-- Configuration tables schema

-- Stock threshold configurations
CREATE TABLE IF NOT EXISTS stock_thresholds (
    id INT NOT NULL,
    category_id BIGINT,  -- NULL means default/global threshold
    vendor VARCHAR(100), -- NULL means applies to all vendors
    critical_days INT NOT NULL DEFAULT 7,
    reorder_days INT NOT NULL DEFAULT 14,
    overstock_days INT NOT NULL DEFAULT 90,
    low_stock_threshold INT NOT NULL DEFAULT 5,
    min_reorder_quantity INT NOT NULL DEFAULT 1,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (category_id) REFERENCES categories(cat_id) ON DELETE CASCADE,
    UNIQUE KEY unique_category_vendor (category_id, vendor),
    INDEX idx_st_metrics (category_id, vendor)
);

-- Lead time threshold configurations
CREATE TABLE IF NOT EXISTS lead_time_thresholds (
    id INT NOT NULL,
    category_id BIGINT,  -- NULL means default/global threshold
    vendor VARCHAR(100), -- NULL means applies to all vendors
    target_days INT NOT NULL DEFAULT 14,
    warning_days INT NOT NULL DEFAULT 21,
    critical_days INT NOT NULL DEFAULT 30,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (category_id) REFERENCES categories(cat_id) ON DELETE CASCADE,
    UNIQUE KEY unique_category_vendor (category_id, vendor)
);

-- Sales velocity window configurations
CREATE TABLE IF NOT EXISTS sales_velocity_config (
    id INT NOT NULL,
    category_id BIGINT,  -- NULL means default/global threshold
    vendor VARCHAR(100), -- NULL means applies to all vendors
    daily_window_days INT NOT NULL DEFAULT 30,
    weekly_window_days INT NOT NULL DEFAULT 7,
    monthly_window_days INT NOT NULL DEFAULT 90,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (category_id) REFERENCES categories(cat_id) ON DELETE CASCADE,
    UNIQUE KEY unique_category_vendor (category_id, vendor),
    INDEX idx_sv_metrics (category_id, vendor)
);

-- ABC Classification configurations
CREATE TABLE IF NOT EXISTS abc_classification_config (
    id INT NOT NULL PRIMARY KEY,
    a_threshold DECIMAL(5,2) NOT NULL DEFAULT 20.0,
    b_threshold DECIMAL(5,2) NOT NULL DEFAULT 50.0,
    classification_period_days INT NOT NULL DEFAULT 90,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

-- Safety stock configurations
CREATE TABLE IF NOT EXISTS safety_stock_config (
    id INT NOT NULL,
    category_id BIGINT,  -- NULL means default/global threshold
    vendor VARCHAR(100), -- NULL means applies to all vendors
    coverage_days INT NOT NULL DEFAULT 14,
    service_level DECIMAL(5,2) NOT NULL DEFAULT 95.0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (category_id) REFERENCES categories(cat_id) ON DELETE CASCADE,
    UNIQUE KEY unique_category_vendor (category_id, vendor),
    INDEX idx_ss_metrics (category_id, vendor)
);

-- Turnover rate configurations
CREATE TABLE IF NOT EXISTS turnover_config (
    id INT NOT NULL,
    category_id BIGINT,  -- NULL means default/global threshold
    vendor VARCHAR(100), -- NULL means applies to all vendors
    calculation_period_days INT NOT NULL DEFAULT 30,
    target_rate DECIMAL(10,2) NOT NULL DEFAULT 1.0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    FOREIGN KEY (category_id) REFERENCES categories(cat_id) ON DELETE CASCADE,
    UNIQUE KEY unique_category_vendor (category_id, vendor)
);

-- Create table for sales seasonality factors
CREATE TABLE IF NOT EXISTS sales_seasonality (
    month INT NOT NULL,
    seasonality_factor DECIMAL(5,3) DEFAULT 0,
    last_updated TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (month),
    CHECK (month BETWEEN 1 AND 12),
    CHECK (seasonality_factor BETWEEN -1.0 AND 1.0)
);

-- Insert default global thresholds if not exists
INSERT INTO stock_thresholds (id, category_id, vendor, critical_days, reorder_days, overstock_days)
VALUES (1, NULL, NULL, 7, 14, 90) AS new_values
ON DUPLICATE KEY UPDATE 
    critical_days = new_values.critical_days,
    reorder_days = new_values.reorder_days,
    overstock_days = new_values.overstock_days;

INSERT INTO lead_time_thresholds (id, category_id, vendor, target_days, warning_days, critical_days)
VALUES (1, NULL, NULL, 14, 21, 28) AS new_values
ON DUPLICATE KEY UPDATE 
    target_days = new_values.target_days,
    warning_days = new_values.warning_days,
    critical_days = new_values.critical_days;

