-- ============================================================================
-- Proposal/Quote Builder + Time Tracking
-- ============================================================================

-- ── Proposals / Quotes ──────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS proposal_statuses (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name VARCHAR(50) NOT NULL UNIQUE,
    color VARCHAR(7),
    sort_order INT NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

INSERT INTO proposal_statuses (name, color, sort_order) VALUES
  ('Draft', '#6366f1', 1),
  ('Sent', '#eab308', 2),
  ('Viewed', '#22d3ee', 3),
  ('Accepted', '#22c55e', 4),
  ('Declined', '#ef4444', 5),
  ('Expired', '#a1a1aa', 6)
ON CONFLICT (name) DO NOTHING;

CREATE TABLE IF NOT EXISTS proposals (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    lead_id UUID REFERENCES leads(id),
    customer_id UUID REFERENCES customers(id),
    opportunity_id UUID REFERENCES opportunities(id),
    title VARCHAR(255) NOT NULL,
    proposal_number VARCHAR(50) NOT NULL,
    status_id UUID NOT NULL REFERENCES proposal_statuses(id),
    content JSONB,
    subtotal DECIMAL(15,2) NOT NULL DEFAULT 0,
    tax_percent DECIMAL(5,2) DEFAULT 15,
    tax_amount DECIMAL(15,2) DEFAULT 0,
    total_amount DECIMAL(15,2) NOT NULL DEFAULT 0,
    valid_until DATE,
    notes TEXT,
    terms TEXT DEFAULT 'Payment due within 30 days. 50% deposit required to commence work.',
    created_by UUID NOT NULL REFERENCES users(id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    deleted_at TIMESTAMPTZ
);

CREATE UNIQUE INDEX IF NOT EXISTS uq_proposal_number ON proposals(proposal_number) WHERE deleted_at IS NULL;
CREATE INDEX idx_proposals_customer ON proposals(customer_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_proposals_lead ON proposals(lead_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_proposals_status ON proposals(status_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_proposals_created ON proposals(created_at) WHERE deleted_at IS NULL;

CREATE TABLE IF NOT EXISTS proposal_items (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
    product_id UUID REFERENCES products(id),
    description TEXT NOT NULL,
    quantity INT NOT NULL DEFAULT 1 CHECK (quantity > 0),
    unit_price DECIMAL(15,2) NOT NULL CHECK (unit_price >= 0),
    discount_percent DECIMAL(5,2) NOT NULL DEFAULT 0 CHECK (discount_percent >= 0 AND discount_percent <= 100),
    total_price DECIMAL(15,2) NOT NULL CHECK (total_price >= 0),
    sort_order INT NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_proposal_items_proposal ON proposal_items(proposal_id);

CREATE TABLE IF NOT EXISTS proposal_signatures (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    proposal_id UUID NOT NULL REFERENCES proposals(id) ON DELETE CASCADE,
    signatory_name VARCHAR(255) NOT NULL,
    signatory_email VARCHAR(255) NOT NULL,
    signature_data TEXT,
    ip_address INET,
    signed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    is_valid BOOLEAN NOT NULL DEFAULT TRUE
);

CREATE INDEX idx_proposal_signatures_proposal ON proposal_signatures(proposal_id);

-- ── Time Tracking ──────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS time_entries (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id),
    project_id UUID REFERENCES projects(id),
    milestone_id UUID REFERENCES project_milestones(id),
    task_id UUID REFERENCES tasks(id),
    description TEXT,
    date DATE NOT NULL DEFAULT CURRENT_DATE,
    start_time TIMESTAMPTZ,
    end_time TIMESTAMPTZ,
    duration_minutes INT NOT NULL CHECK (duration_minutes > 0),
    billable BOOLEAN NOT NULL DEFAULT TRUE,
    hourly_rate DECIMAL(15,2),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_time_entries_user ON time_entries(user_id);
CREATE INDEX idx_time_entries_project ON time_entries(project_id);
CREATE INDEX idx_time_entries_date ON time_entries(date);
CREATE INDEX idx_time_entries_billable ON time_entries(billable) WHERE billable = TRUE;

-- Seed sample time entry
DO $$
DECLARE
  v_user_id UUID;
  v_project_id UUID;
BEGIN
  SELECT id INTO v_user_id FROM users LIMIT 1;
  SELECT id INTO v_project_id FROM projects LIMIT 1;
  IF v_user_id IS NOT NULL AND v_project_id IS NOT NULL AND NOT EXISTS (SELECT 1 FROM time_entries) THEN
    INSERT INTO time_entries (user_id, project_id, description, date, duration_minutes, billable, hourly_rate)
    VALUES
      (v_user_id, v_project_id, 'Initial planning and requirements gathering', CURRENT_DATE - 2, 240, TRUE, 1500),
      (v_user_id, v_project_id, 'Wireframe design', CURRENT_DATE - 1, 180, TRUE, 1500),
      (v_user_id, v_project_id, 'Team standup and sprint planning', CURRENT_DATE, 60, FALSE, NULL);
  END IF;
END $$;