| 1 | package config |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "strings" |
| 6 | |
| 7 | "reasonix/internal/billing" |
| 8 | "reasonix/internal/provider" |
| 9 | ) |
| 10 | |
| 11 | // BillingConfig controls host-side cost display. It never changes provider |
| 12 | // list-price tables (those use ProviderEntry.BillingCurrency). |
| 13 | type BillingConfig struct { |
| 14 | // DisplayCurrency is auto|CNY|USD. Empty equals auto. |
| 15 | DisplayCurrency string `toml:"display_currency"` |
| 16 | } |
| 17 | |
| 18 | // DisplayCurrencyPref returns the user preference: "" (auto), "CNY", or "USD". |
| 19 | func (c *Config) DisplayCurrencyPref() string { |
| 20 | if c == nil { |
| 21 | return "" |
| 22 | } |
| 23 | if v := normalizeDisplayCurrency(c.Billing.DisplayCurrency); v != "" { |
| 24 | return v |
| 25 | } |
| 26 | // Legacy [desktop].currency continues to work until rewritten. |
| 27 | return c.DesktopCurrency() |
| 28 | } |
| 29 | |
| 30 | // ExplicitDisplayCurrency returns only a user-pinned display currency. Empty |
| 31 | // is intentional: auto is resolved by a quote/wallet presentation surface. |
| 32 | func (c *Config) ExplicitDisplayCurrency() string { |
| 33 | return c.DisplayCurrencyPref() |
| 34 | } |
| 35 | |
| 36 | // ResolveDisplayCurrency is retained for callers that need a compatibility |
| 37 | // name. Auto is no longer resolved from language, host region, or browser |
| 38 | // locale; it remains empty until a surface supplies a wallet hint. |
| 39 | func (c *Config) ResolveDisplayCurrency() string { |
| 40 | return c.ExplicitDisplayCurrency() |
| 41 | } |
| 42 | |
| 43 | func normalizeDisplayCurrency(currency string) string { |
| 44 | switch strings.ToUpper(strings.TrimSpace(currency)) { |
| 45 | case "", "AUTO": |
| 46 | return "" |
| 47 | case "CNY", "RMB", "CNH": |
| 48 | return "CNY" |
| 49 | case "USD": |
| 50 | return "USD" |
| 51 | default: |
| 52 | return "" |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // SetDisplayCurrency pins the global display currency preference. It does not |
| 57 | // rewrite provider billing currencies or official price tables. |
| 58 | func (c *Config) SetDisplayCurrency(currency string) error { |
| 59 | if c == nil { |
| 60 | return fmt.Errorf("nil config") |
| 61 | } |
| 62 | switch strings.ToUpper(strings.TrimSpace(currency)) { |
| 63 | case "", "AUTO": |
| 64 | c.Billing.DisplayCurrency = "" |
| 65 | c.Desktop.Currency = "" // keep legacy field in sync for older readers |
| 66 | case "CNY", "RMB", "CNH": |
| 67 | c.Billing.DisplayCurrency = "CNY" |
| 68 | c.Desktop.Currency = "CNY" |
| 69 | case "USD": |
| 70 | c.Billing.DisplayCurrency = "USD" |
| 71 | c.Desktop.Currency = "USD" |
| 72 | default: |
| 73 | return fmt.Errorf("display currency %q: must be auto|CNY|USD", currency) |
| 74 | } |
| 75 | return nil |
| 76 | } |
| 77 | |
| 78 | // SetDesktopCurrency is retained for call-site compatibility. It now only |
| 79 | // changes the display currency preference and never rewrites official prices. |
| 80 | func (c *Config) SetDesktopCurrency(currency string) error { |
| 81 | return c.SetDisplayCurrency(currency) |
| 82 | } |
| 83 | |
| 84 | // ProviderBillingCurrency returns the frozen list-price currency for a provider. |
| 85 | func (e *ProviderEntry) ProviderBillingCurrency() string { |
| 86 | if e == nil { |
| 87 | return "" |
| 88 | } |
| 89 | if v := billing.NormalizeCurrency(e.BillingCurrency); v != "" { |
| 90 | return v |
| 91 | } |
| 92 | // Infer from configured prices when field is absent (pre-migration). |
| 93 | if e.Price != nil { |
| 94 | if v := billing.NormalizeCurrency(e.Price.Currency); v != "" { |
| 95 | return v |
| 96 | } |
| 97 | } |
| 98 | for _, p := range e.Prices { |
| 99 | if p == nil { |
| 100 | continue |
| 101 | } |
| 102 | if v := billing.NormalizeCurrency(p.Currency); v != "" { |
| 103 | return v |
| 104 | } |
| 105 | } |
| 106 | return "" |
| 107 | } |
