import type { ExportBundle } from "@initiative/domain";
import { describe, expect, it } from "vitest";
import { validateImportBundle } from "../persistence/export-import.js";

function validBundle(): Record<string, unknown> {
	return {
		version: 1,
		exportedAt: "2026-03-27T12:00:00.000Z",
		encounter: {
			combatants: [{ id: "c-1", name: "Goblin", initiative: 15 }],
			activeIndex: 0,
			roundNumber: 1,
		},
		undoStack: [],
		redoStack: [],
		playerCharacters: [],
	};
}

describe("validateImportBundle", () => {
	it("accepts a valid bundle", () => {
		const result = validateImportBundle(validBundle());
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.version).toBe(1);
		expect(bundle.encounter.combatants).toHaveLength(1);
		expect(bundle.encounter.combatants[0].name).toBe("Goblin");
	});

	it("accepts a valid bundle with empty encounter", () => {
		const input = {
			...validBundle(),
			encounter: { combatants: [], activeIndex: 0, roundNumber: 1 },
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.encounter.combatants).toHaveLength(0);
	});

	it("accepts a bundle with undo/redo stacks", () => {
		const enc = {
			combatants: [{ id: "c-1", name: "Orc" }],
			activeIndex: 0,
			roundNumber: 1,
		};
		const input = {
			...validBundle(),
			undoStack: [enc],
			redoStack: [enc],
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.undoStack).toHaveLength(1);
		expect(bundle.redoStack).toHaveLength(1);
	});

	it("accepts a bundle with player characters", () => {
		const input = {
			...validBundle(),
			playerCharacters: [
				{
					id: "pc-1",
					name: "Aria",
					ac: 16,
					maxHp: 45,
					color: "blue",
					icon: "sword",
				},
			],
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.playerCharacters).toHaveLength(1);
		expect(bundle.playerCharacters[0].name).toBe("Aria");
	});

	it("rejects non-object input", () => {
		expect(validateImportBundle(null)).toBe("Invalid file format");
		expect(validateImportBundle(42)).toBe("Invalid file format");
		expect(validateImportBundle("string")).toBe("Invalid file format");
		expect(validateImportBundle([])).toBe("Invalid file format");
		expect(validateImportBundle(undefined)).toBe("Invalid file format");
	});

	it("rejects missing version field", () => {
		const input = validBundle();
		delete input.version;
		expect(validateImportBundle(input)).toBe("Invalid file format");
	});

	it("rejects version 0 or negative", () => {
		expect(validateImportBundle({ ...validBundle(), version: 0 })).toBe(
			"Invalid file format",
		);
		expect(validateImportBundle({ ...validBundle(), version: -1 })).toBe(
			"Invalid file format",
		);
	});

	it("rejects unknown version", () => {
		expect(validateImportBundle({ ...validBundle(), version: 99 })).toBe(
			"Invalid file format",
		);
	});

	it("rejects missing encounter field", () => {
		const input = validBundle();
		delete input.encounter;
		expect(validateImportBundle(input)).toBe("Invalid encounter data");
	});

	it("rejects invalid encounter data", () => {
		expect(
			validateImportBundle({ ...validBundle(), encounter: "not an object" }),
		).toBe("Invalid encounter data");
	});

	it("rejects missing undoStack", () => {
		const input = validBundle();
		delete input.undoStack;
		expect(validateImportBundle(input)).toBe("Invalid file format");
	});

	it("rejects missing redoStack", () => {
		const input = validBundle();
		delete input.redoStack;
		expect(validateImportBundle(input)).toBe("Invalid file format");
	});

	it("rejects missing playerCharacters", () => {
		const input = validBundle();
		delete input.playerCharacters;
		expect(validateImportBundle(input)).toBe("Invalid file format");
	});

	it("rejects non-string exportedAt", () => {
		expect(validateImportBundle({ ...validBundle(), exportedAt: 12345 })).toBe(
			"Invalid file format",
		);
	});

	it("drops invalid entries from undo stack", () => {
		const valid = {
			combatants: [{ id: "c-1", name: "Orc" }],
			activeIndex: 0,
			roundNumber: 1,
		};
		const input = {
			...validBundle(),
			undoStack: [valid, "invalid", { bad: true }, valid],
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.undoStack).toHaveLength(2);
	});

	it("drops invalid player characters", () => {
		const input = {
			...validBundle(),
			playerCharacters: [
				{ id: "pc-1", name: "Valid", ac: 10, maxHp: 20 },
				{ id: "", name: "Bad ID" },
				"not an object",
				{ id: "pc-3", name: "Also Valid", ac: 15, maxHp: 30 },
			],
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.playerCharacters).toHaveLength(2);
	});

	it("rejects JSON array instead of object", () => {
		expect(validateImportBundle([1, 2, 3])).toBe("Invalid file format");
	});

	it("rejects encounter that fails rehydration (missing combatant fields)", () => {
		const input = {
			...validBundle(),
			encounter: {
				combatants: [{ noId: true }],
				activeIndex: 0,
				roundNumber: 1,
			},
		};
		expect(validateImportBundle(input)).toBe("Invalid encounter data");
	});

	it("strips invalid color/icon from player characters but keeps the character", () => {
		const input = {
			...validBundle(),
			playerCharacters: [
				{
					id: "pc-1",
					name: "Test",
					ac: 10,
					maxHp: 20,
					color: "neon-pink",
					icon: "bazooka",
				},
			],
		};
		const result = validateImportBundle(input);
		// rehydrateCharacter rejects characters with invalid color/icon members
		// that are not in the valid sets, so this character is dropped
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.playerCharacters).toHaveLength(0);
	});

	it("keeps player characters with valid optional color and icon", () => {
		const input = {
			...validBundle(),
			playerCharacters: [
				{
					id: "pc-1",
					name: "Aria",
					ac: 16,
					maxHp: 45,
					color: "blue",
					icon: "sword",
				},
			],
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.playerCharacters).toHaveLength(1);
		expect(bundle.playerCharacters[0].color).toBe("blue");
		expect(bundle.playerCharacters[0].icon).toBe("sword");
	});

	it("ignores unknown extra fields on the bundle", () => {
		const input = {
			...validBundle(),
			unknownField: "should be ignored",
			anotherExtra: 42,
		};
		const result = validateImportBundle(input);
		expect(typeof result).toBe("object");
		const bundle = result as ExportBundle;
		expect(bundle.version).toBe(1);
		expect("unknownField" in bundle).toBe(false);
	});
});