defmodule PolicyServiceWeb.Schemas.Policy do
  alias OpenApiSpex.Schema

  defmodule PaginationMeta do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PaginationMeta",
      type: :object,
      properties: %{
        total_count: %Schema{type: :integer},
        total_pages: %Schema{type: :integer},
        current_page: %Schema{type: :integer},
        page_size: %Schema{type: :integer},
        has_next: %Schema{type: :boolean},
        has_prev: %Schema{type: :boolean}
      }
    })
  end

  # ---------------------------------------------------------------------------
  # Applicant — discriminated by presence of keys
  # ---------------------------------------------------------------------------

  defmodule ApplicantIndividual do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "ApplicantIndividual",
      type: :object,
      required: [:name, :date_of_birth, :document_id],
      properties: %{
        name: %Schema{type: :string, example: "Juan Pérez"},
        date_of_birth: %Schema{type: :string, format: :date, example: "1985-06-15"},
        document_id: %Schema{type: :string, example: "8-123-456"}
      }
    })
  end

  defmodule ApplicantCorporate do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "ApplicantCorporate",
      type: :object,
      required: [:company_name, :ruc, :legal_rep_name, :legal_rep_document],
      properties: %{
        company_name: %Schema{type: :string, example: "Empresa ABC S.A."},
        ruc: %Schema{type: :string, example: "123456-1-123456"},
        legal_rep_name: %Schema{type: :string, example: "María García"},
        legal_rep_document: %Schema{type: :string, example: "8-456-789"}
      }
    })
  end

  defmodule ApplicantInfo do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "ApplicantInfo",
      oneOf: [ApplicantIndividual, ApplicantCorporate]
    })
  end

  # ---------------------------------------------------------------------------
  # Policy details — one per policy type
  # ---------------------------------------------------------------------------

  defmodule CarPolicyDetails do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "CarPolicyDetails",
      type: :object,
      required: [
        :plate,
        :make,
        :model,
        :year,
        :car_value,
        :use_type,
        :car_type,
        :chassis_number,
        :engine_number
      ],
      properties: %{
        plate: %Schema{type: :string, example: "ABC-1234"},
        make: %Schema{type: :string, example: "Toyota"},
        model: %Schema{type: :string, example: "Corolla"},
        year: %Schema{type: :integer, example: 2022},
        car_value: %Schema{type: :number, example: 18000},
        use_type: %Schema{type: :string, enum: ["private", "commercial", "bus", "taxi", "school"]},
        car_type: %Schema{
          type: :string,
          enum: [
            "sedan",
            "suv",
            "hatchback",
            "coupe",
            "convertible",
            "pickup",
            "van",
            "minivan",
            "truck"
          ]
        },
        chassis_number: %Schema{type: :string, example: "9BWZZZ377VT004251"},
        engine_number: %Schema{type: :string, example: "1NZ-FE-1234567"}
      }
    })
  end

  defmodule LifePolicyDetails do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "LifePolicyDetails",
      type: :object,
      required: [:coverage_amount, :beneficiary],
      properties: %{
        coverage_amount: %Schema{type: :number, example: 100_000},
        beneficiary: %Schema{type: :string, example: "María Pérez"}
      }
    })
  end

  defmodule FirePolicyDetails do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "FirePolicyDetails",
      type: :object,
      required: [:property_address, :property_value],
      properties: %{
        property_address: %Schema{type: :string, example: "Calle 50, Panama City"},
        property_value: %Schema{type: :number, example: 250_000}
      }
    })
  end

  defmodule PolicyDetails do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PolicyDetails",
      oneOf: [CarPolicyDetails, LifePolicyDetails, FirePolicyDetails]
    })
  end

  # ---------------------------------------------------------------------------
  # Shared
  # ---------------------------------------------------------------------------

  defmodule SelectedProvider do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "SelectedProvider",
      type: :object,
      required: [:provider_id, :email],
      properties: %{
        provider_id: %Schema{type: :string, format: :uuid},
        email: %Schema{type: :string, format: :email}
      }
    })
  end

  defmodule Plan do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "Plan",
      type: :object,
      properties: %{
        plan_id: %Schema{type: :string},
        name: %Schema{type: :string},
        premium: %Schema{type: :number},
        coverage_details: %Schema{type: :string},
        deductible: %Schema{type: :number, nullable: true},
        coverage_limit: %Schema{type: :number, nullable: true}
      }
    })
  end

  defmodule QuoteData do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "QuoteData",
      type: :object,
      properties: %{
        quote_id: %Schema{type: :string},
        valid_until: %Schema{type: :string, format: :date},
        received_at: %Schema{type: :string, format: :"date-time"},
        plans: %Schema{type: :array, items: Plan}
      }
    })
  end

