-- Minimal Database Setup - Just what's needed for uploads to work
-- This won't conflict with existing tables

-- 1. Create update function if it doesn't exist
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

-- 2. Drop and recreate documents table (to ensure clean state)
DROP TABLE IF EXISTS processing_jobs CASCADE;
DROP TABLE IF EXISTS documents CASCADE;

-- 3. Create documents table (user_id as VARCHAR to match Firebase UID)
CREATE TABLE documents (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id VARCHAR(255) NOT NULL,
    original_file_name VARCHAR(500) NOT NULL,
    file_path VARCHAR(1000) NOT NULL,
    file_size BIGINT NOT NULL CHECK (file_size > 0),
    uploaded_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    status VARCHAR(50) NOT NULL DEFAULT 'uploaded',
    extracted_text TEXT,
    generated_summary TEXT,
    summary_markdown_path VARCHAR(1000),
    summary_pdf_path VARCHAR(1000),
    processing_started_at TIMESTAMP WITH TIME ZONE,
    processing_completed_at TIMESTAMP WITH TIME ZONE,
    error_message TEXT,
    analysis_data JSONB,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_documents_user_id ON documents(user_id);
CREATE INDEX idx_documents_status ON documents(status);
CREATE INDEX idx_documents_uploaded_at ON documents(uploaded_at);
CREATE INDEX idx_documents_user_status ON documents(user_id, status);

CREATE TRIGGER update_documents_updated_at
    BEFORE UPDATE ON documents
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- 4. Create processing_jobs table
CREATE TABLE processing_jobs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    document_id UUID NOT NULL REFERENCES documents(id) ON DELETE CASCADE,
    user_id VARCHAR(255) NOT NULL,
    status VARCHAR(50) NOT NULL DEFAULT 'pending',
    attempts INTEGER NOT NULL DEFAULT 0,
    max_attempts INTEGER NOT NULL DEFAULT 3,
    options JSONB,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    started_at TIMESTAMP WITH TIME ZONE,
    completed_at TIMESTAMP WITH TIME ZONE,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    error TEXT,
    last_error_at TIMESTAMP WITH TIME ZONE,
    result JSONB
);

CREATE INDEX idx_processing_jobs_status ON processing_jobs(status);
CREATE INDEX idx_processing_jobs_created_at ON processing_jobs(created_at);
CREATE INDEX idx_processing_jobs_document_id ON processing_jobs(document_id);
CREATE INDEX idx_processing_jobs_user_id ON processing_jobs(user_id);
CREATE INDEX idx_processing_jobs_pending ON processing_jobs(status, created_at) WHERE status = 'pending';

CREATE TRIGGER update_processing_jobs_updated_at
    BEFORE UPDATE ON processing_jobs
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- 5. Verify tables were created
SELECT
    table_name,
    (SELECT COUNT(*) FROM information_schema.columns WHERE table_name = t.table_name) as column_count
FROM information_schema.tables t
WHERE table_schema = 'public'
AND table_name IN ('documents', 'processing_jobs')
ORDER BY table_name;