//
//  MockCareScheduleRepository.swift
//  PlantGuideTests
//
//  Mock implementation of CareScheduleRepositoryProtocol for unit testing.
//  Provides configurable behavior and call tracking for verification.
//

import Foundation
@testable import PlantGuide

// MARK: - MockCareScheduleRepository

/// Mock implementation of CareScheduleRepositoryProtocol for testing
final class MockCareScheduleRepository: CareScheduleRepositoryProtocol, @unchecked Sendable {

    // MARK: - Storage

    var schedules: [UUID: PlantCareSchedule] = [:]

    // MARK: - Call Tracking

    var saveCallCount = 0
    var fetchForPlantCallCount = 0
    var fetchAllCallCount = 0
    var fetchAllTasksCallCount = 0
    var updateTaskCallCount = 0
    var deleteCallCount = 0

    // MARK: - Error Configuration

    var shouldThrowOnSave = false
    var shouldThrowOnFetch = false
    var shouldThrowOnFetchAll = false
    var shouldThrowOnFetchAllTasks = false
    var shouldThrowOnUpdateTask = false
    var shouldThrowOnDelete = false

    var errorToThrow: Error = NSError(
        domain: "MockError",
        code: -1,
        userInfo: [NSLocalizedDescriptionKey: "Mock care schedule repository error"]
    )

    // MARK: - Captured Values

    var lastSavedSchedule: PlantCareSchedule?
    var lastFetchedPlantID: UUID?
    var lastUpdatedTask: CareTask?
    var lastDeletedPlantID: UUID?

    // MARK: - CareScheduleRepositoryProtocol

    func save(_ schedule: PlantCareSchedule) async throws {
        saveCallCount += 1
        lastSavedSchedule = schedule
        if shouldThrowOnSave {
            throw errorToThrow
        }
        schedules[schedule.plantID] = schedule
    }

    func fetch(for plantID: UUID) async throws -> PlantCareSchedule? {
        fetchForPlantCallCount += 1
        lastFetchedPlantID = plantID
        if shouldThrowOnFetch {
            throw errorToThrow
        }
        return schedules[plantID]
    }

    func fetchAll() async throws -> [PlantCareSchedule] {
        fetchAllCallCount += 1
        if shouldThrowOnFetchAll {
            throw errorToThrow
        }
        return Array(schedules.values)
    }

    func fetchAllTasks() async throws -> [CareTask] {
        fetchAllTasksCallCount += 1
        if shouldThrowOnFetchAllTasks {
            throw errorToThrow
        }
        return schedules.values.flatMap { $0.tasks }
    }

    func updateTask(_ task: CareTask) async throws {
        updateTaskCallCount += 1
        lastUpdatedTask = task
        if shouldThrowOnUpdateTask {
            throw errorToThrow
        }

        // Find and update the task in the appropriate schedule
        for (plantID, var schedule) in schedules {
            if let index = schedule.tasks.firstIndex(where: { $0.id == task.id }) {
                schedule.tasks[index] = task
                schedules[plantID] = schedule
                break
            }
        }
    }

    func delete(for plantID: UUID) async throws {
        deleteCallCount += 1
        lastDeletedPlantID = plantID
        if shouldThrowOnDelete {
            throw errorToThrow
        }
        schedules.removeValue(forKey: plantID)
    }

    // MARK: - Helper Methods

    /// Resets all state for clean test setup
    func reset() {
        schedules = [:]

        saveCallCount = 0
        fetchForPlantCallCount = 0
        fetchAllCallCount = 0
        fetchAllTasksCallCount = 0
        updateTaskCallCount = 0
        deleteCallCount = 0

        shouldThrowOnSave = false
        shouldThrowOnFetch = false
        shouldThrowOnFetchAll = false
        shouldThrowOnFetchAllTasks = false
        shouldThrowOnUpdateTask = false
        shouldThrowOnDelete = false

        lastSavedSchedule = nil
        lastFetchedPlantID = nil
        lastUpdatedTask = nil
        lastDeletedPlantID = nil
    }

    /// Adds a schedule directly to storage (bypasses save method)
    func addSchedule(_ schedule: PlantCareSchedule) {
        schedules[schedule.plantID] = schedule
    }

    /// Adds multiple schedules directly to storage
    func addSchedules(_ schedulesToAdd: [PlantCareSchedule]) {
        for schedule in schedulesToAdd {
            schedules[schedule.plantID] = schedule
        }
    }

    /// Gets all tasks for a specific plant
    func getTasks(for plantID: UUID) -> [CareTask] {
        schedules[plantID]?.tasks ?? []
    }

    /// Gets overdue tasks across all schedules
    func getOverdueTasks() -> [CareTask] {
        schedules.values.flatMap { $0.overdueTasks }
    }

    /// Gets pending tasks across all schedules
    func getPendingTasks() -> [CareTask] {
        schedules.values.flatMap { $0.pendingTasks }
    }
}