-- Enable foreign key support
PRAGMA foreign_keys = ON;
PRAGMA journal_mode = WAL;
PRAGMA cache_size = -2000;
PRAGMA mmap_size = 30000000000;


-- Words table
CREATE TABLE expressions(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    spelling TEXT NOT NULL,
    ipa      TEXT NOT NULL,
    language_id INTEGER NOT NULL,
    frequency INTEGER,
    type TEXT NOT NULL,
    subtype TEXT,
    FOREIGN KEY (language_id) REFERENCES languages(id)
);
CREATE INDEX idx_words_spelling ON expressions(spelling);
CREATE INDEX idx_words_type ON expressions(type);
CREATE INDEX idx_words_subtype ON expressions(subtype);
CREATE INDEX idx_words_language_id ON expressions(language_id);

CREATE TABLE expression_words(
    expression_id INTEGER NOT NULL,
    word_id INTEGER NOT NULL,
    PRIMARY KEY (expression_id, word_id),
    FOREIGN KEY (word_id) REFERENCES expressions(id),
    FOREIGN KEY (expression_id) REFERENCES expressions(id)
);


-- Languages table
CREATE TABLE languages (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL
);

-- Parts of Speech table
CREATE TABLE parts_of_speech (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL
);

-- Categories table (for noun and verb categories)
CREATE TABLE categories (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    part_of_speech_id INTEGER NOT NULL,
    FOREIGN KEY (part_of_speech_id) REFERENCES parts_of_speech(id)
);
CREATE INDEX idx_categories_name ON categories(name);
CREATE INDEX idx_categories_part_of_speech_id ON categories(part_of_speech_id);

-- Word Categories junction table
CREATE TABLE word_categories (
    word_id INTEGER NOT NULL,
    category_id INTEGER NOT NULL,
    PRIMARY KEY (word_id, category_id),
    FOREIGN KEY (word_id) REFERENCES words(id),
    FOREIGN KEY (category_id) REFERENCES categories(id)
);
CREATE INDEX idx_word_categories_category_id ON word_categories(category_id);

-- Example data insertion
INSERT INTO languages (name) VALUES ('en-us');
INSERT INTO languages (name) VALUES ('th');
INSERT INTO languages (name) VALUES ('zh-cn');
INSERT INTO languages (name) VALUES ('zh-hk');
INSERT INTO languages (name) VALUES ('ja-jp');

INSERT INTO parts_of_speech (name) VALUES ('noun'), ('verb'), ('adjective'), ('adverb'), ('pronoun'), ('adposition'), ('conjunction'), ('unknown');

INSERT INTO categories (name, part_of_speech_id) VALUES
('countable', 1),
('uncountable', 1),
('animate', 1),
('inanimate', 1),
('spatial', 1),
('temporal', 1),
('abstract', 1),
('noun', 1),
-- verbs
('transitive', 2),
('intransitive', 2),
('action', 2),
('mental', 2),
('auxiliar', 2),
('verb', 2),
-- adjectives
('adjective', 3),
-- adverbs
('adverb', 4),
-- pronouns
('nominative', 5),
('accusative', 5),
('genitive', 5),
-- adpositions
('preposition', 6),
('postposition', 6),
('circumposition', 6),
-- conjunctions
('conjunction', 7),
-- ?
('unknown', 8);

-- -- Example word insertion
-- INSERT INTO words (spelling, ipa, language_id) VALUES ('book', 'bʊk', 1);

-- -- Categorize 'book' as a countable, inanimate noun
-- INSERT INTO word_categories (word_id, category_id) 
-- SELECT 
--     (SELECT id FROM words WHERE spelling = 'book'),
--     id 
-- FROM categories 
-- WHERE name IN ('countable', 'inanimate');

-- -- Example verb insertion
-- INSERT INTO words (spelling, ipa, language_id) VALUES ('think','θɪŋk', 1);

-- -- Categorize 'think' as an intransitive, mental verb
-- INSERT INTO word_categories (word_id, category_id) 
-- SELECT 
--     (SELECT id FROM words WHERE spelling = 'think'),
--     id 
-- FROM categories 
-- WHERE name IN ('intransitive', 'mental');


-- Progress
CREATE TABLE users(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    creds TEXT NOT NULL
);

-- Lessons
CREATE TABLE lessons(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    text TEXT NOT NULL
);
CREATE TABLE cards(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    text TEXT NOT NULL,
    note TEXT
);
CREATE TABLE cards_expressions(
  expression_id INTEGER NOT NULL,
  card_id INTEGER NOT NULL,
  PRIMARY KEY (card_id, expression_id),
  FOREIGN KEY (card_id) REFERENCES cards(id),
  FOREIGN KEY (expression_id) REFERENCES expressions(id)
);
CREATE TABLE cards_lessons(
  lesson_id INTEGER,
  card_id INTEGER NOT NULL,
  PRIMARY KEY (card_id, lesson_id),
  FOREIGN KEY (card_id) REFERENCES cards(id),
  FOREIGN KEY (lesson_id) REFERENCES lessons(id)
);

CREATE TABLE attempts(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    timestamp INTEGER NOT NULL,
    card_id INTEGER NOT NULL,
    good INTEGER NOT NULL, -- 0 or 1
    FOREIGN KEY (user_id) REFERENCES users(id)
    FOREIGN KEY (card_id) REFERENCES cards(id)
);

-- Index to query attempts on a specific card
CREATE INDEX idx_attempts_card ON attempts(card_id);

-- Index to query attempts for a specific user
CREATE INDEX idx_attempts_user ON attempts(user_id);

-- (Optional) Index to query attempts by user and resource (useful if you often query by both)
CREATE INDEX idx_attempts_user_resource ON attempts(user_id, card_id);
CREATE INDEX idx_cards_resources
ON cards_expressions(expression_id, card_id);

-- CREATE TRIGGER IF NOT EXISTS populate_cards_resources
-- AFTER INSERT ON cards
-- FOR EACH ROW
-- BEGIN
--     -- Insert matching words into cards_resources
--     INSERT INTO cards_expressions(card_id, expression_id)
--     SELECT NEW.id, w.id 
--     FROM expressions w 
--     WHERE NEW.text LIKE '%' || w.spelling || '%';
-- END;