# typed: strict
# frozen_string_literal: true

require_relative "d3"

require "erb"

module Spoom
  module Coverage
    class Template
      extend T::Sig
      extend T::Helpers

      abstract!

      # Create a new template from an Erb file path
      sig { params(template: String).void }
      def initialize(template:)
        @template = template
      end

      sig { returns(String) }
      def erb
        File.read(@template)
      end

      sig { returns(String) }
      def html
        ERB.new(erb).result(get_binding)
      end

      sig { returns(Binding) }
      def get_binding # rubocop:disable Naming/AccessorMethodName
        binding
      end
    end

    class Page < Template
      extend T::Sig
      extend T::Helpers

      abstract!

      TEMPLATE = T.let("#{Spoom::SPOOM_PATH}/templates/page.erb", String)

      sig { returns(String) }
      attr_reader :title

      sig { returns(D3::ColorPalette) }
      attr_reader :palette

      sig { params(title: String, palette: D3::ColorPalette, template: String).void }
      def initialize(title:, palette:, template: TEMPLATE)
        super(template: template)
        @title = title
        @palette = palette
      end

      sig { returns(String) }
      def header_style
        D3.header_style
      end

      sig { returns(String) }
      def header_script
        D3.header_script(palette)
      end

      sig { returns(String) }
      def header_html
        "<h1 class='display-3'>#{title}</h1>"
      end

      sig { returns(String) }
      def body_html
        cards.map(&:html).join("\n")
      end

      sig { abstract.returns(T::Array[Cards::Card]) }
      def cards; end

      sig { returns(String) }
      def footer_html
        "Generated by <a href='https://github.com/Shopify/spoom'>spoom</a> on #{Time.now.utc}."
      end
    end

    module Cards
      class Card < Template
        extend T::Sig

        TEMPLATE = T.let("#{Spoom::SPOOM_PATH}/templates/card.erb", String)

        sig { returns(T.nilable(String)) }
        attr_reader :title, :body

        sig { params(template: String, title: T.nilable(String), body: T.nilable(String)).void }
        def initialize(template: TEMPLATE, title: nil, body: nil)
          super(template: template)
          @title = title
          @body = body
        end
      end

      class Erb < Card
        extend T::Sig
        extend T::Helpers

        abstract!

        sig { void }
        def initialize; end

        sig { override.returns(String) }
        def html
          ERB.new(erb).result(get_binding)
        end

        sig { abstract.returns(String) }
        def erb; end
      end

      class Snapshot < Card
        extend T::Sig

        TEMPLATE = T.let("#{Spoom::SPOOM_PATH}/templates/card_snapshot.erb", String)

        sig { returns(Coverage::Snapshot) }
        attr_reader :snapshot

        sig { params(snapshot: Coverage::Snapshot, title: String).void }
        def initialize(snapshot:, title: "Snapshot")
          super(template: TEMPLATE, title: title)
          @snapshot = snapshot
        end

        sig { returns(D3::Pie::Sigils) }
        def pie_sigils
          D3::Pie::Sigils.new('pie_sigils', 'Sigils', snapshot)
        end

        sig { returns(D3::Pie::Calls) }
        def pie_calls
          D3::Pie::Calls.new('pie_calls', 'Calls', snapshot)
        end

        sig { returns(D3::Pie::Sigs) }
        def pie_sigs
          D3::Pie::Sigs.new('pie_sigs', 'Sigs', snapshot)
        end
      end

      class Map < Card
        extend T::Sig

        sig { params(sigils_tree: FileTree, title: String).void }
        def initialize(sigils_tree:, title: "Strictness Map")
          super(title: title, body: D3::CircleMap::Sigils.new("map_sigils", sigils_tree).html)
        end
      end

      class Timeline < Card
        extend T::Sig

        sig { params(title: String, timeline: D3::Timeline).void }
        def initialize(title:, timeline:)
          super(title: title, body: timeline.html)
        end

        class Sigils < Timeline
          extend T::Sig

          sig { params(snapshots: T::Array[Coverage::Snapshot], title: String).void }
          def initialize(snapshots:, title: "Sigils Timeline")
            super(title: title, timeline: D3::Timeline::Sigils.new("timeline_sigils", snapshots))
          end
        end

