-- Migration 006: Create service scope tables
-- ServiceScope: assigned at AccountAddress level (exactly ONE active per location)
-- Structure: ServiceScope → ServiceScopeArea → ServiceScopeTask

-- Service scope assigned to an account address (location)
CREATE TABLE service_scopes (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    name VARCHAR(255) NOT NULL,
    description TEXT,

    account_id UUID NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
    account_address_id UUID NOT NULL REFERENCES account_addresses(id) ON DELETE CASCADE,

    is_active BOOLEAN NOT NULL DEFAULT TRUE
);

-- Constraint: exactly ONE active service scope per account address
CREATE UNIQUE INDEX idx_service_scope_active
    ON service_scopes (account_address_id) WHERE is_active = TRUE;

-- Area within a service scope
CREATE TABLE service_scope_areas (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    scope_id UUID NOT NULL REFERENCES service_scopes(id) ON DELETE CASCADE,

    name VARCHAR(100) NOT NULL,
    "order" INTEGER NOT NULL CHECK ("order" >= 0)
);

-- Task within a service scope area
CREATE TABLE service_scope_tasks (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    area_id UUID NOT NULL REFERENCES service_scope_areas(id) ON DELETE CASCADE,

    -- Three descriptions for different audiences
    scope_description TEXT NOT NULL,         -- Customer-facing
    checklist_description TEXT NOT NULL,     -- QA/punchlist format
    session_description TEXT NOT NULL,       -- Team member work instructions

    frequency task_frequency NOT NULL DEFAULT 'DAILY',
    "order" INTEGER NOT NULL CHECK ("order" >= 0),
    estimated_minutes INTEGER CHECK (estimated_minutes >= 0)
);

-- Indexes
CREATE INDEX idx_service_scopes_account ON service_scopes(account_id);
CREATE INDEX idx_service_scopes_address ON service_scopes(account_address_id);
CREATE INDEX idx_service_scope_areas_scope ON service_scope_areas(scope_id);
CREATE INDEX idx_service_scope_tasks_area ON service_scope_tasks(area_id);