| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "strings" |
| 7 | |
| 8 | tea "charm.land/bubbletea/v2" |
| 9 | "github.com/charmbracelet/x/ansi" |
| 10 | |
| 11 | "reasonix/internal/checkpoint" |
| 12 | "reasonix/internal/control" |
| 13 | "reasonix/internal/i18n" |
| 14 | ) |
| 15 | |
| 16 | // rewindPicker is the in-chat overlay for Esc-Esc / "/rewind". Stage 0 lists the |
| 17 | // session's turns (one checkpoint each); stage 1 picks what to restore for the |
| 18 | // chosen turn; stage 2 explicitly confirms file restore when checkpoint coverage |
| 19 | // is partial. It mirrors the chooser overlay: keys route through handleRewindKey |
| 20 | // and it renders via renderRewind while m.rewind is set. |
| 21 | type rewindPicker struct { |
| 22 | metas []checkpoint.Meta |
| 23 | sel int // selected turn (index into metas) |
| 24 | stage int // 0 = pick turn, 1 = pick scope, 2 = confirm partial coverage |
| 25 | scope int // index into rewindActions (stage 1) |
| 26 | pendingPlan checkpoint.RewindPlan |
| 27 | } |
| 28 | |
| 29 | var rewindActions = []struct { |
| 30 | kind string // "scope" | "fork" | "summ-from" | "summ-upto" |
| 31 | scope control.RewindScope |
| 32 | }{ |
| 33 | {"scope", control.RewindBoth}, |
| 34 | {"scope", control.RewindConversation}, |
| 35 | {"scope", control.RewindCode}, |
| 36 | {"fork", 0}, |
| 37 | {"summ-from", 0}, |
| 38 | {"summ-upto", 0}, |
| 39 | } |
| 40 | |
| 41 | // openRewind populates the picker from the session's checkpoints, selecting the |
| 42 | // most recent turn. A no-op (with a notice) when there is nothing to rewind. |
| 43 | func (m *chatTUI) openRewind() { |
| 44 | metas := m.ctrl.Checkpoints() |
| 45 | if len(metas) == 0 { |
| 46 | m.notice(i18n.M.RewindNone) |
| 47 | return |
| 48 | } |
| 49 | m.rewind = &rewindPicker{metas: metas, sel: len(metas) - 1} |
| 50 | } |
| 51 | |
| 52 | func (m chatTUI) handleRewindKey(msg tea.KeyPressMsg) (tea.Model, tea.Cmd) { |
| 53 | r := m.rewind |
| 54 | switch msg.String() { |
| 55 | case "esc": |
| 56 | switch r.stage { |
| 57 | case 2: |
| 58 | r.stage = 1 |
| 59 | r.pendingPlan = checkpoint.RewindPlan{} |
| 60 | case 1: |
| 61 | r.stage = 0 |
| 62 | default: |
| 63 | m.rewind = nil |
| 64 | } |
| 65 | case "up", "k": |
| 66 | if r.stage == 0 { |
| 67 | if r.sel > 0 { |
| 68 | r.sel-- |
| 69 | } |
| 70 | } else if r.scope > 0 { |
| 71 | r.scope-- |
| 72 | } |
| 73 | case "down", "j": |
| 74 | if r.stage == 0 { |
| 75 | if r.sel < len(r.metas)-1 { |
| 76 | r.sel++ |
| 77 | } |
| 78 | } else if r.scope < len(rewindActions)-1 { |
| 79 | r.scope++ |
| 80 | } |
| 81 | case "enter": |
| 82 | switch r.stage { |
| 83 | case 0: |
| 84 | r.stage = 1 |
| 85 | case 1: |
| 86 | return m.applyRewind() |
| 87 | default: |
| 88 | return m.commitPreparedRewind() |
| 89 | } |
| 90 | case "y": |
| 91 | if r.stage == 2 { |
| 92 | return m.commitPreparedRewind() |
| 93 | } |
| 94 | case "b": |
| 95 | if r.stage == 1 { |
| 96 | r.scope = 0 |
| 97 | return m.applyRewind() |
| 98 | } |
| 99 | case "c": |
| 100 | if r.stage == 1 { |
| 101 | r.scope = 1 |
| 102 | return m.applyRewind() |
| 103 | } |
| 104 | case "d": |
| 105 | if r.stage == 1 { |
| 106 | r.scope = 2 |
| 107 | return m.applyRewind() |
| 108 | } |
| 109 | case "f": |
| 110 | if r.stage == 1 { |
| 111 | r.scope = 3 |
| 112 | return m.applyRewind() |
| 113 | } |
| 114 | case "s": |
