describe("Koptinterface module", function()
    local DocumentRegistry, Koptinterface, Cache
    setup(function()
        require("commonrequire")
        DocumentRegistry = require("document/documentregistry")
        Koptinterface = require("document/koptinterface")
        Cache = require("cache")
    end)

    local tall_pdf = "spec/front/unit/data/tall.pdf"
    local complex_pdf = "spec/front/unit/data/sample.pdf"
    local paper_pdf = "spec/front/unit/data/paper.pdf"
    local doc, complex_doc, paper_doc

    before_each(function()
        doc = DocumentRegistry:openDocument(tall_pdf)
        complex_doc = DocumentRegistry:openDocument(complex_pdf)
        paper_doc = DocumentRegistry:openDocument(paper_pdf)
        doc.configurable.text_wrap = 0
        complex_doc.configurable.text_wrap = 0
        paper_doc.configurable.text_wrap = 0
        Cache:clear()
    end)

    after_each(function()
        doc:close()
        complex_doc:close()
        paper_doc:close()
    end)

    it("should get auto bbox", function()
        local auto_bbox = Koptinterface:getAutoBBox(doc, 1)
        assertAlmostEquals(22, auto_bbox.x0, 0.5)
        assertAlmostEquals(38, auto_bbox.y0, 0.5)
        assertAlmostEquals(548, auto_bbox.x1, 0.5)
        assertAlmostEquals(1387, auto_bbox.y1, 0.5)
    end)

    it("should get semi auto bbox", function()
        local semiauto_bbox = Koptinterface:getSemiAutoBBox(doc, 1)
        local page_bbox = doc:getPageBBox(1)
        doc.bbox[1] = {
            x0 = page_bbox.x0 + 10,
            y0 = page_bbox.y0 + 10,
            x1 = page_bbox.x1 - 10,
            y1 = page_bbox.y1 - 10,
        }

        local bbox = Koptinterface:getSemiAutoBBox(doc, 1)
        assertNotAlmostEquals(semiauto_bbox.x0, bbox.x0, 0.5)
        assertNotAlmostEquals(semiauto_bbox.y0, bbox.y0, 0.5)
        assertNotAlmostEquals(semiauto_bbox.x1, bbox.x1, 0.5)
        assertNotAlmostEquals(semiauto_bbox.y1, bbox.y1, 0.5)
    end)

    it("should render optimized page to de-watermark", function()
        local page_dimen = doc:getPageDimensions(1, 1.0, 0)
        local tile = Koptinterface:renderOptimizedPage(doc, 1, nil,
            1.0, 0, 0)
        assert.truthy(tile)
        assert.are.same(page_dimen, tile.excerpt)
    end)

    it("should reflow page in foreground", function()
        doc.configurable.text_wrap = 1
        local kc = Koptinterface:getCachedContext(doc, 1)
        assert.truthy(kc)
    end)

    it("should hint reflowed page in background", function()
        doc.configurable.text_wrap = 1
        Koptinterface:hintReflowedPage(doc, 1, 1.0, 0, 1.0, 0)
        -- and wait for reflowing to complete
        local kc = Koptinterface:getCachedContext(doc, 1)
        assert.truthy(kc)
    end)

    it("should get native text boxes", function()
        Koptinterface:getCachedContext(doc, 1)
        local boxes = Koptinterface:getNativeTextBoxes(doc, 1)
        local lines_in_native_page = #boxes
        assert.truthy(lines_in_native_page == 60)
    end)

    it("should get native text boxes from scratch", function()
        Koptinterface:getCachedContext(doc, 1)
        local boxes = Koptinterface:getNativeTextBoxesFromScratch(doc, 1)
        local lines_in_native_page = #boxes
        assert.truthy(lines_in_native_page == 60)
    end)

    it("should get reflow text boxes", function()
        doc.configurable.text_wrap = 1
        Koptinterface:getCachedContext(doc, 1)
        local boxes = Koptinterface:getReflowedTextBoxes(doc, 1)
        local lines_in_reflowed_page = #boxes
        assert.truthy(lines_in_reflowed_page > 60)
    end)

    it("should get reflow text boxes from scratch", function()
        doc.configurable.text_wrap = 1
        Koptinterface:getCachedContext(doc, 1)
        local boxes = Koptinterface:getReflowedTextBoxesFromScratch(doc, 1)
        local lines_in_reflowed_page = #boxes
        assert.truthy(lines_in_reflowed_page > 60)
    end)

    it("should get page block of a two-column page", function()
        for i = 0.3, 0.6, 0.3 do
            for j = 0.3, 0.6, 0.3 do
                local block = Koptinterface:getPageBlock(complex_doc, 34, i, j)
                assert.truthy(block.x1 - block.x0 < 0.5)
            end
        end
    end)

    it("should get word from native position", function()
        local word_boxes = Koptinterface:getWordFromPosition(complex_doc, {
            page = 19, x = 400, y = 530,
        })
        assert.is.same("previous", word_boxes.word)
    end)

    it("should get word from reflow position", function()
        complex_doc.configurable.text_wrap = 1
        Koptinterface:getCachedContext(complex_doc, 19)
        local word_boxes = Koptinterface:getWordFromPosition(complex_doc, {
            page = 19, x = 320, y = 730,
        })
        assert.is.same("examples", word_boxes.word)
    end)

    it("should get link from native position", function()
        local link = Koptinterface:getLinkFromPosition(paper_doc, 1, {
            x = 140, y = 560,
        })
        assert.truthy(link)
        assert.is.same(20, link.page)
        require("dbg"):v("link", link)
    end)

    it("should get link from reflow position", function()
        paper_doc.configurable.text_wrap = 1
        local link = Koptinterface:getLinkFromPosition(paper_doc, 1, {
            x = 500, y = 480,
        })
        assert.truthy(link)
        assert.is.same(20, link.page)
    end)
end)