-- 004_admin_queue.sql
-- Admin users, order queue management, and audit log.

BEGIN;

-- Admin users (password stored as bcrypt hash)
CREATE TABLE IF NOT EXISTS admin_users (
    id              SERIAL PRIMARY KEY,
    username        TEXT NOT NULL UNIQUE,
    password_hash   TEXT NOT NULL,
    display_name    TEXT,
    email           TEXT,
    active          BOOLEAN DEFAULT TRUE,
    last_login_at   TIMESTAMPTZ,
    created_at      TIMESTAMPTZ DEFAULT now()
);

-- Order audit log — tracks every state change and admin action
CREATE TABLE IF NOT EXISTS order_audit_log (
    id              SERIAL PRIMARY KEY,
    -- Which order (supports both formation_orders and general orders)
    order_type      TEXT NOT NULL CHECK (order_type IN ('formation', 'service', 'quote')),
    order_id        INTEGER NOT NULL,
    order_number    TEXT,
    -- What happened
    action          TEXT NOT NULL,   -- 'status_change', 'note_added', 'manual_filing', 'document_uploaded', 'assigned', 'escalated', 'refunded'
    from_status     TEXT,
    to_status       TEXT,
    -- Who did it
    actor_type      TEXT NOT NULL CHECK (actor_type IN ('system', 'admin', 'worker', 'customer')),
    actor_id        INTEGER,         -- admin_users.id if actor_type = 'admin'
    actor_name      TEXT,
    -- Details
    note            TEXT,
    metadata        JSONB,           -- flexible: file paths, error details, automation output, etc.
    -- Timestamp
    created_at      TIMESTAMPTZ DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_audit_order ON order_audit_log(order_type, order_id);
CREATE INDEX IF NOT EXISTS idx_audit_action ON order_audit_log(action);
CREATE INDEX IF NOT EXISTS idx_audit_created ON order_audit_log(created_at DESC);

-- Add queue management columns to formation_orders
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS assigned_to INTEGER REFERENCES admin_users(id);
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS priority TEXT DEFAULT 'normal' CHECK (priority IN ('low', 'normal', 'high', 'urgent'));
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS automation_status TEXT DEFAULT 'pending' CHECK (automation_status IN ('pending', 'running', 'succeeded', 'failed', 'manual'));
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS automation_error TEXT;
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS automation_attempts INTEGER DEFAULT 0;
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS admin_notes TEXT;
ALTER TABLE formation_orders ADD COLUMN IF NOT EXISTS last_activity_at TIMESTAMPTZ DEFAULT now();

CREATE INDEX IF NOT EXISTS idx_formation_automation ON formation_orders(automation_status);
CREATE INDEX IF NOT EXISTS idx_formation_assigned ON formation_orders(assigned_to);
CREATE INDEX IF NOT EXISTS idx_formation_priority ON formation_orders(priority);

-- Add similar columns to general orders table
ALTER TABLE orders ADD COLUMN IF NOT EXISTS assigned_to INTEGER REFERENCES admin_users(id);
ALTER TABLE orders ADD COLUMN IF NOT EXISTS priority TEXT DEFAULT 'normal';
ALTER TABLE orders ADD COLUMN IF NOT EXISTS admin_notes TEXT;

COMMIT;