(ns tui.render-test
  "Unit tests for hiccup rendering."
  (:require [clojure.test :refer [deftest testing is]]
            [clojure.string :as str]
            [tui.render :as render]
            [tui.ansi :as ansi]))

;; === Text Rendering Tests ===

(deftest render-plain-text-test
  (testing "renders plain strings"
    (is (= "hello" (render/render "hello")))
    (is (= "world" (render/render "world"))))

  (testing "renders numbers as strings"
    (is (= "42" (render/render 42)))
    (is (= "3.14" (render/render 3.14))))

  (testing "renders nil as empty string"
    (is (= "" (render/render nil)))))

(deftest render-text-element-test
  (testing "renders :text element with string child"
    (is (= "hello" (render/render [:text "hello"]))))

  (testing "renders :text element with multiple children"
    (is (= "hello world" (render/render [:text "hello" " " "world"]))))

  (testing "renders nested text"
    (is (= "42" (render/render [:text 42])))))

(deftest render-styled-text-test
  (testing "renders bold text"
    (let [result (render/render [:text {:bold true} "bold"])]
      (is (str/includes? result "bold"))
      (is (str/includes? result "\u001b["))  ; Contains ANSI escape
      (is (str/includes? result "1m"))))     ; Bold code

  (testing "renders colored text"
    (let [result (render/render [:text {:fg :red} "red"])]
      (is (str/includes? result "red"))
      (is (str/includes? result "31m"))))    ; Red foreground code

  (testing "renders multiple styles"
    (let [result (render/render [:text {:bold true :fg :green} "styled"])]
      (is (str/includes? result "styled"))
      (is (str/includes? result "1"))        ; Bold
      (is (str/includes? result "32")))))    ; Green

;; === Layout Tests ===

(deftest render-row-test
  (testing "renders row with children horizontally"
    (is (= "ab" (render/render [:row "a" "b"])))
    (is (= "abc" (render/render [:row "a" "b" "c"]))))

  (testing "renders row with gap"
    (is (= "a b" (render/render [:row {:gap 1} "a" "b"])))
    (is (= "a  b" (render/render [:row {:gap 2} "a" "b"]))))

  (testing "renders nested elements in row"
    (is (= "hello world" (render/render [:row [:text "hello"] " " [:text "world"]])))))

(deftest render-col-test
  (testing "renders col with children vertically"
    (is (= "a\nb" (render/render [:col "a" "b"])))
    (is (= "a\nb\nc" (render/render [:col "a" "b" "c"]))))

  (testing "renders col with gap"
    (is (= "a\n\nb" (render/render [:col {:gap 1} "a" "b"])))
    (is (= "a\n\n\nb" (render/render [:col {:gap 2} "a" "b"]))))

  (testing "renders nested elements in col"
    (is (= "line1\nline2" (render/render [:col [:text "line1"] [:text "line2"]])))))

(deftest render-nested-layout-test
  (testing "renders row inside col"
    (is (= "a b\nc d" (render/render [:col
                                       [:row "a" " " "b"]
                                       [:row "c" " " "d"]]))))

  (testing "renders col inside row"
    (is (= "a\nb c\nd" (render/render [:row
                                        [:col "a" "b"]
                                        " "
                                        [:col "c" "d"]])))))

;; === Box Tests ===

(deftest render-box-test
  (testing "renders box with content"
    (let [result (render/render [:box "hello"])]
      (is (str/includes? result "hello"))
      (is (str/includes? result "─"))        ; Horizontal border
      (is (str/includes? result "│"))))      ; Vertical border

  (testing "renders box with title"
    (let [result (render/render [:box {:title "Title"} "content"])]
      (is (str/includes? result "Title"))
      (is (str/includes? result "content"))))

  (testing "renders box with different border styles"
    (let [rounded (render/render [:box {:border :rounded} "x"])
          single (render/render [:box {:border :single} "x"])
          double (render/render [:box {:border :double} "x"])
          ascii (render/render [:box {:border :ascii} "x"])]
      (is (str/includes? rounded "╭"))
      (is (str/includes? single "┌"))
      (is (str/includes? double "╔"))
      (is (str/includes? ascii "+")))))

(deftest render-box-padding-test
  (testing "renders box with numeric padding"
    (let [result (render/render [:box {:padding 1} "x"])
          lines (str/split result #"\n")]
      ;; Should have empty lines for vertical padding
      (is (> (count lines) 3))))

  (testing "renders box with vector padding"
    (let [result (render/render [:box {:padding [0 2]} "x"])]
      ;; Should have horizontal padding (spaces around content)
      (is (str/includes? result "  x  ")))))

;; === Space Tests ===

(deftest render-space-test
  (testing "renders space with default size"
    (is (= " " (render/render [:space]))))

  (testing "renders space with custom width"
    (is (= "   " (render/render [:space {:width 3}]))))

  (testing "renders space with custom height"
    (is (= " \n " (render/render [:space {:height 2}]))))

  (testing "renders space with width and height"
    (is (= "  \n  " (render/render [:space {:width 2 :height 2}])))))

;; === Convenience Function Tests ===

(deftest convenience-functions-test
  (testing "text function creates text element"
    (is (= [:text {} "hello"] (render/text "hello")))
    (is (= [:text {:bold true} "bold"] (render/text {:bold true} "bold"))))

  (testing "row function creates row element"
    (is (= [:row {} "a" "b"] (render/row "a" "b")))
    (is (= [:row {:gap 1} "a" "b"] (render/row {:gap 1} "a" "b"))))

  (testing "col function creates col element"
    (is (= [:col {} "a" "b"] (render/col "a" "b")))
    (is (= [:col {:gap 1} "a" "b"] (render/col {:gap 1} "a" "b"))))

  (testing "box function creates box element"
    (is (= [:box {} "content"] (render/box "content")))
    (is (= [:box {:border :single} "x"] (render/box {:border :single} "x")))))