const assert = require("assert")
const {kstateToState, stateToKState, diffKState, kstateStripConditionals} = require("./kstate")
const {test} = require("supertape")

test("kstate strip: strips false conditions", t => {
	t.deepEqual(kstateStripConditionals({
		a: {$if: false, value: 2},
		b: {value: 4}
	}), {
		b: {value: 4}
	})
})

test("kstate strip: keeps true conditions while removing $if", t => {
	t.deepEqual(kstateStripConditionals({
		a: {$if: true, value: 2},
		b: {value: 4}
	}), {
		a: {value: 2},
		b: {value: 4}
	})
})

test("kstate2state: general", t => {
	t.deepEqual(kstateToState({
		"m.room.name/": {name: "test name"},
		"m.room.member/@cadence:cadence.moe": {membership: "join"},
		"uk.half-shot.bridge/org.matrix.appservice-irc://irc/epicord.net/#general": {creator: "@cadence:cadence.moe"}
	}), [
		{
			type: "m.room.name",
			state_key: "",
			content: {
				name: "test name"
			}
		},
		{
			type: "m.room.member",
			state_key: "@cadence:cadence.moe",
			content: {
				membership: "join"
			}
		},
		{
			type: "uk.half-shot.bridge",
			state_key: "org.matrix.appservice-irc://irc/epicord.net/#general",
			content: {
				creator: "@cadence:cadence.moe"
			}
		}
	])
})

test("state2kstate: general", t => {
	t.deepEqual(stateToKState([
		{
			type: "m.room.name",
			state_key: "",
			content: {
				name: "test name"
			}
		},
		{
			type: "m.room.member",
			state_key: "@cadence:cadence.moe",
			content: {
				membership: "join"
			}
		},
		{
			type: "uk.half-shot.bridge",
			state_key: "org.matrix.appservice-irc://irc/epicord.net/#general",
			content: {
				creator: "@cadence:cadence.moe"
			}
		}
	]), {
		"m.room.name/": {name: "test name"},
		"m.room.member/@cadence:cadence.moe": {membership: "join"},
		"uk.half-shot.bridge/org.matrix.appservice-irc://irc/epicord.net/#general": {creator: "@cadence:cadence.moe"}
	})
})

test("diffKState: detects edits", t => {
	t.deepEqual(
		diffKState({
			"m.room.name/": {name: "test name"},
			"same/": {a: 2}
		}, {
			"m.room.name/": {name: "edited name"},
			"same/": {a: 2}
		}),
		{
			"m.room.name/": {name: "edited name"}
		}
	)
})

test("diffKState: detects new properties", t => {
	t.deepEqual(
		diffKState({
			"m.room.name/": {name: "test name"},
		}, {
			"m.room.name/": {name: "test name"},
			"new/": {a: 2}
		}),
		{
			"new/": {a: 2}
		}
	)
})

test("diffKState: power levels are mixed together", t => {
	const original = {
		"m.room.power_levels/": {
			"ban": 50,
			"events": {
				"m.room.name": 100,
				"m.room.power_levels": 100
			},
			"events_default": 0,
			"invite": 50,
			"kick": 50,
			"notifications": {
				"room": 20
			},
			"redact": 50,
			"state_default": 50,
			"users": {
				"@example:localhost": 100
			},
			"users_default": 0
		}
	}
	const result = diffKState(original, {
		"m.room.power_levels/": {
			"events": {
				"m.room.avatar": 0
			}
		}
	})
	t.deepEqual(result, {
		"m.room.power_levels/": {
			"ban": 50,
			"events": {
				"m.room.name": 100,
				"m.room.power_levels": 100,
				"m.room.avatar": 0
			},
			"events_default": 0,
			"invite": 50,
			"kick": 50,
			"notifications": {
				"room": 20
			},
			"redact": 50,
			"state_default": 50,
			"users": {
				"@example:localhost": 100
			},
			"users_default": 0
		}
	})
	t.notDeepEqual(original, result)
})

test("diffKState: cannot merge power levels if original power levels are missing", t => {
	const original = {}
	assert.throws(() =>
		diffKState(original, {
			"m.room.power_levels/": {
				"events": {
					"m.room.avatar": 0
				}
			}
		})
	, /original power level data is missing/)
	t.pass()
})

test("diffKState: kstate keys must contain a slash separator", t => {
	assert.throws(() =>
		diffKState({
			"m.room.name/": {name: "test name"},
		}, {
			"m.room.name/": {name: "test name"},
			"new": {a: 2}
		})
	, /does not contain a slash separator/)
	t.pass()
})