-- Calendar & Contacts API Schema

CREATE EXTENSION IF NOT EXISTS "pgcrypto";

-- Users
CREATE TABLE users (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    email TEXT NOT NULL,
    password_hash TEXT NOT NULL,
    timezone TEXT NOT NULL DEFAULT 'UTC',
    is_active BOOLEAN NOT NULL DEFAULT true,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

CREATE UNIQUE INDEX idx_users_email ON users (email) WHERE deleted_at IS NULL;

-- Refresh Tokens
CREATE TABLE refresh_tokens (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id),
    token_hash TEXT NOT NULL UNIQUE,
    expires_at TIMESTAMPTZ NOT NULL,
    revoked_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_refresh_tokens_user_id ON refresh_tokens (user_id);

-- API Keys
CREATE TABLE api_keys (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id),
    name TEXT NOT NULL,
    key_hash TEXT NOT NULL UNIQUE,
    scopes JSONB NOT NULL DEFAULT '{}',
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    revoked_at TIMESTAMPTZ
);

CREATE INDEX idx_api_keys_user_id ON api_keys (user_id);

-- Calendars
CREATE TABLE calendars (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    owner_id UUID NOT NULL REFERENCES users(id),
    name TEXT NOT NULL,
    color TEXT NOT NULL DEFAULT '#3B82F6',
    is_public BOOLEAN NOT NULL DEFAULT false,
    public_token TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

CREATE INDEX idx_calendars_owner_id ON calendars (owner_id);
CREATE UNIQUE INDEX idx_calendars_public_token ON calendars (public_token) WHERE public_token IS NOT NULL;

-- Calendar Members
CREATE TABLE calendar_members (
    calendar_id UUID NOT NULL REFERENCES calendars(id),
    user_id UUID NOT NULL REFERENCES users(id),
    role TEXT NOT NULL CHECK (role IN ('owner', 'editor', 'viewer')),
    PRIMARY KEY (calendar_id, user_id)
);

-- Events
CREATE TABLE events (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    calendar_id UUID NOT NULL REFERENCES calendars(id),
    title TEXT NOT NULL,
    description TEXT,
    location TEXT,
    start_time TIMESTAMPTZ NOT NULL,
    end_time TIMESTAMPTZ NOT NULL,
    timezone TEXT NOT NULL DEFAULT 'UTC',
    all_day BOOLEAN NOT NULL DEFAULT false,
    recurrence_rule TEXT,
    tags TEXT[] NOT NULL DEFAULT '{}',
    created_by UUID NOT NULL REFERENCES users(id),
    updated_by UUID NOT NULL REFERENCES users(id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

CREATE INDEX idx_events_calendar_start ON events (calendar_id, start_time);
CREATE INDEX idx_events_start_time ON events (start_time);
CREATE INDEX idx_events_tags ON events USING GIN (tags);

-- Event Reminders
CREATE TABLE event_reminders (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    event_id UUID NOT NULL REFERENCES events(id),
    minutes_before INTEGER NOT NULL CHECK (minutes_before >= 0 AND minutes_before <= 10080)
);

CREATE INDEX idx_event_reminders_event_id ON event_reminders (event_id);

-- Event Attendees
CREATE TABLE event_attendees (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    event_id UUID NOT NULL REFERENCES events(id),
    user_id UUID REFERENCES users(id),
    email TEXT,
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'declined', 'tentative'))
);

CREATE INDEX idx_event_attendees_event_id ON event_attendees (event_id);

-- Event Exceptions (for recurrence)
CREATE TABLE event_exceptions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    event_id UUID NOT NULL REFERENCES events(id),
    exception_date DATE NOT NULL,
    action TEXT NOT NULL DEFAULT 'skip' CHECK (action IN ('skip'))
);

CREATE INDEX idx_event_exceptions_event_id ON event_exceptions (event_id);

-- Event Attachments
CREATE TABLE event_attachments (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    event_id UUID NOT NULL REFERENCES events(id),
    file_url TEXT NOT NULL
);

CREATE INDEX idx_event_attachments_event_id ON event_attachments (event_id);

-- Contacts
CREATE TABLE contacts (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    owner_id UUID NOT NULL REFERENCES users(id),
    first_name TEXT,
    last_name TEXT,
    email TEXT,
    phone TEXT,
    company TEXT,
    notes TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

CREATE INDEX idx_contacts_owner_id ON contacts (owner_id);
CREATE INDEX idx_contacts_search ON contacts (owner_id, first_name, last_name, email, company);

-- Booking Links
CREATE TABLE booking_links (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    calendar_id UUID NOT NULL REFERENCES calendars(id),
    token TEXT NOT NULL UNIQUE,
    duration_minutes INTEGER NOT NULL,
    buffer_minutes INTEGER NOT NULL DEFAULT 0,
    timezone TEXT NOT NULL DEFAULT 'UTC',
    working_hours JSONB NOT NULL DEFAULT '{}',
    active BOOLEAN NOT NULL DEFAULT true,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_booking_links_token ON booking_links (token);

-- Audit Logs
CREATE TABLE audit_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    entity_type TEXT NOT NULL,
    entity_id UUID NOT NULL,
    action TEXT NOT NULL,
    user_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_audit_logs_entity ON audit_logs (entity_type, entity_id);

-- Calendar Subscriptions (external iCal URL sources)
CREATE TABLE calendar_subscriptions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    calendar_id UUID NOT NULL REFERENCES calendars(id),
    source_url TEXT NOT NULL,
    last_synced_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_calendar_subscriptions_calendar_id ON calendar_subscriptions (calendar_id);