// DB Planet MCP Server Infrastructure
// Deploys: Resource Group, Managed Identity, Key Vault,
//          Application Insights, Container App, Key Vault permissions

targetScope = 'subscription'

// ── Core parameters ──────────────────────────────────────────
@description('Environment name')
@allowed(['DEV', 'IAT', 'Prod'])
param environment string

@description('Azure region')
param location string = 'westeurope'

@description('Container image tag')
param imageTag string = 'latest'

@description('Set to true on second deployment after infra + permissions are in place')
param deployContainerApp bool = false

// ── Tags ─────────────────────────────────────────────────────
@description('Tags applied to all resources')
param tags object = {
  CostReference: 'H-450007-52-01'
  ReferenceID: 'A-113241'
  ReferenceName: 'DB Planet MCP Server'
  Environment: environment
}

// ── Existing infrastructure references ───────────────────────
@description('Central Key Vault name (shared secrets)')
param centralKeyVaultName string

@description('Central Key Vault resource group')
param centralKeyVaultResourceGroup string

@description('Container App Environment name')
param containerAppEnvironmentName string

@description('Container App Environment resource group')
param containerAppEnvironmentResourceGroup string

// ── Application configuration ────────────────────────────────
@description('Artifactory server URL')
param artifactoryServer string

@description('Registry username')
param registryUsername string

@description('DB Planet base URL (staging vs production)')
param dbplanetBaseUrl string

// ── Service Principal for Key Vault secrets management ───────
#disable-next-line secure-secrets-in-params // Object ID, not a secret
@description('Service Principal Object ID for Key Vault Secrets Officer role')
param secretsOfficerPrincipalId string = ''

// ── Custom domain (optional) ─────────────────────────────────
@description('Certificate name in Container App Environment')
param certificateName string = ''

@description('DNS zone name for custom domain')
param dnsZoneName string = ''

@description('DNS record name (subdomain)')
param dnsRecordName string = ''

@description('Resource group containing the DNS zone')
param dnsZoneResourceGroup string = 'Infrastructure'

// ── Derived values ───────────────────────────────────────────
var resourceGroupName = 'rg-dbplanet-mcp-${toLower(environment)}'
var resourceToken = toLower(uniqueString(subscription().id, resourceGroupName, location))

// ═══════════════════════════════════════════════════════════════
// 1. Resource Group
// ═══════════════════════════════════════════════════════════════
module rg 'modules/resource-group.bicep' = {
  name: 'deploy-rg'
  params: {
    resourceGroupName: resourceGroupName
    location: location
    tags: tags
  }
}

// ═══════════════════════════════════════════════════════════════
// 2. Managed Identity
// ═══════════════════════════════════════════════════════════════
module identity 'modules/managed-identity.bicep' = {
  name: 'deploy-identity'
  scope: resourceGroup(resourceGroupName)
  dependsOn: [rg]
  params: {
    environment: environment
    location: location
    tags: tags
    resourceToken: resourceToken
  }
}

// ═══════════════════════════════════════════════════════════════
// 3. Key Vault (app-specific, public access)
// ═══════════════════════════════════════════════════════════════
module keyVault 'modules/keyvault.bicep' = {
  name: 'deploy-keyvault'
  scope: resourceGroup(resourceGroupName)
  dependsOn: [rg]
  params: {
    environment: environment
    location: location
    tags: tags
    resourceToken: resourceToken
  }
}

// ═══════════════════════════════════════════════════════════════
// 4. Application Insights + Log Analytics
// ═══════════════════════════════════════════════════════════════
module appInsights 'modules/application-insights.bicep' = {
  name: 'deploy-app-insights'
  scope: resourceGroup(resourceGroupName)
  params: {
    environment: environment
    location: location
    tags: tags
    resourceToken: resourceToken
    keyVaultName: keyVault.outputs.keyVaultName
  }
}

// ═══════════════════════════════════════════════════════════════
// 5. Container App Certificate (existing, optional)
// ═══════════════════════════════════════════════════════════════
module certificate 'modules/container-app-certificate.bicep' = if (!empty(certificateName)) {
  name: 'deploy-certificate'
  scope: resourceGroup(containerAppEnvironmentResourceGroup)
  params: {
    containerAppEnvironmentName: containerAppEnvironmentName
    certificateName: certificateName
  }
}

