import XCTest
import Foundation
import ForgeColor
import ForgeGrade
import ForgeLibrary
@testable import ForgeExport

final class IngestMatchTests: XCTestCase {

    var mediaDir: String!
    var dbPath: String!
    var store: LibraryStore!
    var day: ForgeLibrary.Day!

    override func setUpWithError() throws {
        mediaDir = NSTemporaryDirectory() + "forge-ingest-\(UUID().uuidString)"
        try FileManager.default.createDirectory(atPath: mediaDir + "/CLIPS", withIntermediateDirectories: true)
        dbPath = NSTemporaryDirectory() + "forge-ingest-\(UUID().uuidString).db"
        store = try LibraryStore(path: dbPath)
        let p = try store.createProject(name: "P")
        day = try store.createDay(projectID: p.id, label: "Day 03", date: "2026-07-11")
    }

    override func tearDown() {
        try? FileManager.default.removeItem(atPath: mediaDir)
        try? FileManager.default.removeItem(atPath: dbPath)
    }

    func makeShot(clip: String, withGrade: Bool = true) throws {
        var snapshot: Data?
        if withGrade {
            let stack = GradeStack(nodes: [GradeNode(kind: .cdl(CDL(
                slope: SIMD3(1.2, 1.0, 0.9), offset: SIMD3(0.01, 0, 0),
                power: .one, saturation: 1.1)))])
            snapshot = try GradeSnapshot.encode(stack)
        }
        _ = try store.createShot(Shot(
            dayID: day.id, clipName: clip, cameraSlot: "A-Cam",
            timecodeIn: "10:00:00:00", timecodeOut: "10:01:00:00",
            gradeSnapshot: snapshot))
    }

    func makeMedia(_ name: String) throws {
        try Data("fake clip".utf8).write(to: URL(fileURLWithPath: mediaDir + "/CLIPS/\(name)"))
    }

    // Clip file matches shot by basename -> sidecar .cdl + .cube written next to media.
    func testMatchWritesSidecars() throws {
        try makeShot(clip: "R001C001")
        try makeMedia("R001C001.mov")

        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: IngestMatcher.Options(writeCDL: true, writeCube: true, latticeSize: 17))

        XCTAssertEqual(result.matched.count, 1)
        XCTAssertEqual(result.matched[0].clipName, "R001C001")
        XCTAssertTrue(FileManager.default.fileExists(atPath: mediaDir + "/CLIPS/R001C001.cdl"))
        XCTAssertTrue(FileManager.default.fileExists(atPath: mediaDir + "/CLIPS/R001C001.cube"))

        // CDL sidecar parses back to shot's grade.
        let cdlText = try String(contentsOfFile: mediaDir + "/CLIPS/R001C001.cdl", encoding: .utf8)
        let parsed = try CDLExport.parseCDL(cdlText)
        XCTAssertEqual(parsed.slope.x, 1.2, accuracy: 1e-5)
        XCTAssertEqual(parsed.saturation, 1.1, accuracy: 1e-5)
    }

    // Case-insensitive + extension-agnostic matching.
    func testMatchIsCaseAndExtensionAgnostic() throws {
        try makeShot(clip: "R001C002")
        try makeMedia("r001c002.MXF")
        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: true, writeCube: false, latticeSize: 17))
        XCTAssertEqual(result.matched.count, 1)
        XCTAssertTrue(FileManager.default.fileExists(atPath: mediaDir + "/CLIPS/r001c002.cdl"))
    }

    // Media with no shot record -> unmatched list.
    func testUnmatchedMediaListed() throws {
        try makeShot(clip: "R001C003")
        try makeMedia("R001C003.mov")
        try makeMedia("R001C099.mov") // no shot
        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: false, writeCube: false, latticeSize: 17))
        XCTAssertEqual(result.matched.count, 1)
        XCTAssertEqual(result.unmatchedMedia, ["CLIPS/R001C099.mov"])
    }

    // Shot with no media -> missing list.
    func testShotsWithoutMediaListed() throws {
        try makeShot(clip: "R001C004")
        try makeShot(clip: "R001C005")
        try makeMedia("R001C004.mov")
        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: false, writeCube: false, latticeSize: 17))
        XCTAssertEqual(result.shotsWithoutMedia, ["R001C005"])
    }

    // Shot without grade snapshot matches but writes no sidecars.
    func testNoGradeNoSidecar() throws {
        try makeShot(clip: "R001C006", withGrade: false)
        try makeMedia("R001C006.mov")
        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: true, writeCube: true, latticeSize: 17))
        XCTAssertEqual(result.matched.count, 1)
        XCTAssertFalse(result.matched[0].sidecarsWritten)
        XCTAssertFalse(FileManager.default.fileExists(atPath: mediaDir + "/CLIPS/R001C006.cdl"))
    }

    // Non-media files ignored.
    func testNonMediaIgnored() throws {
        try makeShot(clip: "R001C007")
        try makeMedia("R001C007.mov")
        try Data("x".utf8).write(to: URL(fileURLWithPath: mediaDir + "/CLIPS/notes.txt"))
        try Data("x".utf8).write(to: URL(fileURLWithPath: mediaDir + "/manifest.mhl"))
        let result = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: false, writeCube: false, latticeSize: 17))
        XCTAssertEqual(result.matched.count, 1)
        XCTAssertTrue(result.unmatchedMedia.isEmpty)
    }

    // Existing sidecar not overwritten unless force.
    func testExistingSidecarPreserved() throws {
        try makeShot(clip: "R001C008")
        try makeMedia("R001C008.mov")
        try Data("existing".utf8).write(to: URL(fileURLWithPath: mediaDir + "/CLIPS/R001C008.cdl"))

        _ = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: true, writeCube: false, latticeSize: 17))
        let content = try String(contentsOfFile: mediaDir + "/CLIPS/R001C008.cdl", encoding: .utf8)
        XCTAssertEqual(content, "existing")

        _ = try IngestMatcher.match(
            mediaRoot: mediaDir, store: store, dayID: day.id,
            options: .init(writeCDL: true, writeCube: false, latticeSize: 17, force: true))
        let after = try String(contentsOfFile: mediaDir + "/CLIPS/R001C008.cdl", encoding: .utf8)
        XCTAssertTrue(after.contains("ColorDecisionList"))
    }
}