        class Calls < Timeline
          extend T::Sig

          sig { params(snapshots: T::Array[Coverage::Snapshot], title: String).void }
          def initialize(snapshots:, title: "Calls Timeline")
            super(title: title, timeline: D3::Timeline::Calls.new("timeline_calls", snapshots))
          end
        end

        class Sigs < Timeline
          extend T::Sig

          sig { params(snapshots: T::Array[Coverage::Snapshot], title: String).void }
          def initialize(snapshots:, title: "Signatures Timeline")
            super(title: title, timeline: D3::Timeline::Sigs.new("timeline_sigs", snapshots))
          end
        end

        class Versions < Timeline
          extend T::Sig

          sig { params(snapshots: T::Array[Coverage::Snapshot], title: String).void }
          def initialize(snapshots:, title: "Sorbet Versions Timeline")
            super(title: title, timeline: D3::Timeline::Versions.new("timeline_versions", snapshots))
          end
        end

        class Runtimes < Timeline
          extend T::Sig

          sig { params(snapshots: T::Array[Coverage::Snapshot], title: String).void }
          def initialize(snapshots:, title: "Sorbet Typechecking Time")
            super(title: title, timeline: D3::Timeline::Runtimes.new("timeline_runtimes", snapshots))
          end
        end
      end

      class SorbetIntro < Erb
        extend T::Sig

        sig { params(sorbet_intro_commit: T.nilable(String), sorbet_intro_date: T.nilable(Time)).void }
        def initialize(sorbet_intro_commit: nil, sorbet_intro_date: nil)
          @sorbet_intro_commit = sorbet_intro_commit
          @sorbet_intro_date = sorbet_intro_date
        end

        sig { override.returns(String) }
        def erb
          <<~ERB
            <div class="text-center" style="margin-top: 30px">
              Typchecked by Sorbet since <b>#{@sorbet_intro_date&.strftime('%F')}</b>
              (commit <b>#{@sorbet_intro_commit}</b>).
            </div>
          ERB
        end
      end
    end

    class Report < Page
      extend T::Sig

      sig { returns(String) }
      attr_reader :project_name

      sig { returns(T.nilable(String)) }
      attr_reader :sorbet_intro_commit

      sig { returns(T.nilable(Time)) }
      attr_reader :sorbet_intro_date

      sig { returns(T::Array[Snapshot]) }
      attr_reader :snapshots

      sig { returns(FileTree) }
      attr_reader :sigils_tree

      sig do
        params(
          project_name: String,
          palette: D3::ColorPalette,
          snapshots: T::Array[Snapshot],
          sigils_tree: FileTree,
          sorbet_intro_commit: T.nilable(String),
          sorbet_intro_date: T.nilable(Time),
        ).void
      end
      def initialize(
        project_name:,
        palette:,
        snapshots:,
        sigils_tree:,
        sorbet_intro_commit: nil,
        sorbet_intro_date: nil
      )
        super(title: project_name, palette: palette)
        @project_name = project_name
        @snapshots = snapshots
        @sigils_tree = sigils_tree
        @sorbet_intro_commit = sorbet_intro_commit
        @sorbet_intro_date = sorbet_intro_date
      end

      sig { override.returns(String) }
      def header_html
        last = T.must(snapshots.last)
        <<~ERB
          <h1 class="display-3">
            #{project_name}
            <span class="badge badge-pill badge-dark" style="font-size: 20%;">#{last.commit_sha}</span>
          </h1>
        ERB
      end

      sig { override.returns(T::Array[Cards::Card]) }
      def cards
        last = T.must(snapshots.last)
        cards = []
        cards << Cards::Snapshot.new(snapshot: last)
        cards << Cards::Map.new(sigils_tree: sigils_tree)
        cards << Cards::Timeline::Sigils.new(snapshots: snapshots)
        cards << Cards::Timeline::Calls.new(snapshots: snapshots)
        cards << Cards::Timeline::Sigs.new(snapshots: snapshots)
        cards << Cards::Timeline::Versions.new(snapshots: snapshots)
        cards << Cards::Timeline::Runtimes.new(snapshots: snapshots)
        cards << Cards::SorbetIntro.new(sorbet_intro_commit: sorbet_intro_commit, sorbet_intro_date: sorbet_intro_date)
        cards
      end
    end
  end
end