-- Initial schema for Favoritter.
-- Creates core tables: users, sessions, signup_requests, faves, tags, fave_tags, site_settings.

CREATE TABLE users (
    id                   INTEGER PRIMARY KEY,
    username             TEXT    NOT NULL UNIQUE COLLATE NOCASE,
    display_name         TEXT    NOT NULL DEFAULT '',
    bio                  TEXT    NOT NULL DEFAULT '',
    avatar_path          TEXT    NOT NULL DEFAULT '',
    password_hash        TEXT    NOT NULL,
    role                 TEXT    NOT NULL DEFAULT 'user' CHECK (role IN ('user', 'admin')),
    profile_visibility   TEXT    NOT NULL DEFAULT 'public' CHECK (profile_visibility IN ('public', 'limited')),
    default_fave_privacy TEXT    NOT NULL DEFAULT 'public' CHECK (default_fave_privacy IN ('public', 'private')),
    must_reset_password  INTEGER NOT NULL DEFAULT 0,
    disabled             INTEGER NOT NULL DEFAULT 0,
    created_at           TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    updated_at           TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
);

CREATE TABLE sessions (
    token      TEXT    PRIMARY KEY,
    user_id    INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    expires_at TEXT    NOT NULL,
    created_at TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
);
CREATE INDEX idx_sessions_user_id ON sessions(user_id);
CREATE INDEX idx_sessions_expires ON sessions(expires_at);

CREATE TABLE signup_requests (
    id            INTEGER PRIMARY KEY,
    username      TEXT    NOT NULL UNIQUE COLLATE NOCASE,
    password_hash TEXT    NOT NULL,
    status        TEXT    NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'approved', 'rejected')),
    created_at    TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    reviewed_at   TEXT,
    reviewed_by   INTEGER REFERENCES users(id)
);

CREATE TABLE faves (
    id          INTEGER PRIMARY KEY,
    user_id     INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    description TEXT    NOT NULL,
    url         TEXT    NOT NULL DEFAULT '',
    image_path  TEXT    NOT NULL DEFAULT '',
    privacy     TEXT    NOT NULL DEFAULT 'public' CHECK (privacy IN ('public', 'private')),
    created_at  TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    updated_at  TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
);
CREATE INDEX idx_faves_user_id ON faves(user_id);
CREATE INDEX idx_faves_privacy ON faves(privacy);
CREATE INDEX idx_faves_created ON faves(created_at);

CREATE TABLE tags (
    id   INTEGER PRIMARY KEY,
    name TEXT    NOT NULL UNIQUE COLLATE NOCASE
);

CREATE TABLE fave_tags (
    fave_id INTEGER NOT NULL REFERENCES faves(id) ON DELETE CASCADE,
    tag_id  INTEGER NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
    PRIMARY KEY (fave_id, tag_id)
);
CREATE INDEX idx_fave_tags_tag_id ON fave_tags(tag_id);

CREATE TABLE site_settings (
    id               INTEGER PRIMARY KEY CHECK (id = 1),
    site_name        TEXT NOT NULL DEFAULT 'Favoritter',
    site_description TEXT NOT NULL DEFAULT '',
    signup_mode      TEXT NOT NULL DEFAULT 'open' CHECK (signup_mode IN ('open', 'requests', 'closed')),
    updated_at       TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
);
INSERT INTO site_settings (id) VALUES (1);