-- =====================================================
-- Migration 002: Enhanced Messages Support
-- =====================================================
-- Adds fields for:
-- - Group participant tracking (participant_jid, push_name)
-- - Media caching (media_cached, media_local_path, media_size_bytes)
-- - Message reactions
-- - Presence caching
-- =====================================================

-- Add participant tracking fields to messages
ALTER TABLE messages ADD COLUMN IF NOT EXISTS participant_jid VARCHAR(100);
ALTER TABLE messages ADD COLUMN IF NOT EXISTS push_name VARCHAR(255);

-- Add media caching fields
ALTER TABLE messages ADD COLUMN IF NOT EXISTS media_cached BOOLEAN DEFAULT FALSE;
ALTER TABLE messages ADD COLUMN IF NOT EXISTS media_local_path TEXT;
ALTER TABLE messages ADD COLUMN IF NOT EXISTS media_size_bytes BIGINT;

-- Create table for message reactions
CREATE TABLE IF NOT EXISTS message_reactions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    message_id UUID NOT NULL REFERENCES messages(id) ON DELETE CASCADE,
    instance_id UUID NOT NULL REFERENCES instances(id) ON DELETE CASCADE,
    reactor_jid VARCHAR(100) NOT NULL,
    reactor_name VARCHAR(255),
    emoji VARCHAR(20) NOT NULL,
    timestamp TIMESTAMPTZ DEFAULT NOW(),

    CONSTRAINT unique_reaction UNIQUE (message_id, reactor_jid)
);

CREATE INDEX IF NOT EXISTS idx_reactions_message ON message_reactions(message_id);
CREATE INDEX IF NOT EXISTS idx_reactions_instance ON message_reactions(instance_id);

-- Create table for presence caching (optional, for "last seen" persistence)
CREATE TABLE IF NOT EXISTS presence_cache (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    instance_id UUID NOT NULL REFERENCES instances(id) ON DELETE CASCADE,
    jid VARCHAR(100) NOT NULL,
    presence VARCHAR(20) CHECK (presence IN ('available', 'unavailable', 'composing', 'recording', 'paused')),
    last_seen TIMESTAMPTZ,
    updated_at TIMESTAMPTZ DEFAULT NOW(),

    CONSTRAINT unique_presence UNIQUE (instance_id, jid)
);

CREATE INDEX IF NOT EXISTS idx_presence_instance ON presence_cache(instance_id);

-- Create table for group metadata caching
CREATE TABLE IF NOT EXISTS group_metadata (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    instance_id UUID NOT NULL REFERENCES instances(id) ON DELETE CASCADE,
    jid VARCHAR(100) NOT NULL,
    subject VARCHAR(255),
    description TEXT,
    owner_jid VARCHAR(100),
    participants JSONB DEFAULT '[]',
    announce_only BOOLEAN DEFAULT FALSE,
    restrict_edit BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMPTZ DEFAULT NOW(),
    updated_at TIMESTAMPTZ DEFAULT NOW(),

    CONSTRAINT unique_group UNIQUE (instance_id, jid)
);

CREATE INDEX IF NOT EXISTS idx_group_metadata_instance ON group_metadata(instance_id);

-- Add trigger for presence_cache updated_at
CREATE TRIGGER update_presence_cache_updated_at
    BEFORE UPDATE ON presence_cache
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- Add trigger for group_metadata updated_at
CREATE TRIGGER update_group_metadata_updated_at
    BEFORE UPDATE ON group_metadata
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- Add index for media caching lookups
CREATE INDEX IF NOT EXISTS idx_messages_media_cached ON messages(media_cached) WHERE media_cached = TRUE;

-- Add last_message_type to chats for preview icons
ALTER TABLE chats ADD COLUMN IF NOT EXISTS last_message_type VARCHAR(50);