| 108 | |
| 109 | // ProviderBillingMode returns payg or subscription_equivalent. |
| 110 | func (e *ProviderEntry) ProviderBillingMode() string { |
| 111 | if e == nil { |
| 112 | return billing.BillingModePAYG |
| 113 | } |
| 114 | switch strings.ToLower(strings.TrimSpace(e.BillingMode)) { |
| 115 | case billing.BillingModeSubscriptionEquivalent, "subscription", "token_plan": |
| 116 | return billing.BillingModeSubscriptionEquivalent |
| 117 | default: |
| 118 | return billing.BillingModePAYG |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | // RateCardForModel builds a billing.RateCard for the active model price. |
| 123 | func (e *ProviderEntry) RateCardForModel(model string) billing.RateCard { |
| 124 | p := e.PriceForModel(model) |
| 125 | if p == nil { |
| 126 | return billing.RateCard{Currency: e.ProviderBillingCurrency()} |
| 127 | } |
| 128 | cur := billing.NormalizeCurrency(p.Currency) |
| 129 | if cur == "" { |
| 130 | cur = e.ProviderBillingCurrency() |
| 131 | } |
| 132 | return billing.RateCard{ |
| 133 | CacheHit: p.CacheHit, |
| 134 | Input: p.Input, |
| 135 | Output: p.Output, |
| 136 | Currency: cur, |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | // PricingContextForModel returns host-trusted catalog metadata for quote |
| 141 | // construction. Dynamic schedules are enabled only for an exact official |
| 142 | // endpoint whose configured rates still match the current peak anchor. |
| 143 | func (e *ProviderEntry) PricingContextForModel(model string) billing.PricingContext { |
| 144 | if e == nil { |
| 145 | return billing.PricingContext{} |
| 146 | } |
| 147 | model = strings.TrimSpace(model) |
| 148 | kind := officialProviderKind(e) |
| 149 | protocolKind := strings.ToLower(strings.TrimSpace(e.Kind)) |
| 150 | scheduledProtocol := protocolKind == "openai" || protocolKind == "responses" || protocolKind == "anthropic" |
| 151 | ctx := billing.PricingContext{ |
| 152 | ProviderKind: kind, |
| 153 | ModelID: model, |
| 154 | BillingMode: e.ProviderBillingMode(), |
| 155 | } |
| 156 | card := e.RateCardForModel(model) |
| 157 | if entry, ok := billing.MatchesCatalog(kind, model, card); ok { |
| 158 | ctx.CatalogSource = entry.DocURL |
| 159 | } |
| 160 | if kind == "deepseek" && scheduledProtocol && isOfficialDeepSeekBillingEndpoint(e) && ctx.BillingMode == billing.BillingModePAYG { |
| 161 | // An anchor from an earlier price generation still proves an unedited |
| 162 | // official row, so binding the live schedule keeps such a config quoted at |
| 163 | // today's rate instead of the one it was saved with. |
| 164 | if billing.MatchesOfficialPeakAnchor(kind, model, card.Currency, ctx.BillingMode, card) { |
| 165 | ctx.ScheduleID = billing.DeepSeekScheduledIDs()[0] |
| 166 | ctx.CatalogSource = billing.DocDeepSeekPricing |
| 167 | } |
| 168 | } |
| 169 | return ctx |
| 170 | } |
| 171 | |
| 172 | // isOfficialDeepSeekBillingEndpoint is deliberately protocol- and path-aware. |
| 173 | // Hostname-only matching would let a custom route on api.deepseek.com opt into |
| 174 | // vendor pricing and migrations that it may not actually use. |
| 175 | func isOfficialDeepSeekBillingEndpoint(e *ProviderEntry) bool { |
| 176 | if e == nil { |
| 177 | return false |
| 178 | } |
| 179 | switch strings.ToLower(strings.TrimSpace(e.Kind)) { |
| 180 | case "openai": |
| 181 | return isOfficialDeepSeekOpenAIEndpoint(e.BaseURL) |
| 182 | case "responses", "anthropic": |
| 183 | return IsOfficialDeepSeekWebSearchEndpoint(e) |
| 184 | default: |
| 185 | return false |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | // freezeProviderBillingCurrencies sets BillingCurrency from current official |
| 190 | // prices when missing. Custom prices keep their currency. Never overwrites an |
| 191 | // explicit BillingCurrency. |
| 192 | func freezeProviderBillingCurrencies(c *Config) { |
| 193 | if c == nil { |
| 194 | return |
| 195 | } |
