# backend Configuration

provider "aws" {
  region = var.region
  default_tags {
    tags = {
      "Project" = var.project_name,
      "Env"     = var.project_env

    }

  }

}

terraform {
  backend "s3" {
    bucket = "terraform-s3bucket-zomato"
    key    = "dev/terraform.tfstate"
    region = "ap-south-1"
  }
}



# Secutity group creation

resource "aws_security_group" "frontend" {
  name_prefix = "${var.project_name}-${var.project_env}-"
  description = "Allow ssh,http,https"

  ingress {
    description      = "HTTPS"
    from_port        = 443
    to_port          = 443
    protocol         = "tcp"
    cidr_blocks      = ["0.0.0.0/0"]
    ipv6_cidr_blocks = ["::/0"]
  }
  ingress {
    description      = "HTTP"
    from_port        = 80
    to_port          = 80
    protocol         = "tcp"
    cidr_blocks      = ["0.0.0.0/0"]
    ipv6_cidr_blocks = ["::/0"]
  }
  ingress {
    description      = "SSH"
    from_port        = 22
    to_port          = 22
    protocol         = "tcp"
    cidr_blocks      = ["0.0.0.0/0"]
    ipv6_cidr_blocks = ["::/0"]
  }

  egress {
    from_port        = 0
    to_port          = 0
    protocol         = "-1"
    cidr_blocks      = ["0.0.0.0/0"]
    ipv6_cidr_blocks = ["::/0"]
  }

  tags = {
    Name = "${var.project_name}-${var.project_env}"

  }
}


# Ec2-instance creation

resource "aws_instance" "shopping" {
  ami                    = var.ami
  instance_type          = var.instance_type
  availability_zone      = var.az
  key_name               = var.key
  user_data              = file("userdata.sh")
  vpc_security_group_ids = [aws_security_group.frontend.id]
  tags = {
    "Name" = "Shopping-app-template",
  }
}


# Fetching the details of the latest ami


data "aws_ami" "shopping" {
  owners      = ["self"]
  most_recent = true

  filter {
    name   = "name"
    values = ["shopping-app-version-*"]
  }

  filter {
    name   = "tag:Env"
    values = ["Dev"]
  }

  filter {
    name   = "tag:Project"
    values = ["Zomato"]
  }
}


# Creating the Dev Instance from the latest AMI

resource "aws_instance" "dev" {
  ami                    = data.aws_ami.shopping.id
  instance_type          = var.instance_type
  availability_zone      = var.az
  key_name               = var.key
  vpc_security_group_ids = [aws_security_group.frontend.id]
  tags = {
    "Name" = "${var.project_name}-${var.project_env}-"
  }

  lifecycle {
    create_before_destroy = true
  }
}


# Fetching the details of the public hosted zone

data "aws_route53_zone" "domain" {
  name         = var.domain_name
}


# EIP allocation

resource "aws_eip" "ip" {
  instance = aws_instance.dev.id
  vpc      = true
}


# Record add

resource "aws_route53_record" "www" {
  zone_id = data.aws_route53_zone.domain.zone_id
  name    = var.domain_prefix
  type    = "A"
  ttl     = "5"
  records = [aws_eip.ip.public_ip]
}


################### Variables.tf code ######################

[ec2-user@ip-172-31-35-236 s3-versioning]$ cat variables.tf
variable "project_name" {
  type    = string
  default = "Zomato"
}

variable "project_env" {
  type    = string
  default = "Dev"
}

variable "region" {
  description = "Region of the aws console where we execute the code"
  type        = string
  default     = "ap-south-1"
}

variable "domain_prefix" {
type = string
default = "blog"
}

variable "domain_name" {
  description = "Name of the domain"
  type        = string
  default     = "chrisich.fun"
}

variable "instance_type" {
  description = "instance type to launch"
  type        = string
  default     = "t2.micro"
}

variable "ami" {
  default = "ami-0b08bfc6ff7069aff"
}
variable "az" {
  description = "which AZ"
  type        = string
  default     = "ap-south-1a"
}

variable "key" {
  type    = string
  default = "mumbai-new"
}



######################   Output.tf code  ###################

[ec2-user@ip-172-31-35-236 s3-versioning]$ cat output.tf
output "public_ip_zomato" {
  value = aws_eip.ip.public_ip
}

output "http_url_zomato" {
  value = "http://${aws_instance.dev.public_dns}"
}

output "AMI_ID_latest" {
  value = data.aws_ami.shopping.id
}

output "frontend_URL" {
value = "http://${var.domain_prefix}.${var.domain_name}"
}

output "public_ip_template" {
  value = aws_instance.shopping.public_ip
}


############################# Terraform Output ############################

[ec2-user@ip-172-31-35-236 s3-versioning]$ terraform output
AMI_ID_latest = "ami-03a12834ecdf42438"
frontend_URL = "http://blog.chrisich.fun"
http_url_zomato = "http://ec2-13-200-54-5.ap-south-1.compute.amazonaws.com"
public_ip_template = "43.205.233.33"
public_ip_zomato = "13.200.54.5"
[ec2-user@ip-172-31-35-236 s3-versioning]$



############################## Terraform STATE show ############################

[ec2-user@ip-172-31-35-236 s3-versioning]$ terraform state show data.aws_ami.shopping
# data.aws_ami.shopping:
data "aws_ami" "shopping" {
    architecture          = "x86_64"
    arn                   = "arn:aws:ec2:ap-south-1::image/ami-03a12834ecdf42438"
    block_device_mappings = [
        {
            device_name  = "/dev/xvda"
            ebs          = {
                "delete_on_termination" = "true"
                "encrypted"             = "false"
                "iops"                  = "3000"
                "snapshot_id"           = "snap-09d60775e858703f1"
                "throughput"            = "125"
                "volume_size"           = "8"
                "volume_type"           = "gp3"
            }
            no_device    = ""
            virtual_name = ""
        },
    ]
    boot_mode             = "uefi-preferred"
    creation_date         = "2023-05-12T11:06:09.000Z"
    description           = "shopping-app-version-3"
    ena_support           = true
    hypervisor            = "xen"
    id                    = "ami-03a12834ecdf42438"
    image_id              = "ami-03a12834ecdf42438"
    image_location        = "945577359662/shopping-app-version-3"
    image_type            = "machine"
    imds_support          = "v2.0"
    include_deprecated    = false
    most_recent           = true
    name                  = "shopping-app-version-3"
    owner_id              = "945577359662"
    owners                = [
        "self",
    ]
    platform_details      = "Linux/UNIX"
    product_codes         = []
    public                = false
    root_device_name      = "/dev/xvda"
    root_device_type      = "ebs"
    root_snapshot_id      = "snap-09d60775e858703f1"
    sriov_net_support     = "simple"
    state                 = "available"
    state_reason          = {
        "code"    = "UNSET"
        "message" = "UNSET"
    }
    tags                  = {
        "Env"     = "Dev"
        "Name"    = "shopping-app-version-3"
        "Project" = "Zomato"
    }
    usage_operation       = "RunInstances"
    virtualization_type   = "hvm"

    filter {
        name   = "name"
        values = [
            "shopping-app-version-*",
        ]
    }
    filter {
        name   = "tag:Env"
        values = [
            "Dev",
        ]
    }
    filter {
        name   = "tag:Project"
        values = [
            "Zomato",
        ]
    }
}