  # ---------------------------------------------------------------------------
  # Requests
  # ---------------------------------------------------------------------------

  defmodule CreatePolicyRequest do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "CreatePolicyRequest",
      type: :object,
      required: [:policy_type, :applicant_info, :policy_details, :selected_providers],
      properties: %{
        policy_type: %Schema{
          type: :string,
          enum: ["car", "life", "fire"],
          description: "Determines the shape of policy_details"
        },
        applicant_info: ApplicantInfo,
        policy_details: PolicyDetails,
        selected_providers: %Schema{type: :array, items: SelectedProvider, minItems: 1}
      }
    })
  end

  defmodule AcceptQuoteRequest do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "AcceptQuoteRequest",
      type: :object,
      required: [:quote_id, :plan_id],
      properties: %{
        quote_id: %Schema{type: :string},
        plan_id: %Schema{type: :string},
        solicitation_fields: %Schema{
          type: :object,
          additionalProperties: %Schema{type: :string},
          description: "Optional flat map of AcroForm field names to values",
          nullable: true
        }
      }
    })
  end

  # ---------------------------------------------------------------------------
  # Responses
  # ---------------------------------------------------------------------------

  defmodule QuoteResponse do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "QuoteResponse",
      type: :object,
      properties: %{
        application_id: %Schema{type: :string},
        status: %Schema{type: :string}
      }
    })
  end

  defmodule SolicitationUrlResponse do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "SolicitationUrlResponse",
      type: :object,
      properties: %{
        download_url: %Schema{type: :string},
        s3_key: %Schema{type: :string},
        version: %Schema{type: :integer}
      }
    })
  end

  defmodule PolicySummary do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PolicySummary",
      type: :object,
      properties: %{
        application_id: %Schema{type: :string},
        policy_type: %Schema{type: :string, enum: ["car", "life", "fire"]},
        status: %Schema{
          type: :string,
          enum: ["quote_requested", "quotes_received", "solicitation_sent", "issued"]
        },
        applicant_info: ApplicantInfo,
        policy_details: PolicyDetails,
        policy_number: %Schema{type: :string, nullable: true},
        submitted_at: %Schema{type: :string, format: :"date-time"}
      }
    })
  end

  defmodule PolicyDetail do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PolicyDetail",
      type: :object,
      properties: %{
        application_id: %Schema{type: :string},
        org_id: %Schema{type: :string},
        submitted_by: %Schema{type: :string},
        policy_type: %Schema{type: :string, enum: ["car", "life", "fire"]},
        status: %Schema{
          type: :string,
          enum: ["quote_requested", "quotes_received", "solicitation_sent", "issued"]
        },
        applicant_info: ApplicantInfo,
        policy_details: PolicyDetails,
        selected_providers: %Schema{type: :array, items: %Schema{type: :string}},
        quotes: %Schema{type: :object, additionalProperties: QuoteData},
        accepted_quote_id: %Schema{type: :string, nullable: true},
        accepted_plan_id: %Schema{type: :string, nullable: true},
        accepted_provider_id: %Schema{type: :string, nullable: true},
        accepted_at: %Schema{type: :string, format: :"date-time", nullable: true},
        solicitation_id: %Schema{type: :string, nullable: true},
        solicitation_s3_key: %Schema{type: :string, nullable: true},
        policy_number: %Schema{type: :string, nullable: true},
        premium: %Schema{type: :number, nullable: true},
        effective_date: %Schema{type: :string, format: :date, nullable: true},
        expiry_date: %Schema{type: :string, format: :date, nullable: true},
        submitted_at: %Schema{type: :string, format: :"date-time"},
        solicitation_sent_at: %Schema{type: :string, format: :"date-time", nullable: true},
        issued_at: %Schema{type: :string, format: :"date-time", nullable: true}
      }
    })
  end

  defmodule PolicyListResponse do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PolicyListResponse",
      type: :object,
      properties: %{
        data: %Schema{type: :array, items: PolicySummary},
        meta: PaginationMeta
      }
    })
  end

  defmodule PolicyDetailResponse do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "PolicyDetailResponse",
      type: :object,
      properties: %{
        data: PolicyDetail
      }
    })
  end

  defmodule ErrorResponse do
    require OpenApiSpex

    OpenApiSpex.schema(%{
      title: "ErrorResponse",
      type: :object,
      properties: %{
        error: %Schema{type: :string}
      }
    })
  end
end