| 115 | if r.stage == 1 { |
| 116 | r.scope = 4 |
| 117 | return m.applyRewind() |
| 118 | } |
| 119 | case "u": |
| 120 | if r.stage == 1 { |
| 121 | r.scope = 5 |
| 122 | return m.applyRewind() |
| 123 | } |
| 124 | } |
| 125 | return m, nil |
| 126 | } |
| 127 | |
| 128 | func (m chatTUI) applyRewind() (tea.Model, tea.Cmd) { |
| 129 | r := m.rewind |
| 130 | meta := r.metas[r.sel] |
| 131 | act := rewindActions[r.scope] |
| 132 | // The controller emits notices for operation errors and committed rewinds. |
| 133 | // A prepared-but-disabled plan has no controller error, so this picker reports |
| 134 | // that precheck result itself below. |
| 135 | switch act.kind { |
| 136 | case "fork": |
| 137 | m.rewind = nil |
| 138 | if _, err := m.ctrl.Fork(meta.Turn); err == nil { |
| 139 | m.followSessionLease() |
| 140 | m.replayActiveBranch(fmt.Sprintf("branched from turn %d", meta.Turn+1)) |
| 141 | } |
| 142 | return m, nil // the controller is on the fork now |
| 143 | case "summ-from": |
| 144 | m.rewind = nil |
| 145 | _ = m.ctrl.SummarizeFrom(context.Background(), meta.Turn) |
| 146 | return m, nil |
| 147 | case "summ-upto": |
| 148 | m.rewind = nil |
| 149 | _ = m.ctrl.SummarizeUpTo(context.Background(), meta.Turn) |
| 150 | return m, nil |
| 151 | } |
| 152 | plan, err := m.ctrl.PrepareRewind(meta.Turn, act.scope) |
| 153 | if err != nil { |
| 154 | m.rewind = nil |
| 155 | return m, nil |
| 156 | } |
| 157 | if !rewindPlanCanApply(plan) { |
| 158 | reason := strings.TrimSpace(plan.DisabledReason) |
| 159 | if reason == "" { |
| 160 | reason = "precheck failed" |
| 161 | } |
| 162 | m.notice(fmt.Sprintf(i18n.M.RewindUnavailableFmt, reason)) |
| 163 | m.rewind = nil |
| 164 | return m, nil |
| 165 | } |
| 166 | if control.RewindPlanRequiresConfirmation(plan) { |
| 167 | r.pendingPlan = plan |
| 168 | r.stage = 2 |
| 169 | return m, nil |
| 170 | } |
| 171 | r.pendingPlan = plan |
| 172 | return m.commitPreparedRewind() |
| 173 | } |
| 174 | |
| 175 | func rewindPlanCanApply(plan checkpoint.RewindPlan) bool { |
| 176 | switch plan.Scope { |
| 177 | case checkpoint.RewindCode: |
| 178 | return plan.CanFiles |
| 179 | case checkpoint.RewindConversation: |
| 180 | return plan.CanConversation |
| 181 | case checkpoint.RewindBoth: |
| 182 | return plan.CanFiles && plan.CanConversation |
| 183 | default: |
| 184 | return false |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | func (m chatTUI) commitPreparedRewind() (tea.Model, tea.Cmd) { |
| 189 | r := m.rewind |
| 190 | if r == nil || r.pendingPlan.PlanID == "" { |
| 191 | return m, nil |
| 192 | } |
| 193 | meta := r.metas[r.sel] |
| 194 | scope := control.RewindScope(r.pendingPlan.Scope) |
| 195 | planID := r.pendingPlan.PlanID |
| 196 | m.rewind = nil |
| 197 | result, err := m.ctrl.CommitRewindInPlace(planID) |
| 198 | if err != nil || !result.OK { |
| 199 | return m, nil |
| 200 | } |
| 201 | if result.ConversationForked { |
| 202 | // The controller is already on the rewound conversation: a head of the |
| 203 | // same log, or the fork file of a schema-1 session. Only the lease and |
| 204 | // the transcript view still follow it. |
| 205 | m.followSessionLease() |
| 206 | m.replayActiveBranch(fmt.Sprintf("rewound to turn %d", meta.Turn+1)) |
| 207 | } |
| 208 | // Conversation rewind activates the fork and prefills the selected prompt |
