<template>
  <div class="mcp-keys-panel">
    <div class="mcp-keys-header">
      <h2 class="mcp-keys-title">MCP Keys</h2>
    </div>

    <p class="mcp-keys-description">
      Some connected MCP servers accept a personal key ("one key per user").
      Save your own key to make the server work on it; without a key it falls
      back to the shared default configured on this Navi.
    </p>

    <div v-if="serversStore.loading" class="mcp-keys-loading">
      <GnLoader circle label="Loading MCP servers" />
    </div>

    <div v-else-if="!serversStore.servers.length" class="mcp-keys-empty">
      <i class="ph ph-plugs-connected empty-icon" aria-hidden="true"></i>
      <p>
        No MCP servers accept a personal key here. A server appears in this
        list once its config declares a <code>user_key</code> slot — until then
        it runs on the shared default configured on this Navi.
      </p>
    </div>

    <div v-else class="mcp-keys-rows">
      <div v-for="server in serversStore.servers" :key="server.server_name" class="mcp-keys-row">
        <div class="mcp-keys-info">
          <div class="mcp-keys-server">{{ server.server_name }}</div>
          <div class="mcp-keys-where">{{ keyLocation(server) }}</div>
          <div v-if="server.updated_at" class="mcp-keys-updated">
            Personal key set {{ formatDate(server.updated_at) }}
          </div>
        </div>
        <GnInput
          v-model="keys[server.server_name]"
          type="password"
          :placeholder="server.has_key ? '••• saved — enter a new key to replace' : 'Paste your key'"
          class="mcp-keys-input"
          @keyup.enter="onSave(server)"
        />
        <div class="mcp-keys-actions">
          <GnButton
            variant="primary"
            size="sm"
            :disabled="!keys[server.server_name] || serversStore.savingServer === server.server_name"
            @click="onSave(server)"
          >
            Save
          </GnButton>
          <GnButton
            v-if="server.has_key"
            variant="ghost"
            size="sm"
            :disabled="serversStore.savingServer === server.server_name"
            @click="onReset(server)"
          >
            Reset to default
          </GnButton>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { onMounted, reactive } from 'vue'
import { useMcpKeysStore } from '@/stores/mcpKeys.js'
import { useConfirm } from '@/composables/useConfirm.js'
import { useToast } from 'gnexus-ui-kit/vue'
import { GnButton, GnInput, GnLoader } from 'gnexus-ui-kit/vue'

const serversStore = useMcpKeysStore()
const confirm = useConfirm()
const toast = useToast()

const keys = reactive({})

onMounted(() => {
  serversStore.fetchServers()
})

function keyLocation(server) {
  return server.key_type === 'header'
    ? `${server.key_location} header${server.prefix ? ` (${server.prefix}…)` : ''}`
    : `${server.key_location} env`
}

async function onSave(server) {
  const key = (keys[server.server_name] || '').trim()
  if (!key) return
  try {
    await serversStore.saveKey(server.server_name, key)
    keys[server.server_name] = ''
    toast.success({ title: `Key saved for ${server.server_name}` })
  } catch (err) {
    toast.error({ title: 'Failed to save key', text: err.message })
  }
}

async function onReset(server) {
  const ok = await confirm(
    `Reset the key for "${server.server_name}" to the shared default?`
  )
  if (!ok) return
  try {
    await serversStore.resetKey(server.server_name)
    keys[server.server_name] = ''
    toast.success({ title: `Key reset for ${server.server_name}` })
  } catch (err) {
    toast.error({ title: 'Failed to reset key', text: err.message })
  }
}

function formatDate(iso) {
  const d = new Date(iso)
  return d.toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' })
}
</script>

<style scoped lang="scss">
@use 'kit-deps' as *;

.mcp-keys-panel {
  margin-bottom: 24px;
}

.mcp-keys-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.mcp-keys-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  color: var(--gn-color-text-medium);
}

.mcp-keys-description {
  margin: 0 0 16px;
  font-size: 0.875rem;
  color: var(--gn-color-text-medium);
}

.mcp-keys-loading {
  padding: 24px;
  text-align: center;
}

.mcp-keys-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 32px 24px;
  border: 1px dashed var(--gn-color-border);
  border-radius: var(--gn-radius-md);
  text-align: center;

  .empty-icon {
    font-size: 2rem;
    color: var(--gn-color-text-dimmed);
  }

  p {
    margin: 0;
    max-width: 52ch;
    font-size: 0.875rem;
    color: var(--gn-color-text-medium);
  }

  code {
    font-family: var(--gn-font-mono, monospace);
    font-size: 0.8125rem;
  }
}

.mcp-keys-rows {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mcp-keys-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--gn-color-border);
  border-radius: var(--gn-radius-md);
}

.mcp-keys-info {
  flex: 0 0 220px;
  min-width: 0;
}

.mcp-keys-server {
  font-weight: 600;
  color: var(--gn-color-text-strong);
}

.mcp-keys-where {
  font-size: 0.8125rem;
  color: var(--gn-color-text-medium);
}

.mcp-keys-updated {
  font-size: 0.75rem;
  color: var(--gn-color-text-dimmed);
}

.mcp-keys-input {
  flex: 1 1 auto;
  min-width: 160px;
}

.mcp-keys-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
</style>