-- ═══════════════════════════════════════════════════════════════════════════
-- AAMOS Admin v2 — Fullständigt databasschema
-- CRM, Fakturering, Bokföring, Automation, Övervakning
-- ═══════════════════════════════════════════════════════════════════════════

-- ── Customers (Kunder) ─────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS billing_customers (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  customer_type       TEXT NOT NULL DEFAULT 'company', -- 'company'|'individual'
  org_nr              TEXT,
  name                TEXT NOT NULL,
  email               TEXT,
  phone               TEXT,
  address             TEXT,
  postal_code         TEXT,
  city                TEXT,
  country             TEXT DEFAULT 'SE',
  reference           TEXT,
  notes               TEXT,
  status              TEXT NOT NULL DEFAULT 'active', -- 'active'|'inactive'|'prospect'
  payment_terms_days  INTEGER DEFAULT 30,
  vat_number          TEXT,
  
  -- Landvex Platform integration
  platform_customer_id TEXT,
  platform_synced_at   TIMESTAMPTZ,
  
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_customers_status ON billing_customers (status);
CREATE INDEX IF NOT EXISTS idx_customers_org_nr ON billing_customers (org_nr);

-- ── Leads ──────────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS crm_leads (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name                TEXT NOT NULL,
  email               TEXT,
  phone               TEXT,
  company             TEXT,
  source              TEXT NOT NULL DEFAULT 'web', -- 'web'|'referral'|'cold_call'|'event'|'other'
  status              TEXT NOT NULL DEFAULT 'new', -- 'new'|'contacted'|'qualified'|'converted'|'lost'
  notes               TEXT,
  
  converted_at        TIMESTAMPTZ,
  converted_to_customer_id UUID REFERENCES billing_customers(id),
  
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_leads_status ON crm_leads (status);
CREATE INDEX IF NOT EXISTS idx_leads_source ON crm_leads (source);
CREATE UNIQUE INDEX IF NOT EXISTS idx_leads_email ON crm_leads (email);

-- ── Agreements (Avtal) ─────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS billing_agreements (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  agreement_number    TEXT NOT NULL UNIQUE,
  customer_id         UUID NOT NULL REFERENCES billing_customers(id),
  
  agreement_type      TEXT NOT NULL DEFAULT 'kommersiellt', -- 'kommunalt'|'kommersiellt'|'internt'
  status              TEXT NOT NULL DEFAULT 'draft', -- 'draft'|'active'|'suspended'|'terminated'|'expired'
  
  title               TEXT NOT NULL,
  description         TEXT,
  start_date          DATE NOT NULL,
  end_date            DATE,
  auto_renew          BOOLEAN NOT NULL DEFAULT FALSE,
  renewal_period_months INTEGER,
  
  billing_frequency   TEXT NOT NULL DEFAULT 'monthly', -- 'monthly'|'quarterly'|'semi_annual'|'annual'|'one_time'
  billing_day         INTEGER NOT NULL DEFAULT 1,
  payment_terms_days  INTEGER NOT NULL DEFAULT 30,
  
  amount              NUMERIC(18,2) NOT NULL DEFAULT 0,
  currency            TEXT NOT NULL DEFAULT 'SEK',
  vat_rate            NUMERIC(5,2) NOT NULL DEFAULT 25.0,
  
  next_invoice_date   DATE,
  last_invoice_date   DATE,
  
  -- Landvex Platform
  platform_agreement_id TEXT,
  platform_synced_at    TIMESTAMPTZ,
  
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_agreements_customer ON billing_agreements (customer_id);
CREATE INDEX IF NOT EXISTS idx_agreements_status ON billing_agreements (status);

