import { BoardView } from "./blocks/boardView"
import { BoardTree } from "./boardTree"
import { OctoUtils } from "./octoUtils"
import { Utils } from "./utils"

class CsvExporter {

	static exportTableCsv(boardTree: BoardTree, view?: BoardView) {
		const { activeView } = boardTree
		const viewToExport = view ?? activeView

		const rows = CsvExporter.generateTableArray(boardTree, view)

		let csvContent = "data:text/csv;charset=utf-8,"

		rows.forEach((row) => {
			const encodedRow = row.join(",")
			csvContent += encodedRow + "\r\n"
		})

		const filename = `${Utils.sanitizeFilename(viewToExport.title)}.csv`
		const encodedUri = encodeURI(csvContent)
		const link = document.createElement("a")
		link.style.display = "none"
		link.setAttribute("href", encodedUri)
		link.setAttribute("download", filename)
		document.body.appendChild(link)						// FireFox support

		link.click()
		// TODO: Remove or reuse link
	}

	private static generateTableArray(boardTree: BoardTree, view?: BoardView): string[][] {
		const { board, cards, activeView } = boardTree
		const viewToExport = view ?? activeView

		const rows: string[][] = []
		const visibleProperties = board.cardProperties.filter(template => viewToExport.visiblePropertyIds.includes(template.id))

		{
			// Header row
			const row: string[] = []
			visibleProperties.forEach(template => {
				row.push(template.name)
			})
			rows.push(row)
		}

		cards.forEach(card => {
			const row: string[] = []
			visibleProperties.forEach(template => {
				const propertyValue = card.properties[template.id]
				const displayValue = OctoUtils.propertyDisplayValue(card, propertyValue, template) || ""
				if (template.type === "number") {
					const numericValue = propertyValue ? Number(propertyValue).toString() : undefined
					row.push(numericValue)
				} else {
					// Export as string
					row.push(`"${displayValue}"`)
				}
			})
			rows.push(row)
		})

		return rows
	}
}

export { CsvExporter }