package growthreport

import (
	"encoding/json"
	"fmt"
	"time"
)

type Status string

const (
	StatusQueued     Status = "QUEUED"
	StatusAnalyzing  Status = "ANALYZING"
	StatusGenerating Status = "GENERATING"
	StatusReady      Status = "READY"
	StatusPartial    Status = "PARTIAL"
	StatusFailed     Status = "FAILED"
)

func (s Status) Terminal() bool { return s == StatusReady || s == StatusPartial || s == StatusFailed }

type Scope struct {
	TerminalID *string `json:"terminalId"`
}

type CampaignBrief struct {
	Headline          string   `json:"headline"`
	Interpretation    string   `json:"interpretation"`
	OfferSuggestion   string   `json:"offerSuggestion"`
	MessageSuggestion string   `json:"messageSuggestion"`
	PreparationAction string   `json:"preparationAction"`
	Limitation        string   `json:"limitation"`
	EvidenceIDs       []string `json:"evidenceIds"`
}

type AICopy struct {
	Briefs []CampaignBrief `json:"briefs"`
}

type Usage struct {
	InputTokens       int64  `json:"inputTokens"`
	OutputTokens      int64  `json:"outputTokens"`
	LatencyMS         int64  `json:"latencyMs"`
	ProviderRequests  int64  `json:"providerRequests"`
	ReservedTokens    int64  `json:"reservedTokens"`
	ProviderRequestID string `json:"providerRequestId,omitempty"`
	EstimatedCost     string `json:"estimatedCost,omitempty"`
}

type Report struct {
	ReportID              string          `json:"reportId"`
	Revision              int             `json:"revision"`
	Status                Status          `json:"status"`
	Scope                 Scope           `json:"scope"`
	HorizonDays           int             `json:"horizonDays"`
	ForecastStartDate     *time.Time      `json:"forecastStartDate,omitempty"`
	DeterministicEvidence json.RawMessage `json:"deterministicEvidence,omitempty"`
	AICopy                *AICopy         `json:"aiCopy,omitempty"`
	FailureCode           *string         `json:"failureCode,omitempty"`
	Cached                bool            `json:"cached"`
	Stale                 bool            `json:"stale"`
	NextRefreshAt         time.Time       `json:"nextRefreshAt"`
	CreatedAt             time.Time       `json:"createdAt"`
	UpdatedAt             time.Time       `json:"updatedAt"`
	EventsURL             string          `json:"eventsUrl"`
}

type Record struct {
	Report
	MerchantID       int64
	TerminalDBID     *int64
	Fingerprint      string
	DatasetWatermark string
	CatalogVersion   string
	AnalyticsVersion string
	PromptVersion    string
	SchemaVersion    string
	Model            string
	Usage            Usage
	ManualRefresh    bool
	TehranRefreshDay *time.Time
	ClaimToken       string
}

type CreateRequest struct {
	TerminalID string `json:"terminalId"`
	Refresh    bool   `json:"refresh"`
}

type RefreshLimitError struct{ NextRefreshAt time.Time }

func (e *RefreshLimitError) Error() string {
	return fmt.Sprintf("%s: next refresh at %s", ErrRefreshLimited, e.NextRefreshAt.Format(time.RFC3339))
}
func (e *RefreshLimitError) Unwrap() error { return ErrRefreshLimited }