-- ── Invoices (Fakturor) ────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS billing_invoices (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  invoice_number      TEXT NOT NULL UNIQUE,
  customer_id         UUID NOT NULL REFERENCES billing_customers(id),
  agreement_id        UUID REFERENCES billing_agreements(id),
  
  invoice_type        TEXT NOT NULL DEFAULT 'standard', -- 'standard'|'credit'|'proforma'|'reminder'
  status              TEXT NOT NULL DEFAULT 'draft', -- 'draft'|'sent'|'paid'|'partially_paid'|'overdue'|'cancelled'|'credited'
  
  customer_name       TEXT NOT NULL,
  customer_address    TEXT,
  customer_postal     TEXT,
  customer_city       TEXT,
  customer_email      TEXT,
  customer_reference  TEXT,
  
  invoice_date        DATE NOT NULL,
  due_date            DATE NOT NULL,
  delivery_date       DATE,
  sent_at             TIMESTAMPTZ,
  paid_at             TIMESTAMPTZ,
  credited_at         TIMESTAMPTZ,
  
  currency            TEXT NOT NULL DEFAULT 'SEK',
  subtotal            NUMERIC(18,2) NOT NULL DEFAULT 0,
  vat_total           NUMERIC(18,2) NOT NULL DEFAULT 0,
  total               NUMERIC(18,2) NOT NULL DEFAULT 0,
  amount_paid         NUMERIC(18,2) NOT NULL DEFAULT 0,
  amount_due          NUMERIC(18,2) NOT NULL DEFAULT 0,
  
  vat_specification   JSONB NOT NULL DEFAULT '{}',
  
  -- Ledger integration
  journal_entry_id    UUID,
  ledger_posted_at    TIMESTAMPTZ,
  
  reminder_count      INTEGER NOT NULL DEFAULT 0,
  last_reminder_at    TIMESTAMPTZ,
  reminder_fee        NUMERIC(18,2) DEFAULT 0,
  interest_fee        NUMERIC(18,2) DEFAULT 0,
  
  pdf_generated_at    TIMESTAMPTZ,
  pdf_url             TEXT,
  
  -- Landvex Platform
  platform_invoice_id TEXT,
  platform_synced_at  TIMESTAMPTZ,
  
  notes               TEXT,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_invoices_customer ON billing_invoices (customer_id);
CREATE INDEX IF NOT EXISTS idx_invoices_status ON billing_invoices (status);
CREATE INDEX IF NOT EXISTS idx_invoices_dates ON billing_invoices (invoice_date, due_date);
CREATE INDEX IF NOT EXISTS idx_invoices_overdue ON billing_invoices (status, due_date) WHERE status IN ('sent', 'partially_paid');

-- ── Invoice Lines ──────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS billing_invoice_lines (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  invoice_id          UUID NOT NULL REFERENCES billing_invoices(id) ON DELETE CASCADE,
  line_number         INTEGER NOT NULL,
  description         TEXT NOT NULL,
  quantity            NUMERIC(12,2) NOT NULL DEFAULT 1,
  unit                TEXT,
  unit_price          NUMERIC(18,2) NOT NULL,
  line_total          NUMERIC(18,2) NOT NULL,
  vat_rate            NUMERIC(5,2) NOT NULL,
  vat_amount          NUMERIC(18,2) NOT NULL,
  line_total_incl_vat NUMERIC(18,2) NOT NULL,
  revenue_account     TEXT NOT NULL DEFAULT '3000',
  cost_center         TEXT,
  project_code        TEXT,
  UNIQUE (invoice_id, line_number)
);

-- ── Payments (Inbetalningar) ───────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS billing_payments (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  invoice_id          UUID NOT NULL REFERENCES billing_invoices(id),
  payment_date        DATE NOT NULL,
  amount              NUMERIC(18,2) NOT NULL,
  currency            TEXT NOT NULL DEFAULT 'SEK',
  payment_method      TEXT NOT NULL, -- 'bank_transfer'|'swish'|'card'|'cash'|'autogiro'|'other'
  payment_reference   TEXT,
  bank_transaction_id TEXT,
  reconciliation_status TEXT NOT NULL DEFAULT 'unreconciled', -- 'unreconciled'|'matched'|'reconciled'
  reconciled_at       TIMESTAMPTZ,
  journal_entry_id    UUID,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_payments_invoice ON billing_payments (invoice_id);
CREATE INDEX IF NOT EXISTS idx_payments_reconciliation ON billing_payments (reconciliation_status);

