CREATE TABLE IF NOT EXISTS environments (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS users (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  email text NOT NULL UNIQUE,
  display_name text NOT NULL,
  password_hash text NOT NULL,
  email_verified_at timestamptz,
  created_at timestamptz NOT NULL DEFAULT now(),
  updated_at timestamptz NOT NULL DEFAULT now(),
  CHECK (email = lower(email)),
  CHECK (length(display_name) BETWEEN 1 AND 40)
);

CREATE TABLE IF NOT EXISTS email_verification_tokens (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  user_id integer NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  token_hash text NOT NULL UNIQUE,
  expires_at timestamptz NOT NULL,
  used_at timestamptz,
  created_at timestamptz NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS email_verification_tokens_user_id_idx
  ON email_verification_tokens(user_id);

CREATE TABLE IF NOT EXISTS user_sessions (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  user_id integer NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  token_hash text NOT NULL UNIQUE,
  expires_at timestamptz NOT NULL,
  created_at timestamptz NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS user_sessions_user_id_idx
  ON user_sessions(user_id);

CREATE TABLE IF NOT EXISTS skills (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE,
  has_item_drop boolean NOT NULL DEFAULT false
);

ALTER TABLE skills DROP COLUMN IF EXISTS subcategory;
ALTER TABLE skills ADD COLUMN IF NOT EXISTS has_item_drop boolean NOT NULL DEFAULT false;
CREATE UNIQUE INDEX IF NOT EXISTS skills_name_key ON skills(name);

CREATE TABLE IF NOT EXISTS favorite_things (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS pokemon (
  id integer PRIMARY KEY,
  name text NOT NULL UNIQUE,
  environment_id integer NOT NULL REFERENCES environments(id)
);

CREATE TABLE IF NOT EXISTS pokemon_skills (
  pokemon_id integer NOT NULL REFERENCES pokemon(id) ON DELETE CASCADE,
  skill_id integer NOT NULL REFERENCES skills(id),
  PRIMARY KEY (pokemon_id, skill_id)
);

CREATE TABLE IF NOT EXISTS pokemon_favorite_things (
  pokemon_id integer NOT NULL REFERENCES pokemon(id) ON DELETE CASCADE,
  favorite_thing_id integer NOT NULL REFERENCES favorite_things(id),
  PRIMARY KEY (pokemon_id, favorite_thing_id)
);

CREATE TABLE IF NOT EXISTS item_categories (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS item_usages (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS acquisition_methods (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS items (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE,
  category_id integer NOT NULL REFERENCES item_categories(id),
  usage_id integer REFERENCES item_usages(id),
  dyeable boolean NOT NULL DEFAULT false,
  dual_dyeable boolean NOT NULL DEFAULT false,
  pattern_editable boolean NOT NULL DEFAULT false,
  no_recipe boolean NOT NULL DEFAULT false
);

ALTER TABLE items ALTER COLUMN usage_id DROP NOT NULL;
ALTER TABLE items ADD COLUMN IF NOT EXISTS no_recipe boolean NOT NULL DEFAULT false;
ALTER TABLE items DROP COLUMN IF EXISTS no_habitat;

CREATE TABLE IF NOT EXISTS recipes (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  item_id integer NOT NULL UNIQUE REFERENCES items(id)
);

ALTER TABLE recipes ADD COLUMN IF NOT EXISTS item_id integer REFERENCES items(id);

DO $$
BEGIN
  IF EXISTS (
    SELECT 1
    FROM information_schema.columns
    WHERE table_name = 'items'
      AND column_name = 'recipe_id'
  ) THEN
    EXECUTE '
      UPDATE recipes r
      SET item_id = linked.item_id
      FROM (
        SELECT DISTINCT ON (recipe_id) recipe_id, id AS item_id
        FROM items
        WHERE recipe_id IS NOT NULL
        ORDER BY recipe_id, id
      ) linked
      WHERE r.id = linked.recipe_id
        AND r.item_id IS NULL
    ';
  END IF;
END $$;

DELETE FROM recipes WHERE item_id IS NULL;

ALTER TABLE recipes ALTER COLUMN item_id SET NOT NULL;
CREATE UNIQUE INDEX IF NOT EXISTS recipes_item_id_key ON recipes(item_id);
ALTER TABLE recipes DROP COLUMN IF EXISTS name;
ALTER TABLE items DROP COLUMN IF EXISTS recipe_id;

