-- Migration 012: Create financial tables
-- Labor: rate per account address (exactly ONE active per location, non-overlapping dates)
-- Revenue: expected revenue per account (exactly ONE active, non-overlapping dates)
-- Invoice: billing document with Wave integration

-- Labor rate for account address
CREATE TABLE labor (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    account_address_id UUID REFERENCES account_addresses(id) ON DELETE CASCADE,

    amount DECIMAL(10, 2) NOT NULL,

    -- Validity period (non-overlapping per location)
    start_date DATE NOT NULL,
    end_date DATE
);

-- Constraint: non-overlapping labor rates per account address
ALTER TABLE labor ADD CONSTRAINT labor_no_overlap
    EXCLUDE USING gist (
        account_address_id WITH =,
        daterange(start_date, COALESCE(end_date, '9999-12-31'::DATE), '[]') WITH &&
    );

-- Revenue expectation for account
CREATE TABLE revenues (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

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

    amount DECIMAL(10, 2) NOT NULL,

    -- Validity period (non-overlapping per account)
    start_date DATE NOT NULL,
    end_date DATE,

    -- Wave accounting integration
    wave_service_id VARCHAR(255)
);

-- Constraint: non-overlapping revenues per account
ALTER TABLE revenues ADD CONSTRAINT revenues_no_overlap
    EXCLUDE USING gist (
        account_id WITH =,
        daterange(start_date, COALESCE(end_date, '9999-12-31'::DATE), '[]') WITH &&
    );

-- Customer invoice
CREATE TABLE invoices (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    customer_id UUID NOT NULL REFERENCES customers(id) ON DELETE CASCADE,

    date DATE NOT NULL,
    status invoice_status NOT NULL DEFAULT 'DRAFT',
    date_paid DATE,
    payment_type payment_type,

    -- Wave accounting integration
    wave_invoice_id VARCHAR(255)
);

-- M2M: Invoice to projects
CREATE TABLE invoice_projects (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    invoice_id UUID NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,

    UNIQUE (invoice_id, project_id)
);

-- M2M: Invoice to revenues
CREATE TABLE invoice_revenues (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    invoice_id UUID NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    revenue_id UUID NOT NULL REFERENCES revenues(id) ON DELETE CASCADE,

    UNIQUE (invoice_id, revenue_id)
);

-- Indexes
CREATE INDEX idx_labor_address ON labor(account_address_id);
CREATE INDEX idx_revenues_account ON revenues(account_id);
CREATE INDEX idx_invoices_customer ON invoices(customer_id);
CREATE INDEX idx_invoices_date ON invoices(date);
CREATE INDEX idx_invoices_status ON invoices(status);
CREATE INDEX idx_invoice_projects_invoice ON invoice_projects(invoice_id);
CREATE INDEX idx_invoice_revenues_invoice ON invoice_revenues(invoice_id);