# Example: Complete Deployment Configuration with Nickel + SOPS Integration
#
# This example shows the hybrid pattern:
# 1. Infrastructure config in .ncl (readable, version-controlled)
# 2. Secrets in YAML (encrypted with SOPS)
# 3. Merged at deployment time

let sops = import "schemas/security/sops/main.ncl" in
let secrets_loader = import "schemas/security/secrets-loader.ncl" in
let config_merger = import "schemas/security/config-merger.ncl" in

{
  # ============================================
  # STEP 1: Default Configuration
  # ============================================
  defaults = {
    environment = "dev",
    deployment_mode = "solo",

    database = {
      type = "postgresql",
      host = "localhost",
      port = 5432,
      name = "myapp",
      user = "app_user",
      # Password placeholder - will be replaced by secrets
      password = "${secret:database.password}",
      ssl = false,
      pool_size = 10,
    },

    redis = {
      host = "localhost",
      port = 6379,
      # Password placeholder - will be replaced by secrets
      password = "${secret:redis.password}",
      db = 0,
      ttl = 3600,
    },

    api = {
      host = "0.0.0.0",
      port = 8080,
      # API key placeholder - will be replaced by secrets
      api_key = "${secret:api.api_key}",
      timeout = 30,
      max_connections = 100,
    },

    tls = {
      enabled = false,
      # Certificate placeholders - will be replaced by secrets
      certificate = "${secret:tls.certificate}",
      private_key = "${secret:tls.private_key}",
    },
  },

  # ============================================
  # STEP 2: Environment-Specific Overrides
  # ============================================
  environments = {
    # All environments inherit these
    all = {
      logging = {
        level = "info",
        format = "json",
      },
    },

    # Development overrides
    dev = {
      database = {
        host = "postgres-dev.local",
        ssl = false,
      },
      redis = {
        host = "redis-dev.local",
      },
      api = {
        port = 8080,
      },
      logging = {
        level = "debug",
      },
    },

    # Staging overrides
    staging = {
      database = {
        host = "postgres-staging.example.com",
        ssl = true,
      },
      redis = {
        host = "redis-staging.example.com",
      },
      api = {
        port = 443,
      },
      tls = {
        enabled = true,
      },
      logging = {
        level = "info",
      },
    },

    # Production overrides
    prod = {
      database = {
        host = "postgres-prod-cluster.example.com",
        port = 5432,
        ssl = true,
        pool_size = 50,
      },
      redis = {
        host = "redis-prod-cluster.example.com",
      },
      api = {
        port = 443,
        max_connections = 1000,
      },
      tls = {
        enabled = true,
      },
      logging = {
        level = "warn",
      },
    },
  },

  # ============================================
  # STEP 3: Deployment Modes
  # ============================================
  deployment_modes = {
    solo = {
      replicas = 1,
      resources = {
        cpu = "1",
        memory = "512Mi",
      },
    },

    ha = {
      replicas = 3,
      resources = {
        cpu = "2",
        memory = "2Gi",
      },
    },

    enterprise = {
      replicas = 5,
      resources = {
        cpu = "4",
        memory = "4Gi",
      },
    },
  },

  # ============================================
  # STEP 4: SOPS Configuration
  # ============================================
  sops_config = {
    dev = (sops.generate_sops_yaml "dev"),
    staging = (sops.generate_sops_yaml "staging"),
    prod = (sops.generate_sops_yaml "prod"),
  },

  # ============================================
  # STEP 5: Build Final Configuration
  # ============================================
  # This function is called at deployment time with:
  # - environment: "dev" | "staging" | "prod"
  # - secrets: loaded from config/secrets/{env}.yaml (SOPS-encrypted)
  # - deployment_mode: "solo" | "ha" | "enterprise"

  build_config = fun environment deployment_mode secrets =>
    let env_config = config_merger.by_environment @ { defaults = $.defaults, environments = $.environments } environment in
    let mode_config = ($.deployment_modes | std.record.get deployment_mode | default {}) in
    let base = config_merger.compose_config $.defaults env_config {} in
    let with_mode = config_merger.compose_config base mode_config {} in
    let final = config_merger.compose_config with_mode secrets {} in

    # Merge secrets into placeholders
    secrets_loader.merge final secrets,

  # ============================================
  # Export Configuration for Different Scenarios
  # ============================================

  # Development configuration (for local testing)
  config_dev = {
    environment = "dev",
    deployment_mode = "solo",
    config = (
      config_merger.compose_config
        $.defaults
        ($.environments | std.record.get "dev")
        {}
    ),
  },

  # Staging configuration (requires secrets)
  config_staging = {
    environment = "staging",
    deployment_mode = "ha",
    config = (
      config_merger.compose_config
        $.defaults
        ($.environments | std.record.get "staging")
        {}
    ),
  },

  # Production configuration (requires secrets)
  config_prod = {
    environment = "prod",
    deployment_mode = "enterprise",
    config = (
      config_merger.compose_config
        $.defaults
        ($.environments | std.record.get "prod")
        {}
    ),
  },

  # ============================================
  # Validation
  # ============================================

  validate = fun configuration =>
    let required_paths = [
      "database.host",
      "database.user",
      "redis.host",
      "api.port",
    ] in
    config_merger.validate_complete configuration required_paths,
}