import assert from "node:assert/strict";

const SNAKE_CASE_RE = /^[a-z0-9]+(?:_[a-z0-9]+)*$/;
const PHYSICAL_HITZONE_KEYS = ["cut", "blunt", "ammo"];
const ELEMENTAL_HITZONE_KEYS = ["fire", "water", "thunder", "ice", "dragon"];

function valueAt(object, path) {
  return path.split(".").reduce((value, key) => value?.[key], object);
}

function assertNonEmptyString(object, path) {
  const value = valueAt(object, path);
  assert.equal(typeof value, "string", `${path} must be a string`);
  assert.ok(value.trim(), `${path} must not be empty`);
}

export function assertStringArray(object, path, minLength = 1) {
  const value = valueAt(object, path);
  assert.ok(Array.isArray(value), `${path} must be an array`);
  assert.ok(value.length >= minLength, `${path} must contain at least ${minLength} item(s)`);
  value.forEach((item, index) => {
    assert.equal(typeof item, "string", `${path}[${index}] must be a string`);
    assert.ok(item.trim(), `${path}[${index}] must not be empty`);
  });
}

export function validateSiteContent(site) {
  [
    "brand.name",
    "brand.homeAriaLabel",
    "navigation.home",
    "navigation.toolboxes",
    "navigation.games",
    "navigation.mobileGames",
    "sidebar.badge",
    "sidebar.note",
    "topbar.dashboard",
    "topbar.toolbox",
    "topbar.games",
    "gamesPage.eyebrow",
    "gamesPage.title",
    "gamesPage.description",
    "gamesPage.emptyTitle",
    "gamesPage.emptyText",
    "home.hero.eyebrow",
    "home.hero.title",
    "home.hero.description",
    "home.hero.primaryAction",
    "home.hero.secondaryAction",
    "home.stats.toolboxSingular",
    "home.stats.toolboxPlural",
    "home.stats.toolSingular",
    "home.stats.toolPlural",
    "home.origin.eyebrow",
    "home.origin.title",
    "home.origin.visualAlt",
    "home.origin.dialogueAriaLabel",
    "home.origin.caption",
    "home.legal.copyright",
    "home.legal.disclaimer",
    "toolboxes.eyebrow",
    "toolboxes.title",
    "toolboxes.newButton",
    "toolboxes.importAll",
    "toolboxes.exportAll",
    "toolboxes.importOne",
    "toolboxes.summary",
    "toolboxes.storageHelp.title",
    "toolboxes.storageHelp.text",
    "toolboxes.emptyTitle",
    "toolboxes.emptyText"
  ].forEach((path) => assertNonEmptyString(site, path));

  assertStringArray(site, "toolboxes.storageHelp.items", 3);

  const lines = valueAt(site, "home.origin.lines");
  assert.ok(Array.isArray(lines), "home.origin.lines must be an array");
  assert.ok(lines.length >= 2, "home.origin.lines must contain at least 2 items");
  lines.forEach((line, index) => {
    assert.ok(["user", "app"].includes(line?.speaker), `home.origin.lines[${index}].speaker must be "user" or "app"`);
    assert.equal(typeof line?.text, "string", `home.origin.lines[${index}].text must be a string`);
    assert.ok(line.text.trim(), `home.origin.lines[${index}].text must not be empty`);
  });
}

function assertSnakeCase(value, path) {
  assert.equal(typeof value, "string", `${path} must be a string`);
  assert.match(value, SNAKE_CASE_RE, `${path} must be snake_case`);
}

function validateConditionValues(items, path) {
  assert.ok(Array.isArray(items), `${path} must be an array`);
  items.forEach((item, index) => {
    assertSnakeCase(item?.condition, `${path}[${index}].condition`);
    assert.ok(Array.isArray(item?.values), `${path}[${index}].values must be an array`);
    item.values.forEach((value, valueIndex) => assertSnakeCase(value, `${path}[${index}].values[${valueIndex}]`));
  });
}

export function validateMonsterData(monsters) {
  assert.ok(Array.isArray(monsters), "monsters must be an array");
  const ids = new Set();
  const names = new Set();