-- ── Automations ────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS automations (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name                TEXT NOT NULL,
  description         TEXT,
  trigger_type        TEXT NOT NULL, -- 'scheduled'|'event'|'manual'
  frequency           TEXT, -- 'daily'|'weekly'|'monthly'|'quarterly'
  action              TEXT NOT NULL, -- 'create_invoice'|'send_reminder'|'export_report'|'backup'
  action_config       JSONB NOT NULL DEFAULT '{}',
  is_active           BOOLEAN NOT NULL DEFAULT TRUE,
  last_run_at         TIMESTAMPTZ,
  last_run_status     TEXT,
  last_run_result     JSONB,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- ── Automation Logs ────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS automation_logs (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  automation_id       UUID NOT NULL REFERENCES automations(id),
  status              TEXT NOT NULL, -- 'success'|'failed'|'running'
  result              JSONB,
  executed_at         TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- ── Settings ───────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS settings (
  id                  INTEGER PRIMARY KEY DEFAULT 1,
  company_name        TEXT NOT NULL DEFAULT 'LandveX AB',
  org_nr              TEXT DEFAULT '559141-7042',
  vat_nr              TEXT DEFAULT 'SE559141704201',
  address             TEXT,
  postal_code         TEXT,
  city                TEXT,
  payment_terms_days  INTEGER DEFAULT 30,
  default_vat_rate    NUMERIC(5,2) DEFAULT 25.0,
  bank_account        TEXT,
  bankgiro            TEXT,
  postgiro            TEXT,
  swish_number        TEXT,
  logo_url            TEXT,
  email_from          TEXT,
  email_reply_to      TEXT,
  updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

INSERT INTO settings (id) VALUES (1) ON CONFLICT (id) DO NOTHING;

-- ── Bank Transactions (for reconciliation) ─────────────────────────────────
CREATE TABLE IF NOT EXISTS bank_transactions (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  transaction_date    DATE NOT NULL,
  description         TEXT,
  amount              NUMERIC(18,2) NOT NULL,
  currency            TEXT NOT NULL DEFAULT 'SEK',
  reference           TEXT,
  bank_account        TEXT,
  matched_at          TIMESTAMPTZ,
  matched_by          TEXT,
  reconciled_at       TIMESTAMPTZ,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- ── Mail Messages ──────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS mail_messages (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  from_email          TEXT NOT NULL,
  from_name           TEXT,
  to_email            TEXT,
  subject             TEXT,
  body                TEXT,
  folder              TEXT NOT NULL DEFAULT 'inbox', -- 'inbox'|'sent'|'archive'|'trash'
  status              TEXT NOT NULL DEFAULT 'unread', -- 'unread'|'read'|'replied'|'archived'
  source              TEXT, -- 'quixzoom_waitlist'|'landvex_contact'|'aamos_contact'|'manual'|'manual_reply'
  source_url          TEXT,
  lead_id             UUID REFERENCES crm_leads(id),
  in_reply_to         UUID REFERENCES mail_messages(id),
  read_at             TIMESTAMPTZ,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_mail_folder ON mail_messages (folder);
CREATE INDEX IF NOT EXISTS idx_mail_status ON mail_messages (status);
CREATE INDEX IF NOT EXISTS idx_mail_source ON mail_messages (source);
CREATE INDEX IF NOT EXISTS idx_mail_lead ON mail_messages (lead_id);
CREATE INDEX IF NOT EXISTS idx_mail_created ON mail_messages (created_at DESC);

-- ── Audit Log ──────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS audit_log (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id             TEXT,
  entity_type         TEXT NOT NULL, -- 'customer'|'invoice'|'payment'|'agreement'|'automation'
  entity_id           TEXT NOT NULL,
  action              TEXT NOT NULL, -- 'created'|'updated'|'deleted'|'sent'|'paid'
  before_state        JSONB,
  after_state         JSONB,
  ip_address          TEXT,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- ── Landvex Platform Sync Queue ────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS platform_sync_queue (
  id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  entity_type         TEXT NOT NULL, -- 'customer'|'agreement'|'invoice'
  entity_id           UUID NOT NULL,
  action              TEXT NOT NULL, -- 'create'|'update'|'delete'
  status              TEXT NOT NULL DEFAULT 'pending', -- 'pending'|'processing'|'completed'|'failed'
  error_message       TEXT,
  retry_count         INTEGER DEFAULT 0,
  created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  processed_at        TIMESTAMPTZ
);