-- ===========================================
-- MECANICAS DIESEL - Schema parts_management
-- ===========================================
-- Inventario de refacciones especifico del taller

SET search_path TO parts_management, public;

-- -------------------------------------------
-- PART_CATEGORIES - Categorías de refacciones
-- -------------------------------------------
CREATE TABLE parts_management.part_categories (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    name VARCHAR(100) NOT NULL,
    description VARCHAR(300),

    parent_id UUID REFERENCES parts_management.part_categories(id),

    sort_order INTEGER DEFAULT 0,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_part_categories_tenant ON parts_management.part_categories(tenant_id);
CREATE INDEX idx_part_categories_parent ON parts_management.part_categories(parent_id);

CREATE TRIGGER trg_part_categories_updated_at
    BEFORE UPDATE ON parts_management.part_categories
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

SELECT create_tenant_rls_policies('parts_management', 'part_categories');

-- -------------------------------------------
-- SUPPLIERS - Proveedores
-- -------------------------------------------
CREATE TABLE parts_management.suppliers (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    name VARCHAR(200) NOT NULL,
    legal_name VARCHAR(300),
    rfc VARCHAR(13),

    contact_name VARCHAR(200),
    email VARCHAR(200),
    phone VARCHAR(20),

    address TEXT,

    credit_days INTEGER DEFAULT 0 CHECK (credit_days >= 0),
    discount_pct DECIMAL(5,2) DEFAULT 0 CHECK (discount_pct >= 0 AND discount_pct <= 100),

    rating DECIMAL(3,2) CHECK (rating >= 0 AND rating <= 5),

    notes TEXT,
    is_active BOOLEAN DEFAULT TRUE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_suppliers_tenant ON parts_management.suppliers(tenant_id);
CREATE INDEX idx_suppliers_name ON parts_management.suppliers(name);

CREATE TRIGGER trg_suppliers_updated_at
    BEFORE UPDATE ON parts_management.suppliers
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

SELECT create_tenant_rls_policies('parts_management', 'suppliers');

-- -------------------------------------------
-- WAREHOUSE_LOCATIONS - Ubicaciones de almacén
-- -------------------------------------------
CREATE TABLE parts_management.warehouse_locations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    code VARCHAR(20) NOT NULL,
    name VARCHAR(100),
    description VARCHAR(200),

    zone VARCHAR(10),
    aisle VARCHAR(10),
    level VARCHAR(10),

    max_weight DECIMAL(10,2) CHECK (max_weight > 0),
    max_volume DECIMAL(10,2) CHECK (max_volume > 0),

    is_active BOOLEAN DEFAULT TRUE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_location_code UNIQUE (tenant_id, code)
);

CREATE INDEX idx_locations_tenant ON parts_management.warehouse_locations(tenant_id);
CREATE INDEX idx_locations_zone ON parts_management.warehouse_locations(zone);

CREATE TRIGGER trg_warehouse_locations_updated_at
    BEFORE UPDATE ON parts_management.warehouse_locations
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

SELECT create_tenant_rls_policies('parts_management', 'warehouse_locations');

-- -------------------------------------------
-- PARTS - Refacciones del taller
-- -------------------------------------------
CREATE TABLE parts_management.parts (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    sku VARCHAR(50) NOT NULL,
    name VARCHAR(300) NOT NULL,
    description TEXT,

    category_id UUID REFERENCES parts_management.part_categories(id),

    brand VARCHAR(100),
    manufacturer VARCHAR(100),

    compatible_engines TEXT[],

    cost DECIMAL(12,2) CHECK (cost >= 0),
    price DECIMAL(12,2) NOT NULL CHECK (price >= 0),

    -- Inventario
    current_stock DECIMAL(10,3) DEFAULT 0 CHECK (current_stock >= 0),
    reserved_stock DECIMAL(10,3) DEFAULT 0 CHECK (reserved_stock >= 0),
    min_stock DECIMAL(10,3) DEFAULT 0 CHECK (min_stock >= 0),
    max_stock DECIMAL(10,3) CHECK (max_stock > 0),
    reorder_point DECIMAL(10,3) CHECK (reorder_point >= 0),

    location_id UUID REFERENCES parts_management.warehouse_locations(id),

    unit VARCHAR(20) DEFAULT 'pza',

    barcode VARCHAR(50),

    preferred_supplier_id UUID REFERENCES parts_management.suppliers(id),

    is_active BOOLEAN DEFAULT TRUE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_part_sku UNIQUE (tenant_id, sku),
    CONSTRAINT chk_min_max_stock CHECK (max_stock IS NULL OR max_stock >= min_stock)
);