INSERT INTO sales_velocity_config (id, category_id, vendor, daily_window_days, weekly_window_days, monthly_window_days)
VALUES (1, NULL, NULL, 30, 90, 180) AS new_values
ON DUPLICATE KEY UPDATE 
    daily_window_days = new_values.daily_window_days,
    weekly_window_days = new_values.weekly_window_days,
    monthly_window_days = new_values.monthly_window_days;

INSERT INTO abc_classification_config (id, a_threshold, b_threshold, classification_period_days)
VALUES (1, 80, 95, 180) AS new_values
ON DUPLICATE KEY UPDATE 
    a_threshold = new_values.a_threshold,
    b_threshold = new_values.b_threshold,
    classification_period_days = new_values.classification_period_days;

INSERT INTO safety_stock_config (id, category_id, vendor, coverage_days, service_level)
VALUES (1, NULL, NULL, 14, 95.0) AS new_values
ON DUPLICATE KEY UPDATE
    coverage_days = new_values.coverage_days,
    service_level = new_values.service_level;

INSERT INTO turnover_config (id, category_id, vendor, calculation_period_days, target_rate)
VALUES (1, NULL, NULL, 30, 1.0) AS new_values
ON DUPLICATE KEY UPDATE
    calculation_period_days = new_values.calculation_period_days,
    target_rate = new_values.target_rate;

-- Insert default seasonality factors (neutral)
INSERT INTO sales_seasonality (month, seasonality_factor)
VALUES 
    (1, 0), (2, 0), (3, 0), (4, 0), (5, 0), (6, 0),
    (7, 0), (8, 0), (9, 0), (10, 0), (11, 0), (12, 0)
ON DUPLICATE KEY UPDATE last_updated = CURRENT_TIMESTAMP;

-- View to show thresholds with category names
CREATE OR REPLACE VIEW stock_thresholds_view AS
SELECT 
    st.*,
    c.name as category_name,
    CASE 
        WHEN st.category_id IS NULL AND st.vendor IS NULL THEN 'Global Default'
        WHEN st.category_id IS NULL THEN CONCAT('Vendor: ', st.vendor)
        WHEN st.vendor IS NULL THEN CONCAT('Category: ', c.name)
        ELSE CONCAT('Category: ', c.name, ' / Vendor: ', st.vendor)
    END as threshold_scope
FROM 
    stock_thresholds st
LEFT JOIN 
    categories c ON st.category_id = c.cat_id
ORDER BY 
    CASE 
        WHEN st.category_id IS NULL AND st.vendor IS NULL THEN 1
        WHEN st.category_id IS NULL THEN 2
        WHEN st.vendor IS NULL THEN 3
        ELSE 4
    END,
    c.name,
    st.vendor;

CREATE TABLE IF NOT EXISTS sync_status (
    table_name VARCHAR(50) PRIMARY KEY,
    last_sync_timestamp TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    last_sync_id BIGINT,
    INDEX idx_last_sync (last_sync_timestamp)
);

CREATE TABLE IF NOT EXISTS import_history (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    table_name VARCHAR(50) NOT NULL,
    start_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    end_time TIMESTAMP NULL,
    duration_seconds INT,
    duration_minutes DECIMAL(10,2) GENERATED ALWAYS AS (duration_seconds / 60.0) STORED,
    records_added INT DEFAULT 0,
    records_updated INT DEFAULT 0,
    is_incremental BOOLEAN DEFAULT FALSE,
    status ENUM('running', 'completed', 'failed', 'cancelled') DEFAULT 'running',
    error_message TEXT,
    additional_info JSON,
    INDEX idx_table_time (table_name, start_time),
    INDEX idx_status (status)
);

-- Configuration for metric calculation windows
CREATE TABLE IF NOT EXISTS metric_calculation_config (
    id INT NOT NULL PRIMARY KEY,
    calculation_window_days INT NOT NULL DEFAULT 90,
    incremental_enabled BOOLEAN DEFAULT TRUE,
    force_full_calculation_days INT DEFAULT 7,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);



-- Insert default metric calculation config
INSERT INTO metric_calculation_config (id, calculation_window_days, incremental_enabled, force_full_calculation_days)
VALUES (1, 90, TRUE, 7) AS new_values
ON DUPLICATE KEY UPDATE
    calculation_window_days = new_values.calculation_window_days,
    incremental_enabled = new_values.incremental_enabled,
    force_full_calculation_days = new_values.force_full_calculation_days;