;;~ title    "Sale-effectiveness postmortem"
;;~ author   "lacuna"
;;~ version  1
;;~ mode     automation
;;~ flavor   light-purple
;;~ id       sale-effectiveness-postmortem
;;~ trigger  event:sale-ended
;;~ touches  ()
;;~ summary  "After a sale ends, write the postmortem: lift, conversion change, fee impact, what to repeat."

;; Fires when a sale ends. Pulls the receipts for the sale window +
;; the pre-sale baseline window of the same length. Sonnet writes the
;; postmortem narrative: what worked, what didn't, what to keep.

(cart 'sale-effectiveness-postmortem
  '((author    . "lacuna")
    (version   . 1)
    (read-only . #t)))

(define (start ctx)
  (let ((sale-id (ctx-get 'sale-id ctx)))
    (if (null? sale-id)
        (escalate 'missing-sale-id null)
        (next 'fetch ctx))))

(define (fetch ctx)
  (let ((sale-id (ctx-get 'sale-id ctx)))
    (act 'etsy/receipts (list 'sale-window sale-id) 'check-fetch)))

(define (check-fetch ctx)
  (let ((r (ctx-result ctx)))
    (cond
      ((null? r)                       (escalate 'no-data null))
      ((eq? r 'rate-limited)           (after 30 'fetch ctx))
      (else                            (next 'reason (ctx-set 'receipts r ctx))))))

(define (reason ctx)
  (let ((receipts (ctx-get 'receipts ctx)))
    (act 'sakura/cloud-reason
         (list 'task 'sale-postmortem receipts)
         'check-reason)))

(define (check-reason ctx)
  (let ((r (ctx-result ctx)))
    (cond
      ((null? r)                       (escalate 'cloud-empty null))
      ((not (string? r))               (escalate 'cloud-garbled null))
      ((eq? r 'cloud-quota-exhausted)  (escalate 'cloud-quota null))
      ((eq? r 'cloud-consent-required) (escalate 'cloud-consent null))
      (else                            (next 'announce (ctx-set 'postmortem r ctx))))))

(define (announce ctx) (done))