: 0, terrainType: "Forest", terrainClass: "Land", populationMultiplier: 0.3, gdpMultiplier: 0.5, movementCostMultiplier: 1.5, defenseBonus: 0.33, minElevation: 0.06 },
  { col: 1, terrainType: "Hills", terrainClass: "Land", populationMultiplier: 0.7, gdpMultiplier: 0.8, movementCostMultiplier: 1.8, defenseBonus: 0.33, minElevation: 0.2 },
  { col: 2, terrainType: "Ice", terrainClass: "Ice", populationMultiplier: 0, gdpMultiplier: 0, movementCostMultiplier: 4.0, defenseBonus: 0, minElevation: 0 },
  { col: 3, terrainType: "Land", terrainClass: "Land", populationMultiplier: 1.0, gdpMultiplier: 1.0, movementCostMultiplier: 1.0, defenseBonus: 0, minElevation: -0.08 },
  { col: 4, terrainType: "Land", terrainClass: "Land", populationMultiplier: 0.05, gdpMultiplier: 0.2, movementCostMultiplier: 3.0, defenseBonus: 0, minElevation: -0.2 },
  { col: 5, terrainType: "Sea", terrainClass: "Sea", populationMultiplier: 0, gdpMultiplier: 0, movementCostMultiplier: 0, defenseBonus: 0, minElevation: 0 },
  { col: 6, terrainType: "Mountain", terrainClass: "Land", populationMultiplier: 0.1, gdpMultiplier: 0.8, movementCostMultiplier: 5.0, defenseBonus: 1.0, minElevation: 0.34 },
];

// A city standing on a tile adds this fraction on top of the terrain's own
// defensive bonus.
export const CITY_DEFENSE_BONUS = 0.5;

export function protoUnitById(id) {
  return PROTO_UNITS.find((u) => u.id === id) || null;
}

export function buildingById(id) {
  return BUILDINGS.find((b) => b.id === id) || null;
}

export function governmentById(id) {
  return GOVERNMENTS.find((g) => g.id === id) || null;
}

export function technologyById(id) {
  return TECHNOLOGIES.find((t) => t.id === id) || null;
}