// Copyright 2016-2018, Pulumi Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package config

import (
	"encoding/json"

	"github.com/spf13/cast"

	"github.com/pulumi/pulumi/sdk/go/pulumi"
)

// Get loads an optional configuration value by its key, or returns "" if it doesn't exist.
func Get(ctx *pulumi.Context, key string) string {
	v, _ := ctx.GetConfig(key)
	return v
}

// GetBool loads an optional configuration value by its key, as a bool, or returns false if it doesn't exist.
func GetBool(ctx *pulumi.Context, key string) bool {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToBool(v)
	}
	return false
}

// GetFloat32 loads an optional configuration value by its key, as a float32, or returns 0.0 if it doesn't exist.
func GetFloat32(ctx *pulumi.Context, key string) float32 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToFloat32(v)
	}
	return 0
}

// GetFloat64 loads an optional configuration value by its key, as a float64, or returns 0.0 if it doesn't exist.
func GetFloat64(ctx *pulumi.Context, key string) float64 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToFloat64(v)
	}
	return 0
}

// GetInt loads an optional configuration value by its key, as a int, or returns 0 if it doesn't exist.
func GetInt(ctx *pulumi.Context, key string) int {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToInt(v)
	}
	return 0
}

// GetInt8 loads an optional configuration value by its key, as a int8, or returns 0 if it doesn't exist.
func GetInt8(ctx *pulumi.Context, key string) int8 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToInt8(v)
	}
	return 0
}

// GetInt16 loads an optional configuration value by its key, as a int16, or returns 0 if it doesn't exist.
func GetInt16(ctx *pulumi.Context, key string) int16 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToInt16(v)
	}
	return 0
}

// GetInt32 loads an optional configuration value by its key, as a int32, or returns 0 if it doesn't exist.
func GetInt32(ctx *pulumi.Context, key string) int32 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToInt32(v)
	}
	return 0
}

// GetInt64 loads an optional configuration value by its key, as a int64, or returns 0 if it doesn't exist.
func GetInt64(ctx *pulumi.Context, key string) int64 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToInt64(v)
	}
	return 0
}

// GetObject attempts to load an optional configuration value by its key into the specified output variable.
func GetObject(ctx *pulumi.Context, key string, output interface{}) error {
	if v, ok := ctx.GetConfig(key); ok {
		if err := json.Unmarshal([]byte(v), output); err != nil {
			return err
		}
	}

	return nil
}

// GetUint loads an optional configuration value by its key, as a uint, or returns 0 if it doesn't exist.
func GetUint(ctx *pulumi.Context, key string) uint {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToUint(v)
	}
	return 0
}

// GetUint8 loads an optional configuration value by its key, as a uint8, or returns 0 if it doesn't exist.
func GetUint8(ctx *pulumi.Context, key string) uint8 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToUint8(v)
	}
	return 0
}

// GetUint16 loads an optional configuration value by its key, as a uint16, or returns 0 if it doesn't exist.
func GetUint16(ctx *pulumi.Context, key string) uint16 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToUint16(v)
	}
	return 0
}

// GetUint32 loads an optional configuration value by its key, as a uint32, or returns 0 if it doesn't exist.
func GetUint32(ctx *pulumi.Context, key string) uint32 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToUint32(v)
	}
	return 0
}

// GetUint64 loads an optional configuration value by its key, as a uint64, or returns 0 if it doesn't exist.
func GetUint64(ctx *pulumi.Context, key string) uint64 {
	if v, ok := ctx.GetConfig(key); ok {
		return cast.ToUint64(v)
	}
	return 0
}