// ═══════════════════════════════════════════════════════════════
// 6. Container App
// ═══════════════════════════════════════════════════════════════
var customDomainName = !empty(dnsRecordName) && !empty(dnsZoneName) ? '${dnsRecordName}.${dnsZoneName}' : ''

module containerApp 'modules/container-app.bicep' = if (deployContainerApp) {
  name: 'deploy-container-app'
  scope: resourceGroup(resourceGroupName)
  dependsOn: [rg]
  params: {
    environment: environment
    location: location
    tags: tags
    resourceToken: resourceToken
    centralKeyVaultName: centralKeyVaultName
    centralKeyVaultResourceGroup: centralKeyVaultResourceGroup
    appKeyVaultUri: keyVault.outputs.keyVaultUri
    containerAppEnvironmentName: containerAppEnvironmentName
    containerAppEnvironmentResourceGroup: containerAppEnvironmentResourceGroup
    artifactoryServer: artifactoryServer
    registryUsername: registryUsername
    managedIdentityId: identity.outputs.managedIdentityId
    imageTag: imageTag
    dbplanetBaseUrl: dbplanetBaseUrl
    customDomainName: !empty(certificateName) ? customDomainName : ''
    containerAppCertificateId: !empty(certificateName) ? certificate.outputs.certificateId! : ''
  }
}

// ═══════════════════════════════════════════════════════════════
// 7. DNS Record
// ═══════════════════════════════════════════════════════════════
module dnsRecord 'modules/dns-record.bicep' = if (deployContainerApp && !empty(dnsRecordName)) {
  name: 'deploy-dns-record'
  scope: resourceGroup(dnsZoneResourceGroup)
  params: {
    privateDnsZoneName: dnsZoneName
    aRecordName: dnsRecordName
    ipv4Address: containerApp.outputs.containerAppEnvironmentStaticIp!
  }
}

// ═══════════════════════════════════════════════════════════════
// 8. Key Vault Permissions
// ═══════════════════════════════════════════════════════════════

// 6a. Managed Identity → central Key Vault (read registry secrets)
module centralKvPermissions 'modules/key-vault-permissions.bicep' = {
  name: 'deploy-central-kv-permissions'
  scope: resourceGroup(centralKeyVaultResourceGroup)
  params: {
    keyVaultName: centralKeyVaultName
    principalId: identity.outputs.managedIdentityPrincipalId
    roleName: 'Key Vault Secrets User'
  }
}

// 6b. Managed Identity → app Key Vault (read app secrets)
module appKvIdentityPermissions 'modules/key-vault-permissions.bicep' = {
  name: 'deploy-app-kv-identity-permissions'
  scope: resourceGroup(resourceGroupName)
  params: {
    keyVaultName: keyVault.outputs.keyVaultName
    principalId: identity.outputs.managedIdentityPrincipalId
    roleName: 'Key Vault Secrets User'
  }
}

// 6c. Container App system identity → app Key Vault (read app secrets)
module appKvContainerAppPermissions 'modules/key-vault-permissions.bicep' = if (deployContainerApp) {
  name: 'deploy-app-kv-ca-permissions'
  scope: resourceGroup(resourceGroupName)
  params: {
    keyVaultName: keyVault.outputs.keyVaultName
    principalId: containerApp.outputs.systemIdentityPrincipalId!
    roleName: 'Key Vault Secrets User'
  }
}

// 6d. Service Principal → app Key Vault (read + write secrets for CI/CD)
module appKvOfficerPermissions 'modules/key-vault-permissions.bicep' = if (!empty(secretsOfficerPrincipalId)) {
  name: 'deploy-app-kv-officer-permissions'
  scope: resourceGroup(resourceGroupName)
  params: {
    keyVaultName: keyVault.outputs.keyVaultName
    principalId: secretsOfficerPrincipalId
    roleName: 'Key Vault Secrets Officer'
  }
}

// ═══════════════════════════════════════════════════════════════
// Outputs
// ═══════════════════════════════════════════════════════════════
output resourceGroupName string = rg.outputs.resourceGroupName
output keyVaultName string = keyVault.outputs.keyVaultName
output keyVaultUri string = keyVault.outputs.keyVaultUri
output containerAppName string = deployContainerApp ? containerApp.outputs.containerAppName! : ''
output containerAppFqdn string = deployContainerApp ? containerApp.outputs.containerAppFqdn! : ''
output managedIdentityId string = identity.outputs.managedIdentityId
output appInsightsName string = appInsights.outputs.applicationInsightsName