-- OCR Logs Table for storing cascade OCR results
-- This allows admins to view OCR recognition results from mobile devices

CREATE TABLE IF NOT EXISTS ocr_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID REFERENCES auth.users(id) ON DELETE SET NULL,
    bottle_id UUID REFERENCES bottles(id) ON DELETE SET NULL,
    
    -- Image data
    image_url TEXT,  -- URL to the scanned image
    image_thumbnail TEXT,  -- Base64 thumbnail for quick preview
    
    -- Detected fields
    raw_text TEXT,  -- All detected text joined
    detected_texts JSONB,  -- Array of individual text detections
    
    -- Extracted data
    distillery TEXT,
    distillery_source TEXT,  -- 'fuzzy', 'ai', 'manual'
    bottle_name TEXT,
    abv DECIMAL(5,2),
    age INTEGER,
    vintage TEXT,
    volume TEXT,
    category TEXT,
    
    -- Meta
    confidence INTEGER,  -- 0-100
    device_info TEXT,  -- User agent or device type
    ocr_method TEXT,  -- 'text_detector', 'fallback', etc.
    processing_time_ms INTEGER,
    
    -- Timestamps
    created_at TIMESTAMPTZ DEFAULT now(),
    updated_at TIMESTAMPTZ DEFAULT now()
);

-- Index for efficient queries
CREATE INDEX IF NOT EXISTS idx_ocr_logs_user_id ON ocr_logs(user_id);
CREATE INDEX IF NOT EXISTS idx_ocr_logs_created_at ON ocr_logs(created_at DESC);
CREATE INDEX IF NOT EXISTS idx_ocr_logs_distillery ON ocr_logs(distillery);

-- RLS Policies
ALTER TABLE ocr_logs ENABLE ROW LEVEL SECURITY;

-- Users can view their own logs
CREATE POLICY "Users can view own ocr_logs"
    ON ocr_logs FOR SELECT
    USING (auth.uid() = user_id);

-- Users can insert their own logs
CREATE POLICY "Users can insert own ocr_logs"
    ON ocr_logs FOR INSERT
    WITH CHECK (auth.uid() = user_id);

-- Admins can view all logs
CREATE POLICY "Admins can view all ocr_logs"
    ON ocr_logs FOR SELECT
    USING (
        EXISTS (
            SELECT 1 FROM admin_users
            WHERE admin_users.user_id = auth.uid()
        )
    );

-- Trigger for updated_at
CREATE OR REPLACE FUNCTION update_ocr_logs_updated_at()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = now();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER trigger_ocr_logs_updated_at
    BEFORE UPDATE ON ocr_logs
    FOR EACH ROW
    EXECUTE FUNCTION update_ocr_logs_updated_at();