CREATE INDEX idx_parts_tenant ON parts_management.parts(tenant_id);
CREATE INDEX idx_parts_sku ON parts_management.parts(sku);
CREATE INDEX idx_parts_barcode ON parts_management.parts(barcode);
CREATE INDEX idx_parts_category ON parts_management.parts(category_id);
CREATE INDEX idx_parts_supplier ON parts_management.parts(preferred_supplier_id);
CREATE INDEX idx_parts_location ON parts_management.parts(location_id);

CREATE TRIGGER trg_parts_updated_at
    BEFORE UPDATE ON parts_management.parts
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

SELECT create_tenant_rls_policies('parts_management', 'parts');

-- -------------------------------------------
-- PART_ALTERNATES - Códigos alternos
-- -------------------------------------------
CREATE TABLE parts_management.part_alternates (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    part_id UUID NOT NULL REFERENCES parts_management.parts(id) ON DELETE CASCADE,

    alternate_code VARCHAR(50) NOT NULL,
    manufacturer VARCHAR(100),

    is_preferred BOOLEAN DEFAULT FALSE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE UNIQUE INDEX idx_alternates_code ON parts_management.part_alternates(alternate_code);
CREATE INDEX idx_alternates_part ON parts_management.part_alternates(part_id);

-- -------------------------------------------
-- PART_LOCATIONS - Multi-ubicación por refacción
-- -------------------------------------------
CREATE TABLE parts_management.part_locations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    part_id UUID NOT NULL REFERENCES parts_management.parts(id) ON DELETE CASCADE,
    location_id UUID NOT NULL REFERENCES parts_management.warehouse_locations(id),

    quantity DECIMAL(10,3) DEFAULT 0 CHECK (quantity >= 0),
    is_primary BOOLEAN DEFAULT FALSE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_part_location UNIQUE (part_id, location_id)
);

CREATE INDEX idx_part_locations_part ON parts_management.part_locations(part_id);
CREATE INDEX idx_part_locations_location ON parts_management.part_locations(location_id);

-- -------------------------------------------
-- INVENTORY_MOVEMENTS - Kardex
-- -------------------------------------------
CREATE TABLE parts_management.inventory_movements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    part_id UUID NOT NULL REFERENCES parts_management.parts(id),

    movement_type VARCHAR(30) NOT NULL
        CHECK (movement_type IN ('purchase', 'consumption', 'adjustment_in', 'adjustment_out', 'return', 'transfer')),

    reference_type VARCHAR(30) CHECK (reference_type IN ('service_order', 'purchase_order', 'adjustment', 'return')),
    reference_id UUID,
    reference_number VARCHAR(50),

    quantity DECIMAL(10,3) NOT NULL,
    previous_stock DECIMAL(10,3) NOT NULL,
    new_stock DECIMAL(10,3) NOT NULL,

    unit_cost DECIMAL(12,2) CHECK (unit_cost >= 0),
    total_cost DECIMAL(12,2) CHECK (total_cost >= 0),

    location_id UUID REFERENCES parts_management.warehouse_locations(id),

    notes TEXT,

    created_by UUID,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_movements_tenant ON parts_management.inventory_movements(tenant_id);
CREATE INDEX idx_movements_part ON parts_management.inventory_movements(part_id);
CREATE INDEX idx_movements_date ON parts_management.inventory_movements(created_at DESC);
CREATE INDEX idx_movements_reference ON parts_management.inventory_movements(reference_type, reference_id);

SELECT create_tenant_rls_policies('parts_management', 'inventory_movements');

-- -------------------------------------------
-- INVENTORY_ADJUSTMENTS - Ajustes de inventario
-- -------------------------------------------
CREATE TABLE parts_management.inventory_adjustments (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    adjustment_number VARCHAR(20) NOT NULL,

    adjustment_type VARCHAR(30) NOT NULL
        CHECK (adjustment_type IN ('count', 'damage', 'expiry', 'correction', 'other')),

    status VARCHAR(20) DEFAULT 'pending'
        CHECK (status IN ('pending', 'approved', 'applied', 'rejected')),

    total_items INTEGER DEFAULT 0,
    total_value DECIMAL(12,2) DEFAULT 0,

    reason TEXT NOT NULL,
    notes TEXT,

    approved_by UUID,
    approved_at TIMESTAMP WITH TIME ZONE,

    created_by UUID,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_adjustment_number UNIQUE (tenant_id, adjustment_number)
);

