defmodule Pxshot do
  @moduledoc """
  Official Elixir SDK for the Pxshot screenshot API.

  ## Configuration

  Configure your API key in `config/config.exs`:

      config :pxshot, api_key: "px_your_api_key"

  Or pass it directly when creating a client:

      client = Pxshot.client(api_key: "px_your_api_key")

  ## Usage

      # Take a screenshot
      {:ok, image_binary} = Pxshot.screenshot(client, url: "https://example.com")

      # Store screenshot and get URL
      {:ok, result} = Pxshot.screenshot(client, url: "https://example.com", store: true)
      IO.puts(result.url)

      # Check usage
      {:ok, usage} = Pxshot.usage(client)

  ## Bang Variants

  All functions have bang variants that raise on error:

      image = Pxshot.screenshot!(client, url: "https://example.com")

  """

  alias Pxshot.{Client, Error, Response}

  @type client :: Client.t()
  @type screenshot_opt ::
          {:url, String.t()}
          | {:format, String.t()}
          | {:quality, integer()}
          | {:width, integer()}
          | {:height, integer()}
          | {:full_page, boolean()}
          | {:wait_until, String.t()}
          | {:wait_for_selector, String.t()}
          | {:wait_for_timeout, integer()}
          | {:device_scale_factor, number()}
          | {:store, boolean()}
          | {:block_ads, boolean()}

  @doc """
  Creates a new Pxshot client.

  ## Options

    * `:api_key` - Your Pxshot API key (required unless configured globally)
    * `:base_url` - API base URL (default: "https://api.pxshot.com")
    * `:timeout` - Request timeout in milliseconds (default: 30_000)

  ## Examples

      # Using global config
      client = Pxshot.client()

      # With explicit API key
      client = Pxshot.client(api_key: "px_your_api_key")

      # With custom options
      client = Pxshot.client(api_key: "px_key", timeout: 60_000)

  """
  @spec client(keyword()) :: client()
  def client(opts \\ []) do
    Client.new(opts)
  end

  @doc """
  Takes a screenshot of the given URL.

  ## Options

    * `:url` - URL to screenshot (required)
    * `:format` - Image format: "png", "jpeg", "webp" (default: "png")
    * `:quality` - JPEG/WebP quality 1-100 (default: 80)
    * `:width` - Viewport width in pixels (default: 1920)
    * `:height` - Viewport height in pixels (default: 1080)
    * `:full_page` - Capture full scrollable page (default: false)
    * `:wait_until` - Wait condition: "load", "domcontentloaded", "networkidle" (default: "load")
    * `:wait_for_selector` - CSS selector to wait for before capture
    * `:wait_for_timeout` - Additional wait time in ms after page load
    * `:device_scale_factor` - Device scale factor for retina (default: 1)
    * `:store` - Store image and return URL instead of binary (default: false)
    * `:block_ads` - Block ads and trackers (default: false)

  ## Returns

    * `{:ok, binary}` - Image data when `store: false`
    * `{:ok, %Pxshot.Response.StoredScreenshot{}}` - When `store: true`
    * `{:error, %Pxshot.Error{}}` - On failure

  ## Examples

      # Basic screenshot
      {:ok, png_data} = Pxshot.screenshot(client, url: "https://example.com")

      # Full page JPEG
      {:ok, jpeg_data} = Pxshot.screenshot(client,
        url: "https://example.com",
        format: "jpeg",
        quality: 90,
        full_page: true
      )

      # Store and get URL
      {:ok, result} = Pxshot.screenshot(client, url: "https://example.com", store: true)
      IO.puts(result.url)

  """
  @spec screenshot(client(), [screenshot_opt()]) ::
          {:ok, binary() | Response.StoredScreenshot.t()} | {:error, Error.t()}
  def screenshot(client, opts) do
    Client.screenshot(client, opts)
  end

  @doc """
  Takes a screenshot, raising on error.

  See `screenshot/2` for options.
  """
  @spec screenshot!(client(), [screenshot_opt()]) :: binary() | Response.StoredScreenshot.t()
  def screenshot!(client, opts) do
    case screenshot(client, opts) do
      {:ok, result} -> result
      {:error, error} -> raise error
    end
  end

  @doc """
  Gets current usage statistics.

  ## Returns

    * `{:ok, %Pxshot.Response.Usage{}}` - Usage statistics
    * `{:error, %Pxshot.Error{}}` - On failure

  ## Examples

      {:ok, usage} = Pxshot.usage(client)
      IO.puts("Used \#{usage.screenshots_used} of \#{usage.screenshots_limit} screenshots")

  """
  @spec usage(client()) :: {:ok, Response.Usage.t()} | {:error, Error.t()}
  def usage(client) do
    Client.usage(client)
  end

  @doc """
  Gets current usage statistics, raising on error.
  """
  @spec usage!(client()) :: Response.Usage.t()
  def usage!(client) do
    case usage(client) do
      {:ok, result} -> result
      {:error, error} -> raise error
    end
  end

  @doc """
  Checks API health status.

  ## Returns

    * `{:ok, %Pxshot.Response.Health{}}` - Health status
    * `{:error, %Pxshot.Error{}}` - On failure

  ## Examples

      {:ok, health} = Pxshot.health(client)
      if health.status == "ok", do: IO.puts("API is healthy!")

  """
  @spec health(client()) :: {:ok, Response.Health.t()} | {:error, Error.t()}
  def health(client) do
    Client.health(client)
  end

  @doc """
  Checks API health status, raising on error.
  """
  @spec health!(client()) :: Response.Health.t()
  def health!(client) do
    case health(client) do
      {:ok, result} -> result
      {:error, error} -> raise error
    end
  end
end