1 files changed, 152 insertions, 0 deletions
diff --git a/src/stores/useTabsStore.ts b/src/stores/useTabsStore.ts
new file mode 100644
index 0000000..eb9a03a
--- /dev/null
+++ b/src/stores/useTabsStore.ts
@@ -0,0 +1,152 @@
+import { create } from 'zustand'
+import type { Tab } from '@/types'
+import { readFile, writeFile, saveDialog, pickFile } from '@/lib/tauri'
+import { detectLanguage } from '@/lib/languageMap'
+
+interface TabsState {
+  tabs: Tab[]
+  activeTabId: string | null
+  cursorLine: number
+  cursorCol: number
+  savingId: string | null
+  statusMessage: string | null
+  untitledCounter: number
+
+  openFile: (path: string) => Promise<void>
+  pickAndOpenFile: () => Promise<void>
+  createUntitledFile: () => void
+  closeTab: (id: string) => void
+  setActiveTab: (id: string) => void
+  updateContent: (id: string, content: string) => void
+  saveFile: (id: string) => Promise<void>
+  setCursorPosition: (line: number, col: number) => void
+  clearStatusMessage: () => void
+}
+
+function isUntitled(id: string) {
+  return id.startsWith('untitled://')
+}
+
+export const useTabsStore = create<TabsState>((set, get) => ({
+  tabs: [],
+  activeTabId: null,
+  cursorLine: 1,
+  cursorCol: 1,
+  savingId: null,
+  statusMessage: null,
+  untitledCounter: 0,
+
+  openFile: async (path: string) => {
+    const { tabs } = get()
+    const existing = tabs.find((t) => t.path === path)
+    if (existing) {
+      set({ activeTabId: existing.id })
+      return
+    }
+
+    try {
+      const content = await readFile(path)
+      const name = path.split(/[\\/]/).pop() ?? 'untitled'
+      const id = path
+      const tab: Tab = {
+        id,
+        path,
+        name,
+        language: detectLanguage(name),
+        content,
+        modified: false,
+      }
+      set({ tabs: [...tabs, tab], activeTabId: id })
+    } catch (err) {
+      console.error('Failed to open file:', err)
+    }
+  },
+
+  pickAndOpenFile: async () => {
+    const path = await pickFile()
+    if (path) get().openFile(path)
+  },
+
+  createUntitledFile: () => {
+    const { tabs, untitledCounter } = get()
+    const n = untitledCounter + 1
+    const name = `Untitled-${n}`
+    const id = `untitled://${n}`
+    const tab: Tab = {
+      id,
+      path: id,
+      name,
+      language: 'plaintext',
+      content: '',
+      modified: false,
+    }
+    set({ tabs: [...tabs, tab], activeTabId: id, untitledCounter: n })
+  },
+
+  closeTab: (id: string) => {
+    const { tabs, activeTabId } = get()
+    const newTabs = tabs.filter((t) => t.id !== id)
+    let newActive = activeTabId
+    if (activeTabId === id) {
+      const idx = tabs.findIndex((t) => t.id === id)
+      newActive = newTabs[Math.min(idx, newTabs.length - 1)]?.id ?? null
+    }
+    set({ tabs: newTabs, activeTabId: newActive })
+  },
+
+  setActiveTab: (id: string) => {
+    set({ activeTabId: id })
+  },
+
+  updateContent: (id: string, content: string) => {
+    set((state) => ({
+      tabs: state.tabs.map((t) =>
+        t.id === id ? { ...t, content, modified: true } : t
+      ),
+    }))
+  },
+
+  saveFile: async (id: string) => {
+    const { tabs } = get()
+    const tab = tabs.find((t) => t.id === id)
+    if (!tab) return
+
+    set({ savingId: id, statusMessage: null })
+
+    try {
+      let targetPath = tab.path
+
+      if (isUntitled(targetPath)) {
+        const picked = await saveDialog(tab.name)
+        if (!picked) {
+          set({ savingId: null })
+          return
+        }
+        targetPath = picked
+      }
+
+      await writeFile(targetPath, tab.content)
+      const name = targetPath.split(/[\\/]/).pop() ?? tab.name
+      set({
+        tabs: tabs.map((t) =>
+          t.id === id
+            ? { ...t, path: targetPath, name, language: detectLanguage(name), modified: false }
+            : t
+        ),
+        savingId: null,
+        statusMessage: 'Saved',
+      })
+    } catch (err) {
+      set({ savingId: null, statusMessage: 'Save failed' })
+      console.error('Failed to save file:', err)
+    }
+  },
+
+  setCursorPosition: (line: number, col: number) => {
+    set({ cursorLine: line, cursorCol: col })
+  },
+
+  clearStatusMessage: () => {
+    set({ statusMessage: null })
+  },
+}))