CREATE INDEX idx_adjustments_tenant ON parts_management.inventory_adjustments(tenant_id);
CREATE INDEX idx_adjustments_status ON parts_management.inventory_adjustments(status);

CREATE TRIGGER trg_adjustments_updated_at
    BEFORE UPDATE ON parts_management.inventory_adjustments
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

SELECT create_tenant_rls_policies('parts_management', 'inventory_adjustments');

-- -------------------------------------------
-- ADJUSTMENT_ITEMS - Ítems del ajuste
-- -------------------------------------------
CREATE TABLE parts_management.adjustment_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    adjustment_id UUID NOT NULL REFERENCES parts_management.inventory_adjustments(id) ON DELETE CASCADE,

    part_id UUID NOT NULL REFERENCES parts_management.parts(id),

    system_qty DECIMAL(10,3) NOT NULL,
    physical_qty DECIMAL(10,3) NOT NULL,
    difference DECIMAL(10,3) NOT NULL,

    unit_cost DECIMAL(12,2) CHECK (unit_cost >= 0),
    value_impact DECIMAL(12,2),

    notes TEXT,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_adjustment_items_adjustment ON parts_management.adjustment_items(adjustment_id);
CREATE INDEX idx_adjustment_items_part ON parts_management.adjustment_items(part_id);

-- -------------------------------------------
-- STOCK_ALERTS - Alertas de stock
-- -------------------------------------------
CREATE TABLE parts_management.stock_alerts (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    part_id UUID NOT NULL REFERENCES parts_management.parts(id),

    alert_type VARCHAR(30) NOT NULL
        CHECK (alert_type IN ('low_stock', 'out_of_stock', 'overstock')),

    current_stock DECIMAL(10,3),
    threshold DECIMAL(10,3),

    status VARCHAR(20) DEFAULT 'active'
        CHECK (status IN ('active', 'acknowledged', 'resolved')),

    acknowledged_by UUID,
    acknowledged_at TIMESTAMP WITH TIME ZONE,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_alerts_tenant ON parts_management.stock_alerts(tenant_id);
CREATE INDEX idx_alerts_status ON parts_management.stock_alerts(status);
CREATE INDEX idx_alerts_part ON parts_management.stock_alerts(part_id);

SELECT create_tenant_rls_policies('parts_management', 'stock_alerts');

-- -------------------------------------------
-- PHYSICAL_INVENTORY - Sesiones de inventario físico
-- -------------------------------------------
CREATE TABLE parts_management.physical_inventory (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,

    inventory_number VARCHAR(20) NOT NULL,

    inventory_type VARCHAR(30) NOT NULL
        CHECK (inventory_type IN ('full', 'zone', 'category', 'cyclic')),

    status VARCHAR(20) DEFAULT 'in_progress'
        CHECK (status IN ('in_progress', 'completed', 'cancelled')),

    zones TEXT[],
    categories UUID[],

    total_items INTEGER DEFAULT 0,
    counted_items INTEGER DEFAULT 0,
    with_difference INTEGER DEFAULT 0,

    started_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    completed_at TIMESTAMP WITH TIME ZONE,

    adjustment_id UUID REFERENCES parts_management.inventory_adjustments(id),

    created_by UUID,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_inventory_number UNIQUE (tenant_id, inventory_number)
);

CREATE INDEX idx_physical_inv_tenant ON parts_management.physical_inventory(tenant_id);
CREATE INDEX idx_physical_inv_status ON parts_management.physical_inventory(status);

SELECT create_tenant_rls_policies('parts_management', 'physical_inventory');

-- -------------------------------------------
-- INVENTORY_COUNTS - Conteos del inventario físico
-- -------------------------------------------
CREATE TABLE parts_management.inventory_counts (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    inventory_id UUID NOT NULL REFERENCES parts_management.physical_inventory(id) ON DELETE CASCADE,

    part_id UUID NOT NULL REFERENCES parts_management.parts(id),
    location_id UUID REFERENCES parts_management.warehouse_locations(id),

    system_qty DECIMAL(10,3) NOT NULL,
    counted_qty DECIMAL(10,3),
    difference DECIMAL(10,3),

    counted_by UUID,
    counted_at TIMESTAMP WITH TIME ZONE,

    notes TEXT,

    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),

    CONSTRAINT uq_count_part_location UNIQUE (inventory_id, part_id, location_id)
);

CREATE INDEX idx_inventory_counts_inventory ON parts_management.inventory_counts(inventory_id);
CREATE INDEX idx_inventory_counts_part ON parts_management.inventory_counts(part_id);