-- Organizations, members, and invitations for multi-tenant support

CREATE TABLE IF NOT EXISTS organizations (
    id              BIGSERIAL PRIMARY KEY,
    name            TEXT NOT NULL,
    slug            TEXT NOT NULL UNIQUE,
    plan            TEXT NOT NULL DEFAULT 'free',
    status          TEXT NOT NULL DEFAULT 'active',
    created_at      TEXT DEFAULT (CURRENT_TIMESTAMP::TEXT),
    updated_at      TEXT DEFAULT (CURRENT_TIMESTAMP::TEXT)
);

CREATE UNIQUE INDEX IF NOT EXISTS org_slug_idx
    ON organizations (slug);

CREATE INDEX IF NOT EXISTS org_plan_idx
    ON organizations (plan);

CREATE TABLE IF NOT EXISTS organization_members (
    id              BIGSERIAL PRIMARY KEY,
    org_id          BIGINT NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    user_id         BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    role            TEXT NOT NULL DEFAULT 'member',
    status          TEXT NOT NULL DEFAULT 'active',
    joined_at       TEXT DEFAULT (CURRENT_TIMESTAMP::TEXT)
);

CREATE UNIQUE INDEX IF NOT EXISTS org_member_unique
    ON organization_members (org_id, user_id);

CREATE INDEX IF NOT EXISTS org_members_org_id_idx
    ON organization_members (org_id);

CREATE INDEX IF NOT EXISTS org_members_user_id_idx
    ON organization_members (user_id);

CREATE TABLE IF NOT EXISTS invitations (
    id              BIGSERIAL PRIMARY KEY,
    org_id          BIGINT NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    email           TEXT NOT NULL,
    token           TEXT NOT NULL UNIQUE,
    role            TEXT NOT NULL DEFAULT 'member',
    invited_by      BIGINT REFERENCES users(id),
    status          TEXT NOT NULL DEFAULT 'pending',
    expires_at      TEXT NOT NULL,
    created_at      TEXT DEFAULT (CURRENT_TIMESTAMP::TEXT)
);

CREATE UNIQUE INDEX IF NOT EXISTS invitations_token_unique
    ON invitations (token);

CREATE INDEX IF NOT EXISTS invitations_status_idx
    ON invitations (status);