// An example of how scripting can be used to manipulate quests, as well as how messages and the state variable can be used to store and show information
// The code can be given basic changes using the state.configuration object, without needing to deal with the rest of the code
// The scenario this was made for can be seen at https://play.aidungeon.io/scenario/71bab1a0-9d70-11ea-8733-c15678a0b129

// INPUT MODIFIER

const modifier = (text) => {
    state.configuration = {
        enableSelectionOnCompletedQuest: false, // Whether quest selection should be restricted until a specific quest is completed
        enableSelectionOnQuest: 0, // The line number of the quest in the list of quests (e.g. quest on second line = 2) on the Edit Scenario page. Only used when the above is true.
        initialQuests: 0, // The amount of quests inputted into the Edit Scenario page
        quests: [ // The quests that will become available to the player either after the above quest is completed or at the start of the scenario.
            {
                name: "quit your job", // The quest's name, shown in the selection message
                objectives: ["resign from your job"], // The objectives that are part of the quest
                nextQuests: [ // The quests that should be assigned after the player completes this one
                    {
                        name: "find a new job",
                        objectives: ["get a job"],
                        nextQuests: []
                    }
                ]
            }
        ]
    }

    if (state.initialised != true) {
        state.finishedScenario = false
        state.initialised = true
        if (!state.configuration.enableSelectionOnCompletedQuest) {
            state.availableQuests = JSON.parse(JSON.stringify(state.configuration.quests))
        } else {
            state.availableQuests = []
        }
        state.assignedQuest = ""
        state.nextOutput = ""
    }

    state.nextOutput = ""

    if (text.toLowerCase().startsWith("\n> you take up quest ")) {
        state.assignedQuest = JSON.parse(JSON.stringify(state.availableQuests[text.toLowerCase().substring(21) - 1]))
        quests.push({
            quest: state.assignedQuest.objectives.shift()
        })
        state.nextOutput = "You decide that the next thing you want to do with your life is " + state.assignedQuest.name.toLowerCase() + "."
    } else if (text.toLowerCase().includes("\n> you give up on your quest.")) {
        state.nextOutput = "You give up on your quest to " + state.assignedQuest.name.toLowerCase() + "."
        state.assignedQuest = ""
        quests.splice(state.configuration.initialQuests)
    }

    return {
        text: text
    }
}

modifier(text)


// OUTPUT MODIFIER

const modifier = (text) => {

    let modifiedText = text

    if (!state.finishedScenario || !state.configuration.enableSelectionOnCompletedQuest) state.message = ""

    if ((state.finishedScenario || !state.configuration.enableSelectionOnCompletedQuest) && state.assignedQuest == "") {
        questNames = []
        for (quest of state.availableQuests) {
            questNames.push(quest.name)
        }
        state.message = "Available Quests: " + questNames.join(", ") + ". To take up a quest, type 'take up quest <quest number in list>'."
    } else if (state.assignedQuest != "") {
        if (!quests[state.configuration.initialQuests].completed) {
            state.message = "Current Objective: " + quests[state.configuration.initialQuests].quest + ". To quit, type 'give up on my quest'."
        } else {
            nextObjective = state.assignedQuest.objectives.shift()
            if (nextObjective == undefined) {
                quests.splice(state.configuration.initialQuests)
                state.availableQuests = state.availableQuests.filter(e => e.name !== state.assignedQuest.name)
                for (nextQuest of state.assignedQuest.nextQuests) {
                    state.availableQuests.push(nextQuest)
                }
                state.assignedQuest = ""
                questNames = []
                for (quest of state.availableQuests) {
                    questNames.push(quest.name)
                }
                state.message = "Available Quests: " + questNames.join(", ") + ". To take up a quest, type 'take up quest <quest number in list>'."
            } else {
                quests.splice(state.configuration.initialQuests)
                quests.push({
                    quest: nextObjective
                })
                state.message = "Objective completed! New objective: " + quests[state.configuration.initialQuests].quest + ". To quit, type 'give up on my quest'."
            }
        }
    }

    if (state.configuration.enableSelectionOnCompletedQuest) {
        if (quests[state.configuration.enableSelectionOnQuest - 1].completed == true && !state.finishedScenario) {
            state.message = "Quests have been assigned and will be accessible next turn."
            state.finishedScenario = true
            state.availableQuests = JSON.parse(JSON.stringify(state.configuration.quests))
        }
    }


    if (state.nextOutput !== "") {
        return {
            text: state.nextOutput
        }
    }

    return {
        text: modifiedText
    };
}

modifier(text)