-- Migration: Add standard_rates table
-- Run this migration to add the standard_rates table for supervisor-managed default rates

-- Create standard_rates table (default rates for comparison with contractor rates)
CREATE TABLE IF NOT EXISTS standard_rates (
    id INT AUTO_INCREMENT PRIMARY KEY,
    sub_department_id INT,
    activity VARCHAR(255),
    rate DECIMAL(10, 2) NOT NULL,
    effective_date DATE NOT NULL,
    created_by INT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (sub_department_id) REFERENCES sub_departments(id) ON DELETE SET NULL,
    FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE CASCADE
);

-- Create indexes for standard_rates
CREATE INDEX idx_standard_rates_subdept ON standard_rates(sub_department_id);
CREATE INDEX idx_standard_rates_date ON standard_rates(effective_date);
CREATE INDEX idx_standard_rates_created_by ON standard_rates(created_by);

-- Verify table was created
SELECT 'standard_rates table created successfully' AS status;