  monsters.forEach((monster, monsterIndex) => {
    const path = `monsters[${monsterIndex}]`;
    assert.equal(typeof monster.id, "number", `${path}.id must be a number`);
    assert.ok(Number.isInteger(monster.id), `${path}.id must be an integer`);
    assert.ok(!ids.has(monster.id), `${path}.id must be unique`);
    ids.add(monster.id);

    assertSnakeCase(monster.name, `${path}.name`);
    assert.ok(!names.has(monster.name), `${path}.name must be unique`);
    names.add(monster.name);
    assertSnakeCase(monster.type, `${path}.type`);
    validateConditionValues(monster.ailments, `${path}.ailments`);
    validateConditionValues(monster.weaknesses, `${path}.weaknesses`);
    validateConditionValues(monster.weakpoints, `${path}.weakpoints`);

    assert.equal(monster.damage, undefined, `${path}.damage must not be used`);
    assert.ok(Array.isArray(monster.hitzones), `${path}.hitzones must be an array`);
    assert.ok(monster.hitzones.length > 0, `${path}.hitzones must not be empty`);
    monster.hitzones.forEach((hitzone, hitzoneIndex) => {
      const hitzonePath = `${path}.hitzones[${hitzoneIndex}]`;
      assertSnakeCase(hitzone.name, `${hitzonePath}.name`);
      assert.equal(typeof hitzone.physical, "object", `${hitzonePath}.physical must be an object`);
      assert.equal(typeof hitzone.elemental, "object", `${hitzonePath}.elemental must be an object`);
      PHYSICAL_HITZONE_KEYS.forEach((key) => assert.equal(typeof hitzone.physical[key], "number", `${hitzonePath}.physical.${key} must be a number`));
      ELEMENTAL_HITZONE_KEYS.forEach((key) => assert.equal(typeof hitzone.elemental[key], "number", `${hitzonePath}.elemental.${key} must be a number`));
    });
  });
}

export function validateEndemicData(endemicPayload) {
  ["endemicLife", "aquaticLife"].forEach((collection) => {
    assert.ok(Array.isArray(endemicPayload[collection]), `${collection} must be an array`);
    endemicPayload[collection].forEach((item, itemIndex) => {
      const path = `${collection}[${itemIndex}]`;
      assertSnakeCase(item.name, `${path}.name`);
      if (item.description) assertSnakeCase(item.description, `${path}.description`);
      validateConditionValues(item.locations, `${path}.locations`);
    });
  });
}

export function validateTranslationKeys(translations, path) {
  Object.keys(translations).forEach((key) => {
    assert.ok(!/\s/.test(key), `${path}.${key} must not contain spaces`);
  });
}

export function validateDiablo4Affixes(payload) {
  assert.ok(Array.isArray(payload.categories), "diablo4.categories must be an array");
  assert.ok(payload.categories.length > 0, "diablo4.categories must not be empty");
  assert.ok(Array.isArray(payload.affixes), "diablo4.affixes must be an array");
  assert.ok(payload.affixes.length > 0, "diablo4.affixes must not be empty");

  const ids = new Set();
  const categoryIds = payload.categories.map((category, index) => {
    assertSnakeCase(category.id, `diablo4.categories[${index}].id`);
    assertNonEmptyString({ category }, "category.label");
    assertSnakeCase(category.icon, `diablo4.categories[${index}].icon`);
    assertSnakeCase(category.tone, `diablo4.categories[${index}].tone`);
    return category.id;
  });

  payload.affixes.forEach((affix, index) => {
    assertSnakeCase(affix.id, `diablo4.affixes[${index}].id`);
    assert.ok(!ids.has(affix.id), `diablo4.affixes[${index}].id must be unique`);
    ids.add(affix.id);
    assertNonEmptyString({ affix }, "affix.label");
    assert.ok(Array.isArray(affix.categories), `diablo4.affixes[${index}].categories must be an array`);
    affix.categories.forEach((category, categoryIndex) => {
      assertSnakeCase(category, `diablo4.affixes[${index}].categories[${categoryIndex}]`);
      assert.ok(categoryIds.includes(category), `diablo4.affixes[${index}].categories[${categoryIndex}] must exist in diablo4.categories`);
    });
  });
}