CREATE TABLE IF NOT EXISTS recipe_acquisition_methods (
  recipe_id integer NOT NULL REFERENCES recipes(id) ON DELETE CASCADE,
  acquisition_method_id integer NOT NULL REFERENCES acquisition_methods(id),
  PRIMARY KEY (recipe_id, acquisition_method_id)
);

DROP TABLE IF EXISTS item_item_tags;
DROP TABLE IF EXISTS item_tags;

CREATE TABLE IF NOT EXISTS item_acquisition_methods (
  item_id integer NOT NULL REFERENCES items(id) ON DELETE CASCADE,
  acquisition_method_id integer NOT NULL REFERENCES acquisition_methods(id),
  PRIMARY KEY (item_id, acquisition_method_id)
);

CREATE TABLE IF NOT EXISTS item_favorite_things (
  item_id integer NOT NULL REFERENCES items(id) ON DELETE CASCADE,
  favorite_thing_id integer NOT NULL REFERENCES favorite_things(id),
  PRIMARY KEY (item_id, favorite_thing_id)
);

CREATE TABLE IF NOT EXISTS pokemon_skill_item_drops (
  pokemon_id integer NOT NULL,
  skill_id integer NOT NULL,
  item_id integer NOT NULL REFERENCES items(id),
  PRIMARY KEY (pokemon_id, skill_id),
  FOREIGN KEY (pokemon_id, skill_id) REFERENCES pokemon_skills(pokemon_id, skill_id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS recipe_materials (
  recipe_id integer NOT NULL REFERENCES recipes(id) ON DELETE CASCADE,
  item_id integer NOT NULL REFERENCES items(id),
  quantity integer NOT NULL CHECK (quantity > 0),
  PRIMARY KEY (recipe_id, item_id)
);

CREATE TABLE IF NOT EXISTS maps (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS habitats (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  name text NOT NULL UNIQUE
);

CREATE TABLE IF NOT EXISTS habitat_recipe_items (
  habitat_id integer NOT NULL REFERENCES habitats(id) ON DELETE CASCADE,
  item_id integer NOT NULL REFERENCES items(id),
  quantity integer NOT NULL CHECK (quantity > 0),
  PRIMARY KEY (habitat_id, item_id)
);

CREATE TABLE IF NOT EXISTS habitat_pokemon (
  habitat_id integer NOT NULL REFERENCES habitats(id) ON DELETE CASCADE,
  pokemon_id integer NOT NULL REFERENCES pokemon(id) ON DELETE CASCADE,
  map_id integer NOT NULL REFERENCES maps(id),
  time_of_day text NOT NULL CHECK (time_of_day IN ('早晨', '中午', '傍晚', '晚上')),
  weather text NOT NULL CHECK (weather IN ('晴天', '阴天', '雨天')),
  rarity integer NOT NULL CHECK (rarity BETWEEN 1 AND 3),
  PRIMARY KEY (habitat_id, pokemon_id, map_id, time_of_day, weather)
);

ALTER TABLE environments ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE environments ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE environments ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE environments ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE skills ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE skills ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE skills ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE skills ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE favorite_things ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE favorite_things ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE favorite_things ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE favorite_things ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE pokemon ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE pokemon ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE pokemon ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE pokemon ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE item_categories ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE item_categories ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE item_categories ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE item_categories ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE item_usages ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE item_usages ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE item_usages ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE item_usages ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE acquisition_methods ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE acquisition_methods ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE acquisition_methods ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE acquisition_methods ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE items ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE items ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE items ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE items ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE recipes ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE recipes ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE recipes ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE recipes ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE maps ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE maps ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE maps ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE maps ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

ALTER TABLE habitats ADD COLUMN IF NOT EXISTS created_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE habitats ADD COLUMN IF NOT EXISTS updated_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
ALTER TABLE habitats ADD COLUMN IF NOT EXISTS created_at timestamptz NOT NULL DEFAULT now();
ALTER TABLE habitats ADD COLUMN IF NOT EXISTS updated_at timestamptz NOT NULL DEFAULT now();

CREATE TABLE IF NOT EXISTS wiki_edit_logs (
  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  entity_type text NOT NULL,
  entity_id integer NOT NULL,
  action text NOT NULL CHECK (action IN ('create', 'update', 'delete')),
  user_id integer REFERENCES users(id) ON DELETE SET NULL,
  created_at timestamptz NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS wiki_edit_logs_entity_idx
  ON wiki_edit_logs(entity_type, entity_id, created_at DESC);

CREATE INDEX IF NOT EXISTS wiki_edit_logs_user_id_idx
  ON wiki_edit_logs(user_id);