| 196 | for i := range c.Providers { |
| 197 | p := &c.Providers[i] |
| 198 | if strings.TrimSpace(p.BillingCurrency) != "" { |
| 199 | p.BillingCurrency = billing.NormalizeCurrency(p.BillingCurrency) |
| 200 | continue |
| 201 | } |
| 202 | if cur := p.ProviderBillingCurrency(); cur != "" { |
| 203 | p.BillingCurrency = cur |
| 204 | } else if officialProviderKind(p) == "deepseek" { |
| 205 | // New default templates use USD official table historically. |
| 206 | p.BillingCurrency = "USD" |
| 207 | } |
| 208 | if strings.TrimSpace(p.BillingMode) == "" { |
| 209 | if isMiMoTokenPlanProvider(p) { |
| 210 | p.BillingMode = billing.BillingModeSubscriptionEquivalent |
| 211 | } else { |
| 212 | p.BillingMode = billing.BillingModePAYG |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | func isMiMoTokenPlanProvider(p *ProviderEntry) bool { |
| 219 | if p == nil { |
| 220 | return false |
| 221 | } |
| 222 | name := strings.ToLower(strings.TrimSpace(p.Name)) |
| 223 | preset := strings.ToLower(strings.TrimSpace(p.PresetID)) |
| 224 | return strings.Contains(name, "token-plan") || strings.Contains(preset, "token-plan") |
| 225 | } |
| 226 | |
| 227 | // migrateBillingDisplayCurrency copies legacy desktop.currency into billing. |
| 228 | func migrateBillingDisplayCurrency(c *Config) { |
| 229 | if c == nil { |
| 230 | return |
| 231 | } |
| 232 | if strings.TrimSpace(c.Billing.DisplayCurrency) != "" { |
| 233 | c.Billing.DisplayCurrency = normalizeDisplayCurrency(c.Billing.DisplayCurrency) |
| 234 | return |
| 235 | } |
| 236 | if cur := c.DesktopCurrency(); cur != "" { |
| 237 | c.Billing.DisplayCurrency = cur |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | // DeepSeekOfficialPricingCurrency resolves which official DeepSeek table to |
| 242 | // use for *new default template fills*. It no longer follows display currency |
| 243 | // for existing providers — those use BillingCurrency. For templates without a |
| 244 | // frozen currency, prefer the first provider's billing currency, else USD. |
| 245 | func (c *Config) DeepSeekOfficialPricingCurrency() string { |
| 246 | if c != nil { |
| 247 | for i := range c.Providers { |
| 248 | p := &c.Providers[i] |
| 249 | if officialProviderKind(p) != "deepseek" { |
| 250 | continue |
| 251 | } |
| 252 | if cur := p.ProviderBillingCurrency(); cur != "" { |
| 253 | return cur |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | return "USD" |
| 258 | } |
| 259 | |
| 260 | // QuoteForUsage builds a CostQuote from a provider price and usage tokens. |
| 261 | func QuoteForUsage(price *provider.Pricing, usage *provider.Usage, display string, modelRef, usageSource, billingMode, catalogSource string) billing.CostQuote { |
| 262 | if price == nil || usage == nil { |
| 263 | return billing.CostQuote{Estimated: true, CostComplete: false, DisplayComplete: false, Complete: false, DisplayStatus: billing.DisplayStatusUnavailable, IncompleteReason: "missing_price_or_usage"} |
| 264 | } |
| 265 | card := billing.RateCard{ |
| 266 | CacheHit: price.CacheHit, |
| 267 | Input: price.Input, |
| 268 | Output: price.Output, |
| 269 | Currency: billing.NormalizeCurrency(price.Currency), |
| 270 | } |
| 271 | if card.Currency == "" { |
| 272 | card.Currency = "CNY" |
| 273 | } |
| 274 | return billing.BuildQuote(billing.QuoteInput{ |
| 275 | Usage: billing.UsageTokens{ |
| 276 | PromptTokens: usage.PromptTokens, |
| 277 | CompletionTokens: usage.CompletionTokens, |
| 278 | CacheHitTokens: usage.CacheHitTokens, |
| 279 | CacheMissTokens: usage.CacheMissTokens, |
| 280 | CacheWriteTokens: usage.CacheWriteTokens, |
| 281 | CacheWriteBilledTokens: usage.CacheWriteBilledTokens, |
| 282 | Estimated: usage.Estimated, |
| 283 | }, |
| 284 | Rates: card, |
| 285 | DisplayCurrency: display, |
| 286 | BillingMode: billingMode, |
| 287 | ModelRef: modelRef, |
| 288 | UsageSource: usageSource, |
| 289 | CatalogSource: catalogSource, |
| 290 | }) |
| 291 | } |
| 292 |