| 209 | // for editing. Code-only rewind keeps the current transcript on screen. |
| 210 | if scope != control.RewindCode && strings.TrimSpace(meta.Prompt) != "" { |
| 211 | m.input.SetValue(meta.Prompt) |
| 212 | m.growInputToFit() |
| 213 | } |
| 214 | return m, nil |
| 215 | } |
| 216 | |
| 217 | func (m chatTUI) renderRewind() string { |
| 218 | r := m.rewind |
| 219 | if r == nil { |
| 220 | return "" |
| 221 | } |
| 222 | w := max(m.width, 10) |
| 223 | var b strings.Builder |
| 224 | if r.stage == 0 { |
| 225 | b.WriteString(accent(i18n.M.RewindPickTitle) + "\n") |
| 226 | // Long sessions list one row per turn; window it like quickPicker so |
| 227 | // the overlay never outgrows the terminal (no scrolling viewport). |
| 228 | start, end := quickPickerWindow(len(r.metas), r.sel) |
| 229 | if start > 0 { |
| 230 | b.WriteString(dim(" ↑ more") + "\n") |
| 231 | } |
| 232 | for i := start; i < end; i++ { |
| 233 | meta := r.metas[i] |
| 234 | b.WriteString(rowLine(i == r.sel, meta.Turn+1, "", turnLabel(meta, w), false) + "\n") |
| 235 | } |
| 236 | if end < len(r.metas) { |
| 237 | b.WriteString(dim(" ↓ more") + "\n") |
| 238 | } |
| 239 | b.WriteString(dim(i18n.M.RewindPickHint)) |
| 240 | return choicePanelStyle.Width(w).Render(b.String()) |
| 241 | } |
| 242 | meta := r.metas[r.sel] |
| 243 | if r.stage == 2 { |
| 244 | b.WriteString(accent(i18n.M.RewindCoverageTitle) + "\n") |
| 245 | b.WriteString(fmt.Sprintf(i18n.M.RewindCoverageWarningFmt, len(r.pendingPlan.CoverageGaps)) + "\n") |
| 246 | b.WriteString(dim(fmt.Sprintf(i18n.M.RewindRestoreTitleFmt, meta.Turn+1)+oneLine(meta.Prompt, 48)) + "\n") |
| 247 | b.WriteString(dim(i18n.M.RewindConfirmHint)) |
| 248 | return choicePanelStyle.Width(w).Render(b.String()) |
| 249 | } |
| 250 | b.WriteString(accent(fmt.Sprintf(i18n.M.RewindRestoreTitleFmt, meta.Turn+1)) + dim(oneLine(meta.Prompt, 48)) + "\n") |
| 251 | for i := range rewindActions { |
| 252 | b.WriteString(rowLine(i == r.scope, i+1, "", rewindActionLabel(i), false) + "\n") |
| 253 | } |
| 254 | b.WriteString(dim(i18n.M.RewindApplyHint)) |
| 255 | return choicePanelStyle.Width(w).Render(b.String()) |
| 256 | } |
| 257 | |
| 258 | func rewindActionLabel(i int) string { |
| 259 | switch i { |
| 260 | case 0: |
| 261 | return i18n.M.RewindCodeConversation |
| 262 | case 1: |
| 263 | return i18n.M.RewindConversationOnly |
| 264 | case 2: |
| 265 | return i18n.M.RewindCodeOnly |
| 266 | case 3: |
| 267 | return i18n.M.RewindFork |
| 268 | case 4: |
| 269 | return i18n.M.RewindSummarizeFrom |
| 270 | case 5: |
| 271 | return i18n.M.RewindSummarizeUpto |
| 272 | default: |
| 273 | return "" |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | func turnLabel(meta checkpoint.Meta, w int) string { |
| 278 | label := oneLine(meta.Prompt, max(20, w-30)) |
| 279 | if n := len(meta.Paths); n > 0 { |
| 280 | s := "" |
| 281 | if n != 1 { |
| 282 | s = "s" |
| 283 | } |
| 284 | label += dim(fmt.Sprintf(" (%d file%s)", n, s)) |
| 285 | } |
| 286 | return label |
| 287 | } |
| 288 | |
| 289 | // oneLine flattens s to a single line and truncates it to display width n. |
| 290 | func oneLine(s string, n int) string { |
| 291 | s = strings.TrimSpace(strings.ReplaceAll(s, "\n", " ")) |
| 292 | if s == "" { |
| 293 | return i18n.M.RewindEmpty |
| 294 | } |
| 295 | return ansi.Truncate(s, n, "…") |
| 296 | } |
| 297 |